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| author | Andrew MacLeod <amacleod@redhat.com> | 2011-11-10 22:46:25 +0000 |
|---|---|---|
| committer | Andrew Macleod <amacleod@gcc.gnu.org> | 2011-11-10 22:46:25 +0000 |
| commit | 1aabd05ec017fa10e3a425fff112f81005dd0fe7 (patch) | |
| tree | fcf4c661d1729f4cfa5bd6f22b12bb73388b1719 /gcc/doc | |
| parent | 99c18869efe4d723a5c715696b65cd833dfee531 (diff) | |
| download | gcc-1aabd05ec017fa10e3a425fff112f81005dd0fe7.zip gcc-1aabd05ec017fa10e3a425fff112f81005dd0fe7.tar.gz gcc-1aabd05ec017fa10e3a425fff112f81005dd0fe7.tar.bz2 | |
extend.texi: Document __atomic_test_and_set and __atomic_clear.
2011-11-10 Andrew MacLeod <amacleod@redhat.com>
* doc/extend.texi: Document __atomic_test_and_set and __atomic_clear.
From-SVN: r181273
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/extend.texi | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index c7e8ede..15238c1 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -7002,6 +7002,27 @@ All memory models are valid. @end deftypefn +@deftypefn {Built-in Function} bool __atomic_test_and_set (bool *ptr, int memmodel) + +This built-in function performs an atomic test-and-set operation on +@code{*@var{ptr}}. @code{*@var{ptr}} is set to the value 1 and +the previous contents are returned. + +All memory models are valid. + +@end deftypefn + +@deftypefn {Built-in Function} void __atomic_clear (bool *ptr, int memmodel) + +This built-in function performs an atomic clear operation on +@code{*@var{ptr}}. After the operation, @code{*@var{ptr}} will contain 0. + +The valid memory model variants are +@code{__ATOMIC_RELAXED}, @code{__ATOMIC_SEQ_CST}, and +@code{__ATOMIC_RELEASE}. + +@end deftypefn + @deftypefn {Built-in Function} void __atomic_thread_fence (int memmodel) This built-in function acts as a synchronization fence between threads |