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| author | Andi Kleen <ak@linux.intel.com> | 2012-12-22 00:58:34 -0800 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2013-07-02 08:46:54 -0700 |
| commit | b023e4ca99f5e81f90d87d23cd267ef2abd2388c (patch) | |
| tree | 6fd6b77bef5574ee6fa5aa44967766b018d3b489 | |
| parent | 1cdbe579482c07e9f4bb3baa4864da2d3e7eb837 (diff) | |
| download | glibc-b023e4ca99f5e81f90d87d23cd267ef2abd2388c.tar glibc-b023e4ca99f5e81f90d87d23cd267ef2abd2388c.tar.gz glibc-b023e4ca99f5e81f90d87d23cd267ef2abd2388c.tar.bz2 glibc-b023e4ca99f5e81f90d87d23cd267ef2abd2388c.zip | |
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
| -rw-r--r-- | nptl/ChangeLog | 9 | ||||
| -rw-r--r-- | nptl/pthreadP.h | 15 | ||||
| -rw-r--r-- | nptl/sysdeps/pthread/pthread.h | 28 |
3 files changed, 43 insertions, 9 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index d5eb9ea8dc..97ff78507b 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,4 +1,13 @@ 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> * sysdeps/unix/sysv/linux/i386/lowlevellock.h (__lll_timedwait_tid, diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h index 7883fdfa10..e6b80bfd6e 100644 --- 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 ded5ae59ff..61d534687f 100644 --- 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 |