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Change return value of cmpxchg atomic op to pa_bool_t

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This commit is contained in:
Lennart Poettering 2008-08-29 20:24:46 +02:00
parent d10e5e56d3
commit ca38446e6b
1 changed files with 16 additions and 14 deletions
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30
src/pulsecore/atomic.h
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@ -23,6 +23,8 @@
USA. USA.
***/ ***/
#include <pulsecore/macro.h>
/* /*
* atomic_ops guarantees us that sizeof(AO_t) == sizeof(void*). It is * atomic_ops guarantees us that sizeof(AO_t) == sizeof(void*). It is
* not guaranteed however, that sizeof(AO_t) == sizeof(size_t). * not guaranteed however, that sizeof(AO_t) == sizeof(size_t).
@ -35,7 +37,7 @@
* On gcc >= 4.1 we use the builtin atomic functions. otherwise we use * On gcc >= 4.1 we use the builtin atomic functions. otherwise we use
* libatomic_ops * libatomic_ops
*/ */
#
#ifndef PACKAGE #ifndef PACKAGE
#error "Please include config.h before including this file!" #error "Please include config.h before including this file!"
#endif #endif
@ -80,8 +82,8 @@ static inline int pa_atomic_dec(pa_atomic_t *a) {
return pa_atomic_sub(a, 1); return pa_atomic_sub(a, 1);
} }
/* Returns non-zero when the operation was successful. */ /* Returns TRUE when the operation was successful. */
static inline int pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) { static inline pa_bool_t pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) {
return __sync_bool_compare_and_swap(&a->value, old_i, new_i); return __sync_bool_compare_and_swap(&a->value, old_i, new_i);
} }
@ -101,7 +103,7 @@ static inline void pa_atomic_ptr_store(pa_atomic_ptr_t *a, void *p) {
__sync_synchronize(); __sync_synchronize();
} }
static inline int pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) { static inline pa_bool_t pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) {
return __sync_bool_compare_and_swap(&a->value, (long) old_p, (long) new_p); return __sync_bool_compare_and_swap(&a->value, (long) old_p, (long) new_p);
} }
@ -147,7 +149,7 @@ static inline int pa_atomic_dec(pa_atomic_t *a) {
return pa_atomic_sub(a, 1); return pa_atomic_sub(a, 1);
} }
static inline int pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) { static inline pa_bool_t pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) {
int result; int result;
__asm__ __volatile__ ("lock; cmpxchgl %2, %1" __asm__ __volatile__ ("lock; cmpxchgl %2, %1"
@ -171,14 +173,14 @@ static inline void pa_atomic_ptr_store(pa_atomic_ptr_t *a, void *p) {
a->value = (unsigned long) p; a->value = (unsigned long) p;
} }
static inline int pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) { static inline pa_bool_t pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) {
void *result; void *result;
__asm__ __volatile__ ("lock; cmpxchgq %q2, %1" __asm__ __volatile__ ("lock; cmpxchgq %q2, %1"
: "=a" (result), "=m" (a->value) : "=a" (result), "=m" (a->value)
: "r" (new_p), "m" (a->value), "0" (old_p)); : "r" (new_p), "m" (a->value), "0" (old_p));
return result; return result == old_p;
} }
#elif defined(ATOMIC_ARM_INLINE_ASM) #elif defined(ATOMIC_ARM_INLINE_ASM)
@ -255,7 +257,7 @@ static inline int pa_atomic_dec(pa_atomic_t *a) {
return pa_atomic_sub(a, 1); return pa_atomic_sub(a, 1);
} }
static inline int pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) { static inline pa_bool_t pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) {
unsigned long not_equal, not_exclusive; unsigned long not_equal, not_exclusive;
pa_memory_barrier(); pa_memory_barrier();
@ -289,7 +291,7 @@ static inline void pa_atomic_ptr_store(pa_atomic_ptr_t *a, void *p) {
pa_memory_barrier(); pa_memory_barrier();
} }
static inline int pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) { static inline pa_bool_t pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) {
unsigned long not_equal, not_exclusive; unsigned long not_equal, not_exclusive;
pa_memory_barrier(); pa_memory_barrier();
@ -377,8 +379,8 @@ static inline int pa_atomic_dec(pa_atomic_t *a) {
return pa_atomic_sub(a, 1); return pa_atomic_sub(a, 1);
} }
/* Returns non-zero when the operation was successful. */ /* Returns TRUE when the operation was successful. */
static inline int pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) { static inline pa_bool_t pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) {
pa_bool_t failed; pa_bool_t failed;
do { do {
failed = !!__kernel_cmpxchg(old_i, new_i, &a->value); failed = !!__kernel_cmpxchg(old_i, new_i, &a->value);
@ -402,7 +404,7 @@ static inline void pa_atomic_ptr_store(pa_atomic_ptr_t *a, void *p) {
pa_memory_barrier(); pa_memory_barrier();
} }
static inline int pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) { static inline pa_bool_t pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) {
pa_bool_t failed; pa_bool_t failed;
do { do {
failed = !!__kernel_cmpxchg_u((unsigned long) old_p, (unsigned long) new_p, &a->value); failed = !!__kernel_cmpxchg_u((unsigned long) old_p, (unsigned long) new_p, &a->value);
@ -446,7 +448,7 @@ static inline int pa_atomic_dec(pa_atomic_t *a) {
return (int) AO_fetch_and_sub1_full(&a->value); return (int) AO_fetch_and_sub1_full(&a->value);
} }
static inline int pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) { static inline pa_bool_t pa_atomic_cmpxchg(pa_atomic_t *a, int old_i, int new_i) {
return AO_compare_and_swap_full(&a->value, (unsigned long) old_i, (unsigned long) new_i); return AO_compare_and_swap_full(&a->value, (unsigned long) old_i, (unsigned long) new_i);
} }
@ -464,7 +466,7 @@ static inline void pa_atomic_ptr_store(pa_atomic_ptr_t *a, void *p) {
AO_store_full(&a->value, (AO_t) p); AO_store_full(&a->value, (AO_t) p);
} }
static inline int pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) { static inline pa_bool_t pa_atomic_ptr_cmpxchg(pa_atomic_ptr_t *a, void *old_p, void* new_p) {
return AO_compare_and_swap_full(&a->value, (AO_t) old_p, (AO_t) new_p); return AO_compare_and_swap_full(&a->value, (AO_t) old_p, (AO_t) new_p);
} }