On Sunday, February 03, 2013 10:38:37 AM z...@apache.org wrote: > TS-1006: Add a new wrapper: ink_atomic_decrement() > > This is a wrapper of __sync_fetch_and_sub() in GNU env.
And what about non-GNU environments? > I need this wrapper in reclaimable freelist, as ink_atomic_increment() > can't work correctly in some situation by unknown reason. > > Signed-off-by: Yunkai Zhang <qiushu....@taobao.com> > Signed-off-by: Zhao Yongming <ming....@gmail.com> > > > Project: http://git-wip-us.apache.org/repos/asf/trafficserver/repo > Commit: http://git-wip-us.apache.org/repos/asf/trafficserver/commit/4397abf7 > Tree: http://git-wip-us.apache.org/repos/asf/trafficserver/tree/4397abf7 > Diff: http://git-wip-us.apache.org/repos/asf/trafficserver/diff/4397abf7 > > Branch: refs/heads/master > Commit: 4397abf76c4fbb7babccc9cc11b0456f2a7a1516 > Parents: 5d8cc8a > Author: Yunkai Zhang <qiushu....@taobao.com> > Authored: Sat Feb 2 17:08:18 2013 +0800 > Committer: Zhao Yongming <ming....@gmail.com> > Committed: Sun Feb 3 10:52:58 2013 +0800 > > ---------------------------------------------------------------------- > lib/ts/ink_atomic.h | 9 ++++++++- > 1 files changed, 8 insertions(+), 1 deletions(-) > ---------------------------------------------------------------------- > > > http://git-wip-us.apache.org/repos/asf/trafficserver/blob/4397abf7/lib/ts/in > k_atomic.h > ---------------------------------------------------------------------- diff > --git a/lib/ts/ink_atomic.h b/lib/ts/ink_atomic.h > index b22cf24..9425eec 100644 > --- a/lib/ts/ink_atomic.h > +++ b/lib/ts/ink_atomic.h > @@ -160,6 +160,13 @@ ink_atomic_increment(volatile Type * mem, Amount count) > { return __sync_fetch_and_add(mem, (Type)count); > } > > +// ink_atomic_decrement(ptr, count) > +// Decrement @ptr by @count, returning the previous value. > +template <typename Type, typename Amount> static inline Type > +ink_atomic_decrement(volatile Type * mem, Amount count) { > + return __sync_fetch_and_sub(mem, (Type)count); > +} > + > // Special hacks for ARM 32-bit > #if defined(__arm__) && (SIZEOF_VOIDP == 4) > extern ProcessMutex __global_death; > @@ -213,6 +220,6 @@ ink_atomic_increment<int64_t>(pvint64 mem, int value) { > > #else /* not gcc > v4.1.2 */ > #error Need a compiler / libc that supports atomic operations, e.g. gcc > v4.1.2 or later -#endif > +#endif > > #endif /* _ink_atomic_h_ */
