diff options
Diffstat (limited to 'src/atomic_ptr.hpp')
| -rw-r--r-- | src/atomic_ptr.hpp | 95 |
1 files changed, 39 insertions, 56 deletions
diff --git a/src/atomic_ptr.hpp b/src/atomic_ptr.hpp index 2e585b7..08418d3 100644 --- a/src/atomic_ptr.hpp +++ b/src/atomic_ptr.hpp @@ -26,26 +26,16 @@ #include "platform.hpp" -#if defined XS_FORCE_MUTEXES -#define XS_ATOMIC_PTR_MUTEX -#elif (defined __i386__ || defined __x86_64__) && defined __GNUC__ -#define XS_ATOMIC_PTR_X86 -#elif defined __ARM_ARCH_7A__ && defined __GNUC__ -#define XS_ATOMIC_PTR_ARM -#elif defined XS_HAVE_WINDOWS -#define XS_ATOMIC_PTR_WINDOWS -#elif (defined XS_HAVE_SOLARIS || defined XS_HAVE_NETBSD) -#define XS_ATOMIC_PTR_ATOMIC_H +#if defined(XS_ATOMIC_GCC_SYNC) +#elif (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))) +#elif (defined(__GNUC__) && defined(__ARM_ARCH_7A__)) +#elif defined(XS_ATOMIC_SOLARIS) +# include <atomic.h> +#elif defined(XS_HAVE_WINDOWS) +# include "windows.hpp" #else -#define XS_ATOMIC_PTR_MUTEX -#endif - -#if defined XS_ATOMIC_PTR_MUTEX -#include "mutex.hpp" -#elif defined XS_ATOMIC_PTR_WINDOWS -#include "windows.hpp" -#elif defined XS_ATOMIC_PTR_ATOMIC_H -#include <atomic.h> +# define XS_ATOMIC_OVER_MUTEX 1 +# include "mutex.hpp" #endif namespace xs @@ -80,9 +70,7 @@ namespace xs // to the 'val' value. Old value is returned. inline T *xchg (T *val_) { -#if defined XS_ATOMIC_PTR_WINDOWS - return (T*) InterlockedExchangePointer ((PVOID*) &ptr, val_); -#elif defined __GNUC__ && !defined XS_DISABLE_GCC_SYNC_BUILTINS +#if defined(XS_ATOMIC_GCC_SYNC) { T* ov; do @@ -91,16 +79,16 @@ namespace xs } while (!__sync_bool_compare_and_swap (&ptr, ov, val_)); return ov; } -#elif defined XS_ATOMIC_PTR_ATOMIC_H - return (T*) atomic_swap_ptr (&ptr, val_); -#elif defined XS_ATOMIC_PTR_X86 + +#elif (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))) T *old; __asm__ volatile ( "lock; xchg %0, %2" : "=r" (old), "=m" (ptr) : "m" (ptr), "0" (val_)); return old; -#elif defined XS_ATOMIC_PTR_ARM + +#elif (defined(__GNUC__) && defined(__ARM_ARCH_7A__)) T* old; unsigned int flag; __asm__ volatile ( @@ -114,14 +102,19 @@ namespace xs : "r"(&ptr), "r"(val_) : "cc"); return old; -#elif defined XS_ATOMIC_PTR_MUTEX + +#elif defined(XS_ATOMIC_SOLARIS) + return (T*) atomic_swap_ptr (&ptr, val_); + +#elif defined(XS_HAVE_WINDOWS) + return (T*) InterlockedExchangePointer ((PVOID*) &ptr, val_); + +#else sync.lock (); T *old = (T*) ptr; ptr = val_; sync.unlock (); return old; -#else -#error atomic_ptr is not implemented for this platform #endif } @@ -131,14 +124,10 @@ namespace xs // is returned. inline T *cas (T *cmp_, T *val_) { -#if defined XS_ATOMIC_PTR_WINDOWS - return (T*) InterlockedCompareExchangePointer ( - (volatile PVOID*) &ptr, val_, cmp_); -#elif defined __GNUC__ && !defined XS_DISABLE_GCC_SYNC_BUILTINS +#if defined(XS_ATOMIC_GCC_SYNC) return (T*) __sync_val_compare_and_swap (&ptr, cmp_, val_); -#elif defined XS_ATOMIC_PTR_ATOMIC_H - return (T*) atomic_cas_ptr (&ptr, cmp_, val_); -#elif defined XS_ATOMIC_PTR_X86 + +#elif (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))) T *old; __asm__ volatile ( "lock; cmpxchg %2, %3" @@ -146,7 +135,8 @@ namespace xs : "r" (val_), "m" (ptr), "0" (cmp_) : "cc"); return old; -#elif defined XS_ATOMIC_PTR_ARM + +#elif (defined(__GNUC__) && defined(__ARM_ARCH_7A__)) T *old; unsigned int flag; __asm__ volatile ( @@ -162,22 +152,28 @@ namespace xs : "r"(&ptr), "r"(cmp_), "r"(val_) : "cc"); return old; -#elif defined XS_ATOMIC_PTR_MUTEX + +#elif defined(XS_ATOMIC_SOLARIS) + return (T*) atomic_cas_ptr (&ptr, cmp_, val_); + +#elif defined(XS_HAVE_WINDOWS) + return (T*) InterlockedCompareExchangePointer ( + (volatile PVOID*) &ptr, val_, cmp_); + +#else sync.lock (); T *old = (T*) ptr; if (ptr == cmp_) ptr = val_; sync.unlock (); return old; -#else -#error atomic_ptr is not implemented for this platform #endif } private: volatile T *ptr; -#if defined XS_ATOMIC_PTR_MUTEX +#if defined XS_ATOMIC_OVER_MUTEX mutex_t sync; #endif @@ -188,21 +184,8 @@ namespace xs } // Remove macros local to this file. -#if defined XS_ATOMIC_PTR_WINDOWS -#undef XS_ATOMIC_PTR_WINDOWS -#endif -#if defined XS_ATOMIC_PTR_ATOMIC_H -#undef XS_ATOMIC_PTR_ATOMIC_H -#endif -#if defined XS_ATOMIC_PTR_X86 -#undef XS_ATOMIC_PTR_X86 -#endif -#if defined XS_ATOMIC_PTR_ARM -#undef XS_ATOMIC_PTR_ARM -#endif -#if defined XS_ATOMIC_PTR_MUTEX -#undef XS_ATOMIC_PTR_MUTEX +#if defined(XS_ATOMIC_OVER_MUTEX) +# undef XS_ATOMIC_OVER_MUTEX #endif #endif - |