| Message ID | 1460730231-1184-6-git-send-email-alex.bennee@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 15/04/16 17:23, Alex Bennée wrote: > Useful for counting down. > > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Sergey Fedorov <sergey.fedorov@linaro.org> > --- > include/qemu/atomic.h | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h > index 8f1d8d9..5dba7db 100644 > --- a/include/qemu/atomic.h > +++ b/include/qemu/atomic.h > @@ -131,6 +131,8 @@ > #define atomic_fetch_and(ptr, n) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST) > #define atomic_fetch_or(ptr, n) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST) > > +#define atomic_dec_fetch(ptr) __atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST) > + > /* And even shorter names that return void. */ > #define atomic_inc(ptr) ((void) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST)) > #define atomic_dec(ptr) ((void) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST)) > @@ -326,6 +328,8 @@ > #define atomic_fetch_or __sync_fetch_and_or > #define atomic_cmpxchg __sync_val_compare_and_swap > > +#define atomic_dec_fetch(ptr) __sync_sub_and_fetch(ptr, 1) > + > /* And even shorter names that return void. */ > #define atomic_inc(ptr) ((void) __sync_fetch_and_add(ptr, 1)) > #define atomic_dec(ptr) ((void) __sync_fetch_and_add(ptr, -1))
diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h index 8f1d8d9..5dba7db 100644 --- a/include/qemu/atomic.h +++ b/include/qemu/atomic.h @@ -131,6 +131,8 @@ #define atomic_fetch_and(ptr, n) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST) #define atomic_fetch_or(ptr, n) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST) +#define atomic_dec_fetch(ptr) __atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST) + /* And even shorter names that return void. */ #define atomic_inc(ptr) ((void) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST)) #define atomic_dec(ptr) ((void) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST)) @@ -326,6 +328,8 @@ #define atomic_fetch_or __sync_fetch_and_or #define atomic_cmpxchg __sync_val_compare_and_swap +#define atomic_dec_fetch(ptr) __sync_sub_and_fetch(ptr, 1) + /* And even shorter names that return void. */ #define atomic_inc(ptr) ((void) __sync_fetch_and_add(ptr, 1)) #define atomic_dec(ptr) ((void) __sync_fetch_and_add(ptr, -1))
Useful for counting down. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> --- include/qemu/atomic.h | 4 ++++ 1 file changed, 4 insertions(+)