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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_callonce.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_callonce.rst')
-rw-r--r-- | docs/nspr/reference/pr_callonce.rst | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/docs/nspr/reference/pr_callonce.rst b/docs/nspr/reference/pr_callonce.rst new file mode 100644 index 0000000000..912f1a3ac3 --- /dev/null +++ b/docs/nspr/reference/pr_callonce.rst @@ -0,0 +1,35 @@ +PR_CallOnce +=========== + +Ensures that subsystem initialization occurs only once. + + +Syntax +------ + +.. code:: + + PRStatus PR_CallOnce( + PRCallOnceType *once, + PRCallOnceFN func); + + +Parameters +~~~~~~~~~~ + +:ref:`PR_CallOnce` has these parameters: + +``once`` + A pointer to an object of type :ref:`PRCallOnceType`. Initially (before + any threading issues exist), the object must be initialized to all + zeros. From that time on, the client should consider the object + read-only (or even opaque) and allow the runtime to manipulate its + content appropriately. +``func`` + A pointer to the function the calling client has designed to perform + the subsystem initialization. The function will be called once, at + most, for each subsystem to be initialized. It should return a + :ref:`PRStatus` indicating the result of the initialization process. + While the first thread executes this function, other threads + attempting the same initialization will be blocked until it has been + completed. |