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authorroot <root>2011-08-21 01:03:09 +0000
committerroot <root>2011-08-21 01:03:09 +0000
commit38bea41166a5b3d80d66796133bf45c29d0666c7 (patch)
tree27da7edf23fd5ed0b32e4fc74cab40c3307f7a0d
parentf37fb32493b0a4a5b6579d7263494c1589ff204f (diff)
*** empty log message ***
-rw-r--r--ecb.h60
-rw-r--r--eio.c2
2 files changed, 41 insertions, 21 deletions
diff --git a/ecb.h b/ecb.h
index 8383374..b733c42 100644
--- a/ecb.h
+++ b/ecb.h
@@ -50,7 +50,7 @@
/* many compilers define _GNUC_ to some versions but then only implement
* what their idiot authors think are the "more important" extensions,
- * causing enourmous grief in return for some better fake benchmark numbers.
+ * causing enormous grief in return for some better fake benchmark numbers.
* or so.
* we try to detect these and simply assume they are not gcc - if they have
* an issue with that they should have done it right in the first place.
@@ -65,6 +65,13 @@
/*****************************************************************************/
+/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
+/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
+
+#if ECB_NO_THREADS || ECB_NO_SMP
+ #define ECB_MEMORY_FENCE do { } while (0)
+#endif
+
#ifndef ECB_MEMORY_FENCE
#if ECB_GCC_VERSION(2,5)
#if __x86
@@ -75,15 +82,23 @@
#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
+ #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
+ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
+ #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
+ || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
+ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
+ #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
+ || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
+ #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
#endif
#endif
#endif
#ifndef ECB_MEMORY_FENCE
- #if ECB_GCC_VERSION(4,4)
+ #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER)
#define ECB_MEMORY_FENCE __sync_synchronize ()
- #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
- #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
+ /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
+ /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
#elif _MSC_VER >= 1400 /* VC++ 2005 */
#pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
#define ECB_MEMORY_FENCE _ReadWriteBarrier ()
@@ -92,24 +107,32 @@
#elif defined(_WIN32)
#include <WinNT.h>
#define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
- #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
- #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
#endif
#endif
#ifndef ECB_MEMORY_FENCE
- /*
- * if you get undefined symbol references to pthread_mutex_lock,
- * or failure to find pthread.h, then you should implement
- * the ECB_MEMORY_FENCE operations for your cpu/compiler
- * OR proide pthread.h and link against the posix thread library
- * of your system.
- */
- #include <pthread.h>
-
- static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
- #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
+ #if !ECB_AVOID_PTHREADS
+ /*
+ * if you get undefined symbol references to pthread_mutex_lock,
+ * or failure to find pthread.h, then you should implement
+ * the ECB_MEMORY_FENCE operations for your cpu/compiler
+ * OR provide pthread.h and link against the posix thread library
+ * of your system.
+ */
+ #include <pthread.h>
+ #define ECB_NEEDS_PTHREADS 1
+ #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
+
+ static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
+ #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
+ #endif
+#endif
+
+#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
+#endif
+
+#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
#endif
@@ -243,9 +266,6 @@ typedef int ecb_bool;
return x >> 24;
}
- /* you have the choice beetween something with a table lookup, */
- /* something using lots of bit arithmetic and a simple loop */
- /* we went for the loop */
ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
ecb_function_ int ecb_ld32 (uint32_t x)
{
diff --git a/eio.c b/eio.c
index 18a903b..d59db3e 100644
--- a/eio.c
+++ b/eio.c
@@ -45,7 +45,7 @@
#include "ecb.h"
#ifdef EIO_STACKSIZE
-# define XTHREAD_STACKSIZE EIO_STACKSIZE
+# define X_STACKSIZE EIO_STACKSIZE
#endif
#include "xthread.h"