*/
#include "platform.h"
#include "gnunet_common.h"
+#include "gnunet_os_lib.h"
#include "gnunet_scheduler_lib.h"
#include "gnunet_signal_lib.h"
#include "gnunet_time_lib.h"
+#include "disk.h"
+#ifdef LINUX
+#include "execinfo.h"
+
+
+/**
+ * Use lsof to generate file descriptor reports on select error?
+ * (turn off for stable releases).
+ */
+#define USE_LSOF GNUNET_YES
+
+/**
+ * Obtain trace information for all scheduler calls that schedule tasks.
+ */
+#define EXECINFO GNUNET_NO
+
+/**
+ * Depth of the traces collected via EXECINFO.
+ */
+#define MAX_TRACE_DEPTH 50
+#endif
#define DEBUG_TASKS GNUNET_NO
+/**
+ * Should we figure out which tasks are delayed for a while
+ * before they are run? (Consider using in combination with EXECINFO).
+ */
+#define PROFILE_DELAYS GNUNET_NO
+
+/**
+ * Task that were in the queue for longer than this are reported if
+ * PROFILE_DELAYS is active.
+ */
+#define DELAY_THRESHOLD GNUNET_TIME_UNIT_SECONDS
+
/**
* Linked list of pending tasks.
*/
struct GNUNET_NETWORK_FDSet *read_set;
/**
- * Set of file descriptors this task is waiting
- * for for writing. Once ready, this is updated
- * to reflect the set of file descriptors ready
- * for operation.
+ * Set of file descriptors this task is waiting for for writing.
+ * Once ready, this is updated to reflect the set of file
+ * descriptors ready for operation.
*/
struct GNUNET_NETWORK_FDSet *write_set;
*/
struct GNUNET_TIME_Absolute timeout;
+#if PROFILE_DELAYS
+ /**
+ * When was the task scheduled?
+ */
+ struct GNUNET_TIME_Absolute start_time;
+#endif
+
/**
* Why is the task ready? Set after task is added to ready queue.
* Initially set to zero. All reasons that have already been
enum GNUNET_SCHEDULER_Priority priority;
/**
- * Should this task be run on shutdown?
+ * Set if we only wait for reading from a single FD, otherwise -1.
*/
- int run_on_shutdown;
-
-};
-
-
-/**
- * Handle for the scheduling service.
- */
-struct GNUNET_SCHEDULER_Handle
-{
+ int read_fd;
/**
- * List of tasks waiting for an event.
+ * Set if we only wait for writing to a single FD, otherwise -1.
*/
- struct Task *pending;
+ int write_fd;
+#if EXECINFO
/**
- * List of tasks ready to run right now,
- * grouped by importance.
+ * Array of strings which make up a backtrace from the point when this
+ * task was scheduled (essentially, who scheduled the task?)
*/
- struct Task *ready[GNUNET_SCHEDULER_PRIORITY_COUNT];
+ char **backtrace_strings;
/**
- * Identity of the last task queued. Incremented for each task to
- * generate a unique task ID (it is virtually impossible to start
- * more than 2^64 tasks during the lifetime of a process).
+ * Size of the backtrace_strings array
*/
- GNUNET_SCHEDULER_TaskIdentifier last_id;
+ int num_backtrace_strings;
+#endif
- /**
- * Highest number so that all tasks with smaller identifiers
- * have already completed. Also the lowest number of a task
- * still waiting to be executed.
- */
- GNUNET_SCHEDULER_TaskIdentifier lowest_pending_id;
- /**
- * GNUNET_NO if we are running normally,
- * GNUNET_YES if we are in shutdown mode.
- */
- int shutdown;
+};
- /**
- * Number of tasks on the ready list.
- */
- unsigned int ready_count;
- /**
- * How many tasks have we run so far?
- */
- unsigned long long tasks_run;
+/**
+ * List of tasks waiting for an event.
+ */
+static struct Task *pending;
- /**
- * Priority of the task running right now. Only
- * valid while a task is running.
- */
- enum GNUNET_SCHEDULER_Priority current_priority;
+/**
+ * List of tasks waiting ONLY for a timeout event.
+ * Sorted by timeout (earliest first). Used so that
+ * we do not traverse the list of these tasks when
+ * building select sets (we just look at the head
+ * to determine the respective timeout ONCE).
+ */
+static struct Task *pending_timeout;
-};
+/**
+ * Last inserted task waiting ONLY for a timeout event.
+ * Used to (heuristically) speed up insertion.
+ */
+static struct Task *pending_timeout_last;
+
+/**
+ * ID of the task that is running right now.
+ */
+static struct Task *active_task;
+
+/**
+ * List of tasks ready to run right now,
+ * grouped by importance.
+ */
+static struct Task *ready[GNUNET_SCHEDULER_PRIORITY_COUNT];
+
+/**
+ * Identity of the last task queued. Incremented for each task to
+ * generate a unique task ID (it is virtually impossible to start
+ * more than 2^64 tasks during the lifetime of a process).
+ */
+static GNUNET_SCHEDULER_TaskIdentifier last_id;
+
+/**
+ * Highest number so that all tasks with smaller identifiers
+ * have already completed. Also the lowest number of a task
+ * still waiting to be executed.
+ */
+static GNUNET_SCHEDULER_TaskIdentifier lowest_pending_id;
+
+/**
+ * Number of tasks on the ready list.
+ */
+static unsigned int ready_count;
+
+/**
+ * How many tasks have we run so far?
+ */
+static unsigned long long tasks_run;
+
+/**
+ * Priority of the task running right now. Only
+ * valid while a task is running.
+ */
+static enum GNUNET_SCHEDULER_Priority current_priority;
+
+/**
+ * Priority of the highest task added in the current select
+ * iteration.
+ */
+static enum GNUNET_SCHEDULER_Priority max_priority_added;
/**
* future), but only if the return value is "GNUNET_NO" (and
* the "lowest_pending_id" check failed).
*
- * @param sched the scheduler
* @param id which task are we checking for
* @return GNUNET_YES if so, GNUNET_NO if not
*/
static int
-is_pending (struct GNUNET_SCHEDULER_Handle *sched,
- GNUNET_SCHEDULER_TaskIdentifier id)
+is_pending (GNUNET_SCHEDULER_TaskIdentifier id)
{
struct Task *pos;
enum GNUNET_SCHEDULER_Priority p;
GNUNET_SCHEDULER_TaskIdentifier min;
- if (id < sched->lowest_pending_id)
+ if (id < lowest_pending_id)
return GNUNET_NO;
min = -1; /* maximum value */
- pos = sched->pending;
+ pos = pending;
+ while (pos != NULL)
+ {
+ if (pos->id == id)
+ return GNUNET_YES;
+ if (pos->id < min)
+ min = pos->id;
+ pos = pos->next;
+ }
+ pos = pending_timeout;
while (pos != NULL)
{
if (pos->id == id)
}
for (p = 0; p < GNUNET_SCHEDULER_PRIORITY_COUNT; p++)
{
- pos = sched->ready[p];
+ pos = ready[p];
while (pos != NULL)
{
if (pos->id == id)
pos = pos->next;
}
}
- sched->lowest_pending_id = min;
+ lowest_pending_id = min;
return GNUNET_NO;
}
/**
* Update all sets and timeout for select.
*
- * @param sched the scheduler
* @param rs read-set, set to all FDs we would like to read (updated)
* @param ws write-set, set to all FDs we would like to write (updated)
* @param timeout next timeout (updated)
*/
static void
-update_sets (struct GNUNET_SCHEDULER_Handle *sched,
- struct GNUNET_NETWORK_FDSet * rs,
- struct GNUNET_NETWORK_FDSet * ws,
- struct GNUNET_TIME_Relative *timeout)
+update_sets (struct GNUNET_NETWORK_FDSet *rs,
+ struct GNUNET_NETWORK_FDSet *ws,
+ struct GNUNET_TIME_Relative *timeout)
{
struct Task *pos;
+ struct GNUNET_TIME_Absolute now;
+ struct GNUNET_TIME_Relative to;
- pos = sched->pending;
+ now = GNUNET_TIME_absolute_get ();
+ pos = pending_timeout;
+ if (pos != NULL)
+ {
+ to = GNUNET_TIME_absolute_get_difference (now, pos->timeout);
+ if (timeout->rel_value > to.rel_value)
+ *timeout = to;
+ if (pos->reason != 0)
+ *timeout = GNUNET_TIME_UNIT_ZERO;
+ }
+ pos = pending;
while (pos != NULL)
{
if ((pos->prereq_id != GNUNET_SCHEDULER_NO_TASK) &&
- (GNUNET_YES == is_pending (sched, pos->prereq_id)))
+ (GNUNET_YES == is_pending (pos->prereq_id)))
{
pos = pos->next;
continue;
}
-
- if (pos->timeout.value != GNUNET_TIME_UNIT_FOREVER_ABS.value)
+ if (pos->timeout.abs_value != GNUNET_TIME_UNIT_FOREVER_ABS.abs_value)
{
- struct GNUNET_TIME_Relative to;
-
- to = GNUNET_TIME_absolute_get_remaining (pos->timeout);
- if (timeout->value > to.value)
- *timeout = to;
+ to = GNUNET_TIME_absolute_get_difference (now, pos->timeout);
+ if (timeout->rel_value > to.rel_value)
+ *timeout = to;
}
+ if (pos->read_fd != -1)
+ GNUNET_NETWORK_fdset_set_native (rs, pos->read_fd);
+ if (pos->write_fd != -1)
+ GNUNET_NETWORK_fdset_set_native (ws, pos->write_fd);
if (pos->read_set != NULL)
- GNUNET_NETWORK_fdset_add (rs, pos->read_set);
+ GNUNET_NETWORK_fdset_add (rs, pos->read_set);
if (pos->write_set != NULL)
- GNUNET_NETWORK_fdset_add (ws, pos->write_set);
+ GNUNET_NETWORK_fdset_add (ws, pos->write_set);
+ if (pos->reason != 0)
+ *timeout = GNUNET_TIME_UNIT_ZERO;
pos = pos->next;
}
}
* @return GNUNET_YES if there was some overlap
*/
static int
-set_overlaps (const struct GNUNET_NETWORK_FDSet * ready,
- struct GNUNET_NETWORK_FDSet * want)
+set_overlaps (const struct GNUNET_NETWORK_FDSet *ready,
+ struct GNUNET_NETWORK_FDSet *want)
{
- if (NULL == want)
+ if ( (NULL == want) || (NULL == ready) )
return GNUNET_NO;
if (GNUNET_NETWORK_fdset_overlap (ready, want))
{
* Check if the given task is eligible to run now.
* Also set the reason why it is eligible.
*
- * @param sched the scheduler
* @param task task to check if it is ready
* @param now the current time
* @param rs set of FDs ready for reading
* @return GNUNET_YES if we can run it, GNUNET_NO if not.
*/
static int
-is_ready (struct GNUNET_SCHEDULER_Handle *sched,
- struct Task *task,
+is_ready (struct Task *task,
struct GNUNET_TIME_Absolute now,
const struct GNUNET_NETWORK_FDSet *rs,
- const struct GNUNET_NETWORK_FDSet * ws)
+ const struct GNUNET_NETWORK_FDSet *ws)
{
- if ((GNUNET_NO == task->run_on_shutdown) && (GNUNET_YES == sched->shutdown))
- return GNUNET_NO;
- if ((GNUNET_YES == task->run_on_shutdown) &&
- (GNUNET_YES == sched->shutdown))
- task->reason |= GNUNET_SCHEDULER_REASON_SHUTDOWN;
- if (now.value >= task->timeout.value)
- task->reason |= GNUNET_SCHEDULER_REASON_TIMEOUT;
- if ((0 == (task->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
- (rs != NULL) && (set_overlaps (rs, task->read_set)))
- task->reason |= GNUNET_SCHEDULER_REASON_READ_READY;
- if ((0 == (task->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
- (ws != NULL) && (set_overlaps (ws, task->write_set)))
- task->reason |= GNUNET_SCHEDULER_REASON_WRITE_READY;
- if (task->reason == 0)
- return GNUNET_NO; /* not ready */
+ enum GNUNET_SCHEDULER_Reason reason;
+
+ reason = task->reason;
+ if (now.abs_value >= task->timeout.abs_value)
+ reason |= GNUNET_SCHEDULER_REASON_TIMEOUT;
+ if ( (0 == (reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
+ ( ( (task->read_fd != -1) &&
+ (GNUNET_YES == GNUNET_NETWORK_fdset_test_native (rs, task->read_fd)) ) ||
+ (set_overlaps (rs, task->read_set) ) ) )
+ reason |= GNUNET_SCHEDULER_REASON_READ_READY;
+ if ((0 == (reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) &&
+ ( ( (task->write_fd != -1) &&
+ (GNUNET_YES == GNUNET_NETWORK_fdset_test_native (ws, task->write_fd)) ) ||
+ (set_overlaps (ws, task->write_set) ) ) )
+ reason |= GNUNET_SCHEDULER_REASON_WRITE_READY;
+ if (reason == 0)
+ return GNUNET_NO; /* not ready */
if (task->prereq_id != GNUNET_SCHEDULER_NO_TASK)
{
- if (GNUNET_YES == is_pending (sched, task->prereq_id))
- return GNUNET_NO; /* prereq waiting */
- task->reason |= GNUNET_SCHEDULER_REASON_PREREQ_DONE;
+ if (GNUNET_YES == is_pending (task->prereq_id))
+ {
+ task->reason = reason;
+ return GNUNET_NO; /* prereq waiting */
+ }
+ reason |= GNUNET_SCHEDULER_REASON_PREREQ_DONE;
}
+ task->reason = reason;
return GNUNET_YES;
}
* @param task task ready for execution
*/
static void
-queue_ready_task (struct GNUNET_SCHEDULER_Handle *handle,
- struct Task *task)
+queue_ready_task (struct Task *task)
{
- task->next = handle->ready[check_priority (task->priority)];
- handle->ready[check_priority (task->priority)] = task;
- handle->ready_count++;
+ enum GNUNET_SCHEDULER_Priority p = task->priority;
+ if (0 != (task->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
+ p = GNUNET_SCHEDULER_PRIORITY_SHUTDOWN;
+ task->next = ready[check_priority (p)];
+ ready[check_priority (p)] = task;
+ ready_count++;
}
* @param ws FDs ready for writing
*/
static void
-check_ready (struct GNUNET_SCHEDULER_Handle *handle,
- const struct GNUNET_NETWORK_FDSet * rs,
- const struct GNUNET_NETWORK_FDSet * ws)
+check_ready (const struct GNUNET_NETWORK_FDSet *rs,
+ const struct GNUNET_NETWORK_FDSet *ws)
{
struct Task *pos;
struct Task *prev;
now = GNUNET_TIME_absolute_get ();
prev = NULL;
- pos = handle->pending;
+ pos = pending_timeout;
+ while (pos != NULL)
+ {
+ next = pos->next;
+ if (now.abs_value >= pos->timeout.abs_value)
+ pos->reason |= GNUNET_SCHEDULER_REASON_TIMEOUT;
+ if (0 == pos->reason)
+ break;
+ pending_timeout = next;
+ if (pending_timeout_last == pos)
+ pending_timeout_last = NULL;
+ queue_ready_task (pos);
+ pos = next;
+ }
+ pos = pending;
while (pos != NULL)
{
#if DEBUG_TASKS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Checking readyness of task: %llu / %p\n",
- pos->id,
- pos->callback_cls);
+ "Checking readiness of task: %llu / %p\n",
+ pos->id, pos->callback_cls);
#endif
next = pos->next;
- if (GNUNET_YES == is_ready (handle, pos, now, rs, ws))
+ if (GNUNET_YES == is_ready (pos, now, rs, ws))
{
if (prev == NULL)
- handle->pending = next;
+ pending = next;
else
prev->next = next;
- queue_ready_task (handle, pos);
+ queue_ready_task (pos);
pos = next;
continue;
}
}
+/**
+ * Request the shutdown of a scheduler. Marks all currently
+ * pending tasks as ready because of shutdown. This will
+ * cause all tasks to run (as soon as possible, respecting
+ * priorities and prerequisite tasks). Note that tasks
+ * scheduled AFTER this call may still be delayed arbitrarily.
+ */
+void
+GNUNET_SCHEDULER_shutdown ()
+{
+ struct Task *pos;
+ int i;
+
+ pos = pending_timeout;
+ while (pos != NULL)
+ {
+ pos->reason |= GNUNET_SCHEDULER_REASON_SHUTDOWN;
+ /* we don't move the task into the ready queue yet; check_ready
+ will do that later, possibly adding additional
+ readiness-factors */
+ pos = pos->next;
+ }
+ pos = pending;
+ while (pos != NULL)
+ {
+ pos->reason |= GNUNET_SCHEDULER_REASON_SHUTDOWN;
+ /* we don't move the task into the ready queue yet; check_ready
+ will do that later, possibly adding additional
+ readiness-factors */
+ pos = pos->next;
+ }
+ for (i=0;i<GNUNET_SCHEDULER_PRIORITY_COUNT;i++)
+ {
+ pos = ready[i];
+ while (pos != NULL)
+ {
+ pos->reason |= GNUNET_SCHEDULER_REASON_SHUTDOWN;
+ /* we don't move the task into the ready queue yet; check_ready
+ will do that later, possibly adding additional
+ readiness-factors */
+ pos = pos->next;
+ }
+ }
+}
+
+
/**
* Destroy a task (release associated resources)
*
* @param t task to destroy
*/
-static void destroy_task (struct Task *t)
+static void
+destroy_task (struct Task *t)
{
if (NULL != t->read_set)
GNUNET_NETWORK_fdset_destroy (t->read_set);
if (NULL != t->write_set)
GNUNET_NETWORK_fdset_destroy (t->write_set);
+#if EXECINFO
+ GNUNET_free (t->backtrace_strings);
+#endif
GNUNET_free (t);
}
* empty. Keep running tasks until we are either no longer running
* "URGENT" tasks or until we have at least one "pending" task (which
* may become ready, hence we should select on it). Naturally, if
- * there are no more ready tasks, we also return.
+ * there are no more ready tasks, we also return.
*
- * @param sched the scheduler
+ * @param rs FDs ready for reading
+ * @param ws FDs ready for writing
*/
static void
-run_ready (struct GNUNET_SCHEDULER_Handle *sched)
+run_ready (struct GNUNET_NETWORK_FDSet *rs,
+ struct GNUNET_NETWORK_FDSet *ws)
{
enum GNUNET_SCHEDULER_Priority p;
struct Task *pos;
struct GNUNET_SCHEDULER_TaskContext tc;
+ max_priority_added = GNUNET_SCHEDULER_PRIORITY_KEEP;
do
{
- if (sched->ready_count == 0)
+ if (ready_count == 0)
return;
- GNUNET_assert (sched->ready[GNUNET_SCHEDULER_PRIORITY_KEEP] == NULL);
+ GNUNET_assert (ready[GNUNET_SCHEDULER_PRIORITY_KEEP] == NULL);
/* 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 = sched->ready[p];
+ pos = ready[p];
if (pos != NULL)
break;
}
GNUNET_assert (pos != NULL); /* ready_count wrong? */
- sched->ready[p] = pos->next;
- sched->ready_count--;
- sched->current_priority = p;
- GNUNET_assert (pos->priority == p);
- tc.sched = sched;
+ ready[p] = pos->next;
+ ready_count--;
+ if (current_priority != pos->priority)
+ {
+ current_priority = pos->priority;
+ (void) GNUNET_OS_set_process_priority (GNUNET_OS_process_current (), pos->priority);
+ }
+ active_task = pos;
+#if PROFILE_DELAYS
+ if (GNUNET_TIME_absolute_get_duration (pos->start_time).rel_value >
+ DELAY_THRESHOLD.rel_value)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Task %llu took %llums to be scheduled\n",
+ pos->id,
+ (unsigned long long) GNUNET_TIME_absolute_get_duration (pos->start_time).rel_value);
+ }
+#endif
tc.reason = pos->reason;
- tc.read_ready = pos->read_set;
- tc.write_ready = pos->write_set;
- pos->callback (pos->callback_cls, &tc);
+ tc.read_ready = (pos->read_set == NULL) ? rs : pos->read_set;
+ if ( (pos->read_fd != -1) &&
+ (0 != (pos->reason & GNUNET_SCHEDULER_REASON_READ_READY)) )
+ GNUNET_NETWORK_fdset_set_native (rs,
+ pos->read_fd);
+ tc.write_ready = (pos->write_set == NULL) ? ws : pos->write_set;
+ if ( (pos->write_fd != -1) &&
+ (0 != (pos->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) )
+ GNUNET_NETWORK_fdset_set_native (ws,
+ pos->write_fd);
+ if ( ( (tc.reason & GNUNET_SCHEDULER_REASON_WRITE_READY) != 0) &&
+ (pos->write_fd != -1) &&
+ (! GNUNET_NETWORK_fdset_test_native (ws,
+ pos->write_fd)))
+ abort (); // added to ready in previous select loop!
#if DEBUG_TASKS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Running task: %llu / %p\n",
- pos->id,
- pos->callback_cls);
+ "Running task: %llu / %p\n", pos->id, pos->callback_cls);
+#endif
+ pos->callback (pos->callback_cls, &tc);
+#if EXECINFO
+ int i;
+ for (i=0;i<pos->num_backtrace_strings;i++)
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Task %llu trace %d: %s\n",
+ pos->id,
+ i,
+ pos->backtrace_strings[i]);
#endif
+ active_task = NULL;
destroy_task (pos);
- sched->tasks_run++;
+ tasks_run++;
}
- while ((sched->pending == NULL) || (p == GNUNET_SCHEDULER_PRIORITY_URGENT));
+ while ( (pending == NULL) || (p >= max_priority_added) );
}
-
/**
* Pipe used to communicate shutdown via signal.
*/
-static struct GNUNET_DISK_PipeHandle *sigpipe;
-
+static struct GNUNET_DISK_PipeHandle *shutdown_pipe_handle;
+/**
+ * Signal handler called for SIGPIPE.
+ */
+#ifndef MINGW
+static void
+sighandler_pipe ()
+{
+ return;
+}
+#endif
/**
* Signal handler called for signals that should cause us to shutdown.
*/
sighandler_shutdown ()
{
static char c;
+ int old_errno = errno; /* backup errno */
- GNUNET_DISK_file_write (GNUNET_DISK_pipe_handle (sigpipe, GNUNET_DISK_PIPE_END_WRITE),
- &c,
- sizeof(c));
+ GNUNET_DISK_file_write (GNUNET_DISK_pipe_handle
+ (shutdown_pipe_handle, GNUNET_DISK_PIPE_END_WRITE), &c,
+ sizeof (c));
+ errno = old_errno;
}
/**
- * Initialize a scheduler using this thread. This function will
- * return when either a shutdown was initiated (via signal) and all
- * tasks marked to "run_on_shutdown" have been completed or when all
- * tasks in general have been completed.
+ * 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 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 task task to run immediately
- * @param cls closure of task
+ * @param task_cls closure of task
*/
void
-GNUNET_SCHEDULER_run (GNUNET_SCHEDULER_Task task, void *cls)
+GNUNET_SCHEDULER_run (GNUNET_SCHEDULER_Task task, void *task_cls)
{
- struct GNUNET_SCHEDULER_Handle sched;
struct GNUNET_NETWORK_FDSet *rs;
struct GNUNET_NETWORK_FDSet *ws;
struct GNUNET_TIME_Relative timeout;
int ret;
struct GNUNET_SIGNAL_Context *shc_int;
struct GNUNET_SIGNAL_Context *shc_term;
+#ifndef MINGW
struct GNUNET_SIGNAL_Context *shc_quit;
struct GNUNET_SIGNAL_Context *shc_hup;
- struct Task *tpos;
+ struct GNUNET_SIGNAL_Context *shc_pipe;
+#endif
unsigned long long last_tr;
unsigned int busy_wait_warning;
-#ifndef MINGW
const struct GNUNET_DISK_FileHandle *pr;
-#endif
+ char c;
+ GNUNET_assert (active_task == NULL);
rs = GNUNET_NETWORK_fdset_create ();
ws = GNUNET_NETWORK_fdset_create ();
-#ifndef MINGW
- sigpipe = GNUNET_DISK_pipe (GNUNET_NO);
- pr = GNUNET_DISK_pipe_handle (sigpipe, GNUNET_DISK_PIPE_END_READ);
+ GNUNET_assert (shutdown_pipe_handle == NULL);
+ shutdown_pipe_handle = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO, GNUNET_NO);
+ GNUNET_assert (shutdown_pipe_handle != NULL);
+ pr = GNUNET_DISK_pipe_handle (shutdown_pipe_handle, GNUNET_DISK_PIPE_END_READ);
+ GNUNET_assert (pr != NULL);
shc_int = GNUNET_SIGNAL_handler_install (SIGINT, &sighandler_shutdown);
shc_term = GNUNET_SIGNAL_handler_install (SIGTERM, &sighandler_shutdown);
+#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);
#endif
- memset (&sched, 0, sizeof (sched));
- sched.current_priority = GNUNET_SCHEDULER_PRIORITY_DEFAULT;
- GNUNET_SCHEDULER_add_continuation (&sched,
- GNUNET_YES,
- task,
- cls, GNUNET_SCHEDULER_REASON_STARTUP);
+ current_priority = GNUNET_SCHEDULER_PRIORITY_DEFAULT;
+ GNUNET_SCHEDULER_add_continuation (task,
+ task_cls,
+ GNUNET_SCHEDULER_REASON_STARTUP);
last_tr = 0;
busy_wait_warning = 0;
- while ((GNUNET_NO == sched.shutdown) &&
- ((sched.pending != NULL) || (sched.ready_count > 0)))
+ while ((pending != NULL) ||
+ (pending_timeout != NULL) ||
+ (ready_count > 0))
{
GNUNET_NETWORK_fdset_zero (rs);
GNUNET_NETWORK_fdset_zero (ws);
- timeout = GNUNET_TIME_relative_get_forever();
- update_sets (&sched, rs, ws, &timeout);
-#ifndef MINGW
+ timeout = GNUNET_TIME_UNIT_FOREVER_REL;
+ update_sets (rs, ws, &timeout);
GNUNET_NETWORK_fdset_handle_set (rs, pr);
-#endif
- if (sched.ready_count > 0)
+ if (ready_count > 0)
{
/* no blocking, more work already ready! */
- timeout = GNUNET_TIME_relative_get_zero();
+ timeout = GNUNET_TIME_UNIT_ZERO;
}
ret = GNUNET_NETWORK_socket_select (rs, ws, NULL, timeout);
-#ifndef MINGW
- if (GNUNET_NETWORK_fdset_handle_isset (rs, pr))
- break;
-#endif
- if (last_tr == sched.tasks_run)
- {
- busy_wait_warning++;
- }
- else
- {
- last_tr = sched.tasks_run;
- busy_wait_warning = 0;
- }
- if ( (ret == 0) &&
- (timeout.value == 0) &&
- (busy_wait_warning > 16) )
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Looks like we're busy waiting...\n"));
- sleep (1); /* mitigate */
- }
if (ret == GNUNET_SYSERR)
{
if (errno == EINTR)
continue;
+
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "select");
- break;
+#ifndef MINGW
+#if USE_LSOF
+ char lsof[512];
+ snprintf (lsof, sizeof (lsof), "lsof -p %d", getpid());
+ close (1);
+ dup2 (2, 1);
+ ret = system (lsof);
+#endif
+#endif
+ abort ();
+ break;
+ }
+ if ((ret == 0) && (timeout.rel_value == 0) && (busy_wait_warning > 16))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Looks like we're busy waiting...\n"));
+ sleep (1); /* mitigate */
+ }
+ check_ready (rs, ws);
+ run_ready (rs, ws);
+ if (GNUNET_NETWORK_fdset_handle_isset (rs, pr))
+ {
+ /* consume the signal */
+ GNUNET_DISK_file_read (pr, &c, sizeof (c));
+ /* mark all active tasks as ready due to shutdown */
+ GNUNET_SCHEDULER_shutdown ();
+ }
+ if (last_tr == tasks_run)
+ {
+ busy_wait_warning++;
+ }
+ else
+ {
+ last_tr = tasks_run;
+ busy_wait_warning = 0;
}
- check_ready (&sched, rs, ws);
- run_ready (&sched);
}
- sched.shutdown = GNUNET_YES;
-#ifndef MINGW
GNUNET_SIGNAL_handler_uninstall (shc_int);
GNUNET_SIGNAL_handler_uninstall (shc_term);
+#ifndef MINGW
+ GNUNET_SIGNAL_handler_uninstall (shc_pipe);
GNUNET_SIGNAL_handler_uninstall (shc_quit);
GNUNET_SIGNAL_handler_uninstall (shc_hup);
- GNUNET_DISK_pipe_close (sigpipe);
- sigpipe = NULL;
#endif
- do
- {
- run_ready (&sched);
- check_ready (&sched, NULL, NULL);
- }
- while (sched.ready_count > 0);
- while (NULL != (tpos = sched.pending))
- {
- sched.pending = tpos->next;
- GNUNET_free (tpos);
- }
+ GNUNET_DISK_pipe_close (shutdown_pipe_handle);
+ shutdown_pipe_handle = NULL;
GNUNET_NETWORK_fdset_destroy (rs);
GNUNET_NETWORK_fdset_destroy (ws);
}
/**
- * Request the shutdown of a scheduler. This function can be used to
- * stop a scheduling thread when created with the
- * "GNUNET_SCHEDULER_init_thread" function or from within the signal
- * handler for signals causing shutdowns.
+ * Obtain the reason code for why the current task was
+ * started. Will return the same value as
+ * the GNUNET_SCHEDULER_TaskContext's reason field.
*
- * @param sched the scheduler
+ * @return reason(s) why the current task is run
*/
-void
-GNUNET_SCHEDULER_shutdown (struct GNUNET_SCHEDULER_Handle *sched)
+enum GNUNET_SCHEDULER_Reason
+GNUNET_SCHEDULER_get_reason ()
{
- sched->shutdown = GNUNET_YES;
+ GNUNET_assert (active_task != NULL);
+ return active_task->reason;
}
* dropped (if the decision should be made based on the number of
* tasks ready to run).
*
- * @param sched scheduler to query
* @param p priority level to look at
* @return number of tasks pending right now
*/
unsigned int
-GNUNET_SCHEDULER_get_load (struct GNUNET_SCHEDULER_Handle *sched,
- enum GNUNET_SCHEDULER_Priority p)
+GNUNET_SCHEDULER_get_load (enum GNUNET_SCHEDULER_Priority p)
{
struct Task *pos;
unsigned int ret;
+ GNUNET_assert (active_task != NULL);
if (p == GNUNET_SCHEDULER_PRIORITY_COUNT)
- return sched->ready_count;
+ return ready_count;
if (p == GNUNET_SCHEDULER_PRIORITY_KEEP)
- p = sched->current_priority;
+ p = current_priority;
ret = 0;
- pos = sched->ready[p];
+ pos = ready[check_priority (p)];
while (pos != NULL)
{
pos = pos->next;
* Cancel the task with the specified identifier.
* The task must not yet have run.
*
- * @param sched scheduler to use
* @param task id of the task to cancel
* @return original closure of the task
*/
void *
-GNUNET_SCHEDULER_cancel (struct GNUNET_SCHEDULER_Handle *sched,
- GNUNET_SCHEDULER_TaskIdentifier task)
+GNUNET_SCHEDULER_cancel (GNUNET_SCHEDULER_TaskIdentifier task)
{
struct Task *t;
struct Task *prev;
enum GNUNET_SCHEDULER_Priority p;
+ int to;
void *ret;
+ GNUNET_assert (active_task != NULL);
+ to = 0;
prev = NULL;
- t = sched->pending;
+ t = pending;
while (t != NULL)
{
if (t->id == task)
prev = t;
t = t->next;
}
+ if (t == NULL)
+ {
+ prev = NULL;
+ to = 1;
+ t = pending_timeout;
+ while (t != NULL)
+ {
+ if (t->id == task)
+ break;
+ prev = t;
+ t = t->next;
+ }
+ if (pending_timeout_last == t)
+ pending_timeout_last = NULL;
+ }
p = 0;
while (t == NULL)
{
p++;
GNUNET_assert (p < GNUNET_SCHEDULER_PRIORITY_COUNT);
prev = NULL;
- t = sched->ready[p];
+ t = ready[p];
while (t != NULL)
{
if (t->id == task)
{
- sched->ready_count--;
+ ready_count--;
break;
}
prev = t;
if (prev == NULL)
{
if (p == 0)
- sched->pending = t->next;
+ {
+ if (to == 0)
+ {
+ pending = t->next;
+ }
+ else
+ {
+ pending_timeout = t->next;
+ }
+ }
else
- sched->ready[p] = t->next;
+ {
+ ready[p] = t->next;
+ }
}
else
- prev->next = t->next;
+ {
+ prev->next = t->next;
+ }
ret = t->callback_cls;
#if DEBUG_TASKS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Canceling task: %llu / %p\n",
- task,
- t->callback_cls);
+ "Canceling task: %llu / %p\n", task, t->callback_cls);
#endif
destroy_task (t);
return ret;
* similar to the other "add" functions except that there is no delay
* and the reason code can be specified.
*
- * @param sched scheduler to use
- * @param run_on_shutdown should this task be run if we are shutting down?
- * @param main main function of the task
- * @param cls closure for 'main'
+ * @param task main function of the task
+ * @param task_cls closure for 'main'
* @param reason reason for task invocation
*/
void
-GNUNET_SCHEDULER_add_continuation (struct GNUNET_SCHEDULER_Handle *sched,
- int run_on_shutdown,
- GNUNET_SCHEDULER_Task main,
- void *cls,
+GNUNET_SCHEDULER_add_continuation (GNUNET_SCHEDULER_Task task,
+ void *task_cls,
enum GNUNET_SCHEDULER_Reason reason)
{
- struct Task *task;
+ struct Task *t;
+#if EXECINFO
+ void *backtrace_array[50];
+#endif
- task = GNUNET_malloc (sizeof (struct Task));
- task->callback = main;
- task->callback_cls = cls;
- task->id = ++sched->last_id;
- task->reason = reason;
- task->priority = sched->current_priority;
- task->run_on_shutdown = run_on_shutdown;
+ GNUNET_assert ( (active_task != NULL) ||
+ (reason == GNUNET_SCHEDULER_REASON_STARTUP) );
+ t = GNUNET_malloc (sizeof (struct Task));
+#if EXECINFO
+ t->num_backtrace_strings = backtrace(backtrace_array, 50);
+ t->backtrace_strings = backtrace_symbols(backtrace_array, t->num_backtrace_strings);
+#endif
+ t->read_fd = -1;
+ t->write_fd = -1;
+ t->callback = task;
+ t->callback_cls = task_cls;
+ t->id = ++last_id;
+#if PROFILE_DELAYS
+ t->start_time = GNUNET_TIME_absolute_get ();
+#endif
+ t->reason = reason;
+ t->priority = current_priority;
#if DEBUG_TASKS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Adding continuation task: %llu / %p\n",
- task->id,
- task->callback_cls);
+ "Adding continuation task: %llu / %p\n",
+ t->id, t->callback_cls);
#endif
- queue_ready_task (sched, task);
+ queue_ready_task (t);
}
+
/**
- * Schedule a new task to be run after the specified
- * prerequisite task has completed.
+ * Schedule a new task to be run after the specified prerequisite task
+ * has completed. It will be run with the priority of the calling
+ * task.
*
- * @param sched scheduler to use
- * @param run_on_shutdown run on shutdown?
- * @param prio how important is this task?
* @param prerequisite_task run this task after the task with the given
* task identifier completes (and any of our other
- * conditions, such as delay, read or write-readyness
+ * conditions, such as delay, read or write-readiness
* are satisfied). Use GNUNET_SCHEDULER_NO_TASK to not have any dependency
- * on completion of other tasks.
- * @param main main function of the task
- * @param cls closure for 'main'
+ * on completion of other tasks (this will cause the task to run as
+ * soon as possible).
+ * @param task main function of the task
+ * @param task_cls closure of task
* @return unique task identifier for the job
- * only valid until "main" is started!
+ * only valid until "task" is started!
*/
GNUNET_SCHEDULER_TaskIdentifier
-GNUNET_SCHEDULER_add_after (struct GNUNET_SCHEDULER_Handle *sched,
- int run_on_shutdown,
- enum GNUNET_SCHEDULER_Priority prio,
- GNUNET_SCHEDULER_TaskIdentifier prerequisite_task,
- GNUNET_SCHEDULER_Task main, void *cls)
+GNUNET_SCHEDULER_add_after (GNUNET_SCHEDULER_TaskIdentifier prerequisite_task,
+ GNUNET_SCHEDULER_Task task, void *task_cls)
{
- return GNUNET_SCHEDULER_add_select (sched, run_on_shutdown, prio,
+ return GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_KEEP,
prerequisite_task,
GNUNET_TIME_UNIT_ZERO,
- NULL, NULL, main, cls);
+ NULL, NULL, task, task_cls);
}
+/**
+ * Schedule a new task to be run with a specified priority.
+ *
+ * @param prio how important is the new task?
+ * @param task main function of the task
+ * @param task_cls closure of task
+ * @return unique task identifier for the job
+ * only valid until "task" is started!
+ */
+GNUNET_SCHEDULER_TaskIdentifier
+GNUNET_SCHEDULER_add_with_priority (enum GNUNET_SCHEDULER_Priority prio,
+ GNUNET_SCHEDULER_Task task,
+ void *task_cls)
+{
+ return GNUNET_SCHEDULER_add_select (prio,
+ GNUNET_SCHEDULER_NO_TASK,
+ GNUNET_TIME_UNIT_ZERO,
+ NULL, NULL, task, task_cls);
+}
+
+
+
/**
* Schedule a new task to be run with a specified delay. The task
- * will be scheduled for execution once the delay has expired and the
- * prerequisite task has completed.
+ * will be scheduled for execution once the delay has expired. It
+ * will be run with the priority of the calling task.
*
- * @param sched scheduler to use
- * @param run_on_shutdown run on shutdown? You can use this
- * argument to run a function only during shutdown
- * by setting delay to -1. Set this
- * argument to GNUNET_NO to skip this task if
- * the user requested process termination.
- * @param prio how important is this task?
- * @param prerequisite_task run this task after the task with the given
- * task identifier completes (and any of our other
- * conditions, such as delay, read or write-readyness
- * are satisfied). Use GNUNET_SCHEDULER_NO_TASK to not have any dependency
- * on completion of other tasks.
- * @param delay how long should we wait? Use GNUNET_TIME_UNIT_FOREVER_REL for "forever"
- * @param main main function of the task
- * @param cls closure of task
+ * @param delay when should this operation time out? Use
+ * GNUNET_TIME_UNIT_FOREVER_REL for "on shutdown"
+ * @param task main function of the task
+ * @param task_cls closure of task
+ * @return unique task identifier for the job
+ * only valid until "task" is started!
+ */
+GNUNET_SCHEDULER_TaskIdentifier
+GNUNET_SCHEDULER_add_delayed (struct GNUNET_TIME_Relative delay,
+ GNUNET_SCHEDULER_Task task, void *task_cls)
+{
+#if 1
+ /* new, optimized version */
+ struct Task *t;
+ struct Task *pos;
+ struct Task *prev;
+#if EXECINFO
+ void *backtrace_array[MAX_TRACE_DEPTH];
+#endif
+
+ GNUNET_assert (active_task != NULL);
+ GNUNET_assert (NULL != task);
+ t = GNUNET_malloc (sizeof (struct Task));
+ t->callback = task;
+ t->callback_cls = task_cls;
+#if EXECINFO
+ t->num_backtrace_strings = backtrace(backtrace_array, MAX_TRACE_DEPTH);
+ t->backtrace_strings = backtrace_symbols(backtrace_array, t->num_backtrace_strings);
+#endif
+ t->read_fd = -1;
+ t->write_fd = -1;
+ t->id = ++last_id;
+#if PROFILE_DELAYS
+ t->start_time = GNUNET_TIME_absolute_get ();
+#endif
+ t->timeout = GNUNET_TIME_relative_to_absolute (delay);
+ t->priority = current_priority;
+ /* try tail first (optimization in case we are
+ appending to a long list of tasks with timeouts) */
+ prev = pending_timeout_last;
+ if (prev != NULL)
+ {
+ if (prev->timeout.abs_value > t->timeout.abs_value)
+ prev = NULL;
+ else
+ pos = prev->next; /* heuristic success! */
+ }
+ if (prev == NULL)
+ {
+ /* heuristic failed, do traversal of timeout list */
+ pos = pending_timeout;
+ }
+ while ( (pos != NULL) &&
+ ( (pos->timeout.abs_value <= t->timeout.abs_value) ||
+ (pos->reason != 0) ) )
+ {
+ prev = pos;
+ pos = pos->next;
+ }
+ if (prev == NULL)
+ pending_timeout = t;
+ else
+ prev->next = t;
+ t->next = pos;
+ /* hyper-optimization... */
+ pending_timeout_last = t;
+
+#if DEBUG_TASKS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Adding task: %llu / %p\n", t->id, t->callback_cls);
+#endif
+#if EXECINFO
+ int i;
+
+ for (i=0;i<t->num_backtrace_strings;i++)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Task %llu trace %d: %s\n",
+ t->id,
+ i,
+ t->backtrace_strings[i]);
+#endif
+ return t->id;
+
+#else
+ /* unoptimized version */
+ return GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_KEEP,
+ GNUNET_SCHEDULER_NO_TASK, delay,
+ NULL, NULL, task, task_cls);
+#endif
+}
+
+
+
+/**
+ * Schedule a new task to be run as soon as possible. The task
+ * will be run with the priority of the calling task.
+ *
+ * @param task main function of the task
+ * @param task_cls closure of task
+ * @return unique task identifier for the job
+ * only valid until "task" is started!
+ */
+GNUNET_SCHEDULER_TaskIdentifier
+GNUNET_SCHEDULER_add_now (GNUNET_SCHEDULER_Task task,
+ void *task_cls)
+{
+ return GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_KEEP,
+ GNUNET_SCHEDULER_NO_TASK,
+ GNUNET_TIME_UNIT_ZERO,
+ NULL, NULL, task, task_cls);
+}
+
+
+
+
+/**
+ * Schedule a new task to be run with a specified delay or when any of
+ * the specified file descriptor sets is ready. The delay can be used
+ * as a timeout on the socket(s) being ready. The task will be
+ * scheduled for execution once either the delay has expired or any of
+ * the socket operations is ready. This is the most general
+ * function of the "add" family. Note that the "prerequisite_task"
+ * must be satisfied in addition to any of the other conditions. In
+ * other words, the task will be started when
+ * <code>
+ * (prerequisite-run)
+ * && (delay-ready
+ * || any-rs-ready
+ * || any-ws-ready
+ * || shutdown-active )
+ * </code>
+ *
+ * @param delay how long should we wait? Use GNUNET_TIME_UNIT_FOREVER_REL for "forever",
+ * which means that the task will only be run after we receive SIGTERM
+ * @param rfd file descriptor we want to read (can be -1)
+ * @param wfd file descriptors we want to write (can be -1)
+ * @param task main function of the task
+ * @param task_cls closure of task
* @return unique task identifier for the job
- * only valid until "main" is started!
+ * only valid until "task" is started!
*/
GNUNET_SCHEDULER_TaskIdentifier
-GNUNET_SCHEDULER_add_delayed (struct GNUNET_SCHEDULER_Handle * sched,
- int run_on_shutdown,
- enum GNUNET_SCHEDULER_Priority prio,
- GNUNET_SCHEDULER_TaskIdentifier
- prerequisite_task,
- struct GNUNET_TIME_Relative delay,
- GNUNET_SCHEDULER_Task main, void *cls)
+add_without_sets (struct GNUNET_TIME_Relative delay,
+ int rfd,
+ int wfd,
+ GNUNET_SCHEDULER_Task task, void *task_cls)
{
- return GNUNET_SCHEDULER_add_select (sched, run_on_shutdown, prio,
- prerequisite_task, delay,
- NULL, NULL, main, cls);
+ struct Task *t;
+#if EXECINFO
+ void *backtrace_array[MAX_TRACE_DEPTH];
+#endif
+
+ GNUNET_assert (active_task != NULL);
+ GNUNET_assert (NULL != task);
+ t = GNUNET_malloc (sizeof (struct Task));
+ t->callback = task;
+ t->callback_cls = task_cls;
+#if EXECINFO
+ t->num_backtrace_strings = backtrace(backtrace_array, MAX_TRACE_DEPTH);
+ t->backtrace_strings = backtrace_symbols(backtrace_array, t->num_backtrace_strings);
+#endif
+ t->read_fd = rfd;
+ t->write_fd = wfd;
+ t->id = ++last_id;
+#if PROFILE_DELAYS
+ t->start_time = GNUNET_TIME_absolute_get ();
+#endif
+ t->prereq_id = GNUNET_SCHEDULER_NO_TASK;
+ t->timeout = GNUNET_TIME_relative_to_absolute (delay);
+ t->priority = check_priority (current_priority);
+ t->next = pending;
+ pending = t;
+ max_priority_added = GNUNET_MAX (max_priority_added,
+ t->priority);
+#if DEBUG_TASKS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Adding task: %llu / %p\n", t->id, t->callback_cls);
+#endif
+#if EXECINFO
+ int i;
+
+ for (i=0;i<t->num_backtrace_strings;i++)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Task %llu trace %d: %s\n",
+ t->id,
+ i,
+ t->backtrace_strings[i]);
+#endif
+ return t->id;
}
+
/**
* Schedule a new task to be run with a specified delay or when the
* specified file descriptor is ready for reading. 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.
+ * socket operation is ready. It will be run with the priority of
+ * the calling task.
*
- * @param sched scheduler to use
- * @param run_on_shutdown run on shutdown? Set this
- * argument to GNUNET_NO to skip this task if
- * the user requested process termination.
- * @param prio how important is this task?
- * @param prerequisite_task run this task after the task with the given
- * task identifier completes (and any of our other
- * conditions, such as delay, read or write-readyness
- * are satisfied). Use GNUNET_SCHEDULER_NO_TASK to not have any dependency
- * on completion of other tasks.
- * @param delay how long should we wait? Use GNUNET_TIME_UNIT_FOREVER_REL for "forever"
+ * @param delay when should this operation time out? Use
+ * GNUNET_TIME_UNIT_FOREVER_REL for "on shutdown"
* @param rfd read file-descriptor
- * @param main main function of the task
- * @param cls closure of task
+ * @param task main function of the task
+ * @param task_cls closure of task
* @return unique task identifier for the job
- * only valid until "main" is started!
+ * only valid until "task" is started!
*/
GNUNET_SCHEDULER_TaskIdentifier
-GNUNET_SCHEDULER_add_read_net (struct GNUNET_SCHEDULER_Handle * sched,
- int run_on_shutdown,
- enum GNUNET_SCHEDULER_Priority prio,
- GNUNET_SCHEDULER_TaskIdentifier prerequisite_task,
- struct GNUNET_TIME_Relative delay,
- struct GNUNET_NETWORK_Handle *rfd, GNUNET_SCHEDULER_Task main, void *cls)
+GNUNET_SCHEDULER_add_read_net (struct GNUNET_TIME_Relative delay,
+ struct GNUNET_NETWORK_Handle * rfd,
+ GNUNET_SCHEDULER_Task task, void *task_cls)
{
+ return add_without_sets (delay,
+ GNUNET_NETWORK_get_fd (rfd),
+ -1,
+ task,
+ task_cls);
+}
+
+
+/**
+ * Schedule a new task to be run with a specified delay or when the
+ * specified file descriptor is ready for writing. 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. It will be run with the priority of
+ * the calling task.
+ *
+ * @param delay when should this operation time out? Use
+ * GNUNET_TIME_UNIT_FOREVER_REL for "on shutdown"
+ * @param wfd write file-descriptor
+ * @param task main function of the task
+ * @param task_cls closure of task
+ * @return unique task identifier for the job
+ * only valid until "task" is started!
+ */
+GNUNET_SCHEDULER_TaskIdentifier
+GNUNET_SCHEDULER_add_write_net (struct GNUNET_TIME_Relative delay,
+ struct GNUNET_NETWORK_Handle * wfd,
+ GNUNET_SCHEDULER_Task task, void *task_cls)
+{
+ return add_without_sets (delay,
+ -1,
+ GNUNET_NETWORK_get_fd (wfd),
+ task,
+ task_cls);
+}
+
+
+/**
+ * Schedule a new task to be run with a specified delay or when the
+ * specified file descriptor is ready for reading. 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. It will be run with the priority of
+ * the calling task.
+ *
+ * @param delay when should this operation time out? Use
+ * GNUNET_TIME_UNIT_FOREVER_REL for "on shutdown"
+ * @param rfd read file-descriptor
+ * @param task main function of the task
+ * @param task_cls closure of task
+ * @return unique task identifier for the job
+ * only valid until "task" is started!
+ */
+GNUNET_SCHEDULER_TaskIdentifier
+GNUNET_SCHEDULER_add_read_file (struct GNUNET_TIME_Relative delay,
+ const struct GNUNET_DISK_FileHandle * rfd,
+ GNUNET_SCHEDULER_Task task, void *task_cls)
+{
+#if MINGW
struct GNUNET_NETWORK_FDSet *rs;
GNUNET_SCHEDULER_TaskIdentifier ret;
GNUNET_assert (rfd != NULL);
rs = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_set (rs, rfd);
- ret = GNUNET_SCHEDULER_add_select (sched, run_on_shutdown, prio,
- prerequisite_task, delay,
- rs, NULL, main, cls);
+ GNUNET_NETWORK_fdset_handle_set (rs, rfd);
+ ret = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_KEEP,
+ GNUNET_SCHEDULER_NO_TASK, delay,
+ rs, NULL, task, task_cls);
GNUNET_NETWORK_fdset_destroy (rs);
return ret;
+#else
+ int fd;
+
+ GNUNET_DISK_internal_file_handle_ (rfd, &fd, sizeof (int));
+ return add_without_sets (delay,
+ fd,
+ -1,
+ task,
+ task_cls);
+
+#endif
}
* specified file descriptor is ready for writing. 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.
+ * socket operation is ready. It will be run with the priority of
+ * the calling task.
*
- * @param sched scheduler to use
- * @param run_on_shutdown run on shutdown? Set this
- * argument to GNUNET_NO to skip this task if
- * the user requested process termination.
- * @param prio how important is this task?
- * @param prerequisite_task run this task after the task with the given
- * task identifier completes (and any of our other
- * conditions, such as delay, read or write-readyness
- * are satisfied). Use GNUNET_SCHEDULER_NO_TASK to not have any dependency
- * on completion of other tasks.
- * @param delay how long should we wait? Use GNUNET_TIME_UNIT_FOREVER_REL for "forever"
+ * @param delay when should this operation time out? Use
+ * GNUNET_TIME_UNIT_FOREVER_REL for "on shutdown"
* @param wfd write file-descriptor
- * @param main main function of the task
- * @param cls closure of task
+ * @param task main function of the task
+ * @param task_cls closure of task
* @return unique task identifier for the job
- * only valid until "main" is started!
+ * only valid until "task" is started!
*/
GNUNET_SCHEDULER_TaskIdentifier
-GNUNET_SCHEDULER_add_write_net (struct GNUNET_SCHEDULER_Handle * sched,
- int run_on_shutdown,
- enum GNUNET_SCHEDULER_Priority prio,
- GNUNET_SCHEDULER_TaskIdentifier prerequisite_task,
- struct GNUNET_TIME_Relative delay,
- struct GNUNET_NETWORK_Handle *wfd, GNUNET_SCHEDULER_Task main, void *cls)
+GNUNET_SCHEDULER_add_write_file (struct GNUNET_TIME_Relative delay,
+ const struct GNUNET_DISK_FileHandle * wfd,
+ GNUNET_SCHEDULER_Task task, void *task_cls)
{
+#if MINGW
struct GNUNET_NETWORK_FDSet *ws;
GNUNET_SCHEDULER_TaskIdentifier ret;
GNUNET_assert (wfd != NULL);
ws = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_set (ws, wfd);
- ret = GNUNET_SCHEDULER_add_select (sched, run_on_shutdown, prio,
- prerequisite_task, delay,
- NULL, ws, main, cls);
+ GNUNET_NETWORK_fdset_handle_set (ws, wfd);
+ ret = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_KEEP,
+ GNUNET_SCHEDULER_NO_TASK,
+ delay, NULL, ws, task, task_cls);
GNUNET_NETWORK_fdset_destroy (ws);
return ret;
+#else
+ int fd;
+
+ GNUNET_DISK_internal_file_handle_ (wfd, &fd, sizeof (int));
+ return add_without_sets (delay,
+ -1,
+ fd,
+ task,
+ task_cls);
+
+#endif
}
+
/**
* Schedule a new task to be run with a specified delay or when any of
* the specified file descriptor sets is ready. The delay can be used
* || (shutdown-active && run-on-shutdown) )
* </code>
*
- * @param sched scheduler to use
- * @param run_on_shutdown run on shutdown? Set this
- * argument to GNUNET_NO to skip this task if
- * the user requested process termination.
* @param prio how important is this task?
* @param prerequisite_task run this task after the task with the given
* task identifier completes (and any of our other
- * conditions, such as delay, read or write-readyness
+ * conditions, such as delay, read or write-readiness
* are satisfied). Use GNUNET_SCHEDULER_NO_TASK to not have any dependency
* on completion of other tasks.
- * @param delay how long should we wait? Use GNUNET_TIME_UNIT_FOREVER_REL for "forever"
+ * @param delay how long should we wait? Use GNUNET_TIME_UNIT_FOREVER_REL for "forever",
+ * which means that the task will only be run after we receive SIGTERM
* @param rs set of file descriptors we want to read (can be NULL)
* @param ws set of file descriptors we want to write (can be NULL)
- * @param main main function of the task
- * @param cls closure of task
+ * @param task main function of the task
+ * @param task_cls closure of task
* @return unique task identifier for the job
- * only valid until "main" is started!
+ * only valid until "task" is started!
*/
GNUNET_SCHEDULER_TaskIdentifier
-GNUNET_SCHEDULER_add_select (struct GNUNET_SCHEDULER_Handle * sched,
- int run_on_shutdown,
- enum GNUNET_SCHEDULER_Priority prio,
+GNUNET_SCHEDULER_add_select (enum GNUNET_SCHEDULER_Priority prio,
GNUNET_SCHEDULER_TaskIdentifier
prerequisite_task,
struct GNUNET_TIME_Relative delay,
const struct GNUNET_NETWORK_FDSet * rs,
- const struct GNUNET_NETWORK_FDSet * ws,
- GNUNET_SCHEDULER_Task main, void *cls)
+ const struct GNUNET_NETWORK_FDSet * ws,
+ GNUNET_SCHEDULER_Task task, void *task_cls)
{
- struct Task *task;
+ struct Task *t;
+#if EXECINFO
+ void *backtrace_array[MAX_TRACE_DEPTH];
+#endif
- task = GNUNET_malloc (sizeof (struct Task));
- task->callback = main;
- task->callback_cls = cls;
+ GNUNET_assert (active_task != NULL);
+ GNUNET_assert (NULL != task);
+ t = GNUNET_malloc (sizeof (struct Task));
+ t->callback = task;
+ t->callback_cls = task_cls;
+#if EXECINFO
+ t->num_backtrace_strings = backtrace(backtrace_array, MAX_TRACE_DEPTH);
+ t->backtrace_strings = backtrace_symbols(backtrace_array, t->num_backtrace_strings);
+#endif
+ t->read_fd = -1;
+ t->write_fd = -1;
if (rs != NULL)
{
- task->read_set = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_copy (task->read_set, rs);
+ t->read_set = GNUNET_NETWORK_fdset_create ();
+ GNUNET_NETWORK_fdset_copy (t->read_set, rs);
}
if (ws != NULL)
{
- task->write_set = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_copy (task->write_set, ws);
+ t->write_set = GNUNET_NETWORK_fdset_create ();
+ GNUNET_NETWORK_fdset_copy (t->write_set, ws);
}
- task->id = ++sched->last_id;
- task->prereq_id = prerequisite_task;
- task->timeout = GNUNET_TIME_relative_to_absolute (delay);
- task->priority =
+ t->id = ++last_id;
+#if PROFILE_DELAYS
+ t->start_time = GNUNET_TIME_absolute_get ();
+#endif
+ t->prereq_id = prerequisite_task;
+ t->timeout = GNUNET_TIME_relative_to_absolute (delay);
+ t->priority =
check_priority ((prio ==
- GNUNET_SCHEDULER_PRIORITY_KEEP) ? sched->current_priority
+ GNUNET_SCHEDULER_PRIORITY_KEEP) ? current_priority
: prio);
- task->run_on_shutdown = run_on_shutdown;
- task->next = sched->pending;
- sched->pending = task;
+ t->next = pending;
+ pending = t;
+ max_priority_added = GNUNET_MAX (max_priority_added,
+ t->priority);
#if DEBUG_TASKS
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Adding task: %llu / %p\n",
- task->id,
- task->callback_cls);
+ "Adding task: %llu / %p\n", t->id, t->callback_cls);
#endif
- return task->id;
-}
+#if EXECINFO
+ int i;
-/**
- * Schedule a new task to be run with a specified delay or when the
- * specified file descriptor is ready for reading. 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.
- *
- * @param sched scheduler to use
- * @param run_on_shutdown run on shutdown? Set this
- * argument to GNUNET_NO to skip this task if
- * the user requested process termination.
- * @param prio how important is this task?
- * @param prerequisite_task run this task after the task with the given
- * task identifier completes (and any of our other
- * conditions, such as delay, read or write-readyness
- * are satisfied). Use GNUNET_SCHEDULER_NO_TASK to not have any dependency
- * on completion of other tasks.
- * @param delay how long should we wait? Use GNUNET_TIME_UNIT_FOREVER_REL for "forever"
- * @param rfd read file-descriptor
- * @param main main function of the task
- * @param cls closure of task
- * @return unique task identifier for the job
- * only valid until "main" is started!
- */
-GNUNET_SCHEDULER_TaskIdentifier
-GNUNET_SCHEDULER_add_read_file (struct GNUNET_SCHEDULER_Handle * sched,
- int run_on_shutdown,
- enum GNUNET_SCHEDULER_Priority prio,
- GNUNET_SCHEDULER_TaskIdentifier prerequisite_task,
- struct GNUNET_TIME_Relative delay,
- const struct GNUNET_DISK_FileHandle *rfd,
- GNUNET_SCHEDULER_Task main, void *cls)
-{
- struct GNUNET_NETWORK_FDSet *rs;
- GNUNET_SCHEDULER_TaskIdentifier ret;
-
- GNUNET_assert (rfd != NULL);
- rs = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_handle_set (rs, rfd);
- ret = GNUNET_SCHEDULER_add_select (sched, run_on_shutdown, prio,
- prerequisite_task, delay,
- rs, NULL, main, cls);
- GNUNET_NETWORK_fdset_destroy (rs);
- return ret;
-}
-
-
-/**
- * Schedule a new task to be run with a specified delay or when the
- * specified file descriptor is ready for writing. 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.
- *
- * @param sched scheduler to use
- * @param run_on_shutdown run on shutdown? Set this
- * argument to GNUNET_NO to skip this task if
- * the user requested process termination.
- * @param prio how important is this task?
- * @param prerequisite_task run this task after the task with the given
- * task identifier completes (and any of our other
- * conditions, such as delay, read or write-readyness
- * are satisfied). Use GNUNET_SCHEDULER_NO_TASK to not have any dependency
- * on completion of other tasks.
- * @param delay how long should we wait? Use GNUNET_TIME_UNIT_FOREVER_REL for "forever"
- * @param wfd write file-descriptor
- * @param main main function of the task
- * @param cls closure of task
- * @return unique task identifier for the job
- * only valid until "main" is started!
- */
-GNUNET_SCHEDULER_TaskIdentifier
-GNUNET_SCHEDULER_add_write_file (struct GNUNET_SCHEDULER_Handle * sched,
- int run_on_shutdown,
- enum GNUNET_SCHEDULER_Priority prio,
- GNUNET_SCHEDULER_TaskIdentifier prerequisite_task,
- struct GNUNET_TIME_Relative delay,
- const struct GNUNET_DISK_FileHandle *wfd,
- GNUNET_SCHEDULER_Task main, void *cls)
-{
- struct GNUNET_NETWORK_FDSet *ws;
- GNUNET_SCHEDULER_TaskIdentifier ret;
-
- GNUNET_assert (wfd != NULL);
- ws = GNUNET_NETWORK_fdset_create ();
- GNUNET_NETWORK_fdset_handle_set (ws, wfd);
- ret = GNUNET_SCHEDULER_add_select (sched, run_on_shutdown, prio,
- prerequisite_task, delay,
- NULL, ws, main, cls);
- GNUNET_NETWORK_fdset_destroy (ws);
- return ret;
+ for (i=0;i<t->num_backtrace_strings;i++)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Task %llu trace %d: %s\n",
+ t->id,
+ i,
+ t->backtrace_strings[i]);
+#endif
+ return t->id;
}
-
/* end of scheduler.c */
projects / oweals / gnunet.git / blobdiff