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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_atomicset.rst | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | docs/nspr/reference/pr_atomicset.rst | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/docs/nspr/reference/pr_atomicset.rst b/docs/nspr/reference/pr_atomicset.rst new file mode 100644 index 0000000000..3c9df0b1b9 --- /dev/null +++ b/docs/nspr/reference/pr_atomicset.rst @@ -0,0 +1,42 @@ +PR_AtomicSet +============ + +Atomically sets a 32-bit value and return its previous contents. + + +Syntax +------ + +.. code:: + + #include <pratom.h> + + PRInt32 PR_AtomicSet( + PRInt32 *val, + PRInt32 newval); + + +Parameters +~~~~~~~~~~ + +The function has the following parameter: + +``val`` + A pointer to the value to be set. +``newval`` + The new value to assign to the ``val`` parameter. + + +Returns +~~~~~~~ + +The function returns the prior value of the referenced variable. + + +Description +----------- + +:ref:`PR_AtomicSet` first reads the value of var, then updates it with the +supplied value. The returned value is the value that was read\ *before* +memory was updated. The memory modification is unconditional--that is, +it isn't a test and set operation. |