diff options
Diffstat (limited to 'include/atomic.h')
| -rw-r--r-- | include/atomic.h | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/include/atomic.h b/include/atomic.h index 3a662f8e..4dff05da 100644 --- a/include/atomic.h +++ b/include/atomic.h @@ -22,9 +22,11 @@ extern "C" { #define almemory_order_seq_cst memory_order_seq_cst #define ATOMIC(T) T _Atomic +#define ATOMIC_FLAG atomic_flag #define ATOMIC_INIT(_val, _newval) atomic_init((_val), (_newval)) #define ATOMIC_INIT_STATIC(_newval) ATOMIC_VAR_INIT(_newval) +/*#define ATOMIC_FLAG_INIT ATOMIC_FLAG_INIT*/ #define PARAM2(f, a, b, ...) (f((a), (b))) #define PARAM3(f, a, b, c, ...) (f((a), (b), (c))) @@ -42,6 +44,11 @@ extern "C" { #define ATOMIC_COMPARE_EXCHANGE_WEAK(T, ...) \ PARAM5(atomic_compare_exchange_weak_explicit, __VA_ARGS__, memory_order_seq_cst, memory_order_seq_cst) +#define ATOMIC_FLAG_TEST_AND_SET(...) \ + PARAM2(atomic_flag_test_and_set_explicit, __VA_ARGS__, memory_order_seq_cst) +#define ATOMIC_FLAG_CLEAR(...) \ + PARAM2(atomic_flag_clear_explicit, __VA_ARGS__, memory_order_seq_cst) + #define ATOMIC_THREAD_FENCE atomic_thread_fence /* Atomics using GCC intrinsics */ @@ -57,9 +64,11 @@ enum almemory_order { }; #define ATOMIC(T) struct { T volatile value; } +#define ATOMIC_FLAG ATOMIC(int) #define ATOMIC_INIT(_val, _newval) do { (_val)->value = (_newval); } while(0) #define ATOMIC_INIT_STATIC(_newval) {(_newval)} +#define ATOMIC_FLAG_INIT ATOMIC_INIT_STATIC(0) #define ATOMIC_LOAD(_val, ...) __extension__({ \ __typeof((_val)->value) _r = (_val)->value; \ @@ -76,6 +85,7 @@ enum almemory_order { #define ATOMIC_EXCHANGE(T, _val, _newval, ...) __extension__({ \ static_assert(sizeof(T)==sizeof((_val)->value), "Type "#T" has incorrect size!"); \ + __asm__ __volatile__("" ::: "memory"); \ __sync_lock_test_and_set(&(_val)->value, (_newval)); \ }) #define ATOMIC_COMPARE_EXCHANGE_STRONG(T, _val, _oldval, _newval, ...) __extension__({ \ @@ -85,6 +95,16 @@ enum almemory_order { *(_oldval) == _o; \ }) +#define ATOMIC_FLAG_TEST_AND_SET(_val, ...) __extension__({ \ + __asm__ __volatile__("" ::: "memory"); \ + __sync_lock_test_and_set(&(_val)->value, 1); \ +}) +#define ATOMIC_FLAG_CLEAR(_val, ...) __extension__({ \ + __sync_lock_release(&(_val)->value); \ + __asm__ __volatile__("" ::: "memory"); \ +}) + + #define ATOMIC_THREAD_FENCE(order) do { \ enum { must_be_constant = (order) }; \ const int _o = must_be_constant; \ @@ -297,19 +317,23 @@ int _al_invalid_atomic_size(); /* not defined */ #define ATOMIC(T) T +#define ATOMIC_INIT(_val, _newval) ((void)0) #define ATOMIC_INIT_STATIC(_newval) (0) -#define ATOMIC_LOAD_UNSAFE(_val) (0) -#define ATOMIC_STORE_UNSAFE(_val, _newval) ((void)0) +#define ATOMIC_LOAD(...) (0) +#define ATOMIC_STORE(...) ((void)0) -#define ATOMIC_LOAD(_val, ...) (0) -#define ATOMIC_STORE(_val, _newval, ...) ((void)0) +#define ATOMIC_ADD(...) (0) +#define ATOMIC_SUB(...) (0) -#define ATOMIC_ADD(_val, _incr, ...) (0) -#define ATOMIC_SUB(_val, _decr, ...) (0) +#define ATOMIC_EXCHANGE(T, ...) (0) +#define ATOMIC_COMPARE_EXCHANGE_STRONG(T, ...) (0) +#define ATOMIC_COMPARE_EXCHANGE_WEAK(T, ...) (0) -#define ATOMIC_EXCHANGE(T, _val, _newval, ...) (0) -#define ATOMIC_COMPARE_EXCHANGE_STRONG(T, _val, _oldval, _newval, ...) (0) +#define ATOMIC_FLAG_TEST_AND_SET(...) (0) +#define ATOMIC_FLAG_CLEAR(...) ((void)0) + +#define ATOMIC_THREAD_FENCE ((void)0) #endif /* If no weak cmpxchg is provided (not all systems will have one), substitute a @@ -318,6 +342,18 @@ int _al_invalid_atomic_size(); /* not defined */ #define ATOMIC_COMPARE_EXCHANGE_WEAK ATOMIC_COMPARE_EXCHANGE_STRONG #endif +/* If no ATOMIC_FLAG is defined, simulate one with an atomic int using exchange + * and store ops. + */ +#ifndef ATOMIC_FLAG +#define ATOMIC_FLAG ATOMIC(int) +#define ATOMIC_FLAG_INIT ATOMIC_INIT_STATIC(0) +#define ATOMIC_FLAG_TEST_AND_SET_(_val, ...) ATOMIC_EXCHANGE(int, _val, 1, __VA_ARGS__) +#define ATOMIC_FLAG_TEST_AND_SET(...) ATOMIC_FLAG_TEST_AND_SET_(__VA_ARGS__, almemory_order_seq_cst) +#define ATOMIC_FLAG_CLEAR_(_val, ...) ATOMIC_STORE(_val, 0, __VA_ARGS__) +#define ATOMIC_FLAG_CLEAR(...) ATOMIC_FLAG_CLEAR_(__VA_ARGS__, almemory_order_seq_cst) +#endif + typedef unsigned int uint; typedef ATOMIC(uint) RefCount; |