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atomic: add and sub return their result

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Signed-off-by: Casey Bodley <casey@linuxbox.com>
Signed-off-by: Matt Benjamin <matt@cohortfs.com>
This commit is contained in:
Casey Bodley 2014-09-04 11:10:46 -04:00 committed by Matt Benjamin
parent 0f6b9f2816
commit a39cbe2b6f
1 changed files with 4 additions and 4 deletions
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8
src/include/atomic.h
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@ -100,12 +100,12 @@ namespace ceph {
AO_t dec() {
return AO_fetch_and_sub1_write(&val) - 1;
}
void add(AO_t add_me) {
AO_fetch_and_add(&val, add_me);
AO_t add(AO_t add_me) {
return AO_fetch_and_add(&val, add_me) + add_me;
}
void sub(AO_t sub_me) {
AO_t sub(AO_t sub_me) {
AO_t negsub = 0 - sub_me;
AO_fetch_and_add_write(&val, (AO_t)negsub);
return AO_fetch_and_add_write(&val, negsub) + negsub;
}
AO_t read() const {
// cast away const on the pointer. this is only needed to build