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author | Ulrich Drepper <drepper@redhat.com> | 2004-03-24 06:36:06 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2004-03-24 06:36:06 +0000 |
commit | 2c0b891afe29dd28d0e6d75e0da8681db7fd100d (patch) | |
tree | 06fead8fc58acefbe9a9ebe353f0d596e73522ad /nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h | |
parent | 565699e492f741bc4563c73046f457924c6f708a (diff) | |
download | glibc-2c0b891afe29dd28d0e6d75e0da8681db7fd100d.tar.gz glibc-2c0b891afe29dd28d0e6d75e0da8681db7fd100d.tar.xz glibc-2c0b891afe29dd28d0e6d75e0da8681db7fd100d.zip |
Update.
* sysdeps/unix/sysv/linux/smp.h: New file. * sysdeps/unix/sysv/linux/sh/smp.h: New file. * init.c: Define __is_smp. (__pthread_initialize_minimal_internal): Call is_smp_system to initialize __is_smp. * pthreadP.h: Declare __is_smp. Define MAX_ADAPTIVE_COUNT is necessary. * pthread_mutex_init.c: Add comment regarding __spins field. * pthread_mutex_lock.c: Implement adaptive mutex type. * pthread_mutex_timedlock.c: Likewise. * sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c: Likewise. * sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h (pthread_mutex_t): Add __spins field. * sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/ia64/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h: Define lll_mutex_cond_trylock. * sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/s390/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/i386/bits/pthreadtypes.h: Likewise. Define BUSY_WAIT_NOP. * sysdeps/unix/sysv/linux/ia64/bits/pthreadtypes.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: Likewise. * tst-mutex5.c: Add support for testing adaptive mutexes. * tst-mutex7.c: Likewise. * tst-mutex5a.c: New file. * tst-mutex7a.c: New file. * Makefile (tests): Add tst-mutex5a and tst-mutex7a.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h index a9823d8d4b..b86f11c9b4 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h @@ -40,6 +40,7 @@ /* Initializer for compatibility lock. */ #define LLL_MUTEX_LOCK_INITIALIZER (0) #define LLL_MUTEX_LOCK_INITIALIZER_LOCKED (1) +#define LLL_MUTEX_LOCK_INITIALIZER_WAITERS (2) #ifdef PIC @@ -60,6 +61,9 @@ # define LLL_ENTER_KERNEL "int $0x80\n\t" #endif +/* Delay in spinlock loop. */ +#define BUSY_WAIT_NOP asm ("rep; nop") + #define lll_futex_wait(futex, val) \ do { \ @@ -117,6 +121,16 @@ extern int __lll_mutex_unlock_wake (int *__futex) ret; }) +#define lll_mutex_cond_trylock(futex) \ + ({ int ret; \ + __asm __volatile (LOCK_INSTR "cmpxchgl %2, %1" \ + : "=a" (ret), "=m" (futex) \ + : "r" (LLL_MUTEX_LOCK_INITIALIZER_WAITERS), \ + "m" (futex), "0" (LLL_MUTEX_LOCK_INITIALIZER) \ + : "memory"); \ + ret; }) + + #define lll_mutex_lock(futex) \ (void) ({ int ignore1, ignore2; \ __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \ |