Files | |
file | msg.c |
Message handling functions. | |
Functions | |
RT_TASK * | rt_send (RT_TASK *task, unsigned int msg) |
Send a message. | |
RT_TASK * | rt_send_if (RT_TASK *task, unsigned int msg) |
Send a message, only if the calling task will not be blocked. | |
RT_TASK * | rt_send_until (RT_TASK *task, unsigned int msg, RTIME time) |
RT_TASK * | rt_send_timed (RT_TASK *task, unsigned int msg, RTIME delay) |
RT_TASK * | rt_evdrp (RT_TASK *task, unsigned int *msg) |
Eavedrop (spy) the content of a message. | |
RT_TASK * | rt_receive (RT_TASK *task, unsigned int *msg) |
Receive a message. | |
RT_TASK * | rt_receive_if (RT_TASK *task, unsigned int *msg) |
Receive a message, only if the calling task is not blocked. | |
RT_TASK * | rt_receive_until (RT_TASK *task, unsigned int *msg, RTIME time) |
Receive a message with an absolute timeout. | |
RT_TASK * | rt_receive_timed (RT_TASK *task, unsigned int *msg, RTIME delay) |
Receive a message with a relative timeout. | |
RT_TASK * | rt_sendx (RT_TASK *task, void *msg, int size) |
Send an extended message. | |
RT_TASK * | rt_sendx_if (RT_TASK *task, void *msg, int size) |
Send an extended message, only if the calling task will not be blocked. | |
RT_TASK * | rt_sendx_until (RT_TASK *task, void *msg, int size, RTIME time) |
Send an extended message with absolute timeout. | |
RT_TASK * | rt_sendx_timed (RT_TASK *task, void *msg, int size, RTIME delay) |
Send an extended message with relative timeout. | |
RT_TASK * | rt_evdrpx (RT_TASK *task, void *msg, int size, int *len) |
Eavedrop (spy) the content of an extended message. | |
RT_TASK * | rt_receivex (RT_TASK *task, void *msg, int size, int *len) |
Receive an extended message. | |
RT_TASK * | rt_receivex_if (RT_TASK *task, void *msg, int size, int *len) |
Receive an extended message, only if the calling task is not blocked. | |
RT_TASK * | rt_receivex_until (RT_TASK *task, void *msg, int size, int *len, RTIME time) |
Receive an extended message with an absolute timeout. | |
RT_TASK * | rt_receivex_timed (RT_TASK *task, void *msg, int size, int *len, RTIME delay) |
Receive an extended message with a relative timeout. |
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Eavedrop (spy) the content of a message. rt_evdrp spies the content of a message from the task specified by task while leaving it on the queue. To actually receive the message any of the rt_receive function must be used specifically. If task is equal to 0, the caller eavdrops the first message of its receive queue, if any. rt_evdrp never blocks.
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Eavedrop (spy) the content of an extended message. rt_evdrpx spies the content of a message from the task specified by task while leaving it on the queue. To actually receive the message any of the rt_receivex function must be used specifically. If task is equal to 0, the caller eavdrops the first message of its receive queue, if any. rt_evdrpix never blocks.
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Receive a message. rt_receive gets a message from the task specified by task. If task is equal to 0, the caller accepts messages from any task. If there is a pending message, rt_receive does not block but can be preempted if the task that rt_sent the just received message has a higher priority. The task will not block if it receives rpced messages since rpcing tasks always waits for a returned message. Moreover it inheredits the highest priority of any rpcing task waiting on the receive queue. The receiving task will then recover its priority as explained in rt_return. Otherwise the caller task is blocked waiting for any message to be sent/rpced.
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Receive a message, only if the calling task is not blocked. rt_receive_if tries to get a message from the task specified by task. If task is equal to 0, the caller accepts messages from any task. The caller task is never blocked but can be preempted if the task that rt_sent the just received message has a higher priority. The task will not block if it receives rpced messages since rpcing tasks always waits for a returned message. Moreover it inheredits the highest priority of any rpcing task waiting on the receive queue. The receiving task will then recover its priority as explained in rt_return. Otherwise the caller task is blocked waiting for any message to be sent/rpced.
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Receive a message with a relative timeout. rt_receive_timed receives a message from the task specified by task. If task is equal to 0, the caller accepts messages from any task. If there is a pending message, rt_receive does not block but but can be preempted if the task that rt_sent the just received message has a higher priority. The task will not block if it receives rpced messages since rpcing tasks always waits for a returned message. Moreover it inheredits the highest priority of any rpcing task waiting on the receive queue. The receiving task will then recover its priority as explained in rt_return. Otherwise the caller task is blocked waiting for any message to be sent/rpced. In this case these functions return if: a sender sends a message and has a lower priority; any rpced message is received;
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Receive a message with an absolute timeout. rt_receive_until receives a message from the task specified by task. If task is equal to 0, the caller accepts messages from any task. If there is a pending message, rt_receive does not block but but can be preempted if the task that rt_sent the just received message has a higher priority. The task will not block if it receives rpced messages since rpcing tasks always waits for a returned message. Moreover it inheredits the highest priority of any rpcing task waiting on the receive queue. The receiving task will then recover its priority as explained in rt_return. Otherwise the caller task is blocked waiting for any message to be sent/rpced. In this case these functions return if: a sender sends a message and has a lower priority; any rpced message is received;
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Receive an extended message. rt_receivex gets an extended message msg of size size from the task specified by task task. If task is equal to 0, the caller accepts messages from any task. If there is a pending message, rt_receivex does not block but can be preempted if the task that rt_sent the just received message has a higher priority. The task will not block if it receives rpcxed messages since rpcxing tasks always wait for a returned message. Moreover it inheredits the highest priority of any rpcxing task waiting on the receive queue. The receiving task will then recover its priority as explained in rt_returnx. Otherwise the caller task is blocked waiting for any message to be sentx/rpcxed.
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Receive an extended message, only if the calling task is not blocked. rt_receivex gets an extended message msg of size size from the task specified by task task. If task is equal to 0, the caller accepts messages from any task. The caller task is never blocked but can be preempted if the task that rt_sentx the just received message has a higher priority. The task will not block if it receives rpcxed messages since rpcxing tasks always wait for a returned message. Moreover it inheredits the highest priority of any rpcxing task waiting on the receive queue. The receiving task will then recover its priority as explained in rt_returnx. Otherwise the caller task is blocked waiting for any message to be sentx/rpcxed.
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Receive an extended message with a relative timeout. rt_receivex_until gets an extended message msg of size size from the task specified by task task. If task is equal to 0, the caller accepts messages from any task. If there is a pending message, rt_receivex does not block but can be preempted if the task that rt_sent the just received message has a higher priority. The task will not block if it receives rpcxed messages since rpcxing tasks always wait for a returned message. Moreover it inheredits the highest priority of any rpcxing task waiting on the receive queue. The receiving task will then recover its priority as explained in rt_returnx. Otherwise the caller task is blocked waiting for any message to be sentx/rpcxed. In this case these functions return if: a sender sendxs a message and has a lower priority; any rpcxed message is received;
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Receive an extended message with an absolute timeout. rt_receivex_until gets an extended message msg of size size from the task specified by task task. If task is equal to 0, the caller accepts messages from any task. If there is a pending message, rt_receivex does not block but can be preempted if the task that rt_sent the just received message has a higher priority. The task will not block if it receives rpcxed messages since rpcxing tasks always wait for a returned message. Moreover it inheredits the highest priority of any rpcxing task waiting on the receive queue. The receiving task will then recover its priority as explained in rt_returnx. Otherwise the caller task is blocked waiting for any message to be sentx/rpcxed. In this case these functions return if: a sender sendxs a message and has a lower priority; any rpcxed message is received;
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Send a message. rt_send sends the message msg to the task task. If the receiver task is ready to get the message rt_send does not block the sending task, but its execution can be preempted if the receiving task has a higher priority. Otherwise the caller task is blocked and queued up in priority order on the receive list of the sent task.
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Send a message, only if the calling task will not be blocked. rt_send_if sends the message msg to the task task if the latter is ready to receive, so that the caller task is never blocked, but its execution can be preempted if the receiving task is ready to receive and has a higher priority.
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brief Send a message with a relative timeout. rt_send_timed sends the message msg to the task task. If the receiver task is ready to get the message, this function does not block the sending task, but its execution can be preempted if the receiving task has a higher priority. Otherwise the caller task is blocked and queued up in priority order on the receive list of the sent task. In this case the function returns if:
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brief Send a message with an absolute timeout. rt_send_until sends the message msg to the task task. If the receiver task is ready to get the message, this function does not block the sending task, but its execution can be preempted if the receiving task has a higher priority. Otherwise the caller task is blocked and queued up in priority order on the receive list of the sent task. In this case the function returns if:
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Send an extended message. rt_sendx sends an arbitrary message msg of size size bytes to the task task. If the receiver task is ready to get the message rt_sendx does not block the sending task, but its execution can be preempted if the receiving task has a higher priority. Otherwise the caller task is blocked and queued up in priority order on the receive list of the sent task.
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Send an extended message, only if the calling task will not be blocked. rt_sendx_if sends an arbitrary message msg of size size bytes to the task task if the latter is ready to receive. So the caller task in never blocked but its execution can be preempted if the receiving task has a higher priority.
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Send an extended message with relative timeout. rt_sendx_until sends an arbitrary message msg of size size bytes to the task task. If the receiver task is ready to get the message rt_sendx_until does not block the sending task, but its execution can be preempted if the receiving task has a higher priority. Otherwise the caller task is blocked and queued up in priority order on the receive list of the sent task. In this case the function returns if:
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Send an extended message with absolute timeout. rt_sendx_until sends an arbitrary message msg of size size bytes to the task task. If the receiver task is ready to get the message rt_sendx_until does not block the sending task, but its execution can be preempted if the receiving task has a higher priority. Otherwise the caller task is blocked and queued up in priority order on the receive list of the sent task. In this case the function returns if:
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