diff options
Diffstat (limited to 'src/gallium/include/pipe/p_atomic.h')
| -rw-r--r-- | src/gallium/include/pipe/p_atomic.h | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/src/gallium/include/pipe/p_atomic.h b/src/gallium/include/pipe/p_atomic.h deleted file mode 100644 index c0a0ac0edb..0000000000 --- a/src/gallium/include/pipe/p_atomic.h +++ /dev/null @@ -1,247 +0,0 @@ -/** - * Many similar implementations exist. See for example libwsbm - * or the linux kernel include/atomic.h - * - * No copyright claimed on this file. - * - */ - -#ifndef P_ATOMIC_H -#define P_ATOMIC_H - -#include "p_compiler.h" -#include "p_defines.h" - -#ifdef __cplusplus -extern "C" { -#endif - - -/* Favor OS-provided implementations. - * - * Where no OS-provided implementation is available, fall back to - * locally coded assembly, compiler intrinsic or ultimately a - * mutex-based implementation. - */ -#if (defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY) || \ - defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)) -#define PIPE_ATOMIC_OS_UNLOCKED -#elif defined(PIPE_CC_MSVC) -#define PIPE_ATOMIC_MSVC_INTRINSIC -#elif (defined(PIPE_CC_MSVC) && defined(PIPE_ARCH_X86)) -#define PIPE_ATOMIC_ASM_MSVC_X86 -#elif (defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86)) -#define PIPE_ATOMIC_ASM_GCC_X86 -#elif defined(PIPE_CC_GCC) -#define PIPE_ATOMIC_GCC_INTRINSIC -#else -#error "Unsupported platform" -#endif - - - -#if defined(PIPE_ATOMIC_ASM_GCC_X86) - -#define PIPE_ATOMIC "GCC x86 assembly" - -#define p_atomic_set(_v, _i) (*(_v) = (_i)) -#define p_atomic_read(_v) (*(_v)) - - -static INLINE boolean -p_atomic_dec_zero(int32_t *v) -{ - unsigned char c; - - __asm__ __volatile__("lock; decl %0; sete %1":"+m"(*v), "=qm"(c) - ::"memory"); - - return c != 0; -} - -static INLINE void -p_atomic_inc(int32_t *v) -{ - __asm__ __volatile__("lock; incl %0":"+m"(*v)); -} - -static INLINE void -p_atomic_dec(int32_t *v) -{ - __asm__ __volatile__("lock; decl %0":"+m"(*v)); -} - -static INLINE int32_t -p_atomic_cmpxchg(int32_t *v, int32_t old, int32_t _new) -{ - return __sync_val_compare_and_swap(v, old, _new); -} -#endif - - - -/* Implementation using GCC-provided synchronization intrinsics - */ -#if defined(PIPE_ATOMIC_GCC_INTRINSIC) - -#define PIPE_ATOMIC "GCC Sync Intrinsics" - -#define p_atomic_set(_v, _i) (*(_v) = (_i)) -#define p_atomic_read(_v) (*(_v)) - - -static INLINE boolean -p_atomic_dec_zero(int32_t *v) -{ - return (__sync_sub_and_fetch(v, 1) == 0); -} - -static INLINE void -p_atomic_inc(int32_t *v) -{ - (void) __sync_add_and_fetch(v, 1); -} - -static INLINE void -p_atomic_dec(int32_t *v) -{ - (void) __sync_sub_and_fetch(v, 1); -} - -static INLINE int32_t -p_atomic_cmpxchg(int32_t *v, int32_t old, int32_t _new) -{ - return __sync_val_compare_and_swap(v, old, _new); -} -#endif - - - -/* Unlocked version for single threaded environments, such as some - * windows kernel modules. - */ -#if defined(PIPE_ATOMIC_OS_UNLOCKED) - -#define PIPE_ATOMIC "Unlocked" - -#define p_atomic_set(_v, _i) (*(_v) = (_i)) -#define p_atomic_read(_v) (*(_v)) -#define p_atomic_dec_zero(_v) ((boolean) --(*(_v))) -#define p_atomic_inc(_v) ((void) (*(_v))++) -#define p_atomic_dec(_v) ((void) (*(_v))--) -#define p_atomic_cmpxchg(_v, old, _new) (*(_v) == old ? *(_v) = (_new) : *(_v)) - -#endif - - -/* Locally coded assembly for MSVC on x86: - */ -#if defined(PIPE_ATOMIC_ASM_MSVC_X86) - -#define PIPE_ATOMIC "MSVC x86 assembly" - -#define p_atomic_set(_v, _i) (*(_v) = (_i)) -#define p_atomic_read(_v) (*(_v)) - -static INLINE boolean -p_atomic_dec_zero(int32_t *v) -{ - unsigned char c; - - __asm { - mov eax, [v] - lock dec dword ptr [eax] - sete byte ptr [c] - } - - return c != 0; -} - -static INLINE void -p_atomic_inc(int32_t *v) -{ - __asm { - mov eax, [v] - lock inc dword ptr [eax] - } -} - -static INLINE void -p_atomic_dec(int32_t *v) -{ - __asm { - mov eax, [v] - lock dec dword ptr [eax] - } -} - -static INLINE int32_t -p_atomic_cmpxchg(int32_t *v, int32_t old, int32_t _new) -{ - int32_t orig; - - __asm { - mov ecx, [v] - mov eax, [old] - mov edx, [_new] - lock cmpxchg [ecx], edx - mov [orig], eax - } - - return orig; -} -#endif - - -#if defined(PIPE_ATOMIC_MSVC_INTRINSIC) - -#define PIPE_ATOMIC "MSVC Intrinsics" - -#include <intrin.h> - -#pragma intrinsic(_InterlockedIncrement) -#pragma intrinsic(_InterlockedDecrement) -#pragma intrinsic(_InterlockedCompareExchange) - -#define p_atomic_set(_v, _i) (*(_v) = (_i)) -#define p_atomic_read(_v) (*(_v)) - -static INLINE boolean -p_atomic_dec_zero(int32_t *v) -{ - return _InterlockedDecrement(v) == 0; -} - -static INLINE void -p_atomic_inc(int32_t *v) -{ - _InterlockedIncrement(v); -} - -static INLINE void -p_atomic_dec(int32_t *v) -{ - _InterlockedDecrement(v); -} - -static INLINE int32_t -p_atomic_cmpxchg(int32_t *v, int32_t old, int32_t _new) -{ - return _InterlockedCompareExchange(v, _new, old); -} - -#endif - - - -#ifndef PIPE_ATOMIC -#error "No pipe_atomic implementation selected" -#endif - - - -#ifdef __cplusplus -} -#endif - -#endif /* P_ATOMIC_H */ |