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22 * @file testbed/testbed_api_operations.h
23 * @brief internal API to access the 'operations' subsystem
24 * @author Christian Grothoff
26 #ifndef NEW_TESTING_API_OPERATIONS_H
27 #define NEW_TESTING_API_OPERATIONS_H
29 #include "gnunet_testbed_service.h"
30 #include "gnunet_helper_lib.h"
34 * Queue of operations where we can only support a certain
35 * number of concurrent operations of a particular type.
37 struct OperationQueue;
41 * Create an operation queue.
43 * @param max_active maximum number of operations in this
44 * queue that can be active in parallel at the same time
45 * @return handle to the queue
47 struct OperationQueue *
48 GNUNET_TESTBED_operation_queue_create_ (unsigned int max_active);
52 * Destroy an operation queue. The queue MUST be empty
55 * @param queue queue to destroy
58 GNUNET_TESTBED_operation_queue_destroy_ (struct OperationQueue *queue);
62 * Function to reset the maximum number of operations in the given queue. If
63 * max_active is lesser than the number of currently active operations, the
64 * active operations are not stopped immediately.
66 * @param queue the operation queue which has to be modified
67 * @param max_active the new maximum number of active operations
70 GNUNET_TESTBED_operation_queue_reset_max_active_ (struct OperationQueue *queue,
71 unsigned int max_active);
75 * Add an operation to a queue. An operation can be in multiple queues at
76 * once. Once the operation is inserted into all the queues
77 * GNUNET_TESTBED_operation_begin_wait_() has to be called to actually start
78 * waiting for the operation to become active.
80 * @param queue queue to add the operation to
81 * @param operation operation to add to the queue
82 * @param nres the number of units of the resources of queue needed by the
83 * operation. Should be greater than 0.
86 GNUNET_TESTBED_operation_queue_insert2_ (struct OperationQueue *queue,
87 struct GNUNET_TESTBED_Operation
93 * Add an operation to a queue. An operation can be in multiple queues at
94 * once. Once the operation is inserted into all the queues
95 * GNUNET_TESTBED_operation_begin_wait_() has to be called to actually start
96 * waiting for the operation to become active.
98 * @param queue queue to add the operation to
99 * @param operation operation to add to the queue
102 GNUNET_TESTBED_operation_queue_insert_ (struct OperationQueue *queue,
103 struct GNUNET_TESTBED_Operation
108 * Marks the given operation as waiting on the queues. Once all queues permit
109 * the operation to become active, the operation will be activated. The actual
110 * activation will occur in a separate task (thus allowing multiple queue
111 * insertions to be made without having the first one instantly trigger the
112 * operation if the first queue has sufficient resources).
114 * @param operation the operation to marks as waiting
117 GNUNET_TESTBED_operation_begin_wait_ (struct GNUNET_TESTBED_Operation
122 * Remove an operation from a queue. This can be because the
123 * oeration was active and has completed (and the resources have
124 * been released), or because the operation was cancelled and
125 * thus scheduling the operation is no longer required.
127 * @param queue queue to add the operation to
128 * @param operation operation to add to the queue
131 GNUNET_TESTBED_operation_queue_remove_ (struct OperationQueue *queue,
132 struct GNUNET_TESTBED_Operation
138 * Function to call to start an operation once all
139 * queues the operation is part of declare that the
140 * operation can be activated.
142 * @param cls the closure from GNUNET_TESTBED_operation_create_()
144 typedef void (*OperationStart) (void *cls);
148 * Function to call to cancel an operation (release all associated
149 * resources). This can be because of a call to
150 * "GNUNET_TESTBED_operation_cancel" (before the operation generated
151 * an event) or AFTER the operation generated an event due to a call
152 * to "GNUNET_TESTBED_operation_done". Thus it is not guaranteed that
153 * a callback to the 'OperationStart' preceeds the call to
154 * 'OperationRelease'. Implementations of this function are expected
155 * to clean up whatever state is in 'cls' and release all resources
156 * associated with the operation.
158 * @param cls the closure from GNUNET_TESTBED_operation_create_()
160 typedef void (*OperationRelease) (void *cls);
164 * Create an 'operation' to be performed.
166 * @param cls closure for the callbacks
167 * @param start function to call to start the operation
168 * @param release function to call to close down the operation
169 * @return handle to the operation
171 struct GNUNET_TESTBED_Operation *
172 GNUNET_TESTBED_operation_create_ (void *cls, OperationStart start,
173 OperationRelease release);
177 * An operation is 'done' (was cancelled or finished); remove
178 * it from the queues and release associated resources.
180 * @param operation operation that finished
183 GNUNET_TESTBED_operation_release_ (struct GNUNET_TESTBED_Operation *operation);
187 /* end of testbed_api_operations.h */