diff options
-rw-r--r-- | nptl/ChangeLog | 18 | ||||
-rw-r--r-- | nptl/pthreadP.h | 4 | ||||
-rw-r--r-- | nptl/pthread_mutex_lock.c | 53 | ||||
-rw-r--r-- | nptl/pthread_mutex_timedlock.c | 24 | ||||
-rw-r--r-- | nptl/pthread_mutex_trylock.c | 32 | ||||
-rw-r--r-- | nptl/pthread_mutex_unlock.c | 21 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c | 7 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86/bits/pthreadtypes.h | 13 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86/elision-trylock.c | 5 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86/force-elision.h | 31 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_cond_lock.c | 21 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_lock.c | 21 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_timedlock.c | 20 | ||||
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_trylock.c | 21 |
14 files changed, 267 insertions, 24 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index e7495b9eb5..7f82b2098a 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,4 +1,22 @@ 2013-07-02 Andi Kleen <ak@linux.intel.com> + Hongjiu Lu <hongjiu.lu@intel.com> + + * pthread_mutex_lock.c + (__pthread_mutex_lock): Add lock elision support. + * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Likewise. + * pthread_mutex_trylock.c (__pthread_mutex_trylock): Likewise. + * pthread_mutex_unlock.c (__pthread_mutex_unlock_usercnt): Likewise. + * sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c: Likewise. + * sysdeps/unix/sysv/linux/x86/bits/pthreadtypes.h: Likewise. + * sysdeps/unix/sysv/linux/x86/Makefile: New file. + * sysdeps/unix/sysv/linux/x86/force-elision.h: New file + * sysdeps/unix/sysv/linux/x86/pthread_mutex_cond_lock.c: Likewise. + * sysdeps/unix/sysv/linux/x86/pthread_mutex_lock.c: Likewise. + * sysdeps/unix/sysv/linux/x86/pthread_mutex_timedlock.c: Likewise. + * sysdeps/unix/sysv/linux/x86/pthread_mutex_trylock.c: Likewise. + * sysdeps/unix/sysv/linux/x86/pthread_mutex_unlock.c: Likewise. + +2013-07-02 Andi Kleen <ak@linux.intel.com> * tst-mutex5.c: Include config.h. (do_test): Add checks for ENABLE_LOCK_ELISION. diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h index e6b80bfd6e..789bbf6ae8 100644 --- a/nptl/pthreadP.h +++ b/nptl/pthreadP.h @@ -110,8 +110,10 @@ enum #define PTHREAD_MUTEX_TYPE(m) \ ((m)->__data.__kind & 127) +/* Don't include NO_ELISION, as that type is always the same + as the underlying lock type. */ #define PTHREAD_MUTEX_TYPE_ELISION(m) \ - ((m)->__data.__kind & (127|PTHREAD_MUTEX_ELISION_FLAGS_NP)) + ((m)->__data.__kind & (127|PTHREAD_MUTEX_ELISION_NP)) #if LLL_PRIVATE == 0 && LLL_SHARED == 128 # define PTHREAD_MUTEX_PSHARED(m) \ diff --git a/nptl/pthread_mutex_lock.c b/nptl/pthread_mutex_lock.c index fbedfd7d3a..b37f39a0a9 100644 --- a/nptl/pthread_mutex_lock.c +++ b/nptl/pthread_mutex_lock.c @@ -25,6 +25,14 @@ #include <lowlevellock.h> #include <stap-probe.h> +#ifndef lll_lock_elision +#define lll_lock_elision(lock, try_lock, private) ({ \ + lll_lock (lock, private); 0; }) +#endif + +#ifndef lll_trylock_elision +#define lll_trylock_elision(a,t) lll_trylock(a) +#endif #ifndef LLL_MUTEX_LOCK # define LLL_MUTEX_LOCK(mutex) \ @@ -34,39 +42,60 @@ # define LLL_ROBUST_MUTEX_LOCK(mutex, id) \ lll_robust_lock ((mutex)->__data.__lock, id, \ PTHREAD_ROBUST_MUTEX_PSHARED (mutex)) +# define LLL_MUTEX_LOCK_ELISION(mutex) \ + lll_lock_elision ((mutex)->__data.__lock, (mutex)->__data.__elision, \ + PTHREAD_MUTEX_PSHARED (mutex)) +# define LLL_MUTEX_TRYLOCK_ELISION(mutex) \ + lll_trylock_elision((mutex)->__data.__lock, (mutex)->__data.__elision, \ + PTHREAD_MUTEX_PSHARED (mutex)) #endif +#ifndef FORCE_ELISION +#define FORCE_ELISION(m, s) +#endif static int __pthread_mutex_lock_full (pthread_mutex_t *mutex) __attribute_noinline__; - int __pthread_mutex_lock (mutex) pthread_mutex_t *mutex; { assert (sizeof (mutex->__size) >= sizeof (mutex->__data)); - unsigned int type = PTHREAD_MUTEX_TYPE (mutex); + unsigned int type = PTHREAD_MUTEX_TYPE_ELISION (mutex); LIBC_PROBE (mutex_entry, 1, mutex); - if (__builtin_expect (type & ~PTHREAD_MUTEX_KIND_MASK_NP, 0)) + if (__builtin_expect (type & ~(PTHREAD_MUTEX_KIND_MASK_NP + | PTHREAD_MUTEX_ELISION_FLAGS_NP), 0)) return __pthread_mutex_lock_full (mutex); - pid_t id = THREAD_GETMEM (THREAD_SELF, tid); - - if (__builtin_expect (type, PTHREAD_MUTEX_TIMED_NP) - == PTHREAD_MUTEX_TIMED_NP) + if (__builtin_expect (type == PTHREAD_MUTEX_TIMED_NP, 1)) { + FORCE_ELISION (mutex, goto elision); simple: /* Normal mutex. */ LLL_MUTEX_LOCK (mutex); assert (mutex->__data.__owner == 0); } - else if (__builtin_expect (type == PTHREAD_MUTEX_RECURSIVE_NP, 1)) +#ifdef HAVE_ELISION + else if (__builtin_expect (type == PTHREAD_MUTEX_TIMED_ELISION_NP, 1)) + { + elision: __attribute__((unused)) + /* This case can never happen on a system without elision, + as the mutex type initialization functions will not + allow to set the elision flags. */ + /* Don't record owner or users for elision case. This is a + tail call. */ + return LLL_MUTEX_LOCK_ELISION (mutex); + } +#endif + else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex) + == PTHREAD_MUTEX_RECURSIVE_NP, 1)) { /* Recursive mutex. */ + pid_t id = THREAD_GETMEM (THREAD_SELF, tid); /* Check whether we already hold the mutex. */ if (mutex->__data.__owner == id) @@ -87,7 +116,8 @@ __pthread_mutex_lock (mutex) assert (mutex->__data.__owner == 0); mutex->__data.__count = 1; } - else if (__builtin_expect (type == PTHREAD_MUTEX_ADAPTIVE_NP, 1)) + else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex) + == PTHREAD_MUTEX_ADAPTIVE_NP, 1)) { if (! __is_smp) goto simple; @@ -117,13 +147,16 @@ __pthread_mutex_lock (mutex) } else { - assert (type == PTHREAD_MUTEX_ERRORCHECK_NP); + pid_t id = THREAD_GETMEM (THREAD_SELF, tid); + assert (PTHREAD_MUTEX_TYPE (mutex) == PTHREAD_MUTEX_ERRORCHECK_NP); /* Check whether we already hold the mutex. */ if (__builtin_expect (mutex->__data.__owner == id, 0)) return EDEADLK; goto simple; } + pid_t id = THREAD_GETMEM (THREAD_SELF, tid); + /* Record the ownership. */ mutex->__data.__owner = id; #ifndef NO_INCR diff --git a/nptl/pthread_mutex_timedlock.c b/nptl/pthread_mutex_timedlock.c index 3a36424afa..689cefa2de 100644 --- a/nptl/pthread_mutex_timedlock.c +++ b/nptl/pthread_mutex_timedlock.c @@ -25,6 +25,17 @@ #include <stap-probe.h> +#ifndef lll_timedlock_elision +#define lll_timedlock_elision(a,dummy,b,c) lll_timedlock(a, b, c) +#endif + +#ifndef lll_trylock_elision +#define lll_trylock_elision(a,t) lll_trylock(a) +#endif + +#ifndef FORCE_ELISION +#define FORCE_ELISION(m, s) +#endif int pthread_mutex_timedlock (mutex, abstime) @@ -40,10 +51,11 @@ pthread_mutex_timedlock (mutex, abstime) /* We must not check ABSTIME here. If the thread does not block abstime must not be checked for a valid value. */ - switch (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex), + switch (__builtin_expect (PTHREAD_MUTEX_TYPE_ELISION (mutex), PTHREAD_MUTEX_TIMED_NP)) { /* Recursive mutex. */ + case PTHREAD_MUTEX_RECURSIVE_NP|PTHREAD_MUTEX_ELISION_NP: case PTHREAD_MUTEX_RECURSIVE_NP: /* Check whether we already hold the mutex. */ if (mutex->__data.__owner == id) @@ -78,12 +90,22 @@ pthread_mutex_timedlock (mutex, abstime) /* FALLTHROUGH */ case PTHREAD_MUTEX_TIMED_NP: + FORCE_ELISION (mutex, goto elision); simple: /* Normal mutex. */ result = lll_timedlock (mutex->__data.__lock, abstime, PTHREAD_MUTEX_PSHARED (mutex)); break; + case PTHREAD_MUTEX_TIMED_ELISION_NP: + elision: __attribute__((unused)) + /* Don't record ownership */ + return lll_timedlock_elision (mutex->__data.__lock, + mutex->__data.__spins, + abstime, + PTHREAD_MUTEX_PSHARED (mutex)); + + case PTHREAD_MUTEX_ADAPTIVE_NP: if (! __is_smp) goto simple; diff --git a/nptl/pthread_mutex_trylock.c b/nptl/pthread_mutex_trylock.c index 8f5279d2ff..600c8483b0 100644 --- a/nptl/pthread_mutex_trylock.c +++ b/nptl/pthread_mutex_trylock.c @@ -22,6 +22,16 @@ #include "pthreadP.h" #include <lowlevellock.h> +#ifndef lll_trylock_elision +#define lll_trylock_elision(a,t) lll_trylock(a) +#endif + +#ifndef DO_ELISION +#define DO_ELISION(m) 0 +#endif + +/* We don't force elision in trylock, because this can lead to inconsistent + lock state if the lock was actually busy. */ int __pthread_mutex_trylock (mutex) @@ -30,10 +40,11 @@ __pthread_mutex_trylock (mutex) int oldval; pid_t id = THREAD_GETMEM (THREAD_SELF, tid); - switch (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex), + switch (__builtin_expect (PTHREAD_MUTEX_TYPE_ELISION (mutex), PTHREAD_MUTEX_TIMED_NP)) { /* Recursive mutex. */ + case PTHREAD_MUTEX_RECURSIVE_NP|PTHREAD_MUTEX_ELISION_NP: case PTHREAD_MUTEX_RECURSIVE_NP: /* Check whether we already hold the mutex. */ if (mutex->__data.__owner == id) @@ -57,10 +68,20 @@ __pthread_mutex_trylock (mutex) } break; - case PTHREAD_MUTEX_ERRORCHECK_NP: + case PTHREAD_MUTEX_TIMED_ELISION_NP: + elision: + if (lll_trylock_elision (mutex->__data.__lock, + mutex->__data.__elision) != 0) + break; + /* Don't record the ownership. */ + return 0; + case PTHREAD_MUTEX_TIMED_NP: + if (DO_ELISION (mutex)) + goto elision; + /*FALL THROUGH*/ case PTHREAD_MUTEX_ADAPTIVE_NP: - /* Normal mutex. */ + case PTHREAD_MUTEX_ERRORCHECK_NP: if (lll_trylock (mutex->__data.__lock) != 0) break; @@ -378,4 +399,9 @@ __pthread_mutex_trylock (mutex) return EBUSY; } + +#ifndef __pthread_mutex_trylock +#ifndef pthread_mutex_trylock strong_alias (__pthread_mutex_trylock, pthread_mutex_trylock) +#endif +#endif diff --git a/nptl/pthread_mutex_unlock.c b/nptl/pthread_mutex_unlock.c index c0249f76ea..6914503626 100644 --- a/nptl/pthread_mutex_unlock.c +++ b/nptl/pthread_mutex_unlock.c @@ -23,6 +23,10 @@ #include <lowlevellock.h> #include <stap-probe.h> +#ifndef lll_unlock_elision +#define lll_unlock_elision(a,b) ({ lll_unlock (a,b); 0; }) +#endif + static int internal_function __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr) @@ -34,8 +38,9 @@ __pthread_mutex_unlock_usercnt (mutex, decr) pthread_mutex_t *mutex; int decr; { - int type = PTHREAD_MUTEX_TYPE (mutex); - if (__builtin_expect (type & ~PTHREAD_MUTEX_KIND_MASK_NP, 0)) + int type = PTHREAD_MUTEX_TYPE_ELISION (mutex); + if (__builtin_expect (type & + ~(PTHREAD_MUTEX_KIND_MASK_NP|PTHREAD_MUTEX_ELISION_FLAGS_NP), 0)) return __pthread_mutex_unlock_full (mutex, decr); if (__builtin_expect (type, PTHREAD_MUTEX_TIMED_NP) @@ -55,7 +60,14 @@ __pthread_mutex_unlock_usercnt (mutex, decr) return 0; } - else if (__builtin_expect (type == PTHREAD_MUTEX_RECURSIVE_NP, 1)) + else if (__builtin_expect (type == PTHREAD_MUTEX_TIMED_ELISION_NP, 1)) + { + /* Don't reset the owner/users fields for elision. */ + return lll_unlock_elision (mutex->__data.__lock, + PTHREAD_MUTEX_PSHARED (mutex)); + } + else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex) + == PTHREAD_MUTEX_RECURSIVE_NP, 1)) { /* Recursive mutex. */ if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)) @@ -66,7 +78,8 @@ __pthread_mutex_unlock_usercnt (mutex, decr) return 0; goto normal; } - else if (__builtin_expect (type == PTHREAD_MUTEX_ADAPTIVE_NP, 1)) + else if (__builtin_expect (PTHREAD_MUTEX_TYPE (mutex) + == PTHREAD_MUTEX_ADAPTIVE_NP, 1)) goto normal; else { diff --git a/nptl/sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c b/nptl/sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c index b417da5e22..7b6fbc18aa 100644 --- a/nptl/sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c +++ b/nptl/sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c @@ -2,8 +2,15 @@ #define LLL_MUTEX_LOCK(mutex) \ lll_cond_lock ((mutex)->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex)) + +/* Not actually elided so far. Needed? */ +#define LLL_MUTEX_LOCK_ELISION(mutex) \ + ({ lll_cond_lock ((mutex)->__data.__lock, PTHREAD_MUTEX_PSHARED (mutex)); 0; }) + #define LLL_MUTEX_TRYLOCK(mutex) \ lll_cond_trylock ((mutex)->__data.__lock) +#define LLL_MUTEX_TRYLOCK_ELISION(mutex) LLL_MUTEX_TRYLOCK(mutex) + #define LLL_ROBUST_MUTEX_LOCK(mutex, id) \ lll_robust_cond_lock ((mutex)->__data.__lock, id, \ PTHREAD_ROBUST_MUTEX_PSHARED (mutex)) diff --git a/nptl/sysdeps/unix/sysv/linux/x86/bits/pthreadtypes.h b/nptl/sysdeps/unix/sysv/linux/x86/bits/pthreadtypes.h index ccd896ca03..1852e07842 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86/bits/pthreadtypes.h +++ b/nptl/sysdeps/unix/sysv/linux/x86/bits/pthreadtypes.h @@ -101,14 +101,23 @@ typedef union binary compatibility. */ int __kind; #ifdef __x86_64__ - int __spins; + short __spins; + short __elision; __pthread_list_t __list; # define __PTHREAD_MUTEX_HAVE_PREV 1 +# define __PTHREAD_MUTEX_HAVE_ELISION 1 #else unsigned int __nusers; __extension__ union { - int __spins; + struct + { + short __espins; + short __elision; +# define __spins d.__espins +# define __elision d.__elision +# define __PTHREAD_MUTEX_HAVE_ELISION 2 + } d; __pthread_slist_t __list; }; #endif diff --git a/nptl/sysdeps/unix/sysv/linux/x86/elision-trylock.c b/nptl/sysdeps/unix/sysv/linux/x86/elision-trylock.c index 2939fc9640..689a6fbe2a 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86/elision-trylock.c +++ b/nptl/sysdeps/unix/sysv/linux/x86/elision-trylock.c @@ -24,9 +24,8 @@ #define aconf __elision_aconf -/* Try to elide a futex trylock. FUTEX is the futex variable. TRY_LOCK is the - adaptation counter in the mutex. UPGRADED is != 0 when this is for an - automatically upgraded lock. */ +/* Try to elide a futex trylock. FUTEX is the futex variable. ADAPT_COUNT is the + adaptation counter in the mutex. */ int __lll_trylock_elision (int *futex, short *adapt_count) diff --git a/nptl/sysdeps/unix/sysv/linux/x86/force-elision.h b/nptl/sysdeps/unix/sysv/linux/x86/force-elision.h new file mode 100644 index 0000000000..703e930be1 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86/force-elision.h @@ -0,0 +1,31 @@ +/* force-elision.h: Automatic enabling of elision for mutexes + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* Check for elision on this lock without upgrading. */ +#define DO_ELISION(m) \ + (__pthread_force_elision \ + && (m->__data.__kind & PTHREAD_MUTEX_NO_ELISION_NP) == 0) \ + +/* Automatically enable elision for existing user lock kinds. */ +#define FORCE_ELISION(m, s) \ + if (__pthread_force_elision \ + && (m->__data.__kind & PTHREAD_MUTEX_ELISION_FLAGS_NP) == 0) \ + { \ + mutex->__data.__kind |= PTHREAD_MUTEX_ELISION_NP; \ + s; \ + } diff --git a/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_cond_lock.c b/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_cond_lock.c new file mode 100644 index 0000000000..962f101073 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_cond_lock.c @@ -0,0 +1,21 @@ +/* Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* The cond lock is not actually elided yet, but we still need to handle + already elided locks. */ +#include <elision-conf.h> +#include "sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c" diff --git a/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_lock.c b/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_lock.c new file mode 100644 index 0000000000..e639460530 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_lock.c @@ -0,0 +1,21 @@ +/* Elided version of pthread_mutex_lock. + Copyright (C) 2011, 2012, 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ +#include <elision-conf.h> +#include "force-elision.h" + +#include "nptl/pthread_mutex_lock.c" diff --git a/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_timedlock.c b/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_timedlock.c new file mode 100644 index 0000000000..5115d0304a --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_timedlock.c @@ -0,0 +1,20 @@ +/* Elided version of pthread_mutex_timedlock. + Copyright (C) 2011, 2012, 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ +#include <elision-conf.h> +#include "force-elision.h" +#include "nptl/pthread_mutex_timedlock.c" diff --git a/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_trylock.c b/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_trylock.c new file mode 100644 index 0000000000..9bb4a659d4 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/x86/pthread_mutex_trylock.c @@ -0,0 +1,21 @@ +/* Elided version of pthread_mutex_trylock. + Copyright (C) 2011, 2012, 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ +#include <elision-conf.h> +#include "force-elision.h" + +#include "nptl/pthread_mutex_trylock.c" |