Add new internal mutex type flags for elision.

Add Enable/disable flags used internally

Extend the mutex initializers to have the fields needed for
elision. The layout stays the same, and this is not visible
to programs.

These changes are not exposed outside pthread

diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index d5eb9ea8dcaf6c70410bbb5f48a679e1aac02358..97ff78507bd7c93194f4fdc9a3d0a854bd36f948 100644 (file)
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,3 +1,12 @@
+2013-07-02  Andi Kleen  <ak@linux.intel.com>
+
+       * pthreadP.h: Add elision types.
+         (PTHREAD_MUTEX_TYPE_ELISION): Add.
+       * sysdeps/pthread/pthread.h: Add elision initializers.
+         (PTHREAD_MUTEX_ELISION_NP, PTHREAD_MUTEX_NO_ELISION_NP,
+          PTHREAD_MUTEX_PSHARED_NP): Add new flags.
+         (__PTHREAD_SPINS): Add.
+
 2013-07-02  Andi Kleen  <ak@linux.intel.com>
            Hongjiu Lu  <hongjiu.lu@intel.com>
 

diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 7883fdfa104618860377e457e9fc31be7834eed8..e6b80bfd6ec3d26cc79cdaeaecbd7caa2e3c08d4 100644 (file)
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -61,6 +61,10 @@
 enum
 {
   PTHREAD_MUTEX_KIND_MASK_NP = 3,
+
+  PTHREAD_MUTEX_ELISION_NP    = 256,
+  PTHREAD_MUTEX_NO_ELISION_NP = 512,
+
   PTHREAD_MUTEX_ROBUST_NORMAL_NP = 16,
   PTHREAD_MUTEX_ROBUST_RECURSIVE_NP
   = PTHREAD_MUTEX_ROBUST_NORMAL_NP | PTHREAD_MUTEX_RECURSIVE_NP,
@@ -93,12 +97,21 @@ enum
   PTHREAD_MUTEX_PP_ERRORCHECK_NP
   = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
   PTHREAD_MUTEX_PP_ADAPTIVE_NP
-  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP,
+  PTHREAD_MUTEX_ELISION_FLAGS_NP
+  = PTHREAD_MUTEX_ELISION_NP | PTHREAD_MUTEX_NO_ELISION_NP,
+
+  PTHREAD_MUTEX_TIMED_ELISION_NP =
+         PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_ELISION_NP,
+  PTHREAD_MUTEX_TIMED_NO_ELISION_NP =
+         PTHREAD_MUTEX_TIMED_NP | PTHREAD_MUTEX_NO_ELISION_NP,
 };
 #define PTHREAD_MUTEX_PSHARED_BIT 128
 
 #define PTHREAD_MUTEX_TYPE(m) \
   ((m)->__data.__kind & 127)
+#define PTHREAD_MUTEX_TYPE_ELISION(m) \
+  ((m)->__data.__kind & (127|PTHREAD_MUTEX_ELISION_FLAGS_NP))
 
 #if LLL_PRIVATE == 0 && LLL_SHARED == 128
 # define PTHREAD_MUTEX_PSHARED(m) \

diff --git a/nptl/sysdeps/pthread/pthread.h b/nptl/sysdeps/pthread/pthread.h
index ded5ae59ffc24f4d1d801529b27c4af13ce90578..61d534687f0175a1817b50c5141fbb050e091664 100644 (file)
--- a/nptl/sysdeps/pthread/pthread.h
+++ b/nptl/sysdeps/pthread/pthread.h
@@ -83,27 +83,39 @@ enum
 
 
 /* Mutex initializers.  */
+#if __PTHREAD_MUTEX_HAVE_ELISION == 1 /* 64bit layout.  */
+#define __PTHREAD_SPINS 0, 0
+#elif __PTHREAD_MUTEX_HAVE_ELISION == 2 /* 32bit layout.  */
+#define __PTHREAD_SPINS { 0, 0 }
+#else
+#define __PTHREAD_SPINS 0
+#endif
+
 #ifdef __PTHREAD_MUTEX_HAVE_PREV
 # define PTHREAD_MUTEX_INITIALIZER \
-  { { 0, 0, 0, 0, 0, 0, { 0, 0 } } }
+  { { 0, 0, 0, 0, 0, __PTHREAD_SPINS, { 0, 0 } } }
 # ifdef __USE_GNU
 #  define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0, 0 } } }
+  { { 0, 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, __PTHREAD_SPINS, { 0, 0 } } }
 #  define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0, 0 } } }
+  { { 0, 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, __PTHREAD_SPINS, { 0, 0 } } }
 #  define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0, 0 } } }
+  { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, __PTHREAD_SPINS, { 0, 0 } } }
+#  define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \
+  { { 0, 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, __PTHREAD_SPINS, { 0, 0 } } }
+
 # endif
 #else
 # define PTHREAD_MUTEX_INITIALIZER \
-  { { 0, 0, 0, 0, 0, { 0 } } }
+  { { 0, 0, 0, 0, 0, { __PTHREAD_SPINS } } }
 # ifdef __USE_GNU
 #  define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { 0 } } }
+  { { 0, 0, 0, PTHREAD_MUTEX_RECURSIVE_NP, 0, { __PTHREAD_SPINS } } }
 #  define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { 0 } } }
+  { { 0, 0, 0, PTHREAD_MUTEX_ERRORCHECK_NP, 0, { __PTHREAD_SPINS } } }
 #  define PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP \
-  { { 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { 0 } } }
+  { { 0, 0, 0, PTHREAD_MUTEX_ADAPTIVE_NP, 0, { __PTHREAD_SPINS } } }
+
 # endif
 #endif