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Diffstat (limited to 'portaudio/src/common/pa_memorybarrier.h')
| -rw-r--r-- | portaudio/src/common/pa_memorybarrier.h | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/portaudio/src/common/pa_memorybarrier.h b/portaudio/src/common/pa_memorybarrier.h deleted file mode 100644 index 0dca6aa..0000000 --- a/portaudio/src/common/pa_memorybarrier.h +++ /dev/null @@ -1,128 +0,0 @@ -/* - * $Id: pa_memorybarrier.h 1240 2007-07-17 13:05:07Z bjornroche $ - * Portable Audio I/O Library - * Memory barrier utilities - * - * Author: Bjorn Roche, XO Audio, LLC - * - * This program uses the PortAudio Portable Audio Library. - * For more information see: http://www.portaudio.com - * Copyright (c) 1999-2000 Ross Bencina and Phil Burk - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files - * (the "Software"), to deal in the Software without restriction, - * including without limitation the rights to use, copy, modify, merge, - * publish, distribute, sublicense, and/or sell copies of the Software, - * and to permit persons to whom the Software is furnished to do so, - * subject to the following conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. - * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR - * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF - * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION - * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -/* - * The text above constitutes the entire PortAudio license; however, - * the PortAudio community also makes the following non-binding requests: - * - * Any person wishing to distribute modifications to the Software is - * requested to send the modifications to the original developer so that - * they can be incorporated into the canonical version. It is also - * requested that these non-binding requests be included along with the - * license above. - */ - -/** - @file pa_memorybarrier.h - @ingroup common_src -*/ - -/**************** - * Some memory barrier primitives based on the system. - * right now only OS X, FreeBSD, and Linux are supported. In addition to providing - * memory barriers, these functions should ensure that data cached in registers - * is written out to cache where it can be snooped by other CPUs. (ie, the volatile - * keyword should not be required) - * - * the primitives that must be defined are: - * - * PaUtil_FullMemoryBarrier() - * PaUtil_ReadMemoryBarrier() - * PaUtil_WriteMemoryBarrier() - * - ****************/ - -#if defined(__APPLE__) -# include <libkern/OSAtomic.h> - /* Here are the memory barrier functions. Mac OS X only provides - full memory barriers, so the three types of barriers are the same, - however, these barriers are superior to compiler-based ones. */ -# define PaUtil_FullMemoryBarrier() OSMemoryBarrier() -# define PaUtil_ReadMemoryBarrier() OSMemoryBarrier() -# define PaUtil_WriteMemoryBarrier() OSMemoryBarrier() -#elif defined(__GNUC__) - /* GCC >= 4.1 has built-in intrinsics. We'll use those */ -# if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) -# define PaUtil_FullMemoryBarrier() __sync_synchronize() -# define PaUtil_ReadMemoryBarrier() __sync_synchronize() -# define PaUtil_WriteMemoryBarrier() __sync_synchronize() - /* as a fallback, GCC understands volatile asm and "memory" to mean it - * should not reorder memory read/writes */ - /* Note that it is not clear that any compiler actually defines __PPC__, - * it can probably removed safely. */ -# elif defined( __ppc__ ) || defined( __powerpc__) || defined( __PPC__ ) -# define PaUtil_FullMemoryBarrier() asm volatile("sync":::"memory") -# define PaUtil_ReadMemoryBarrier() asm volatile("sync":::"memory") -# define PaUtil_WriteMemoryBarrier() asm volatile("sync":::"memory") -# elif defined( __i386__ ) || defined( __i486__ ) || defined( __i586__ ) || \ - defined( __i686__ ) || defined( __x86_64__ ) -# define PaUtil_FullMemoryBarrier() asm volatile("mfence":::"memory") -# define PaUtil_ReadMemoryBarrier() asm volatile("lfence":::"memory") -# define PaUtil_WriteMemoryBarrier() asm volatile("sfence":::"memory") -# else -# ifdef ALLOW_SMP_DANGERS -# warning Memory barriers not defined on this system or system unknown -# warning For SMP safety, you should fix this. -# define PaUtil_FullMemoryBarrier() -# define PaUtil_ReadMemoryBarrier() -# define PaUtil_WriteMemoryBarrier() -# else -# error Memory barriers are not defined on this system. You can still compile by defining ALLOW_SMP_DANGERS, but SMP safety will not be guaranteed. -# endif -# endif -#elif (_MSC_VER >= 1400) && !defined(_WIN32_WCE) -# include <intrin.h> -# pragma intrinsic(_ReadWriteBarrier) -# pragma intrinsic(_ReadBarrier) -# pragma intrinsic(_WriteBarrier) -/* note that MSVC intrinsics _ReadWriteBarrier(), _ReadBarrier(), _WriteBarrier() are just compiler barriers *not* memory barriers */ -# define PaUtil_FullMemoryBarrier() _ReadWriteBarrier() -# define PaUtil_ReadMemoryBarrier() _ReadBarrier() -# define PaUtil_WriteMemoryBarrier() _WriteBarrier() -#elif defined(_WIN32_WCE) -# define PaUtil_FullMemoryBarrier() -# define PaUtil_ReadMemoryBarrier() -# define PaUtil_WriteMemoryBarrier() -#elif defined(_MSC_VER) || defined(__BORLANDC__) -# define PaUtil_FullMemoryBarrier() _asm { lock add [esp], 0 } -# define PaUtil_ReadMemoryBarrier() _asm { lock add [esp], 0 } -# define PaUtil_WriteMemoryBarrier() _asm { lock add [esp], 0 } -#else -# ifdef ALLOW_SMP_DANGERS -# warning Memory barriers not defined on this system or system unknown -# warning For SMP safety, you should fix this. -# define PaUtil_FullMemoryBarrier() -# define PaUtil_ReadMemoryBarrier() -# define PaUtil_WriteMemoryBarrier() -# else -# error Memory barriers are not defined on this system. You can still compile by defining ALLOW_SMP_DANGERS, but SMP safety will not be guaranteed. -# endif -#endif |