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| author | Michael Stapelberg <stapelberg@debian.org> | 2013-03-04 21:27:36 +0100 |
|---|---|---|
| committer | Michael Stapelberg <michael@stapelberg.de> | 2013-03-04 21:27:36 +0100 |
| commit | 04b08da9af0c450d645ab7389d1467308cfc2db8 (patch) | |
| tree | db247935fa4f2f94408edc3acd5d0d4f997aa0d8 /src/pkg/runtime/atomic_386.c | |
| parent | 917c5fb8ec48e22459d77e3849e6d388f93d3260 (diff) | |
| download | golang-upstream/1.1_hg20130304.tar.gz | |
Imported Upstream version 1.1~hg20130304upstream/1.1_hg20130304
Diffstat (limited to 'src/pkg/runtime/atomic_386.c')
| -rw-r--r-- | src/pkg/runtime/atomic_386.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/pkg/runtime/atomic_386.c b/src/pkg/runtime/atomic_386.c index a4f2a114f..79b7cbf96 100644 --- a/src/pkg/runtime/atomic_386.c +++ b/src/pkg/runtime/atomic_386.c @@ -17,3 +17,16 @@ runtime·atomicloadp(void* volatile* addr) { return *addr; } + +#pragma textflag 7 +uint64 +runtime·xadd64(uint64 volatile* addr, int64 v) +{ + uint64 old; + + old = *addr; + while(!runtime·cas64(addr, &old, old+v)) { + // nothing + } + return old+v; +} |