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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /docs/nspr/reference/pr_waitsemaphore.rst | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/nspr/reference/pr_waitsemaphore.rst')
-rw-r--r-- | docs/nspr/reference/pr_waitsemaphore.rst | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/docs/nspr/reference/pr_waitsemaphore.rst b/docs/nspr/reference/pr_waitsemaphore.rst new file mode 100644 index 0000000000..1a0c7b3d1c --- /dev/null +++ b/docs/nspr/reference/pr_waitsemaphore.rst @@ -0,0 +1,42 @@ +PR_WaitSemaphore +================ + +Returns the value of the environment variable. + + +Syntax +------ + +.. code:: + + #include <pripcsem.h> + + NSPR_API(PRStatus) PR_WaitSemaphore(PRSem *sem); + + +Parameter +~~~~~~~~~ + +The function has the following parameter: + +``sem`` + A pointer to a ``PRSem`` structure returned from a call to + :ref:`PR_OpenSemaphore`. + + +Returns +~~~~~~~ + +:ref:`PRStatus` + + +Description +----------- + +:ref:`PR_WaitSemaphore` tests the value of the semaphore. If the value of +the semaphore is > 0, the value of the semaphore is decremented and the +function returns. If the value of the semaphore is 0, the function +blocks until the value becomes > 0, then the semaphore is decremented +and the function returns. + +The "test and decrement" operation is performed atomically. |