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-rw-r--r--3rdparty/portaudio/src/common/pa_memorybarrier.h80
1 files changed, 45 insertions, 35 deletions
diff --git a/3rdparty/portaudio/src/common/pa_memorybarrier.h b/3rdparty/portaudio/src/common/pa_memorybarrier.h
index 2879ce33adc..6f07b603e97 100644
--- a/3rdparty/portaudio/src/common/pa_memorybarrier.h
+++ b/3rdparty/portaudio/src/common/pa_memorybarrier.h
@@ -30,13 +30,13 @@
*/
/*
- * The text above constitutes the entire PortAudio license; however,
+ * 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
+ * they can be incorporated into the canonical version. It is also
+ * requested that these non-binding requests be included along with the
* license above.
*/
@@ -61,42 +61,52 @@
****************/
#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()
+/* Support for the atomic library was added in C11.
+ */
+# if (__STDC_VERSION__ < 201112L) || defined(__STDC_NO_ATOMICS__)
+# 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.
+ These were deprecated in MacOS 10.12. */
+# define PaUtil_FullMemoryBarrier() OSMemoryBarrier()
+# define PaUtil_ReadMemoryBarrier() OSMemoryBarrier()
+# define PaUtil_WriteMemoryBarrier() OSMemoryBarrier()
+# else
+# include <stdatomic.h>
+# define PaUtil_FullMemoryBarrier() atomic_thread_fence(memory_order_seq_cst)
+# define PaUtil_ReadMemoryBarrier() atomic_thread_fence(memory_order_acquire)
+# define PaUtil_WriteMemoryBarrier() atomic_thread_fence(memory_order_release)
+# endif
#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()
+# 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")
+# 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")
+ 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
+# 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>
@@ -117,12 +127,12 @@
# 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()
+# 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.
+# 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