This file is part of GNUnet
Copyright (C) 2009-2017 GNUnet e.V.
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ Affero General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @file util/scheduler.c
#include "platform.h"
#include "gnunet_util_lib.h"
#include "disk.h"
+// DEBUG
+#include <inttypes.h>
-#define LOG(kind,...) GNUNET_log_from (kind, "util-scheduler", __VA_ARGS__)
+#define LOG(kind, ...) GNUNET_log_from (kind, "util-scheduler", __VA_ARGS__)
-#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util-scheduler", syscall)
+#define LOG_STRERROR(kind, syscall) GNUNET_log_from_strerror (kind, \
+ "util-scheduler", \
+ syscall)
#if HAVE_EXECINFO_H
/**
* Argument to be passed from the driver to
- * #GNUNET_SCHEDULER_run_from_driver(). Contains the
+ * #GNUNET_SCHEDULER_do_work(). Contains the
* scheduler's internal state.
*/
struct GNUNET_SCHEDULER_Handle
* @deprecated
*/
struct GNUNET_NETWORK_FDSet *ws;
+
+ /**
+ * context of the SIGINT handler
+ */
+ struct GNUNET_SIGNAL_Context *shc_int;
+
+ /**
+ * context of the SIGTERM handler
+ */
+ struct GNUNET_SIGNAL_Context *shc_term;
+
+#if (SIGTERM != GNUNET_TERM_SIG)
+ /**
+ * context of the TERM_SIG handler
+ */
+ struct GNUNET_SIGNAL_Context *shc_gterm;
+#endif
+
+ /**
+ * context of the SIGQUIT handler
+ */
+ struct GNUNET_SIGNAL_Context *shc_quit;
+
+ /**
+ * context of the SIGHUP handler
+ */
+ struct GNUNET_SIGNAL_Context *shc_hup;
+
+ /**
+ * context of hte SIGPIPE handler
+ */
+ struct GNUNET_SIGNAL_Context *shc_pipe;
};
*/
unsigned int fds_len;
- /**
- * if this task is related to multiple FDs this array contains
- * all FdInfo structs that were marked as ready by calling
- * #GNUNET_SCHEDULER_task_ready
- */
- struct GNUNET_SCHEDULER_FdInfo *ready_fds;
-
- /**
- * Size of the @e ready_fds array
- */
- unsigned int ready_fds_len;
-
/**
* Do we own the network and file handles referenced by the FdInfo
* structs in the fds array. This will only be GNUNET_YES if the
int num_backtrace_strings;
#endif
+ /**
+ * Asynchronous scope of the task that scheduled this scope,
+ */
+ struct GNUNET_AsyncScopeSave scope;
};
struct Scheduled *scheduled_tail;
/**
- * the time until the select driver will wake up again (after
+ * the time when the select driver will wake up again (after
* calling select)
*/
- struct GNUNET_TIME_Relative timeout;
+ struct GNUNET_TIME_Absolute timeout;
};
/**
* The driver used for the event loop. Will be handed over to
- * the scheduler in #GNUNET_SCHEDULER_run_from_driver(), peristed
+ * the scheduler in #GNUNET_SCHEDULER_do_work(), persisted
* there in this variable for later use in functions like
* #GNUNET_SCHEDULER_add_select(), #add_without_sets() and
* #GNUNET_SCHEDULER_cancel().
/**
* Head of list of tasks ready to run right now, grouped by importance.
*/
-static struct GNUNET_SCHEDULER_Task *ready_head[GNUNET_SCHEDULER_PRIORITY_COUNT];
+static struct
+GNUNET_SCHEDULER_Task *ready_head[GNUNET_SCHEDULER_PRIORITY_COUNT];
/**
* Tail of list of tasks ready to run right now, grouped by importance.
*/
-static struct GNUNET_SCHEDULER_Task *ready_tail[GNUNET_SCHEDULER_PRIORITY_COUNT];
+static struct
+GNUNET_SCHEDULER_Task *ready_tail[GNUNET_SCHEDULER_PRIORITY_COUNT];
/**
- * Number of tasks on the ready list.
+ * Task for installing parent control handlers (it might happen that the
+ * scheduler is shutdown before this task is executed, so
+ * GNUNET_SCHEDULER_shutdown must cancel it in that case)
*/
-static unsigned int ready_count;
+static struct GNUNET_SCHEDULER_Task *install_parent_control_task;
/**
- * How many tasks have we run so far?
+ * Task for reading from a pipe that signal handlers will use to initiate
+ * shutdown
*/
-static unsigned long long tasks_run;
+static struct GNUNET_SCHEDULER_Task *shutdown_pipe_task;
+
+/**
+ * Number of tasks on the ready list.
+ */
+static unsigned int ready_count;
/**
* Priority of the task running right now. Only
*/
static void *scheduler_select_cls;
-/**
- * Scheduler handle used for the driver functions
- */
-static struct GNUNET_SCHEDULER_Handle sh;
-
/**
* Sets the select function to use in the scheduler (scheduler_select).
{
if (0 != pos->reason)
{
- timeout = now;
+ return now;
}
else
{
{
if (0 != pos->reason)
{
- timeout = now;
+ return now;
}
- else if ((pos->timeout.abs_value_us != GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us) &&
+ else if ((pos->timeout.abs_value_us !=
+ GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us) &&
(timeout.abs_value_us > pos->timeout.abs_value_us))
{
timeout = pos->timeout;
{
struct GNUNET_SCHEDULER_Task *pos;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "GNUNET_SCHEDULER_shutdown\n");
+ if (NULL != install_parent_control_task)
+ {
+ GNUNET_SCHEDULER_cancel (install_parent_control_task);
+ install_parent_control_task = NULL;
+ }
+ if (NULL != shutdown_pipe_task)
+ {
+ GNUNET_SCHEDULER_cancel (shutdown_pipe_task);
+ shutdown_pipe_task = NULL;
+ }
while (NULL != (pos = shutdown_head))
{
GNUNET_CONTAINER_DLL_remove (shutdown_head,
dump_backtrace (struct GNUNET_SCHEDULER_Task *t)
{
#if EXECINFO
- unsigned int i;
-
- for (i = 0; i < t->num_backtrace_strings; i++)
+ for (unsigned int i = 0; i < t->num_backtrace_strings; i++)
LOG (GNUNET_ERROR_TYPE_WARNING,
- "Task %p trace %u: %s\n",
- t,
- i,
- t->backtrace_strings[i]);
+ "Task %p trace %u: %s\n",
+ t,
+ i,
+ t->backtrace_strings[i]);
+#else
+ (void) t;
#endif
}
const struct GNUNET_DISK_FileHandle *fh = t->fds[i].fh;
if (fd)
{
- GNUNET_NETWORK_socket_free_memory_only_ ((struct GNUNET_NETWORK_Handle *) fd);
+ GNUNET_NETWORK_socket_free_memory_only_ ((struct
+ GNUNET_NETWORK_Handle *) fd);
}
if (fh)
{
{
GNUNET_array_grow (t->fds, t->fds_len, 0);
}
- if (t->ready_fds_len > 0)
- {
- GNUNET_array_grow (t->ready_fds, t->ready_fds_len, 0);
- }
#if EXECINFO
GNUNET_free (t->backtrace_strings);
#endif
/**
* Signal handler called for SIGPIPE.
*/
-#ifndef MINGW
static void
sighandler_pipe ()
{
return;
}
-#endif
///**
// *
// * @param ms how many ms to wait
// */
-//static void
-//short_wait (unsigned int ms)
-//{
+// static void
+// short_wait (unsigned int ms)
+// {
// struct GNUNET_TIME_Relative timeout;
//
// timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, ms);
// (void) GNUNET_NETWORK_socket_select (NULL, NULL, NULL, timeout);
-//}
+// }
/**
int old_errno = errno; /* backup errno */
if (getpid () != my_pid)
- exit (1); /* we have fork'ed since the signal handler was created,
- * ignore the signal, see https://gnunet.org/vfork discussion */
+ _exit (1); /* we have fork'ed since the signal handler was created,
+ * ignore the signal, see https://gnunet.org/vfork discussion */
GNUNET_DISK_file_write (GNUNET_DISK_pipe_handle
- (shutdown_pipe_handle, GNUNET_DISK_PIPE_END_WRITE),
- &c, sizeof (c));
+ (shutdown_pipe_handle, GNUNET_DISK_PIPE_END_WRITE),
+ &c, sizeof(c));
errno = old_errno;
}
-void
+static void
shutdown_if_no_lifeness ()
{
struct GNUNET_SCHEDULER_Task *t;
for (t = pending_timeout_head; NULL != t; t = t->next)
if (GNUNET_YES == t->lifeness)
return;
- /* No lifeness! Cancel all pending tasks the driver knows about and shutdown */
- t = pending_head;
- while (NULL != t)
- {
- struct GNUNET_SCHEDULER_Task *next = t->next;
- GNUNET_SCHEDULER_cancel (t);
- t = next;
- }
+ /* No lifeness! */
GNUNET_SCHEDULER_shutdown ();
}
+static int
+select_loop (struct GNUNET_SCHEDULER_Handle *sh,
+ struct DriverContext *context);
+
+
/**
* Initialize and run scheduler. This function will return when all
* tasks have completed. On systems with signals, receiving a SIGTERM
GNUNET_SCHEDULER_run (GNUNET_SCHEDULER_TaskCallback task,
void *task_cls)
{
+ struct GNUNET_SCHEDULER_Handle *sh;
struct GNUNET_SCHEDULER_Driver *driver;
- struct DriverContext context = {.scheduled_head = NULL,
- .scheduled_tail = NULL,
- .timeout = GNUNET_TIME_UNIT_FOREVER_REL};
-
+ struct DriverContext context = { .scheduled_head = NULL,
+ .scheduled_tail = NULL,
+ .timeout = GNUNET_TIME_absolute_get () };
+
driver = GNUNET_SCHEDULER_driver_select ();
driver->cls = &context;
-
- GNUNET_SCHEDULER_run_with_driver (driver, task, task_cls);
-
+ sh = GNUNET_SCHEDULER_driver_init (driver);
+ GNUNET_SCHEDULER_add_with_reason_and_priority (task,
+ task_cls,
+ GNUNET_SCHEDULER_REASON_STARTUP,
+ GNUNET_SCHEDULER_PRIORITY_DEFAULT);
+ select_loop (sh,
+ &context);
+ GNUNET_SCHEDULER_driver_done (sh);
GNUNET_free (driver);
}
t->fds = fdi;
if (1 == read_nh_len)
{
+ GNUNET_assert (NULL != read_nh);
+ GNUNET_assert (NULL != *read_nh);
fdi->fd = *read_nh;
- GNUNET_assert (NULL != fdi->fd);
fdi->et = GNUNET_SCHEDULER_ET_IN;
fdi->sock = GNUNET_NETWORK_get_fd (*read_nh);
t->read_fd = fdi->sock;
}
else if (1 == write_nh_len)
{
+ GNUNET_assert (NULL != write_nh);
+ GNUNET_assert (NULL != *write_nh);
fdi->fd = *write_nh;
- GNUNET_assert (NULL != fdi->fd);
fdi->et = GNUNET_SCHEDULER_ET_OUT;
fdi->sock = GNUNET_NETWORK_get_fd (*write_nh);
t->read_fd = -1;
}
else if (1 == read_fh_len)
{
+ GNUNET_assert (NULL != read_fh);
+ GNUNET_assert (NULL != *read_fh);
fdi->fh = *read_fh;
- GNUNET_assert (NULL != fdi->fh);
fdi->et = GNUNET_SCHEDULER_ET_IN;
- fdi->sock = (*read_fh)->fd; // FIXME: does not work under WIN32
+ fdi->sock = (*read_fh)->fd; // FIXME: does not work under WIN32
t->read_fd = fdi->sock;
t->write_fd = -1;
}
else
{
+ GNUNET_assert (NULL != write_fh);
+ GNUNET_assert (NULL != *write_fh);
fdi->fh = *write_fh;
- GNUNET_assert (NULL != fdi->fh);
fdi->et = GNUNET_SCHEDULER_ET_OUT;
- fdi->sock = (*write_fh)->fd; // FIXME: does not work under WIN32
+ fdi->sock = (*write_fh)->fd; // FIXME: does not work under WIN32
t->read_fd = -1;
t->write_fd = fdi->sock;
}
fdi->fh = read_fh[i];
GNUNET_assert (NULL != fdi->fh);
fdi->et = GNUNET_SCHEDULER_ET_IN;
- fdi->sock = (read_fh[i])->fd; // FIXME: does not work under WIN32
+ fdi->sock = (read_fh[i])->fd; // FIXME: does not work under WIN32
++fdi;
}
for (i = 0; i != write_fh_len; ++i)
fdi->fh = write_fh[i];
GNUNET_assert (NULL != fdi->fh);
fdi->et = GNUNET_SCHEDULER_ET_OUT;
- fdi->sock = (write_fh[i])->fd; // FIXME: does not work under WIN32
+ fdi->sock = (write_fh[i])->fd; // FIXME: does not work under WIN32
++fdi;
}
}
* @param et the event type to be set in each FdInfo after calling
* @a driver_func on it, or -1 if no updating not desired.
*/
-void driver_add_multiple (struct GNUNET_SCHEDULER_Task *t,
- enum GNUNET_SCHEDULER_EventType et)
+static void
+driver_add_multiple (struct GNUNET_SCHEDULER_Task *t)
{
struct GNUNET_SCHEDULER_FdInfo *fdi;
int success = GNUNET_YES;
- for (int i = 0; i != t->fds_len; ++i)
+ for (unsigned int i = 0; i != t->fds_len; ++i)
{
fdi = &t->fds[i];
- success = scheduler_driver->add (scheduler_driver->cls, t, fdi) && success;
- if (et != -1)
- {
- fdi->et = et;
- }
+ success = scheduler_driver->add (scheduler_driver->cls,
+ t,
+ fdi) && success;
+ fdi->et = GNUNET_SCHEDULER_ET_NONE;
}
if (GNUNET_YES != success)
{
}
-void
-shutdown_cb (void *cls)
+static void
+install_parent_control_handler (void *cls)
+{
+ (void) cls;
+ install_parent_control_task = NULL;
+ GNUNET_OS_install_parent_control_handler (NULL);
+}
+
+
+static void
+shutdown_pipe_cb (void *cls)
{
char c;
const struct GNUNET_DISK_FileHandle *pr;
+ (void) cls;
+ shutdown_pipe_task = NULL;
pr = GNUNET_DISK_pipe_handle (shutdown_pipe_handle,
GNUNET_DISK_PIPE_END_READ);
GNUNET_assert (! GNUNET_DISK_handle_invalid (pr));
/* consume the signal */
- GNUNET_DISK_file_read (pr, &c, sizeof (c));
+ GNUNET_DISK_file_read (pr, &c, sizeof(c));
/* mark all active tasks as ready due to shutdown */
GNUNET_SCHEDULER_shutdown ();
+ shutdown_pipe_task =
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ pr,
+ &shutdown_pipe_cb,
+ NULL);
}
/**
* Cancel the task with the specified identifier.
* The task must not yet have run. Only allowed to be called as long as the
- * scheduler is running (#GNUNET_SCHEDULER_run or
- * #GNUNET_SCHEDULER_run_with_driver has been called and has not returned yet).
+ * scheduler is running, that is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param task id of the task to cancel
* @return original closure of the task
/* scheduler must be running */
GNUNET_assert (NULL != scheduler_driver);
- GNUNET_assert ( (NULL != active_task) ||
- (GNUNET_NO == task->lifeness) );
is_fd_task = (NULL != task->fds);
if (is_fd_task)
{
t->num_backtrace_strings
= backtrace (backtrace_array, MAX_TRACE_DEPTH);
t->backtrace_strings =
- backtrace_symbols (backtrace_array,
- t->num_backtrace_strings);
+ backtrace_symbols (backtrace_array,
+ t->num_backtrace_strings);
dump_backtrace (t);
+#else
+ (void) t;
#endif
}
* @param priority priority to use for the task
*/
void
-GNUNET_SCHEDULER_add_with_reason_and_priority (GNUNET_SCHEDULER_TaskCallback task,
+GNUNET_SCHEDULER_add_with_reason_and_priority (GNUNET_SCHEDULER_TaskCallback
+ task,
void *task_cls,
- enum GNUNET_SCHEDULER_Reason reason,
- enum GNUNET_SCHEDULER_Priority priority)
+ enum GNUNET_SCHEDULER_Reason
+ reason,
+ enum GNUNET_SCHEDULER_Priority
+ priority)
{
struct GNUNET_SCHEDULER_Task *t;
+ /* scheduler must be running */
+ GNUNET_assert (NULL != scheduler_driver);
GNUNET_assert (NULL != task);
- GNUNET_assert ((NULL != active_task) ||
- (GNUNET_SCHEDULER_REASON_STARTUP == reason));
t = GNUNET_new (struct GNUNET_SCHEDULER_Task);
t->read_fd = -1;
t->write_fd = -1;
t->start_time = GNUNET_TIME_absolute_get ();
#endif
t->reason = reason;
- t->priority = priority;
+ t->priority = check_priority (priority);
t->lifeness = current_lifeness;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Adding continuation task %p\n",
struct GNUNET_SCHEDULER_Task *pos;
struct GNUNET_SCHEDULER_Task *prev;
- GNUNET_assert (NULL != active_task);
+ /* scheduler must be running */
+ GNUNET_assert (NULL != scheduler_driver);
GNUNET_assert (NULL != task);
t = GNUNET_new (struct GNUNET_SCHEDULER_Task);
+ GNUNET_async_scope_get (&t->scope);
t->callback = task;
t->callback_cls = task_cls;
t->read_fd = -1;
t->start_time = GNUNET_TIME_absolute_get ();
#endif
t->timeout = at;
- t->priority = priority;
+ t->priority = check_priority (priority);
t->lifeness = current_lifeness;
/* try tail first (optimization in case we are
* appending to a long list of tasks with timeouts) */
- if ( (NULL == pending_timeout_head) ||
- (at.abs_value_us < pending_timeout_head->timeout.abs_value_us) )
+ if ((NULL == pending_timeout_head) ||
+ (at.abs_value_us < pending_timeout_head->timeout.abs_value_us))
{
GNUNET_CONTAINER_DLL_insert (pending_timeout_head,
pending_timeout_tail,
{
/* first move from heuristic start backwards to before start time */
prev = pending_timeout_last;
- while ( (NULL != prev) &&
- (prev->timeout.abs_value_us > t->timeout.abs_value_us) )
+ while ((NULL != prev) &&
+ (prev->timeout.abs_value_us > t->timeout.abs_value_us))
prev = prev->prev;
/* now, move from heuristic start (or head of list) forward to insertion point */
if (NULL == prev)
pos = pending_timeout_head;
else
pos = prev->next;
- while ( (NULL != pos) &&
- ( (pos->timeout.abs_value_us <= t->timeout.abs_value_us) ||
- (0 != pos->reason) ) )
+ while ((NULL != pos) && (pos->timeout.abs_value_us <=
+ t->timeout.abs_value_us))
{
prev = pos;
pos = pos->next;
*/
struct GNUNET_SCHEDULER_Task *
GNUNET_SCHEDULER_add_delayed_with_priority (struct GNUNET_TIME_Relative delay,
- enum GNUNET_SCHEDULER_Priority priority,
- GNUNET_SCHEDULER_TaskCallback task,
+ enum GNUNET_SCHEDULER_Priority
+ priority,
+ GNUNET_SCHEDULER_TaskCallback task,
void *task_cls)
{
- return GNUNET_SCHEDULER_add_at_with_priority (GNUNET_TIME_relative_to_absolute (delay),
- priority,
- task,
- task_cls);
+ return GNUNET_SCHEDULER_add_at_with_priority (
+ GNUNET_TIME_relative_to_absolute (delay),
+ priority,
+ task,
+ task_cls);
}
void *task_cls)
{
return GNUNET_SCHEDULER_add_delayed_with_priority (delay,
- GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- task,
- task_cls);
+ GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ task,
+ task_cls);
}
{
struct GNUNET_SCHEDULER_Task *t;
- GNUNET_assert (NULL != active_task);
+ /* scheduler must be running */
+ GNUNET_assert (NULL != scheduler_driver);
GNUNET_assert (NULL != task);
t = GNUNET_new (struct GNUNET_SCHEDULER_Task);
+ GNUNET_async_scope_get (&t->scope);
t->callback = task;
t->callback_cls = task_cls;
t->read_fd = -1;
}
}
}
+
+
#endif
* @return unique task identifier for the job
* only valid until @a task is started!
*/
-#ifndef MINGW
static struct GNUNET_SCHEDULER_Task *
add_without_sets (struct GNUNET_TIME_Relative delay,
enum GNUNET_SCHEDULER_Priority priority,
{
struct GNUNET_SCHEDULER_Task *t;
- GNUNET_assert (NULL != active_task);
+ /* scheduler must be running */
+ GNUNET_assert (NULL != scheduler_driver);
GNUNET_assert (NULL != task);
t = GNUNET_new (struct GNUNET_SCHEDULER_Task);
+ GNUNET_async_scope_get (&t->scope);
init_fd_info (t,
&read_nh,
read_nh ? 1 : 0,
t->start_time = GNUNET_TIME_absolute_get ();
#endif
t->timeout = GNUNET_TIME_relative_to_absolute (delay);
- t->priority = check_priority ((priority == GNUNET_SCHEDULER_PRIORITY_KEEP) ? current_priority : priority);
+ t->priority = check_priority ((priority == GNUNET_SCHEDULER_PRIORITY_KEEP) ?
+ current_priority : priority);
t->lifeness = current_lifeness;
GNUNET_CONTAINER_DLL_insert (pending_head,
pending_tail,
t);
- driver_add_multiple (t, GNUNET_SCHEDULER_ET_NONE);
+ driver_add_multiple (t);
max_priority_added = GNUNET_MAX (max_priority_added,
t->priority);
init_backtrace (t);
return t;
}
-#endif
/**
* used as a timeout on the socket being ready. The task will be
* scheduled for execution once either the delay has expired or the
* socket operation is ready. It will be run with the DEFAULT priority.
- * Only allowed to be called as long as the scheduler is running
- * (#GNUNET_SCHEDULER_run or #GNUNET_SCHEDULER_run_with_driver has been
- * called and has not returned yet).
+ * Only allowed to be called as long as the scheduler is running, that
+ * is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param delay when should this operation time out?
* @param rfd read file-descriptor
void *task_cls)
{
return GNUNET_SCHEDULER_add_read_net_with_priority (delay,
- GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- rfd, task, task_cls);
+ GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ rfd, task, task_cls);
}
* socket being ready. The task will be scheduled for execution once
* either the delay has expired or the socket operation is ready. It
* will be run with the DEFAULT priority.
- * Only allowed to be called as long as the scheduler is running
- * (#GNUNET_SCHEDULER_run or #GNUNET_SCHEDULER_run_with_driver has been
- * called and has not returned yet).
+ * Only allowed to be called as long as the scheduler is running, that
+ * is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param delay when should this operation time out?
* @param priority priority to use for the task
*/
struct GNUNET_SCHEDULER_Task *
GNUNET_SCHEDULER_add_read_net_with_priority (struct GNUNET_TIME_Relative delay,
- enum GNUNET_SCHEDULER_Priority priority,
- struct GNUNET_NETWORK_Handle *rfd,
- GNUNET_SCHEDULER_TaskCallback task,
+ enum GNUNET_SCHEDULER_Priority
+ priority,
+ struct GNUNET_NETWORK_Handle *rfd,
+ GNUNET_SCHEDULER_TaskCallback task,
void *task_cls)
{
return GNUNET_SCHEDULER_add_net_with_priority (delay, priority,
* scheduled for execution once either the delay has expired or the
* socket operation is ready. It will be run with the priority of
* the calling task.
- * Only allowed to be called as long as the scheduler is running
- * (#GNUNET_SCHEDULER_run or #GNUNET_SCHEDULER_run_with_driver has been
- * called and has not returned yet).
+ * Only allowed to be called as long as the scheduler is running, that
+ * is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param delay when should this operation time out?
* @param wfd write file-descriptor
task, task_cls);
}
+
/**
* Schedule a new task to be run with a specified delay or when the
* specified file descriptor is ready. The delay can be
* used as a timeout on the socket being ready. The task will be
* scheduled for execution once either the delay has expired or the
* socket operation is ready.
- * Only allowed to be called as long as the scheduler is running
- * (#GNUNET_SCHEDULER_run or #GNUNET_SCHEDULER_run_with_driver has been
- * called and has not returned yet).
+ * Only allowed to be called as long as the scheduler is running, that
+ * is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param delay when should this operation time out?
* @param priority priority of the task
* only valid until "task" is started!
*/
struct GNUNET_SCHEDULER_Task *
-GNUNET_SCHEDULER_add_net_with_priority (struct GNUNET_TIME_Relative delay,
- enum GNUNET_SCHEDULER_Priority priority,
- struct GNUNET_NETWORK_Handle *fd,
- int on_read,
- int on_write,
- GNUNET_SCHEDULER_TaskCallback task,
- void *task_cls)
+GNUNET_SCHEDULER_add_net_with_priority (struct GNUNET_TIME_Relative delay,
+ enum GNUNET_SCHEDULER_Priority priority,
+ struct GNUNET_NETWORK_Handle *fd,
+ int on_read,
+ int on_write,
+ GNUNET_SCHEDULER_TaskCallback task,
+ void *task_cls)
{
/* scheduler must be running */
GNUNET_assert (NULL != scheduler_driver);
-
-#if MINGW
- struct GNUNET_NETWORK_FDSet *s;
- struct GNUNET_SCHEDULER_Task * ret;
-
- GNUNET_assert (NULL != fd);
- s = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_set (s, fd);
- ret = GNUNET_SCHEDULER_add_select (
- priority, delay,
- on_read ? s : NULL,
- on_write ? s : NULL,
- task, task_cls);
- GNUNET_NETWORK_fdset_destroy (s);
- return ret;
-#else
GNUNET_assert (on_read || on_write);
GNUNET_assert (GNUNET_NETWORK_get_fd (fd) >= 0);
return add_without_sets (delay, priority,
NULL,
NULL,
task, task_cls);
-#endif
}
* used as a timeout on the socket being ready. The task will be
* scheduled for execution once either the delay has expired or the
* socket operation is ready. It will be run with the DEFAULT priority.
- * Only allowed to be called as long as the scheduler is running
- * (#GNUNET_SCHEDULER_run or #GNUNET_SCHEDULER_run_with_driver has been
- * called and has not returned yet).
+ * Only allowed to be called as long as the scheduler is running, that
+ * is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param delay when should this operation time out?
* @param rfd read file-descriptor
struct GNUNET_SCHEDULER_Task *
GNUNET_SCHEDULER_add_read_file (struct GNUNET_TIME_Relative delay,
const struct GNUNET_DISK_FileHandle *rfd,
- GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
+ GNUNET_SCHEDULER_TaskCallback task,
+ void *task_cls)
{
return GNUNET_SCHEDULER_add_file_with_priority (
- delay, GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- rfd, GNUNET_YES, GNUNET_NO,
- task, task_cls);
+ delay, GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ rfd, GNUNET_YES, GNUNET_NO,
+ task, task_cls);
}
* used as a timeout on the socket being ready. The task will be
* scheduled for execution once either the delay has expired or the
* socket operation is ready. It will be run with the DEFAULT priority.
- * Only allowed to be called as long as the scheduler is running
- * (#GNUNET_SCHEDULER_run or #GNUNET_SCHEDULER_run_with_driver has been
- * called and has not returned yet).
+ * Only allowed to be called as long as the scheduler is running, that
+ * is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param delay when should this operation time out?
* @param wfd write file-descriptor
struct GNUNET_SCHEDULER_Task *
GNUNET_SCHEDULER_add_write_file (struct GNUNET_TIME_Relative delay,
const struct GNUNET_DISK_FileHandle *wfd,
- GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
+ GNUNET_SCHEDULER_TaskCallback task,
+ void *task_cls)
{
return GNUNET_SCHEDULER_add_file_with_priority (
- delay, GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- wfd, GNUNET_NO, GNUNET_YES,
- task, task_cls);
+ delay, GNUNET_SCHEDULER_PRIORITY_DEFAULT,
+ wfd, GNUNET_NO, GNUNET_YES,
+ task, task_cls);
}
* used as a timeout on the socket being ready. The task will be
* scheduled for execution once either the delay has expired or the
* socket operation is ready.
- * Only allowed to be called as long as the scheduler is running
- * (#GNUNET_SCHEDULER_run or #GNUNET_SCHEDULER_run_with_driver has been
- * called and has not returned yet).
+ * Only allowed to be called as long as the scheduler is running, that
+ * is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param delay when should this operation time out?
* @param priority priority of the task
*/
struct GNUNET_SCHEDULER_Task *
GNUNET_SCHEDULER_add_file_with_priority (struct GNUNET_TIME_Relative delay,
- enum GNUNET_SCHEDULER_Priority priority,
- const struct GNUNET_DISK_FileHandle *fd,
+ enum GNUNET_SCHEDULER_Priority
+ priority,
+ const struct
+ GNUNET_DISK_FileHandle *fd,
int on_read, int on_write,
- GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
+ GNUNET_SCHEDULER_TaskCallback task,
+ void *task_cls)
{
/* scheduler must be running */
GNUNET_assert (NULL != scheduler_driver);
-
-#if MINGW
- struct GNUNET_NETWORK_FDSet *s;
- struct GNUNET_SCHEDULER_Task * ret;
-
- GNUNET_assert (NULL != fd);
- s = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_handle_set (s, fd);
- ret = GNUNET_SCHEDULER_add_select (
- priority, delay,
- on_read ? s : NULL,
- on_write ? s : NULL,
- task, task_cls);
- GNUNET_NETWORK_fdset_destroy (s);
- return ret;
-#else
GNUNET_assert (on_read || on_write);
GNUNET_assert (fd->fd >= 0);
return add_without_sets (delay, priority,
on_read ? fd : NULL,
on_write ? fd : NULL,
task, task_cls);
-#endif
}
void
-extract_handles (struct GNUNET_SCHEDULER_Task *t,
- const struct GNUNET_NETWORK_FDSet *fdset,
+extract_handles (const struct GNUNET_NETWORK_FDSet *fdset,
const struct GNUNET_NETWORK_Handle ***ntarget,
unsigned int *extracted_nhandles,
const struct GNUNET_DISK_FileHandle ***ftarget,
// in fdset must be handled separately
const struct GNUNET_NETWORK_Handle **nhandles;
const struct GNUNET_DISK_FileHandle **fhandles;
- unsigned int nhandles_len, fhandles_len;
- int sock;
+ unsigned int nhandles_len;
+ unsigned int fhandles_len;
nhandles = NULL;
fhandles = NULL;
nhandles_len = 0;
fhandles_len = 0;
- for (sock = 0; sock != fdset->nsds; ++sock)
+ for (int sock = 0; sock != fdset->nsds; ++sock)
{
if (GNUNET_YES == GNUNET_NETWORK_fdset_test_native (fdset, sock))
{
* || any-rs-ready
* || any-ws-ready) )
* </code>
- * Only allowed to be called as long as the scheduler is running
- * (#GNUNET_SCHEDULER_run or #GNUNET_SCHEDULER_run_with_driver has been
- * called and has not returned yet).
+ * Only allowed to be called as long as the scheduler is running, that
+ * is one of the following conditions is met:
+ *
+ * - #GNUNET_SCHEDULER_run has been called and has not returned yet
+ * - #GNUNET_SCHEDULER_driver_init has been run and
+ * #GNUNET_SCHEDULER_driver_done has not been called yet
*
* @param prio how important is this task?
* @param delay how long should we wait?
void *task_cls)
{
struct GNUNET_SCHEDULER_Task *t;
- const struct GNUNET_NETWORK_Handle **read_nhandles;
- const struct GNUNET_NETWORK_Handle **write_nhandles;
- const struct GNUNET_DISK_FileHandle **read_fhandles;
- const struct GNUNET_DISK_FileHandle **write_fhandles;
- unsigned int read_nhandles_len, write_nhandles_len,
- read_fhandles_len, write_fhandles_len;
-
- if (((NULL == rs) && (NULL == ws)) || ((0 == rs->nsds) && (0 == ws->nsds)))
- return GNUNET_SCHEDULER_add_delayed_with_priority (delay,
- prio,
- task,
- task_cls);
+ const struct GNUNET_NETWORK_Handle **read_nhandles = NULL;
+ const struct GNUNET_NETWORK_Handle **write_nhandles = NULL;
+ const struct GNUNET_DISK_FileHandle **read_fhandles = NULL;
+ const struct GNUNET_DISK_FileHandle **write_fhandles = NULL;
+ unsigned int read_nhandles_len = 0;
+ unsigned int write_nhandles_len = 0;
+ unsigned int read_fhandles_len = 0;
+ unsigned int write_fhandles_len = 0;
+
/* scheduler must be running */
GNUNET_assert (NULL != scheduler_driver);
- GNUNET_assert (NULL != active_task);
GNUNET_assert (NULL != task);
- t = GNUNET_new (struct GNUNET_SCHEDULER_Task);
- t->callback = task;
- t->callback_cls = task_cls;
- t->read_fd = -1;
- t->write_fd = -1;
- t->own_handles = GNUNET_YES;
- read_nhandles = NULL;
- write_nhandles = NULL;
- read_fhandles = NULL;
- write_fhandles = NULL;
- read_nhandles_len = 0;
- write_nhandles_len = 0;
- read_fhandles_len = 0;
- write_fhandles_len = 0;
- if (NULL != rs)
+ int no_rs = (NULL == rs);
+ int no_ws = (NULL == ws);
+ int empty_rs = (NULL != rs) && (0 == rs->nsds);
+ int empty_ws = (NULL != ws) && (0 == ws->nsds);
+ int no_fds = (no_rs && no_ws) ||
+ (empty_rs && empty_ws) ||
+ (no_rs && empty_ws) ||
+ (no_ws && empty_rs);
+ if (! no_fds)
{
- extract_handles (t,
- rs,
- &read_nhandles,
- &read_nhandles_len,
- &read_fhandles,
- &read_fhandles_len);
- }
- if (NULL != ws)
- {
- extract_handles (t,
- ws,
- &write_nhandles,
- &write_nhandles_len,
- &write_fhandles,
- &write_fhandles_len);
+ if (NULL != rs)
+ {
+ extract_handles (rs,
+ &read_nhandles,
+ &read_nhandles_len,
+ &read_fhandles,
+ &read_fhandles_len);
+ }
+ if (NULL != ws)
+ {
+ extract_handles (ws,
+ &write_nhandles,
+ &write_nhandles_len,
+ &write_fhandles,
+ &write_fhandles_len);
+ }
}
+ /**
+ * here we consider the case that a GNUNET_NETWORK_FDSet might be empty
+ * although its maximum FD number (nsds) is greater than 0. We handle
+ * this case gracefully because some libraries such as libmicrohttpd
+ * only provide a hint what the maximum FD number in an FD set might be
+ * and not the exact FD number (see e.g. gnunet-rest-service.c)
+ */int no_fds_extracted = (0 == read_nhandles_len) &&
+ (0 == read_fhandles_len) &&
+ (0 == write_nhandles_len) &&
+ (0 == write_fhandles_len);
+ if (no_fds || no_fds_extracted)
+ return GNUNET_SCHEDULER_add_delayed_with_priority (delay,
+ prio,
+ task,
+ task_cls);
+ t = GNUNET_new (struct GNUNET_SCHEDULER_Task);
+ GNUNET_async_scope_get (&t->scope);
init_fd_info (t,
read_nhandles,
read_nhandles_len,
read_fhandles_len,
write_fhandles,
write_fhandles_len);
+ t->callback = task;
+ t->callback_cls = task_cls;
+ t->own_handles = GNUNET_YES;
/* free the arrays of pointers to network / file handles, the actual
* handles will be freed in destroy_task */
GNUNET_array_grow (read_nhandles, read_nhandles_len, 0);
#endif
t->timeout = GNUNET_TIME_relative_to_absolute (delay);
t->priority =
- check_priority ((prio ==
- GNUNET_SCHEDULER_PRIORITY_KEEP) ? current_priority :
- prio);
+ check_priority ((prio ==
+ GNUNET_SCHEDULER_PRIORITY_KEEP) ? current_priority :
+ prio);
t->lifeness = current_lifeness;
GNUNET_CONTAINER_DLL_insert (pending_head,
pending_tail,
t);
- driver_add_multiple (t, GNUNET_SCHEDULER_ET_NONE);
+ driver_add_multiple (t);
max_priority_added = GNUNET_MAX (max_priority_added,
- t->priority);
+ t->priority);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Adding task %p\n",
t);
struct GNUNET_SCHEDULER_FdInfo *fdi)
{
enum GNUNET_SCHEDULER_Reason reason;
- struct GNUNET_TIME_Absolute now;
- now = GNUNET_TIME_absolute_get ();
reason = task->reason;
- if (now.abs_value_us >= task->timeout.abs_value_us)
- reason |= GNUNET_SCHEDULER_REASON_TIMEOUT;
- if ( (0 == (reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
- (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et)) )
+ if ((0 == (reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
+ (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et)))
reason |= GNUNET_SCHEDULER_REASON_READ_READY;
- if ( (0 == (reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
- (0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et)) )
+ if ((0 == (reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
+ (0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et)))
reason |= GNUNET_SCHEDULER_REASON_WRITE_READY;
reason |= GNUNET_SCHEDULER_REASON_PREREQ_DONE;
task->reason = reason;
/**
- * Function called by the driver to tell the scheduler to run some of
- * the tasks that are ready. This function may return even though
- * there are tasks left to run just to give other tasks a chance as
- * well. If we return #GNUNET_YES, the driver should call this
- * function again as soon as possible, while if we return #GNUNET_NO
- * it must block until either the operating system has more work (the
- * scheduler has no more work to do right now) or the timeout set by
- * the scheduler (using the set_wakeup callback) is reached.
+ * Function called by external event loop implementations to tell the
+ * scheduler to run some of the tasks that are ready. Must be called
+ * only after #GNUNET_SCHEDULER_driver_init has been called and before
+ * #GNUNET_SCHEDULER_driver_done is called.
+ * This function may return even though there are tasks left to run
+ * just to give other tasks a chance as well. If we return #GNUNET_YES,
+ * the event loop implementation should call this function again as
+ * soon as possible, while if we return #GNUNET_NO it must block until
+ * either the operating system has more work (the scheduler has no more
+ * work to do right now) or the timeout set by the scheduler (using the
+ * set_wakeup callback) is reached.
*
- * @param sh scheduler handle that was given to the `loop`
- * @return #GNUNET_OK if there are more tasks that are ready,
- * and thus we would like to run more (yield to avoid
- * blocking other activities for too long)
- * #GNUNET_NO if we are done running tasks (yield to block)
- * #GNUNET_SYSERR on error, e.g. no tasks were ready
+ * @param sh scheduler handle that was returned by
+ * #GNUNET_SCHEDULER_driver_init
+ * @return #GNUNET_YES if there are more tasks that are ready,
+ * and thus we would like to run more (yield to avoid
+ * blocking other activities for too long) #GNUNET_NO
+ * if we are done running tasks (yield to block)
*/
int
-GNUNET_SCHEDULER_run_from_driver (struct GNUNET_SCHEDULER_Handle *sh)
+GNUNET_SCHEDULER_do_work (struct GNUNET_SCHEDULER_Handle *sh)
{
enum GNUNET_SCHEDULER_Priority p;
struct GNUNET_SCHEDULER_Task *pos;
/* check for tasks that reached the timeout! */
now = GNUNET_TIME_absolute_get ();
- while (NULL != (pos = pending_timeout_head))
+ pos = pending_timeout_head;
+ while (NULL != pos)
{
+ struct GNUNET_SCHEDULER_Task *next = pos->next;
if (now.abs_value_us >= pos->timeout.abs_value_us)
pos->reason |= GNUNET_SCHEDULER_REASON_TIMEOUT;
if (0 == pos->reason)
if (pending_timeout_last == pos)
pending_timeout_last = NULL;
queue_ready_task (pos);
+ pos = next;
}
pos = pending_head;
while (NULL != pos)
if (0 == ready_count)
{
- LOG (GNUNET_ERROR_TYPE_ERROR,
- "GNUNET_SCHEDULER_run_from_driver was called, but no tasks are ready!\n");
- return GNUNET_SYSERR;
- }
+ struct GNUNET_TIME_Absolute timeout = get_timeout ();
- /* find out which task priority level we are going to
- process this time */
- max_priority_added = GNUNET_SCHEDULER_PRIORITY_KEEP;
- GNUNET_assert (NULL == ready_head[GNUNET_SCHEDULER_PRIORITY_KEEP]);
- /* yes, p>0 is correct, 0 is "KEEP" which should
- * always be an empty queue (see assertion)! */
- for (p = GNUNET_SCHEDULER_PRIORITY_COUNT - 1; p > 0; p--)
- {
- pos = ready_head[p];
- if (NULL != pos)
- break;
+ if (timeout.abs_value_us > now.abs_value_us)
+ {
+ /**
+ * The event loop called this function before the current timeout was
+ * reached (and no FD tasks are ready). This is acceptable if
+ *
+ * - the system time was changed while the driver was waiting for
+ * the timeout
+ * - an external event loop called GNUnet API functions outside of
+ * the callbacks called in GNUNET_SCHEDULER_do_work and thus
+ * wasn't notified about the new timeout
+ *
+ * It might also mean we are busy-waiting because of a programming
+ * error in the external event loop.
+ */LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "GNUNET_SCHEDULER_do_work did not find any ready "
+ "tasks and timeout has not been reached yet.\n");
+ }
+ else
+ {
+ /**
+ * the current timeout was reached but no ready tasks were found,
+ * internal scheduler error!
+ */
+ GNUNET_assert (0);
+ }
}
- GNUNET_assert (NULL != pos); /* ready_count wrong? */
-
- /* process all tasks at this priority level, then yield */
- while (NULL != (pos = ready_head[p]))
+ else
{
- GNUNET_CONTAINER_DLL_remove (ready_head[p],
- ready_tail[p],
- pos);
- ready_count--;
- current_priority = pos->priority;
- current_lifeness = pos->lifeness;
- active_task = pos;
-#if PROFILE_DELAYS
- if (GNUNET_TIME_absolute_get_duration (pos->start_time).rel_value_us >
- DELAY_THRESHOLD.rel_value_us)
+ /* find out which task priority level we are going to
+ process this time */
+ max_priority_added = GNUNET_SCHEDULER_PRIORITY_KEEP;
+ GNUNET_assert (NULL == ready_head[GNUNET_SCHEDULER_PRIORITY_KEEP]);
+ /* yes, p>0 is correct, 0 is "KEEP" which should
+ * always be an empty queue (see assertion)! */
+ for (p = GNUNET_SCHEDULER_PRIORITY_COUNT - 1; p > 0; p--)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Task %p took %s to be scheduled\n",
- pos,
- GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_duration (pos->start_time),
- GNUNET_YES));
+ pos = ready_head[p];
+ if (NULL != pos)
+ break;
}
-#endif
- tc.reason = pos->reason;
- GNUNET_NETWORK_fdset_zero (sh->rs);
- GNUNET_NETWORK_fdset_zero (sh->ws);
- // FIXME: do we have to remove FdInfos from fds if they are not ready?
- tc.fds_len = pos->fds_len;
- tc.fds = pos->fds;
- for (int i = 0; i != pos->fds_len; ++i)
+ GNUNET_assert (NULL != pos); /* ready_count wrong? */
+
+ /* process all tasks at this priority level, then yield */
+ while (NULL != (pos = ready_head[p]))
{
- struct GNUNET_SCHEDULER_FdInfo *fdi = &pos->fds[i];
- if (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et))
+ GNUNET_CONTAINER_DLL_remove (ready_head[p],
+ ready_tail[p],
+ pos);
+ ready_count--;
+ current_priority = pos->priority;
+ current_lifeness = pos->lifeness;
+ active_task = pos;
+#if PROFILE_DELAYS
+ if (GNUNET_TIME_absolute_get_duration (pos->start_time).rel_value_us >
+ DELAY_THRESHOLD.rel_value_us)
{
- GNUNET_NETWORK_fdset_set_native (sh->rs,
- fdi->sock);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Task %p took %s to be scheduled\n",
+ pos,
+ GNUNET_STRINGS_relative_time_to_string (
+ GNUNET_TIME_absolute_get_duration (pos->start_time),
+ GNUNET_YES));
}
- if (0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et))
+#endif
+ tc.reason = pos->reason;
+ GNUNET_NETWORK_fdset_zero (sh->rs);
+ GNUNET_NETWORK_fdset_zero (sh->ws);
+ // FIXME: do we have to remove FdInfos from fds if they are not ready?
+ tc.fds_len = pos->fds_len;
+ tc.fds = pos->fds;
+ for (unsigned int i = 0; i != pos->fds_len; ++i)
{
- GNUNET_NETWORK_fdset_set_native (sh->ws,
- fdi->sock);
+ struct GNUNET_SCHEDULER_FdInfo *fdi = &pos->fds[i];
+ if (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et))
+ {
+ GNUNET_NETWORK_fdset_set_native (sh->rs,
+ fdi->sock);
+ }
+ if (0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et))
+ {
+ GNUNET_NETWORK_fdset_set_native (sh->ws,
+ fdi->sock);
+ }
}
- }
- tc.read_ready = sh->rs;
- tc.write_ready = sh->ws;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Running task %p\n",
- pos);
- GNUNET_assert (NULL != pos->callback);
- pos->callback (pos->callback_cls);
- if (NULL != pos->fds)
- {
- int del_result = scheduler_driver->del (scheduler_driver->cls, pos);
- if (GNUNET_OK != del_result)
+ tc.read_ready = sh->rs;
+ tc.write_ready = sh->ws;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Running task %p\n",
+ pos);
+ GNUNET_assert (NULL != pos->callback);
{
- LOG (GNUNET_ERROR_TYPE_ERROR,
- "driver could not delete task\n");
- GNUNET_assert (0);
+ struct GNUNET_AsyncScopeSave old_scope;
+ if (pos->scope.have_scope)
+ GNUNET_async_scope_enter (&pos->scope.scope_id, &old_scope);
+ else
+ GNUNET_async_scope_get (&old_scope);
+ pos->callback (pos->callback_cls);
+ GNUNET_async_scope_restore (&old_scope);
}
+ if (NULL != pos->fds)
+ {
+ int del_result = scheduler_driver->del (scheduler_driver->cls, pos);
+ if (GNUNET_OK != del_result)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ "driver could not delete task %p\n", pos);
+ GNUNET_assert (0);
+ }
+ }
+ active_task = NULL;
+ dump_backtrace (pos);
+ destroy_task (pos);
}
- active_task = NULL;
- dump_backtrace (pos);
- destroy_task (pos);
- tasks_run++;
}
shutdown_if_no_lifeness ();
if (0 == ready_count)
return GNUNET_NO;
}
scheduler_driver->set_wakeup (scheduler_driver->cls,
- GNUNET_TIME_absolute_get ());
- return GNUNET_OK;
+ GNUNET_TIME_absolute_get ());
+ return GNUNET_YES;
}
/**
- * Initialize and run scheduler. This function will return when all
- * tasks have completed. On systems with signals, receiving a SIGTERM
- * (and other similar signals) will cause #GNUNET_SCHEDULER_shutdown
- * to be run after the active task is complete. As a result, SIGTERM
- * causes all shutdown tasks to be scheduled with reason
- * #GNUNET_SCHEDULER_REASON_SHUTDOWN. (However, tasks added
- * afterwards will execute normally!). Note that any particular
- * signal will only shut down one scheduler; applications should
- * always only create a single scheduler.
+ * Function called by external event loop implementations to initialize
+ * the scheduler. An external implementation has to provide @a driver
+ * which contains callbacks for the scheduler (see definition of struct
+ * #GNUNET_SCHEDULER_Driver). The callbacks are used to instruct the
+ * external implementation to watch for events. If it detects any of
+ * those events it is expected to call #GNUNET_SCHEDULER_do_work to let
+ * the scheduler handle it. If an event is related to a specific task
+ * (e.g. the scheduler gave instructions to watch a file descriptor),
+ * the external implementation is expected to mark that task ready
+ * before by calling #GNUNET_SCHEDULER_task_ready.
+
+ * This function has to be called before any tasks are scheduled and
+ * before GNUNET_SCHEDULER_do_work is called for the first time. It
+ * allocates resources that have to be freed again by calling
+ * #GNUNET_SCHEDULER_driver_done.
*
- * @param driver drive to use for the event loop
- * @param task task to run first (and immediately)
- * @param task_cls closure of @a task
- * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
+ * This function installs the same signal handlers as
+ * #GNUNET_SCHEDULER_run. This means SIGTERM (and other similar signals)
+ * will induce a call to #GNUNET_SCHEDULER_shutdown during the next
+ * call to #GNUNET_SCHEDULER_do_work. As a result, SIGTERM causes all
+ * active tasks to be scheduled with reason
+ * #GNUNET_SCHEDULER_REASON_SHUTDOWN. (However, tasks added afterwards
+ * will execute normally!). Note that any particular signal will only
+ * shut down one scheduler; applications should always only create a
+ * single scheduler.
+ *
+ * @param driver to use for the event loop
+ * @return handle to be passed to #GNUNET_SCHEDULER_do_work and
+ * #GNUNET_SCHEDULER_driver_done
*/
-int
-GNUNET_SCHEDULER_run_with_driver (const struct GNUNET_SCHEDULER_Driver *driver,
- GNUNET_SCHEDULER_TaskCallback task,
- void *task_cls)
+struct GNUNET_SCHEDULER_Handle *
+GNUNET_SCHEDULER_driver_init (const struct GNUNET_SCHEDULER_Driver *driver)
{
- int ret;
- struct GNUNET_SIGNAL_Context *shc_int;
- struct GNUNET_SIGNAL_Context *shc_term;
-#if (SIGTERM != GNUNET_TERM_SIG)
- struct GNUNET_SIGNAL_Context *shc_gterm;
-#endif
-#ifndef MINGW
- struct GNUNET_SIGNAL_Context *shc_quit;
- struct GNUNET_SIGNAL_Context *shc_hup;
- struct GNUNET_SIGNAL_Context *shc_pipe;
-#endif
- struct GNUNET_SCHEDULER_Task tsk;
+ struct GNUNET_SCHEDULER_Handle *sh;
const struct GNUNET_DISK_FileHandle *pr;
- /* general set-up */
- GNUNET_assert (NULL == active_task);
+ /* scheduler must not be running */
+ GNUNET_assert (NULL == scheduler_driver);
GNUNET_assert (NULL == shutdown_pipe_handle);
+ /* general set-up */
+ sh = GNUNET_new (struct GNUNET_SCHEDULER_Handle);
shutdown_pipe_handle = GNUNET_DISK_pipe (GNUNET_NO,
GNUNET_NO,
GNUNET_NO,
/* install signal handlers */
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Registering signal handlers\n");
- shc_int = GNUNET_SIGNAL_handler_install (SIGINT,
- &sighandler_shutdown);
- shc_term = GNUNET_SIGNAL_handler_install (SIGTERM,
- &sighandler_shutdown);
+ sh->shc_int = GNUNET_SIGNAL_handler_install (SIGINT,
+ &sighandler_shutdown);
+ sh->shc_term = GNUNET_SIGNAL_handler_install (SIGTERM,
+ &sighandler_shutdown);
#if (SIGTERM != GNUNET_TERM_SIG)
- shc_gterm = GNUNET_SIGNAL_handler_install (GNUNET_TERM_SIG,
- &sighandler_shutdown);
-#endif
-#ifndef MINGW
- shc_pipe = GNUNET_SIGNAL_handler_install (SIGPIPE,
- &sighandler_pipe);
- shc_quit = GNUNET_SIGNAL_handler_install (SIGQUIT,
- &sighandler_shutdown);
- shc_hup = GNUNET_SIGNAL_handler_install (SIGHUP,
- &sighandler_shutdown);
+ sh->shc_gterm = GNUNET_SIGNAL_handler_install (GNUNET_TERM_SIG,
+ &sighandler_shutdown);
#endif
+ sh->shc_pipe = GNUNET_SIGNAL_handler_install (SIGPIPE,
+ &sighandler_pipe);
+ sh->shc_quit = GNUNET_SIGNAL_handler_install (SIGQUIT,
+ &sighandler_shutdown);
+ sh->shc_hup = GNUNET_SIGNAL_handler_install (SIGHUP,
+ &sighandler_shutdown);
/* Setup initial tasks */
current_priority = GNUNET_SCHEDULER_PRIORITY_DEFAULT;
current_lifeness = GNUNET_NO;
- memset (&tsk,
- 0,
- sizeof (tsk));
- active_task = &tsk;
- GNUNET_SCHEDULER_add_now (&GNUNET_OS_install_parent_control_handler,
- NULL);
- GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
- pr,
- &shutdown_cb,
- NULL);
+ install_parent_control_task =
+ GNUNET_SCHEDULER_add_now (&install_parent_control_handler,
+ NULL);
+ shutdown_pipe_task =
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ pr,
+ &shutdown_pipe_cb,
+ NULL);
current_lifeness = GNUNET_YES;
- GNUNET_SCHEDULER_add_with_reason_and_priority (task,
- task_cls,
- GNUNET_SCHEDULER_REASON_STARTUP,
- GNUNET_SCHEDULER_PRIORITY_DEFAULT);
- active_task = NULL;
scheduler_driver->set_wakeup (scheduler_driver->cls,
get_timeout ());
/* begin main event loop */
- sh.rs = GNUNET_NETWORK_fdset_create ();
- sh.ws = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_handle_set (sh.rs, pr);
- ret = driver->loop (driver->cls,
- &sh);
- GNUNET_NETWORK_fdset_destroy (sh.rs);
- GNUNET_NETWORK_fdset_destroy (sh.ws);
-
- /* uninstall signal handlers */
- GNUNET_SIGNAL_handler_uninstall (shc_int);
- GNUNET_SIGNAL_handler_uninstall (shc_term);
-#if (SIGTERM != GNUNET_TERM_SIG)
- GNUNET_SIGNAL_handler_uninstall (shc_gterm);
-#endif
-#ifndef MINGW
- GNUNET_SIGNAL_handler_uninstall (shc_pipe);
- GNUNET_SIGNAL_handler_uninstall (shc_quit);
- GNUNET_SIGNAL_handler_uninstall (shc_hup);
-#endif
- GNUNET_DISK_pipe_close (shutdown_pipe_handle);
- shutdown_pipe_handle = NULL;
- scheduler_driver = NULL;
- return ret;
+ sh->rs = GNUNET_NETWORK_fdset_create ();
+ sh->ws = GNUNET_NETWORK_fdset_create ();
+ GNUNET_NETWORK_fdset_handle_set (sh->rs, pr);
+ return sh;
}
-int
-select_add (void *cls,
- struct GNUNET_SCHEDULER_Task *task,
- struct GNUNET_SCHEDULER_FdInfo *fdi)
+/**
+ * Counter-part of #GNUNET_SCHEDULER_driver_init. Has to be called
+ * by external event loop implementations after the scheduler has
+ * shut down. This is the case if both of the following conditions
+ * are met:
+ *
+ * - all tasks the scheduler has added through the driver's add
+ * callback have been removed again through the driver's del
+ * callback
+ * - the timeout the scheduler has set through the driver's
+ * add_wakeup callback is FOREVER
+ *
+ * @param sh the handle returned by #GNUNET_SCHEDULER_driver_init
+ */
+void
+GNUNET_SCHEDULER_driver_done (struct GNUNET_SCHEDULER_Handle *sh)
{
- struct DriverContext *context = cls;
- GNUNET_assert (NULL != context);
- GNUNET_assert (NULL != task);
- GNUNET_assert (NULL != fdi);
- GNUNET_assert (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et) ||
- 0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et));
-
- if (!((NULL != fdi->fd) ^ (NULL != fdi->fh)) || (fdi->sock < 0))
+ GNUNET_assert (NULL == pending_head);
+ GNUNET_assert (NULL == pending_timeout_head);
+ GNUNET_assert (NULL == shutdown_head);
+ for (int i = 0; i != GNUNET_SCHEDULER_PRIORITY_COUNT; ++i)
{
- /* exactly one out of {fd, hf} must be != NULL and the OS handle must be valid */
- return GNUNET_SYSERR;
+ GNUNET_assert (NULL == ready_head[i]);
}
+ GNUNET_NETWORK_fdset_destroy (sh->rs);
+ GNUNET_NETWORK_fdset_destroy (sh->ws);
- struct Scheduled *scheduled = GNUNET_new (struct Scheduled);
- scheduled->task = task;
- scheduled->fdi = fdi;
- scheduled->et = fdi->et;
-
- GNUNET_CONTAINER_DLL_insert (context->scheduled_head,
- context->scheduled_tail,
- scheduled);
- return GNUNET_OK;
+ /* uninstall signal handlers */
+ GNUNET_SIGNAL_handler_uninstall (sh->shc_int);
+ GNUNET_SIGNAL_handler_uninstall (sh->shc_term);
+#if (SIGTERM != GNUNET_TERM_SIG)
+ GNUNET_SIGNAL_handler_uninstall (sh->shc_gterm);
+#endif
+ GNUNET_SIGNAL_handler_uninstall (sh->shc_pipe);
+ GNUNET_SIGNAL_handler_uninstall (sh->shc_quit);
+ GNUNET_SIGNAL_handler_uninstall (sh->shc_hup);
+ GNUNET_DISK_pipe_close (shutdown_pipe_handle);
+ shutdown_pipe_handle = NULL;
+ scheduler_driver = NULL;
+ GNUNET_free (sh);
}
-int
-select_del (void *cls,
- struct GNUNET_SCHEDULER_Task *task)
-{
- struct DriverContext *context;
- struct Scheduled *pos;
- int ret;
-
- GNUNET_assert (NULL != cls);
-
- context = cls;
- ret = GNUNET_SYSERR;
- pos = context->scheduled_head;
- while (NULL != pos)
- {
- struct Scheduled *next = pos->next;
- if (pos->task == task)
- {
- GNUNET_CONTAINER_DLL_remove (context->scheduled_head,
- context->scheduled_tail,
- pos);
- GNUNET_free (pos);
- ret = GNUNET_OK;
- }
- pos = next;
- }
- return ret;
-}
-
-
-int
-select_loop (void *cls,
- struct GNUNET_SCHEDULER_Handle *sh)
+static int
+select_loop (struct GNUNET_SCHEDULER_Handle *sh,
+ struct DriverContext *context)
{
struct GNUNET_NETWORK_FDSet *rs;
struct GNUNET_NETWORK_FDSet *ws;
- struct DriverContext *context;
int select_result;
- int tasks_ready;
-
- context = cls;
+
GNUNET_assert (NULL != context);
rs = GNUNET_NETWORK_fdset_create ();
ws = GNUNET_NETWORK_fdset_create ();
- tasks_ready = GNUNET_NO;
- while (NULL != context->scheduled_head ||
- GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us != context->timeout.rel_value_us)
+ while ((NULL != context->scheduled_head) ||
+ (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us !=
+ context->timeout.abs_value_us))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"select timeout = %s\n",
- GNUNET_STRINGS_relative_time_to_string (context->timeout, GNUNET_NO));
+ GNUNET_STRINGS_absolute_time_to_string (context->timeout));
GNUNET_NETWORK_fdset_zero (rs);
GNUNET_NETWORK_fdset_zero (ws);
- struct Scheduled *pos;
- for (pos = context->scheduled_head; NULL != pos; pos = pos->next)
+
+ for (struct Scheduled *pos = context->scheduled_head;
+ NULL != pos;
+ pos = pos->next)
{
if (0 != (GNUNET_SCHEDULER_ET_IN & pos->et))
{
GNUNET_NETWORK_fdset_set_native (ws, pos->fdi->sock);
}
}
+ struct GNUNET_TIME_Relative time_remaining =
+ GNUNET_TIME_absolute_get_remaining (context->timeout);
if (NULL == scheduler_select)
{
select_result = GNUNET_NETWORK_socket_select (rs,
ws,
NULL,
- context->timeout);
+ time_remaining);
}
else
{
rs,
ws,
NULL,
- context->timeout);
+ time_remaining);
}
if (select_result == GNUNET_SYSERR)
{
if (errno == EINTR)
continue;
- LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "select");
-#ifndef MINGW
+ LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR,
+ "select");
#if USE_LSOF
char lsof[512];
- snprintf (lsof, sizeof (lsof), "lsof -p %d", getpid ());
+ snprintf (lsof,
+ sizeof(lsof),
+ "lsof -p %d",
+ getpid ());
(void) close (1);
(void) dup2 (2, 1);
if (0 != system (lsof))
LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
"system");
#endif
-#endif
#if DEBUG_FDS
- struct Scheduled *s;
- for (s = context->scheduled_head; NULL != s; s = s->next)
+ for (struct Scheduled *s = context->scheduled_head;
+ NULL != s;
+ s = s->next)
{
- int flags = fcntl (s->fdi->sock, F_GETFD);
- if ((flags == -1) && (errno == EBADF))
+ int flags = fcntl (s->fdi->sock,
+ F_GETFD);
+
+ if ((flags == -1) &&
+ (EBADF == errno))
{
LOG (GNUNET_ERROR_TYPE_ERROR,
"Got invalid file descriptor %d!\n",
s->fdi->sock);
+#if EXECINFO
+ dump_backtrace (s->task);
+#endif
}
}
#endif
GNUNET_assert (0);
+ GNUNET_NETWORK_fdset_destroy (rs);
+ GNUNET_NETWORK_fdset_destroy (ws);
return GNUNET_SYSERR;
}
- for (pos = context->scheduled_head; NULL != pos; pos = pos->next)
+ if (select_result > 0)
{
- int is_ready = GNUNET_NO;
- if (0 != (GNUNET_SCHEDULER_ET_IN & pos->et) &&
- GNUNET_YES == GNUNET_NETWORK_fdset_test_native (rs, pos->fdi->sock))
- {
- pos->fdi->et |= GNUNET_SCHEDULER_ET_IN;
- is_ready = GNUNET_YES;
- }
- if (0 != (GNUNET_SCHEDULER_ET_OUT & pos->et) &&
- GNUNET_YES == GNUNET_NETWORK_fdset_test_native (ws, pos->fdi->sock))
- {
- pos->fdi->et |= GNUNET_SCHEDULER_ET_OUT;
- is_ready = GNUNET_YES;
- }
- if (GNUNET_YES == is_ready)
+ for (struct Scheduled *pos = context->scheduled_head;
+ NULL != pos;
+ pos = pos->next)
{
- GNUNET_SCHEDULER_task_ready (pos->task, pos->fdi);
+ int is_ready = GNUNET_NO;
+
+ if ((0 != (GNUNET_SCHEDULER_ET_IN & pos->et)) &&
+ (GNUNET_YES ==
+ GNUNET_NETWORK_fdset_test_native (rs,
+ pos->fdi->sock)) )
+ {
+ pos->fdi->et |= GNUNET_SCHEDULER_ET_IN;
+ is_ready = GNUNET_YES;
+ }
+ if ((0 != (GNUNET_SCHEDULER_ET_OUT & pos->et)) &&
+ (GNUNET_YES ==
+ GNUNET_NETWORK_fdset_test_native (ws,
+ pos->fdi->sock)) )
+ {
+ pos->fdi->et |= GNUNET_SCHEDULER_ET_OUT;
+ is_ready = GNUNET_YES;
+ }
+ if (GNUNET_YES == is_ready)
+ {
+ GNUNET_SCHEDULER_task_ready (pos->task,
+ pos->fdi);
+ }
}
}
- tasks_ready = GNUNET_SCHEDULER_run_from_driver (sh);
- GNUNET_assert (GNUNET_SYSERR != tasks_ready);
+ if (GNUNET_YES == GNUNET_SCHEDULER_do_work (sh))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "scheduler has more tasks ready!\n");
+ }
}
- return GNUNET_OK;
+ GNUNET_NETWORK_fdset_destroy (rs);
+ GNUNET_NETWORK_fdset_destroy (ws);
+ return GNUNET_OK;
}
-void
-select_set_wakeup(void *cls,
- struct GNUNET_TIME_Absolute dt)
+static int
+select_add (void *cls,
+ struct GNUNET_SCHEDULER_Task *task,
+ struct GNUNET_SCHEDULER_FdInfo *fdi)
+{
+ struct DriverContext *context = cls;
+
+ GNUNET_assert (NULL != context);
+ GNUNET_assert (NULL != task);
+ GNUNET_assert (NULL != fdi);
+ GNUNET_assert (0 != (GNUNET_SCHEDULER_ET_IN & fdi->et) ||
+ 0 != (GNUNET_SCHEDULER_ET_OUT & fdi->et));
+
+ if (! ((NULL != fdi->fd) ^ (NULL != fdi->fh)) || (fdi->sock < 0))
+ {
+ /* exactly one out of {fd, hf} must be != NULL and the OS handle must be valid */
+ return GNUNET_SYSERR;
+ }
+
+ struct Scheduled *scheduled = GNUNET_new (struct Scheduled);
+ scheduled->task = task;
+ scheduled->fdi = fdi;
+ scheduled->et = fdi->et;
+
+ GNUNET_CONTAINER_DLL_insert (context->scheduled_head,
+ context->scheduled_tail,
+ scheduled);
+ return GNUNET_OK;
+}
+
+
+static int
+select_del (void *cls,
+ struct GNUNET_SCHEDULER_Task *task)
+{
+ struct DriverContext *context;
+ struct Scheduled *pos;
+ int ret;
+
+ GNUNET_assert (NULL != cls);
+
+ context = cls;
+ ret = GNUNET_SYSERR;
+ pos = context->scheduled_head;
+ while (NULL != pos)
+ {
+ struct Scheduled *next = pos->next;
+ if (pos->task == task)
+ {
+ GNUNET_CONTAINER_DLL_remove (context->scheduled_head,
+ context->scheduled_tail,
+ pos);
+ GNUNET_free (pos);
+ ret = GNUNET_OK;
+ }
+ pos = next;
+ }
+ return ret;
+}
+
+
+static void
+select_set_wakeup (void *cls,
+ struct GNUNET_TIME_Absolute dt)
{
struct DriverContext *context = cls;
+
GNUNET_assert (NULL != context);
-
- context->timeout = GNUNET_TIME_absolute_get_remaining (dt);
+ context->timeout = dt;
}
GNUNET_SCHEDULER_driver_select ()
{
struct GNUNET_SCHEDULER_Driver *select_driver;
+
select_driver = GNUNET_new (struct GNUNET_SCHEDULER_Driver);
- select_driver->loop = &select_loop;
select_driver->add = &select_add;
select_driver->del = &select_del;
select_driver->set_wakeup = &select_set_wakeup;
}
+/**
+ * Change the async scope for the currently executing task and (transitively)
+ * for all tasks scheduled by the current task after calling this function.
+ * Nested tasks can begin their own nested async scope.
+ *
+ * Once the current task is finished, the async scope ID is reset to
+ * its previous value.
+ *
+ * Must only be called from a running task.
+ *
+ * @param aid the asynchronous scope id to enter
+ */
+void
+GNUNET_SCHEDULER_begin_async_scope (struct GNUNET_AsyncScopeId *aid)
+{
+ struct GNUNET_AsyncScopeSave dummy_old_scope;
+
+ GNUNET_assert (NULL != active_task);
+ /* Since we're in a task, the context will be automatically
+ restored by the scheduler. */
+ GNUNET_async_scope_enter (aid, &dummy_old_scope);
+}
+
+
/* end of scheduler.c */
projects / oweals / gnunet.git / blobdiff