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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2020-06-15 14:13:48 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2020-06-18 07:13:13 +0200 |
| commit | 1f8301a97296178c772fcf42ae1d2e78b9ac40a8 (patch) | |
| tree | f23afc9579df88b2e4b2f874643badfa83758a3c /c-user/semaphore_manager.rst | |
| parent | c-user: Use * for list items (diff) | |
| download | rtems-docs-1f8301a97296178c772fcf42ae1d2e78b9ac40a8.tar.bz2 | |
c-user: Mention possible preemptions
Mention that object create/delete may case the calling task to be
preempted due to the object allocator mutex.
Diffstat (limited to 'c-user/semaphore_manager.rst')
| -rw-r--r-- | c-user/semaphore_manager.rst | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/c-user/semaphore_manager.rst b/c-user/semaphore_manager.rst index 3e6008d..13058f3 100644 --- a/c-user/semaphore_manager.rst +++ b/c-user/semaphore_manager.rst @@ -376,7 +376,8 @@ DESCRIPTION: are serviced in First In-First Out order. NOTES: - This directive will not cause the calling task to be preempted. + This directive may cause the calling task to be preempted due to an + obtain and release of the object allocator mutex. The priority inheritance and priority ceiling algorithms are only supported for local, binary semaphores that use the priority task wait queue blocking @@ -523,6 +524,9 @@ DESCRIPTION: this semaphore is reclaimed by RTEMS. NOTES: + This directive may cause the calling task to be preempted due to an + obtain and release of the object allocator mutex. + The calling task will be preempted if it is enabled by the task's execution mode and a higher priority local task is waiting on the deleted semaphore. The calling task will NOT be preempted if all of the tasks that are waiting |