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author | Ulrich Drepper <drepper@redhat.com> | 2007-08-01 04:47:26 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2007-08-01 04:47:26 +0000 |
commit | e51deae7f6ba2e490d5faeb8fbf4eeb32ae8f1ee (patch) | |
tree | 57923e71faf0df5ee539cd3ee3a1530f069aad91 /nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h | |
parent | 1475e2012f267f69dab879ce146f99128fd21653 (diff) | |
download | glibc-e51deae7f6ba2e490d5faeb8fbf4eeb32ae8f1ee.tar.gz glibc-e51deae7f6ba2e490d5faeb8fbf4eeb32ae8f1ee.tar.xz glibc-e51deae7f6ba2e490d5faeb8fbf4eeb32ae8f1ee.zip |
* sysdeps/unix/sysv/linux/powerpc/sem_post.c (__new_sem_post):
Use __asm __volatile (__lll_acq_instr ::: "memory") instead of atomic_full_barrier. 2007-07-31 Jakub Jelinek <jakub@redhat.com> * allocatestack.c (stack_cache_lock): Change type to int. (get_cached_stack, allocate_stack, __deallocate_stack, __make_stacks_executable, __find_thread_by_id, __nptl_setxid, __pthread_init_static_tls, __wait_lookup_done): Add LLL_PRIVATE as second argument to lll_lock and lll_unlock macros on stack_cache_lock. * pthread_create.c (__find_in_stack_list): Likewise. (start_thread): Similarly with pd->lock. Use lll_robust_dead macro instead of lll_robust_mutex_dead, pass LLL_SHARED to it as second argument. * descr.h (struct pthread): Change lock and setxid_futex field type to int. * old_pthread_cond_broadcast.c (__pthread_cond_broadcast_2_0): Use LLL_LOCK_INITIALIZER instead of LLL_MUTEX_LOCK_INITIALIZER. * old_pthread_cond_signal.c (__pthread_cond_signal_2_0): Likewise. * old_pthread_cond_timedwait.c (__pthread_cond_timedwait_2_0): Likewise. * old_pthread_cond_wait.c (__pthread_cond_wait_2_0): Likewise. * pthread_cond_init.c (__pthread_cond_init): Likewise. * pthreadP.h (__attr_list_lock): Change type to int. * pthread_attr_init.c (__attr_list_lock): Likewise. * pthread_barrier_destroy.c (pthread_barrier_destroy): Pass ibarrier->private ^ FUTEX_PRIVATE_FLAG as second argument to lll_{,un}lock. * pthread_barrier_wait.c (pthread_barrier_wait): Likewise and also for lll_futex_{wake,wait}. * pthread_barrier_init.c (pthread_barrier_init): Make iattr a pointer to const. * pthread_cond_broadcast.c (__pthread_cond_broadcast): Pass LLL_SHARED as second argument to lll_{,un}lock. * pthread_cond_destroy.c (__pthread_cond_destroy): Likewise. * pthread_cond_signal.c (__pthread_cond_singal): Likewise. * pthread_cond_timedwait.c (__pthread_cond_timedwait): Likewise. * pthread_cond_wait.c (__condvar_cleanup, __pthread_cond_wait): Likewise. * pthread_getattr_np.c (pthread_getattr_np): Add LLL_PRIVATE as second argument to lll_{,un}lock macros on pd->lock. * pthread_getschedparam.c (__pthread_getschedparam): Likewise. * pthread_setschedparam.c (__pthread_setschedparam): Likewise. * pthread_setschedprio.c (pthread_setschedprio): Likewise. * tpp.c (__pthread_tpp_change_priority, __pthread_current_priority): Likewise. * sysdeps/pthread/createthread.c (do_clone, create_thread): Likewise. * pthread_once.c (once_lock): Change type to int. (__pthread_once): Pass LLL_PRIVATE as second argument to lll_{,un}lock macros on once_lock. * pthread_rwlock_rdlock.c (__pthread_rwlock_rdlock): Use lll_{,un}lock macros instead of lll_mutex_{,un}lock, pass rwlock->__data.__shared as second argument to them and similarly for lll_futex_w*. * pthread_rwlock_timedrdlock.c (pthread_rwlock_timedrdlock): Likewise. * pthread_rwlock_timedwrlock.c (pthread_rwlock_timedwrlock): Likewise. * pthread_rwlock_tryrdlock.c (__pthread_rwlock_tryrdlock): Likewise. * pthread_rwlock_trywrlock.c (__pthread_rwlock_trywrlock): Likewise. * pthread_rwlock_unlock.c (__pthread_rwlock_unlock): Likewise. * pthread_rwlock_wrlock.c (__pthread_rwlock_wrlock): Likewise. * sem_close.c (sem_close): Pass LLL_PRIVATE as second argument to lll_{,un}lock macros on __sem_mappings_lock. * sem_open.c (check_add_mapping): Likewise. (__sem_mappings_lock): Change type to int. * semaphoreP.h (__sem_mappings_lock): Likewise. * pthread_mutex_lock.c (LLL_MUTEX_LOCK, LLL_MUTEX_TRYLOCK, LLL_ROBUST_MUTEX_LOCK): Use lll_{,try,robust_}lock macros instead of lll_*mutex_*, pass LLL_SHARED as last argument. (__pthread_mutex_lock): Use lll_unlock instead of lll_mutex_unlock, pass LLL_SHARED as last argument. * sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c (LLL_MUTEX_LOCK, LLL_MUTEX_TRYLOCK, LLL_ROBUST_MUTEX_LOCK): Use lll_{cond_,cond_try,robust_cond}lock macros instead of lll_*mutex_*, pass LLL_SHARED as last argument. * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Use lll_{timed,try,robust_timed,un}lock instead of lll_*mutex*, pass LLL_SHARED as last argument. * pthread_mutex_trylock.c (__pthread_mutex_trylock): Similarly. * pthread_mutex_unlock.c (__pthread_mutex_unlock_usercnt): Similarly. * sysdeps/pthread/bits/libc-lock.h (__libc_lock_lock, __libc_lock_lock_recursive, __libc_lock_unlock, __libc_lock_unlock_recursive): Pass LLL_PRIVATE as second argument to lll_{,un}lock. * sysdeps/pthread/bits/stdio-lock.h (_IO_lock_lock, _IO_lock_unlock): Likewise. * sysdeps/unix/sysv/linux/fork.c (__libc_fork): Don't use compound literal. * sysdeps/unix/sysv/linux/unregister-atfork.c (__unregister_atfork): Pass LLL_PRIVATE as second argument to lll_{,un}lock macros on __fork_lock. * sysdeps/unix/sysv/linux/register-atfork.c (__register_atfork, free_mem): Likewise. (__fork_lock): Change type to int. * sysdeps/unix/sysv/linux/fork.h (__fork_lock): Likewise. * sysdeps/unix/sysv/linux/sem_post.c (__new_sem_post): Pass isem->private ^ FUTEX_PRIVATE_FLAG as second argument to lll_futex_wake. * sysdeps/unix/sysv/linux/sem_timedwait.c (sem_timedwait): Likewise. * sysdeps/unix/sysv/linux/sem_wait.c (__new_sem_wait): Likewise. * sysdeps/unix/sysv/linux/lowlevellock.c (__lll_lock_wait_private): New function. (__lll_lock_wait, __lll_timedlock_wait): Add private argument and pass it through to lll_futex_*wait, only compile in when IS_IN_libpthread. * sysdeps/unix/sysv/linux/lowlevelrobustlock.c (__lll_robust_lock_wait, __lll_robust_timedlock_wait): Add private argument and pass it through to lll_futex_*wait. * sysdeps/unix/sysv/linux/alpha/lowlevellock.h: Renamed all lll_mutex_* resp. lll_robust_mutex_* macros to lll_* resp. lll_robust_*. Renamed all __lll_mutex_* resp. __lll_robust_mutex_* inline functions to __lll_* resp. __lll_robust_*. (LLL_MUTEX_LOCK_INITIALIZER): Remove. (lll_mutex_dead): Add private argument. (__lll_lock_wait_private): New prototype. (__lll_lock_wait, __lll_robust_lock_wait, __lll_lock_timedwait, __lll_robust_lock_timedwait): Add private argument to prototypes. (__lll_lock): Add private argument, if it is constant LLL_PRIVATE, call __lll_lock_wait_private, otherwise pass private to __lll_lock_wait. (__lll_robust_lock, __lll_cond_lock, __lll_timedlock, __lll_robust_timedlock): Add private argument, pass it to __lll_*wait functions. (__lll_unlock): Add private argument, if it is constant LLL_PRIVATE, call __lll_unlock_wake_private, otherwise pass private to __lll_unlock_wake. (__lll_robust_unlock): Add private argument, pass it to __lll_robust_unlock_wake. (lll_lock, lll_robust_lock, lll_cond_lock, lll_timedlock, lll_robust_timedlock, lll_unlock, lll_robust_unlock): Add private argument, pass it through to __lll_* inline function. (__lll_mutex_unlock_force, lll_mutex_unlock_force): Remove. (lll_lock_t): Remove. (__lll_cond_wait, __lll_cond_timedwait, __lll_cond_wake, __lll_cond_broadcast, lll_cond_wait, lll_cond_timedwait, lll_cond_wake, lll_cond_broadcast): Remove. * sysdeps/unix/sysv/linux/ia64/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/sparc/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/i386/lowlevellock.h: Allow including the header from assembler. Renamed all lll_mutex_* resp. lll_robust_mutex_* macros to lll_* resp. lll_robust_*. (LOCK, FUTEX_CMP_REQUEUE, FUTEX_WAKE_OP, FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define. (LLL_MUTEX_LOCK_INITIALIZER, LLL_MUTEX_LOCK_INITIALIZER_LOCKED, LLL_MUTEX_LOCK_INITIALIZER_WAITERS): Remove. (__lll_mutex_lock_wait, __lll_mutex_timedlock_wait, __lll_mutex_unlock_wake, __lll_lock_wait, __lll_unlock_wake): Remove prototype. (__lll_trylock_asm, __lll_lock_asm_start, __lll_unlock_asm): Define. (lll_robust_trylock, lll_cond_trylock): Use LLL_LOCK_INITIALIZER* rather than LLL_MUTEX_LOCK_INITIALIZER* macros. (lll_trylock): Likewise, use __lll_trylock_asm, pass MULTIPLE_THREADS_OFFSET as another asm operand. (lll_lock): Add private argument, use __lll_lock_asm_start, pass MULTIPLE_THREADS_OFFSET as last asm operand, call __lll_lock_wait_private if private is constant LLL_PRIVATE, otherwise pass private as another argument to __lll_lock_wait. (lll_robust_lock, lll_cond_lock, lll_robust_cond_lock, lll_timedlock, lll_robust_timedlock): Add private argument, pass private as another argument to __lll_*lock_wait call. (lll_unlock): Add private argument, use __lll_unlock_asm, pass MULTIPLE_THREADS_OFFSET as another asm operand, call __lll_unlock_wake_private if private is constant LLL_PRIVATE, otherwise pass private as another argument to __lll_unlock_wake. (lll_robust_unlock): Add private argument, pass private as another argument to __lll_unlock_wake. (lll_robust_dead): Add private argument, use __lll_private_flag macro. (lll_islocked): Use LLL_LOCK_INITIALIZER instead of LLL_MUTEX_LOCK_INITIALIZER. (lll_lock_t): Remove. (LLL_LOCK_INITIALIZER_WAITERS): Define. (__lll_cond_wait, __lll_cond_timedwait, __lll_cond_wake, __lll_cond_broadcast, lll_cond_wait, lll_cond_timedwait, lll_cond_wake, lll_cond_broadcast): Remove. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/i386/i486/libc-lowlevellock.S: Revert 2007-05-2{3,9} changes. * sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S: Include kernel-features.h and lowlevellock.h. (LOAD_PRIVATE_FUTEX_WAIT): Define. (LOAD_FUTEX_WAIT): Rewritten. (LOCK, SYS_gettimeofday, SYS_futex, FUTEX_WAIT, FUTEX_WAKE): Don't define. (__lll_lock_wait_private, __lll_unlock_wake_private): New functions. (__lll_mutex_lock_wait): Rename to ... (__lll_lock_wait): ... this. Take futex addr from %edx instead of %ecx, %ecx is now private argument. Don't compile in for libc.so. (__lll_mutex_timedlock_wait): Rename to ... (__lll_timedlock_wait): ... this. Use __NR_gettimeofday. %esi contains private argument. Don't compile in for libc.so. (__lll_mutex_unlock_wake): Rename to ... (__lll_unlock_wake): ... this. %ecx contains private argument. Don't compile in for libc.so. (__lll_timedwait_tid): Use __NR_gettimeofday. * sysdeps/unix/sysv/linux/i386/i486/lowlevelrobustlock.S: Include kernel-features.h and lowlevellock.h. (LOAD_FUTEX_WAIT): Define. (LOCK, SYS_gettimeofday, SYS_futex, FUTEX_WAIT, FUTEX_WAKE): Don't define. (__lll_robust_mutex_lock_wait): Rename to ... (__lll_robust_lock_wait): ... this. Futex addr is now in %edx argument, %ecx argument contains private. Use LOAD_FUTEX_WAIT macro. (__lll_robust_mutex_timedlock_wait): Rename to ... (__lll_robust_timedlock_wait): ... this. Use __NR_gettimeofday. %esi argument contains private, use LOAD_FUTEX_WAIT macro. * sysdeps/unix/sysv/linux/i386/i486/pthread_barrier_wait.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (pthread_barrier_wait): Rename __lll_mutex_* to __lll_*, pass PRIVATE(%ebx) ^ LLL_SHARED as private argument in %ecx to __lll_lock_wait and __lll_unlock_wake, pass MUTEX(%ebx) address to __lll_lock_wait in %edx. * sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S: Include lowlevellock.h and pthread-errnos.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_REQUEUE, FUTEX_CMP_REQUEUE, EINVAL, LOCK): Don't define. (__pthread_cond_broadcast): Rename __lll_mutex_* to __lll_*, pass cond_lock address in %edx rather than %ecx to __lll_lock_wait, pass LLL_SHARED in %ecx to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S: Include lowlevellock.h and pthread-errnos.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_WAKE_OP, FUTEX_OP_CLEAR_WAKE_IF_GT_ONE, EINVAL, LOCK): Don't define. (__pthread_cond_signal): Rename __lll_mutex_* to __lll_*, pass cond_lock address in %edx rather than %ecx to __lll_lock_wait, pass LLL_SHARED in %ecx to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S: Include lowlevellock.h. (SYS_futex, SYS_gettimeofday, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_cond_timedwait): Rename __lll_mutex_* to __lll_*, pass cond_lock address in %edx rather than %ecx to __lll_lock_wait, pass LLL_SHARED in %ecx to both __lll_lock_wait and __lll_unlock_wake. Use __NR_gettimeofday. * sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_cond_wait, __condvar_w_cleanup): Rename __lll_mutex_* to __lll_*, pass cond_lock address in %edx rather than %ecx to __lll_lock_wait, pass LLL_SHARED in %ecx to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_rdlock.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_rwlock_rdlock): Rename __lll_mutex_* to __lll_*, pass MUTEX(%ebx) address in %edx rather than %ecx to __lll_lock_wait, pass PSHARED(%ebx) in %ecx to both __lll_lock_wait and __lll_unlock_wake. Move return value from %ecx to %edx register. * sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedrdlock.S: Include lowlevellock.h. (SYS_futex, SYS_gettimeofday, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_rwlock_wrlock): Rename __lll_mutex_* to __lll_*, pass MUTEX(%ebp) address in %edx rather than %ecx to __lll_lock_wait, pass PSHARED(%ebp) in %ecx to both __lll_lock_wait and __lll_unlock_wake. Move return value from %ecx to %edx register. Use __NR_gettimeofday. * sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_timedwrlock.S: Include lowlevellock.h. (SYS_futex, SYS_gettimeofday, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_rwlock_wrlock): Rename __lll_mutex_* to __lll_*, pass MUTEX(%ebp) address in %edx rather than %ecx to __lll_lock_wait, pass PSHARED(%ebp) in %ecx to both __lll_lock_wait and __lll_unlock_wake. Move return value from %ecx to %edx register. Use __NR_gettimeofday. * sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_rwlock_unlock): Rename __lll_mutex_* to __lll_*, pass MUTEX(%edi) address in %edx rather than %ecx to __lll_lock_wait, pass PSHARED(%edi) in %ecx to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_wrlock.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_rwlock_wrlock): Rename __lll_mutex_* to __lll_*, pass MUTEX(%ebx) address in %edx rather than %ecx to __lll_lock_wait, pass PSHARED(%ebx) in %ecx to both __lll_lock_wait and __lll_unlock_wake. Move return value from %ecx to %edx register. * sysdeps/unix/sysv/linux/i386/pthread_once.S: Include lowlevellock.h. (LOCK, SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_PRIVATE_FLAG): Don't define. * sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Include lowlevellock.h. (LOCK, SYS_futex, FUTEX_WAKE): Don't define. * sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S: Include lowlevellock.h. (LOCK, SYS_futex, SYS_gettimeofday, FUTEX_WAIT): Don't define. (sem_timedwait): Use __NR_gettimeofday. * sysdeps/unix/sysv/linux/i386/i486/sem_trywait.S: Include lowlevellock.h. (LOCK): Don't define. * sysdeps/unix/sysv/linux/i386/i486/sem_wait.S: Include lowlevellock.h. (LOCK, SYS_futex, FUTEX_WAIT): Don't define. * sysdeps/unix/sysv/linux/powerpc/sem_post.c: Wake only when there are waiters. * sysdeps/unix/sysv/linux/x86_64/libc-lowlevellock.S: Revert 2007-05-2{3,9} changes. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Include kernel-features.h and lowlevellock.h. (LOAD_PRIVATE_FUTEX_WAIT): Define. (LOAD_FUTEX_WAIT): Rewritten. (LOCK, SYS_futex, FUTEX_WAIT, FUTEX_WAKE): Don't define. (__lll_lock_wait_private, __lll_unlock_wake_private): New functions. (__lll_mutex_lock_wait): Rename to ... (__lll_lock_wait): ... this. %esi is now private argument. Don't compile in for libc.so. (__lll_mutex_timedlock_wait): Rename to ... (__lll_timedlock_wait): ... this. %esi contains private argument. Don't compile in for libc.so. (__lll_mutex_unlock_wake): Rename to ... (__lll_unlock_wake): ... this. %esi contains private argument. Don't compile in for libc.so. * sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S: Include kernel-features.h and lowlevellock.h. (LOAD_FUTEX_WAIT): Define. (LOCK, SYS_futex, FUTEX_WAIT, FUTEX_WAKE): Don't define. (__lll_robust_mutex_lock_wait): Rename to ... (__lll_robust_lock_wait): ... this. %esi argument contains private. Use LOAD_FUTEX_WAIT macro. (__lll_robust_mutex_timedlock_wait): Rename to ... (__lll_robust_timedlock_wait): ... this. %esi argument contains private, use LOAD_FUTEX_WAIT macro. * sysdeps/unix/sysv/linux/x86_64/pthread_barrier_wait.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (pthread_barrier_wait): Rename __lll_mutex_* to __lll_*, pass PRIVATE(%rdi) ^ LLL_SHARED as private argument in %esi to __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S: Include lowlevellock.h and pthread-errnos.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_REQUEUE, FUTEX_CMP_REQUEUE, EINVAL, LOCK): Don't define. (__pthread_cond_broadcast): Rename __lll_mutex_* to __lll_*, pass LLL_SHARED in %esi to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S: Include lowlevellock.h and pthread-errnos.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_WAKE_OP, FUTEX_OP_CLEAR_WAKE_IF_GT_ONE, EINVAL, LOCK): Don't define. (__pthread_cond_signal): Rename __lll_mutex_* to __lll_*, pass LLL_SHARED in %esi to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_cond_timedwait): Rename __lll_mutex_* to __lll_*, pass LLL_SHARED in %esi to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, LOCK): Don't define. (__pthread_cond_wait, __condvar_cleanup): Rename __lll_mutex_* to __lll_*, pass LLL_SHARED in %esi to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_PRIVATE_FLAG, LOCK): Don't define. (__pthread_rwlock_rdlock): Rename __lll_mutex_* to __lll_*, pass PSHARED(%rdi) in %esi to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedrdlock.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_PRIVATE_FLAG, LOCK): Don't define. (__pthread_rwlock_wrlock): Rename __lll_mutex_* to __lll_*, pass PSHARED(%rdi) in %esi to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_timedwrlock.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_PRIVATE_FLAG, LOCK): Don't define. (__pthread_rwlock_wrlock): Rename __lll_mutex_* to __lll_*, pass PSHARED(%rdi) in %esi to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_PRIVATE_FLAG, LOCK): Don't define. (__pthread_rwlock_unlock): Rename __lll_mutex_* to __lll_*, pass PSHARED(%rdi) in %esi to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_wrlock.S: Include lowlevellock.h. (SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_PRIVATE_FLAG, LOCK): Don't define. (__pthread_rwlock_wrlock): Rename __lll_mutex_* to __lll_*, pass PSHARED(%rdi) in %ecx to both __lll_lock_wait and __lll_unlock_wake. * sysdeps/unix/sysv/linux/x86_64/pthread_once.S: Include lowlevellock.h. (LOCK, SYS_futex, FUTEX_WAIT, FUTEX_WAKE, FUTEX_PRIVATE_FLAG): Don't define. * sysdeps/unix/sysv/linux/x86_64/sem_post.S: Include lowlevellock.h. (LOCK, SYS_futex, FUTEX_WAKE): Don't define. * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S: Include lowlevellock.h. (LOCK, SYS_futex, FUTEX_WAIT): Don't define. * sysdeps/unix/sysv/linux/x86_64/sem_trywait.S: Include lowlevellock.h. (LOCK): Don't define. * sysdeps/unix/sysv/linux/x86_64/sem_wait.S: Include lowlevellock.h. (LOCK, SYS_futex, FUTEX_WAIT): Don't define. * sysdeps/unix/sysv/linux/sparc/internaltypes.h: New file. * sysdeps/unix/sysv/linux/sparc/pthread_barrier_destroy.c: New file. * sysdeps/unix/sysv/linux/sparc/pthread_barrier_init.c: New file. * sysdeps/unix/sysv/linux/sparc/pthread_barrier_wait.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/lowlevellock.c (__lll_lock_wait_private): New function. (__lll_lock_wait, __lll_timedlock_wait): Add private argument, pass it to lll_futex_*wait. Don't compile in for libc.so. * sysdeps/unix/sysv/linux/sparc/sparc32/pthread_barrier_init.c: Remove. * sysdeps/unix/sysv/linux/sparc/sparc32/pthread_barrier_wait.c (struct sparc_pthread_barrier): Remove. (pthread_barrier_wait): Use union sparc_pthread_barrier instead of struct sparc_pthread_barrier. Pass ibarrier->s.pshared ? LLL_SHARED : LLL_PRIVATE to lll_{,un}lock and lll_futex_wait macros. * sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/pthread_barrier_init.c: Remove. * sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/pthread_barrier_wait.c: Include sparc pthread_barrier_wait.c instead of generic one.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h | 549 |
1 files changed, 259 insertions, 290 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h index 56f63a4623..2f663aa68b 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/i386/lowlevellock.h @@ -20,28 +20,41 @@ #ifndef _LOWLEVELLOCK_H #define _LOWLEVELLOCK_H 1 -#include <time.h> -#include <sys/param.h> -#include <bits/pthreadtypes.h> -#include <kernel-features.h> -#include <tcb-offsets.h> - -#ifndef LOCK_INSTR -# ifdef UP -# define LOCK_INSTR /* nothing */ -# else -# define LOCK_INSTR "lock;" +#ifndef __ASSEMBLER__ +# include <time.h> +# include <sys/param.h> +# include <bits/pthreadtypes.h> +# include <kernel-features.h> +# include <tcb-offsets.h> + +# ifndef LOCK_INSTR +# ifdef UP +# define LOCK_INSTR /* nothing */ +# else +# define LOCK_INSTR "lock;" +# endif +# endif +#else +# ifndef LOCK +# ifdef UP +# define LOCK +# else +# define LOCK lock +# endif # endif #endif #define SYS_futex 240 #define FUTEX_WAIT 0 #define FUTEX_WAKE 1 +#define FUTEX_CMP_REQUEUE 4 +#define FUTEX_WAKE_OP 5 #define FUTEX_LOCK_PI 6 #define FUTEX_UNLOCK_PI 7 #define FUTEX_TRYLOCK_PI 8 #define FUTEX_PRIVATE_FLAG 128 +#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1) /* Values for 'private' parameter of locking macros. Yes, the definition seems to be backwards. But it is not. The bit will be @@ -76,11 +89,12 @@ # endif #endif +#ifndef __ASSEMBLER__ /* Initializer for compatibility lock. */ -#define LLL_MUTEX_LOCK_INITIALIZER (0) -#define LLL_MUTEX_LOCK_INITIALIZER_LOCKED (1) -#define LLL_MUTEX_LOCK_INITIALIZER_WAITERS (2) +#define LLL_LOCK_INITIALIZER (0) +#define LLL_LOCK_INITIALIZER_LOCKED (1) +#define LLL_LOCK_INITIALIZER_WAITERS (2) #ifdef PIC @@ -102,7 +116,7 @@ #endif /* Delay in spinlock loop. */ -#define BUSY_WAIT_NOP asm ("rep; nop") +#define BUSY_WAIT_NOP asm ("rep; nop") #define LLL_STUB_UNWIND_INFO_START \ @@ -217,332 +231,309 @@ LLL_STUB_UNWIND_INFO_END } while (0) -/* Does not preserve %eax and %ecx. */ -extern int __lll_mutex_lock_wait (int val, int *__futex) - __attribute ((regparm (2))) attribute_hidden; -/* Does not preserve %eax, %ecx, and %edx. */ -extern int __lll_mutex_timedlock_wait (int val, int *__futex, - const struct timespec *abstime) - __attribute ((regparm (3))) attribute_hidden; -/* Preserves all registers but %eax. */ -extern int __lll_mutex_unlock_wake (int *__futex) - __attribute ((regparm (1))) attribute_hidden; - - -/* NB: in the lll_mutex_trylock macro we simply return the value in %eax +/* NB: in the lll_trylock macro we simply return the value in %eax after the cmpxchg instruction. In case the operation succeded this value is zero. In case the operation failed, the cmpxchg instruction has loaded the current value of the memory work which is guaranteed to be nonzero. */ -#define lll_mutex_trylock(futex) \ +#if defined NOT_IN_libc || defined UP +# define __lll_trylock_asm LOCK_INSTR "cmpxchgl %2, %1" +#else +# define __lll_trylock_asm "cmpl $0, %%gs:%P5\n\t" \ + "je 0f\n\t" \ + "lock\n" \ + "0:\tcmpxchgl %2, %1" +#endif + +#define lll_trylock(futex) \ ({ int ret; \ - __asm __volatile (LOCK_INSTR "cmpxchgl %2, %1" \ + __asm __volatile (__lll_trylock_asm \ : "=a" (ret), "=m" (futex) \ - : "r" (LLL_MUTEX_LOCK_INITIALIZER_LOCKED), "m" (futex),\ - "0" (LLL_MUTEX_LOCK_INITIALIZER) \ + : "r" (LLL_LOCK_INITIALIZER_LOCKED), "m" (futex), \ + "0" (LLL_LOCK_INITIALIZER), \ + "i" (MULTIPLE_THREADS_OFFSET) \ : "memory"); \ ret; }) - -#define lll_robust_mutex_trylock(futex, id) \ +#define lll_robust_trylock(futex, id) \ ({ int ret; \ __asm __volatile (LOCK_INSTR "cmpxchgl %2, %1" \ : "=a" (ret), "=m" (futex) \ : "r" (id), "m" (futex), \ - "0" (LLL_MUTEX_LOCK_INITIALIZER) \ + "0" (LLL_LOCK_INITIALIZER) \ : "memory"); \ ret; }) -#define lll_mutex_cond_trylock(futex) \ +#define lll_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) \ + : "r" (LLL_LOCK_INITIALIZER_WAITERS), \ + "m" (futex), "0" (LLL_LOCK_INITIALIZER) \ : "memory"); \ ret; }) +#if defined NOT_IN_libc || defined UP +# define __lll_lock_asm_start LOCK_INSTR "cmpxchgl %1, %2\n\t" +#else +# define __lll_lock_asm_start "cmpl $0, %%gs:%P6\n\t" \ + "je 0f\n\t" \ + "lock\n" \ + "0:\tcmpxchgl %1, %2\n\t" +#endif -#define lll_mutex_lock(futex) \ - (void) ({ int ignore1, ignore2; \ - __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \ - "jnz _L_mutex_lock_%=\n\t" \ - ".subsection 1\n\t" \ - ".type _L_mutex_lock_%=,@function\n" \ - "_L_mutex_lock_%=:\n" \ - "1:\tleal %2, %%ecx\n" \ - "2:\tcall __lll_mutex_lock_wait\n" \ - "3:\tjmp 18f\n" \ - "4:\t.size _L_mutex_lock_%=, 4b-1b\n\t" \ - ".previous\n" \ - LLL_STUB_UNWIND_INFO_3 \ - "18:" \ - : "=a" (ignore1), "=c" (ignore2), "=m" (futex) \ - : "0" (0), "1" (1), "m" (futex) \ - : "memory"); }) - - -#define lll_robust_mutex_lock(futex, id) \ - ({ int result, ignore; \ +#define lll_lock(futex, private) \ + (void) \ + ({ int ignore1, ignore2; \ + if (__builtin_constant_p (private) && (private) == LLL_PRIVATE) \ + __asm __volatile (__lll_lock_asm_start \ + "jnz _L_lock_%=\n\t" \ + ".subsection 1\n\t" \ + ".type _L_lock_%=,@function\n" \ + "_L_lock_%=:\n" \ + "1:\tleal %2, %%ecx\n" \ + "2:\tcall __lll_lock_wait_private\n" \ + "3:\tjmp 18f\n" \ + "4:\t.size _L_lock_%=, 4b-1b\n\t" \ + ".previous\n" \ + LLL_STUB_UNWIND_INFO_3 \ + "18:" \ + : "=a" (ignore1), "=c" (ignore2), "=m" (futex) \ + : "0" (0), "1" (1), "m" (futex), \ + "i" (MULTIPLE_THREADS_OFFSET) \ + : "memory"); \ + else \ + { \ + int ignore3; \ + __asm __volatile (__lll_lock_asm_start \ + "jnz _L_lock_%=\n\t" \ + ".subsection 1\n\t" \ + ".type _L_lock_%=,@function\n" \ + "_L_lock_%=:\n" \ + "1:\tleal %2, %%edx\n" \ + "0:\tmovl %8, %%ecx\n" \ + "2:\tcall __lll_lock_wait\n" \ + "3:\tjmp 18f\n" \ + "4:\t.size _L_lock_%=, 4b-1b\n\t" \ + ".previous\n" \ + LLL_STUB_UNWIND_INFO_4 \ + "18:" \ + : "=a" (ignore1), "=c" (ignore2), \ + "=m" (futex), "=&d" (ignore3) \ + : "1" (1), "m" (futex), \ + "i" (MULTIPLE_THREADS_OFFSET), "0" (0), \ + "g" (private) \ + : "memory"); \ + } \ + }) + +#define lll_robust_lock(futex, id, private) \ + ({ int result, ignore1, ignore2; \ __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \ - "jnz _L_robust_mutex_lock_%=\n\t" \ + "jnz _L_robust_lock_%=\n\t" \ ".subsection 1\n\t" \ - ".type _L_robust_mutex_lock_%=,@function\n" \ - "_L_robust_mutex_lock_%=:\n" \ - "1:\tleal %2, %%ecx\n" \ - "2:\tcall __lll_robust_mutex_lock_wait\n" \ + ".type _L_robust_lock_%=,@function\n" \ + "_L_robust_lock_%=:\n" \ + "1:\tleal %2, %%edx\n" \ + "0:\tmovl %7, %%ecx\n" \ + "2:\tcall __lll_robust_lock_wait\n" \ "3:\tjmp 18f\n" \ - "4:\t.size _L_robust_mutex_lock_%=, 4b-1b\n\t" \ + "4:\t.size _L_robust_lock_%=, 4b-1b\n\t" \ ".previous\n" \ - LLL_STUB_UNWIND_INFO_3 \ + LLL_STUB_UNWIND_INFO_4 \ "18:" \ - : "=a" (result), "=c" (ignore), "=m" (futex) \ - : "0" (0), "1" (id), "m" (futex) \ + : "=a" (result), "=c" (ignore1), "=m" (futex), \ + "=&d" (ignore2) \ + : "0" (0), "1" (id), "m" (futex), "g" (private) \ : "memory"); \ result; }) -/* Special version of lll_mutex_lock which causes the unlock function to +/* Special version of lll_lock which causes the unlock function to always wakeup waiters. */ -#define lll_mutex_cond_lock(futex) \ - (void) ({ int ignore1, ignore2; \ - __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \ - "jnz _L_mutex_cond_lock_%=\n\t" \ - ".subsection 1\n\t" \ - ".type _L_mutex_cond_lock_%=,@function\n" \ - "_L_mutex_cond_lock_%=:\n" \ - "1:\tleal %2, %%ecx\n" \ - "2:\tcall __lll_mutex_lock_wait\n" \ - "3:\tjmp 18f\n" \ - "4:\t.size _L_mutex_cond_lock_%=, 4b-1b\n\t" \ - ".previous\n" \ - LLL_STUB_UNWIND_INFO_3 \ - "18:" \ - : "=a" (ignore1), "=c" (ignore2), "=m" (futex) \ - : "0" (0), "1" (2), "m" (futex) \ - : "memory"); }) - - -#define lll_robust_mutex_cond_lock(futex, id) \ - ({ int result, ignore; \ +#define lll_cond_lock(futex, private) \ + (void) \ + ({ int ignore1, ignore2, ignore3; \ + __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \ + "jnz _L_cond_lock_%=\n\t" \ + ".subsection 1\n\t" \ + ".type _L_cond_lock_%=,@function\n" \ + "_L_cond_lock_%=:\n" \ + "1:\tleal %2, %%edx\n" \ + "0:\tmovl %7, %%ecx\n" \ + "2:\tcall __lll_lock_wait\n" \ + "3:\tjmp 18f\n" \ + "4:\t.size _L_cond_lock_%=, 4b-1b\n\t" \ + ".previous\n" \ + LLL_STUB_UNWIND_INFO_4 \ + "18:" \ + : "=a" (ignore1), "=c" (ignore2), "=m" (futex), \ + "=&d" (ignore3) \ + : "0" (0), "1" (2), "m" (futex), "g" (private) \ + : "memory"); \ + }) + + +#define lll_robust_cond_lock(futex, id, private) \ + ({ int result, ignore1, ignore2; \ __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \ - "jnz _L_robust_mutex_cond_lock_%=\n\t" \ + "jnz _L_robust_cond_lock_%=\n\t" \ ".subsection 1\n\t" \ - ".type _L_robust_mutex_cond_lock_%=,@function\n" \ - "_L_robust_mutex_cond_lock_%=:\n" \ - "1:\tleal %2, %%ecx\n" \ - "2:\tcall __lll_robust_mutex_lock_wait\n" \ + ".type _L_robust_cond_lock_%=,@function\n" \ + "_L_robust_cond_lock_%=:\n" \ + "1:\tleal %2, %%edx\n" \ + "0:\tmovl %7, %%ecx\n" \ + "2:\tcall __lll_robust_lock_wait\n" \ "3:\tjmp 18f\n" \ - "4:\t.size _L_robust_mutex_cond_lock_%=, 4b-1b\n\t" \ + "4:\t.size _L_robust_cond_lock_%=, 4b-1b\n\t" \ ".previous\n" \ - LLL_STUB_UNWIND_INFO_3 \ + LLL_STUB_UNWIND_INFO_4 \ "18:" \ - : "=a" (result), "=c" (ignore), "=m" (futex) \ - : "0" (0), "1" (id | FUTEX_WAITERS), "m" (futex) \ + : "=a" (result), "=c" (ignore1), "=m" (futex), \ + "=&d" (ignore2) \ + : "0" (0), "1" (id | FUTEX_WAITERS), "m" (futex), \ + "g" (private) \ : "memory"); \ result; }) -#define lll_mutex_timedlock(futex, timeout) \ - ({ int result, ignore1, ignore2; \ +#define lll_timedlock(futex, timeout, private) \ + ({ int result, ignore1, ignore2, ignore3; \ __asm __volatile (LOCK_INSTR "cmpxchgl %1, %3\n\t" \ - "jnz _L_mutex_timedlock_%=\n\t" \ + "jnz _L_timedlock_%=\n\t" \ ".subsection 1\n\t" \ - ".type _L_mutex_timedlock_%=,@function\n" \ - "_L_mutex_timedlock_%=:\n" \ + ".type _L_timedlock_%=,@function\n" \ + "_L_timedlock_%=:\n" \ "1:\tleal %3, %%ecx\n" \ - "0:\tmovl %7, %%edx\n" \ - "2:\tcall __lll_mutex_timedlock_wait\n" \ + "0:\tmovl %8, %%edx\n" \ + "2:\tcall __lll_timedlock_wait\n" \ "3:\tjmp 18f\n" \ - "4:\t.size _L_mutex_timedlock_%=, 4b-1b\n\t" \ + "4:\t.size _L_timedlock_%=, 4b-1b\n\t" \ ".previous\n" \ LLL_STUB_UNWIND_INFO_4 \ "18:" \ : "=a" (result), "=c" (ignore1), "=&d" (ignore2), \ - "=m" (futex) \ - : "0" (0), "1" (1), "m" (futex), "m" (timeout) \ + "=m" (futex), "=S" (ignore3) \ + : "0" (0), "1" (1), "m" (futex), "m" (timeout), \ + "4" (private) \ : "memory"); \ result; }) -#define lll_robust_mutex_timedlock(futex, timeout, id) \ - ({ int result, ignore1, ignore2; \ +#define lll_robust_timedlock(futex, timeout, id, private) \ + ({ int result, ignore1, ignore2, ignore3; \ __asm __volatile (LOCK_INSTR "cmpxchgl %1, %3\n\t" \ - "jnz _L_robust_mutex_timedlock_%=\n\t" \ + "jnz _L_robust_timedlock_%=\n\t" \ ".subsection 1\n\t" \ - ".type _L_robust_mutex_timedlock_%=,@function\n" \ - "_L_robust_mutex_timedlock_%=:\n" \ + ".type _L_robust_timedlock_%=,@function\n" \ + "_L_robust_timedlock_%=:\n" \ "1:\tleal %3, %%ecx\n" \ - "0:\tmovl %7, %%edx\n" \ - "2:\tcall __lll_robust_mutex_timedlock_wait\n" \ + "0:\tmovl %8, %%edx\n" \ + "2:\tcall __lll_robust_timedlock_wait\n" \ "3:\tjmp 18f\n" \ - "4:\t.size _L_robust_mutex_timedlock_%=, 4b-1b\n\t" \ + "4:\t.size _L_robust_timedlock_%=, 4b-1b\n\t" \ ".previous\n" \ LLL_STUB_UNWIND_INFO_4 \ "18:" \ : "=a" (result), "=c" (ignore1), "=&d" (ignore2), \ - "=m" (futex) \ - : "0" (0), "1" (id), "m" (futex), "m" (timeout) \ + "=m" (futex), "=S" (ignore3) \ + : "0" (0), "1" (id), "m" (futex), "m" (timeout), \ + "4" (private) \ : "memory"); \ result; }) - -#define lll_mutex_unlock(futex) \ - (void) ({ int ignore; \ - __asm __volatile (LOCK_INSTR "subl $1, %0\n\t" \ - "jne _L_mutex_unlock_%=\n\t" \ - ".subsection 1\n\t" \ - ".type _L_mutex_unlock_%=,@function\n" \ - "_L_mutex_unlock_%=:\n" \ - "1:\tleal %0, %%eax\n" \ - "2:\tcall __lll_mutex_unlock_wake\n" \ - "3:\tjmp 18f\n" \ - "4:\t.size _L_mutex_unlock_%=, 4b-1b\n\t" \ - ".previous\n" \ - LLL_STUB_UNWIND_INFO_3 \ - "18:" \ - : "=m" (futex), "=&a" (ignore) \ - : "m" (futex) \ - : "memory"); }) - - -#define lll_robust_mutex_unlock(futex) \ - (void) ({ int ignore; \ - __asm __volatile (LOCK_INSTR "andl %2, %0\n\t" \ - "jne _L_robust_mutex_unlock_%=\n\t" \ - ".subsection 1\n\t" \ - ".type _L_robust_mutex_unlock_%=,@function\n" \ - "_L_robust_mutex_unlock_%=:\n\t" \ - "1:\tleal %0, %%eax\n" \ - "2:\tcall __lll_mutex_unlock_wake\n" \ - "3:\tjmp 18f\n" \ - "4:\t.size _L_robust_mutex_unlock_%=, 4b-1b\n\t"\ - ".previous\n" \ - LLL_STUB_UNWIND_INFO_3 \ - "18:" \ - : "=m" (futex), "=&a" (ignore) \ - : "i" (FUTEX_WAITERS), "m" (futex) \ - : "memory"); }) - - -#define lll_robust_mutex_dead(futex) \ - (void) ({ int __ignore; \ - register int _nr asm ("edx") = 1; \ - __asm __volatile (LOCK_INSTR "orl %5, (%2)\n\t" \ - LLL_EBX_LOAD \ - LLL_ENTER_KERNEL \ - LLL_EBX_LOAD \ - : "=a" (__ignore) \ - : "0" (SYS_futex), LLL_EBX_REG (&(futex)), \ - "c" (FUTEX_WAKE), "d" (_nr), \ - "i" (FUTEX_OWNER_DIED), \ - "i" (offsetof (tcbhead_t, sysinfo))); }) - - -#define lll_mutex_islocked(futex) \ - (futex != 0) - - -/* We have a separate internal lock implementation which is not tied - to binary compatibility. */ - -/* Type for lock object. */ -typedef int lll_lock_t; - -/* Initializers for lock. */ -#define LLL_LOCK_INITIALIZER (0) -#define LLL_LOCK_INITIALIZER_LOCKED (1) - - -extern int __lll_lock_wait (int val, int *__futex) - __attribute ((regparm (2))) attribute_hidden; -extern int __lll_unlock_wake (int *__futex) - __attribute ((regparm (1))) attribute_hidden; - - -/* The states of a lock are: - 0 - untaken - 1 - taken by one user - 2 - taken by more users */ - - #if defined NOT_IN_libc || defined UP -# define lll_trylock(futex) lll_mutex_trylock (futex) -# define lll_lock(futex) lll_mutex_lock (futex) -# define lll_unlock(futex) lll_mutex_unlock (futex) +# define __lll_unlock_asm LOCK_INSTR "subl $1, %0\n\t" #else -/* Special versions of the macros for use in libc itself. They avoid - the lock prefix when the thread library is not used. - - XXX In future we might even want to avoid it on UP machines. */ -# include <tls.h> - -# define lll_trylock(futex) \ - ({ unsigned char ret; \ - __asm __volatile ("cmpl $0, %%gs:%P5\n\t" \ - "je 0f\n\t" \ - "lock\n" \ - "0:\tcmpxchgl %2, %1; setne %0" \ - : "=a" (ret), "=m" (futex) \ - : "r" (LLL_MUTEX_LOCK_INITIALIZER_LOCKED), "m" (futex),\ - "0" (LLL_MUTEX_LOCK_INITIALIZER), \ - "i" (offsetof (tcbhead_t, multiple_threads)) \ - : "memory"); \ - ret; }) - - -# define lll_lock(futex) \ - (void) ({ int ignore1, ignore2; \ - __asm __volatile ("cmpl $0, %%gs:%P6\n\t" \ - "je 0f\n\t" \ - "lock\n" \ - "0:\tcmpxchgl %1, %2\n\t" \ - "jnz _L_lock_%=\n\t" \ - ".subsection 1\n\t" \ - ".type _L_lock_%=,@function\n" \ - "_L_lock_%=:\n" \ - "1:\tleal %2, %%ecx\n" \ - "2:\tcall __lll_mutex_lock_wait\n" \ - "3:\tjmp 18f\n" \ - "4:\t.size _L_lock_%=, 4b-1b\n\t" \ - ".previous\n" \ - LLL_STUB_UNWIND_INFO_3 \ - "18:" \ - : "=a" (ignore1), "=c" (ignore2), "=m" (futex) \ - : "0" (0), "1" (1), "m" (futex), \ - "i" (offsetof (tcbhead_t, multiple_threads)) \ - : "memory"); }) - - -# define lll_unlock(futex) \ - (void) ({ int ignore; \ - __asm __volatile ("cmpl $0, %%gs:%P3\n\t" \ - "je 0f\n\t" \ - "lock\n" \ - "0:\tsubl $1,%0\n\t" \ - "jne _L_unlock_%=\n\t" \ - ".subsection 1\n\t" \ - ".type _L_unlock_%=,@function\n" \ - "_L_unlock_%=:\n" \ - "1:\tleal %0, %%eax\n" \ - "2:\tcall __lll_mutex_unlock_wake\n" \ - "3:\tjmp 18f\n\t" \ - "4:\t.size _L_unlock_%=, 4b-1b\n\t" \ - ".previous\n" \ - LLL_STUB_UNWIND_INFO_3 \ - "18:" \ - : "=m" (futex), "=&a" (ignore) \ - : "m" (futex), \ - "i" (offsetof (tcbhead_t, multiple_threads)) \ - : "memory"); }) +# define __lll_unlock_asm "cmpl $0, %%gs:%P3\n\t" \ + "je 0f\n\t" \ + "lock\n" \ + "0:\tsubl $1,%0\n\t" #endif +#define lll_unlock(futex, private) \ + (void) \ + ({ int ignore; \ + if (__builtin_constant_p (private) && (private) == LLL_PRIVATE) \ + __asm __volatile (__lll_unlock_asm \ + "jne _L_unlock_%=\n\t" \ + ".subsection 1\n\t" \ + ".type _L_unlock_%=,@function\n" \ + "_L_unlock_%=:\n" \ + "1:\tleal %0, %%eax\n" \ + "2:\tcall __lll_unlock_wake_private\n" \ + "3:\tjmp 18f\n" \ + "4:\t.size _L_unlock_%=, 4b-1b\n\t" \ + ".previous\n" \ + LLL_STUB_UNWIND_INFO_3 \ + "18:" \ + : "=m" (futex), "=&a" (ignore) \ + : "m" (futex), "i" (MULTIPLE_THREADS_OFFSET) \ + : "memory"); \ + else \ + { \ + int ignore2; \ + __asm __volatile (__lll_unlock_asm \ + "jne _L_unlock_%=\n\t" \ + ".subsection 1\n\t" \ + ".type _L_unlock_%=,@function\n" \ + "_L_unlock_%=:\n" \ + "1:\tleal %0, %%eax\n" \ + "0:\tmovl %5, %%ecx\n" \ + "2:\tcall __lll_unlock_wake\n" \ + "3:\tjmp 18f\n" \ + "4:\t.size _L_unlock_%=, 4b-1b\n\t" \ + ".previous\n" \ + LLL_STUB_UNWIND_INFO_4 \ + "18:" \ + : "=m" (futex), "=&a" (ignore), "=&c" (ignore2) \ + : "i" (MULTIPLE_THREADS_OFFSET), "m" (futex), \ + "g" (private) \ + : "memory"); \ + } \ + }) + +#define lll_robust_unlock(futex, private) \ + (void) \ + ({ int ignore, ignore2; \ + __asm __volatile (LOCK_INSTR "andl %3, %0\n\t" \ + "jne _L_robust_unlock_%=\n\t" \ + ".subsection 1\n\t" \ + ".type _L_robust_unlock_%=,@function\n" \ + "_L_robust_unlock_%=:\n\t" \ + "1:\tleal %0, %%eax\n" \ + "0:\tmovl %5, %%ecx\n" \ + "2:\tcall __lll_unlock_wake\n" \ + "3:\tjmp 18f\n" \ + "4:\t.size _L_robust_unlock_%=, 4b-1b\n\t" \ + ".previous\n" \ + LLL_STUB_UNWIND_INFO_4 \ + "18:" \ + : "=m" (futex), "=&a" (ignore), "=&c" (ignore2) \ + : "i" (FUTEX_WAITERS), "m" (futex), "g" (private) \ + : "memory"); \ + }) + + +#define lll_robust_dead(futex, private) \ + (void) \ + ({ int __ignore; \ + register int _nr asm ("edx") = 1; \ + __asm __volatile (LOCK_INSTR "orl %5, (%2)\n\t" \ + LLL_EBX_LOAD \ + LLL_ENTER_KERNEL \ + LLL_EBX_LOAD \ + : "=a" (__ignore) \ + : "0" (SYS_futex), LLL_EBX_REG (&(futex)), \ + "c" (__lll_private_flag (FUTEX_WAKE, private)), \ + "d" (_nr), "i" (FUTEX_OWNER_DIED), \ + "i" (offsetof (tcbhead_t, sysinfo))); \ + }) #define lll_islocked(futex) \ (futex != LLL_LOCK_INITIALIZER) - /* The kernel notifies a process with uses CLONE_CLEARTID via futex wakeup when the clone terminates. The memory location contains the thread ID while the clone is running and is reset to zero @@ -581,28 +572,6 @@ extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime) } \ __result; }) - -/* Conditional variable handling. */ - -extern void __lll_cond_wait (pthread_cond_t *cond) - __attribute ((regparm (1))) attribute_hidden; -extern int __lll_cond_timedwait (pthread_cond_t *cond, - const struct timespec *abstime) - __attribute ((regparm (2))) attribute_hidden; -extern void __lll_cond_wake (pthread_cond_t *cond) - __attribute ((regparm (1))) attribute_hidden; -extern void __lll_cond_broadcast (pthread_cond_t *cond) - __attribute ((regparm (1))) attribute_hidden; - - -#define lll_cond_wait(cond) \ - __lll_cond_wait (cond) -#define lll_cond_timedwait(cond, abstime) \ - __lll_cond_timedwait (cond, abstime) -#define lll_cond_wake(cond) \ - __lll_cond_wake (cond) -#define lll_cond_broadcast(cond) \ - __lll_cond_broadcast (cond) - +#endif /* !__ASSEMBLER__ */ #endif /* lowlevellock.h */ |