| author | Rich Felker <dalias@aerifal.cx> | 2013年09月22日 03:06:17 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2013年09月22日 03:06:17 -0400 |
| commit | 35a6801c6cd31b8ace4a7c7fc138170434b6754f (patch) | |
| tree | e1dc90e121b1850fd7a2cc9ffd8670368e3db47a | |
| parent | e803829e6b087c0ed91adc11f87185109bc59b31 (diff) | |
| download | musl-35a6801c6cd31b8ace4a7c7fc138170434b6754f.tar.gz | |
| -rw-r--r-- | arch/arm/atomic.h | 14 |
diff --git a/arch/arm/atomic.h b/arch/arm/atomic.h index 94efe5a0..734d2871 100644 --- a/arch/arm/atomic.h +++ b/arch/arm/atomic.h @@ -22,11 +22,13 @@ static inline int a_ctz_64(uint64_t x) return a_ctz_l(y); } +#define __k_cas ((int (*)(int, int, volatile int *))0xffff0fc0) + static inline int a_cas(volatile int *p, int t, int s) { int old; for (;;) { - if (!((int (*)(int, int, volatile int *))0xffff0fc0)(t, s, p)) + if (!__k_cas(t, s, p)) return t; if ((old=*p) != t) return old; @@ -47,7 +49,7 @@ static inline int a_swap(volatile int *x, int v) { int old; do old = *x; - while (a_cas(x, old, v) != old); + while (__k_cas(old, v, x)); return old; } @@ -55,7 +57,7 @@ static inline int a_fetch_add(volatile int *x, int v) { int old; do old = *x; - while (a_cas(x, old, old+v) != old); + while (__k_cas(old, old+v, x)); return old; } @@ -71,7 +73,7 @@ static inline void a_dec(volatile int *x) static inline void a_store(volatile int *p, int x) { - *p=x; + while (__k_cas(*p, x, p)); } static inline void a_spin() @@ -87,14 +89,14 @@ static inline void a_and(volatile int *p, int v) { int old; do old = *p; - while (a_cas(p, old, old&v) != old); + while (__k_cas(old, old&v, p)); } static inline void a_or(volatile int *p, int v) { int old; do old = *p; - while (a_cas(p, old, old|v) != old); + while (__k_cas(old, old|v, p)); } static inline void a_or_l(volatile void *p, long v) |