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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /docs/nspr/reference/pr_notifycondvar.rst | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/nspr/reference/pr_notifycondvar.rst')
-rw-r--r-- | docs/nspr/reference/pr_notifycondvar.rst | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/docs/nspr/reference/pr_notifycondvar.rst b/docs/nspr/reference/pr_notifycondvar.rst new file mode 100644 index 0000000000..e7289d9b06 --- /dev/null +++ b/docs/nspr/reference/pr_notifycondvar.rst @@ -0,0 +1,49 @@ +PR_NotifyCondVar +================ + +Notifies a condition variable of a change in its associated monitored +data. + + +Syntax +------ + +.. code:: + + #include <prcvar.h> + + PRStatus PR_NotifyCondVar(PRCondVar *cvar); + + +Parameter +~~~~~~~~~ + +:ref:`PR_NotifyCondVar` has one parameter: + +``cvar`` + The condition variable to notify. + + +Returns +~~~~~~~ + +The function returns one of the following values: + +- If successful, ``PR_SUCCESS``. +- If unsuccessful (for example, if the caller has not locked the lock + associated with the condition variable), ``PR_FAILURE``. + + +Description +----------- + +The calling thread must hold the lock that protects the condition, as +well as the invariants that are tightly bound to the condition. + +Notification of a condition variable signals a change of state in some +monitored data. When the notification occurs, the runtime promotes a +thread that is waiting on the condition variable to a ready state. If +more than one thread is waiting, the selection of which thread gets +promoted cannot be predicted. This implies that all threads waiting on a +single condition variable must have the same semantics. If no thread is +waiting on the condition variable, the notify operation is a no-op. |