*
*/
+#include "no_extern_c.h"
+
#ifndef U_ATOMIC_H
#define U_ATOMIC_H
#include <stdbool.h>
+#include <stdint.h>
/* Favor OS-provided implementations.
*
#define PIPE_ATOMIC "GCC Sync Intrinsics"
+#if defined(USE_GCC_ATOMIC_BUILTINS)
+
+/* The builtins with explicit memory model are available since GCC 4.7. */
+#define p_atomic_set(_v, _i) __atomic_store_n((_v), (_i), __ATOMIC_RELEASE)
+#define p_atomic_read(_v) __atomic_load_n((_v), __ATOMIC_ACQUIRE)
+#define p_atomic_dec_zero(v) (__atomic_sub_fetch((v), 1, __ATOMIC_ACQ_REL) == 0)
+#define p_atomic_inc(v) (void) __atomic_add_fetch((v), 1, __ATOMIC_ACQ_REL)
+#define p_atomic_dec(v) (void) __atomic_sub_fetch((v), 1, __ATOMIC_ACQ_REL)
+#define p_atomic_add(v, i) (void) __atomic_add_fetch((v), (i), __ATOMIC_ACQ_REL)
+#define p_atomic_inc_return(v) __atomic_add_fetch((v), 1, __ATOMIC_ACQ_REL)
+#define p_atomic_dec_return(v) __atomic_sub_fetch((v), 1, __ATOMIC_ACQ_REL)
+#define p_atomic_add_return(v, i) __atomic_add_fetch((v), (i), __ATOMIC_ACQ_REL)
+#define p_atomic_xchg(v, i) __atomic_exchange_n((v), (i), __ATOMIC_ACQ_REL)
+#define PIPE_NATIVE_ATOMIC_XCHG
+
+#else
+
#define p_atomic_set(_v, _i) (*(_v) = (_i))
#define p_atomic_read(_v) (*(_v))
#define p_atomic_dec_zero(v) (__sync_sub_and_fetch((v), 1) == 0)
#define p_atomic_inc(v) (void) __sync_add_and_fetch((v), 1)
#define p_atomic_dec(v) (void) __sync_sub_and_fetch((v), 1)
+#define p_atomic_add(v, i) (void) __sync_add_and_fetch((v), (i))
#define p_atomic_inc_return(v) __sync_add_and_fetch((v), 1)
#define p_atomic_dec_return(v) __sync_sub_and_fetch((v), 1)
+#define p_atomic_add_return(v, i) __sync_add_and_fetch((v), (i))
+
+#endif
+
+/* There is no __atomic_* compare and exchange that returns the current value.
+ * Also, GCC 5.4 seems unable to optimize a compound statement expression that
+ * uses an additional stack variable with __atomic_compare_exchange[_n].
+ */
#define p_atomic_cmpxchg(v, old, _new) \
__sync_val_compare_and_swap((v), (old), (_new))
#define p_atomic_dec_zero(_v) (p_atomic_dec_return(_v) == 0)
#define p_atomic_inc(_v) ((void) p_atomic_inc_return(_v))
#define p_atomic_dec(_v) ((void) p_atomic_dec_return(_v))
+#define p_atomic_add(_v, _i) ((void) p_atomic_add_return((_v), (_i)))
#define p_atomic_inc_return(_v) (++(*(_v)))
#define p_atomic_dec_return(_v) (--(*(_v)))
+#define p_atomic_add_return(_v, _i) (*(_v) = *(_v) + (_i))
#define p_atomic_cmpxchg(_v, _old, _new) (*(_v) == (_old) ? (*(_v) = (_new), (_old)) : *(_v))
#endif
#define PIPE_ATOMIC "MSVC Intrinsics"
-/* We use the Windows header's Interlocked* functions instead of the
- * _Interlocked* intrinsics wherever we can, as support for the latter varies
+/* We use the Windows header's Interlocked*64 functions instead of the
+ * _Interlocked*64 intrinsics wherever we can, as support for the latter varies
* with target CPU, whereas Windows headers take care of all portability
* issues: using intrinsics where available, falling back to library
* implementations where not.
#include <intrin.h>
#include <assert.h>
-#pragma intrinsic(_InterlockedCompareExchange8)
-
/* MSVC supports decltype keyword, but it's only supported on C++ and doesn't
* quite work here; and if a C++-only solution is worthwhile, then it would be
* better to use templates / function overloading, instead of decltype magic.
((void) p_atomic_inc_return(_v))
#define p_atomic_inc_return(_v) (\
- sizeof *(_v) == sizeof(short) ? InterlockedIncrement16((short *) (_v)) : \
- sizeof *(_v) == sizeof(long) ? InterlockedIncrement ((long *) (_v)) : \
- sizeof *(_v) == sizeof(__int64) ? InterlockedIncrement64((__int64 *)(_v)) : \
+ sizeof *(_v) == sizeof(short) ? _InterlockedIncrement16((short *) (_v)) : \
+ sizeof *(_v) == sizeof(long) ? _InterlockedIncrement ((long *) (_v)) : \
+ sizeof *(_v) == sizeof(__int64) ? InterlockedIncrement64 ((__int64 *)(_v)) : \
(assert(!"should not get here"), 0))
#define p_atomic_dec(_v) \
((void) p_atomic_dec_return(_v))
#define p_atomic_dec_return(_v) (\
- sizeof *(_v) == sizeof(short) ? InterlockedDecrement16((short *) (_v)) : \
- sizeof *(_v) == sizeof(long) ? InterlockedDecrement ((long *) (_v)) : \
- sizeof *(_v) == sizeof(__int64) ? InterlockedDecrement64((__int64 *)(_v)) : \
+ sizeof *(_v) == sizeof(short) ? _InterlockedDecrement16((short *) (_v)) : \
+ sizeof *(_v) == sizeof(long) ? _InterlockedDecrement ((long *) (_v)) : \
+ sizeof *(_v) == sizeof(__int64) ? InterlockedDecrement64 ((__int64 *)(_v)) : \
+ (assert(!"should not get here"), 0))
+
+#define p_atomic_add(_v, _i) \
+ ((void) p_atomic_add_return((_v), (_i)))
+
+#define p_atomic_add_return(_v, _i) (\
+ sizeof *(_v) == sizeof(char) ? _InterlockedExchangeAdd8 ((char *) (_v), (_i)) : \
+ sizeof *(_v) == sizeof(short) ? _InterlockedExchangeAdd16((short *) (_v), (_i)) : \
+ sizeof *(_v) == sizeof(long) ? _InterlockedExchangeAdd ((long *) (_v), (_i)) : \
+ sizeof *(_v) == sizeof(__int64) ? InterlockedExchangeAdd64((__int64 *)(_v), (_i)) : \
(assert(!"should not get here"), 0))
#define p_atomic_cmpxchg(_v, _old, _new) (\
- sizeof *(_v) == sizeof(char) ? _InterlockedCompareExchange8((char *) (_v), (char) (_new), (char) (_old)) : \
- sizeof *(_v) == sizeof(short) ? InterlockedCompareExchange16((short *) (_v), (short) (_new), (short) (_old)) : \
- sizeof *(_v) == sizeof(long) ? InterlockedCompareExchange ((long *) (_v), (long) (_new), (long) (_old)) : \
- sizeof *(_v) == sizeof(__int64) ? InterlockedCompareExchange64((__int64 *)(_v), (__int64)(_new), (__int64)(_old)) : \
+ sizeof *(_v) == sizeof(char) ? _InterlockedCompareExchange8 ((char *) (_v), (char) (_new), (char) (_old)) : \
+ sizeof *(_v) == sizeof(short) ? _InterlockedCompareExchange16((short *) (_v), (short) (_new), (short) (_old)) : \
+ sizeof *(_v) == sizeof(long) ? _InterlockedCompareExchange ((long *) (_v), (long) (_new), (long) (_old)) : \
+ sizeof *(_v) == sizeof(__int64) ? InterlockedCompareExchange64 ((__int64 *)(_v), (__int64)(_new), (__int64)(_old)) : \
(assert(!"should not get here"), 0))
#endif
sizeof(*v) == sizeof(uint64_t) ? atomic_inc_64((uint64_t *)(v)) : \
(assert(!"should not get here"), 0))
-#define p_atomic_inc_return(v) ((typeof(*v)) \
+#define p_atomic_inc_return(v) (__typeof(*v))( \
sizeof(*v) == sizeof(uint8_t) ? atomic_inc_8_nv ((uint8_t *)(v)) : \
sizeof(*v) == sizeof(uint16_t) ? atomic_inc_16_nv((uint16_t *)(v)) : \
sizeof(*v) == sizeof(uint32_t) ? atomic_inc_32_nv((uint32_t *)(v)) : \
sizeof(*v) == sizeof(uint64_t) ? atomic_inc_64_nv((uint64_t *)(v)) : \
(assert(!"should not get here"), 0))
-#define p_atomic_dec(v) ((void) \
+#define p_atomic_dec(v) (void) ( \
sizeof(*v) == sizeof(uint8_t) ? atomic_dec_8 ((uint8_t *)(v)) : \
sizeof(*v) == sizeof(uint16_t) ? atomic_dec_16((uint16_t *)(v)) : \
sizeof(*v) == sizeof(uint32_t) ? atomic_dec_32((uint32_t *)(v)) : \
sizeof(*v) == sizeof(uint64_t) ? atomic_dec_64((uint64_t *)(v)) : \
(assert(!"should not get here"), 0))
-#define p_atomic_dec_return(v) ((typeof(*v)) \
+#define p_atomic_dec_return(v) (__typeof(*v))( \
sizeof(*v) == sizeof(uint8_t) ? atomic_dec_8_nv ((uint8_t *)(v)) : \
sizeof(*v) == sizeof(uint16_t) ? atomic_dec_16_nv((uint16_t *)(v)) : \
sizeof(*v) == sizeof(uint32_t) ? atomic_dec_32_nv((uint32_t *)(v)) : \
sizeof(*v) == sizeof(uint64_t) ? atomic_dec_64_nv((uint64_t *)(v)) : \
(assert(!"should not get here"), 0))
-#define p_atomic_cmpxchg(v, old, _new) ((typeof(*v)) \
+#define p_atomic_add(v, i) (void) ( \
+ sizeof(*v) == sizeof(uint8_t) ? atomic_add_8 ((uint8_t *)(v), (i)) : \
+ sizeof(*v) == sizeof(uint16_t) ? atomic_add_16((uint16_t *)(v), (i)) : \
+ sizeof(*v) == sizeof(uint32_t) ? atomic_add_32((uint32_t *)(v), (i)) : \
+ sizeof(*v) == sizeof(uint64_t) ? atomic_add_64((uint64_t *)(v), (i)) : \
+ (assert(!"should not get here"), 0))
+
+#define p_atomic_add_return(v, i) (__typeof(*v)) ( \
+ sizeof(*v) == sizeof(uint8_t) ? atomic_add_8_nv ((uint8_t *)(v), (i)) : \
+ sizeof(*v) == sizeof(uint16_t) ? atomic_add_16_nv((uint16_t *)(v), (i)) : \
+ sizeof(*v) == sizeof(uint32_t) ? atomic_add_32_nv((uint32_t *)(v), (i)) : \
+ sizeof(*v) == sizeof(uint64_t) ? atomic_add_64_nv((uint64_t *)(v), (i)) : \
+ (assert(!"should not get here"), 0))
+
+#define p_atomic_cmpxchg(v, old, _new) (__typeof(*v))( \
sizeof(*v) == sizeof(uint8_t) ? atomic_cas_8 ((uint8_t *)(v), (uint8_t )(old), (uint8_t )(_new)) : \
sizeof(*v) == sizeof(uint16_t) ? atomic_cas_16((uint16_t *)(v), (uint16_t)(old), (uint16_t)(_new)) : \
sizeof(*v) == sizeof(uint32_t) ? atomic_cas_32((uint32_t *)(v), (uint32_t)(old), (uint32_t)(_new)) : \
#error "No pipe_atomic implementation selected"
#endif
-
+#ifndef PIPE_NATIVE_ATOMIC_XCHG
+static inline uint32_t p_atomic_xchg_32(uint32_t *v, uint32_t i)
+{
+ uint32_t actual = p_atomic_read(v);
+ uint32_t expected;
+ do {
+ expected = actual;
+ actual = p_atomic_cmpxchg(v, expected, i);
+ } while (expected != actual);
+ return actual;
+}
+
+static inline uint64_t p_atomic_xchg_64(uint64_t *v, uint64_t i)
+{
+ uint64_t actual = p_atomic_read(v);
+ uint64_t expected;
+ do {
+ expected = actual;
+ actual = p_atomic_cmpxchg(v, expected, i);
+ } while (expected != actual);
+ return actual;
+}
+
+#define p_atomic_xchg(v, i) (__typeof(*(v)))( \
+ sizeof(*(v)) == sizeof(uint32_t) ? p_atomic_xchg_32((uint32_t *)(v), (uint32_t)(i)) : \
+ sizeof(*(v)) == sizeof(uint64_t) ? p_atomic_xchg_64((uint64_t *)(v), (uint64_t)(i)) : \
+ (assert(!"should not get here"), 0))
+#endif
#endif /* U_ATOMIC_H */
projects / mesa.git / blobdiff