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e51deae7f6
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.
578 lines
20 KiB
C
578 lines
20 KiB
C
/* Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _LOWLEVELLOCK_H
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#define _LOWLEVELLOCK_H 1
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#ifndef __ASSEMBLER__
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# include <time.h>
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# include <sys/param.h>
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# include <bits/pthreadtypes.h>
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# include <kernel-features.h>
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# include <tcb-offsets.h>
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# ifndef LOCK_INSTR
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# ifdef UP
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# define LOCK_INSTR /* nothing */
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# else
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# define LOCK_INSTR "lock;"
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# endif
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# endif
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#else
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# ifndef LOCK
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# ifdef UP
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# define LOCK
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# else
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# define LOCK lock
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# endif
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# endif
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#endif
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#define SYS_futex 240
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#define FUTEX_WAIT 0
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#define FUTEX_WAKE 1
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#define FUTEX_CMP_REQUEUE 4
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#define FUTEX_WAKE_OP 5
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#define FUTEX_LOCK_PI 6
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#define FUTEX_UNLOCK_PI 7
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#define FUTEX_TRYLOCK_PI 8
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#define FUTEX_PRIVATE_FLAG 128
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#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
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/* Values for 'private' parameter of locking macros. Yes, the
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definition seems to be backwards. But it is not. The bit will be
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reversed before passing to the system call. */
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#define LLL_PRIVATE 0
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#define LLL_SHARED FUTEX_PRIVATE_FLAG
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#if !defined NOT_IN_libc || defined IS_IN_rtld
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/* In libc.so or ld.so all futexes are private. */
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# ifdef __ASSUME_PRIVATE_FUTEX
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# define __lll_private_flag(fl, private) \
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((fl) | FUTEX_PRIVATE_FLAG)
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# else
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# define __lll_private_flag(fl, private) \
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((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex))
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# endif
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#else
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# ifdef __ASSUME_PRIVATE_FUTEX
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# define __lll_private_flag(fl, private) \
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(((fl) | FUTEX_PRIVATE_FLAG) ^ (private))
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# else
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# define __lll_private_flag(fl, private) \
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(__builtin_constant_p (private) \
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? ((private) == 0 \
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? ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex)) \
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: (fl)) \
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: ({ unsigned int __fl = ((private) ^ FUTEX_PRIVATE_FLAG); \
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asm ("andl %%fs:%P1, %0" : "+r" (__fl) \
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: "i" (offsetof (struct pthread, header.private_futex))); \
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__fl | (fl); }))
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# endif
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#endif
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#ifndef __ASSEMBLER__
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/* Initializer for compatibility lock. */
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#define LLL_LOCK_INITIALIZER (0)
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#define LLL_LOCK_INITIALIZER_LOCKED (1)
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#define LLL_LOCK_INITIALIZER_WAITERS (2)
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#ifdef PIC
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# define LLL_EBX_LOAD "xchgl %2, %%ebx\n"
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# define LLL_EBX_REG "D"
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#else
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# define LLL_EBX_LOAD
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# define LLL_EBX_REG "b"
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#endif
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#ifdef I386_USE_SYSENTER
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# ifdef SHARED
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# define LLL_ENTER_KERNEL "call *%%gs:%P6\n\t"
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# else
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# define LLL_ENTER_KERNEL "call *_dl_sysinfo\n\t"
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# endif
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#else
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# define LLL_ENTER_KERNEL "int $0x80\n\t"
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#endif
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/* Delay in spinlock loop. */
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#define BUSY_WAIT_NOP asm ("rep; nop")
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#define LLL_STUB_UNWIND_INFO_START \
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".section .eh_frame,\"a\",@progbits\n" \
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"5:\t" ".long 7f-6f # Length of Common Information Entry\n" \
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"6:\t" ".long 0x0 # CIE Identifier Tag\n\t" \
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".byte 0x1 # CIE Version\n\t" \
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".ascii \"zR\\0\" # CIE Augmentation\n\t" \
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".uleb128 0x1 # CIE Code Alignment Factor\n\t" \
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".sleb128 -4 # CIE Data Alignment Factor\n\t" \
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".byte 0x8 # CIE RA Column\n\t" \
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".uleb128 0x1 # Augmentation size\n\t" \
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".byte 0x1b # FDE Encoding (pcrel sdata4)\n\t" \
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".byte 0xc # DW_CFA_def_cfa\n\t" \
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".uleb128 0x4\n\t" \
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".uleb128 0x0\n\t" \
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".align 4\n" \
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"7:\t" ".long 17f-8f # FDE Length\n" \
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"8:\t" ".long 8b-5b # FDE CIE offset\n\t" \
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".long 1b-. # FDE initial location\n\t" \
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".long 4b-1b # FDE address range\n\t" \
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".uleb128 0x0 # Augmentation size\n\t" \
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".byte 0x16 # DW_CFA_val_expression\n\t" \
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".uleb128 0x8\n\t" \
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".uleb128 10f-9f\n" \
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"9:\t" ".byte 0x78 # DW_OP_breg8\n\t" \
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".sleb128 3b-1b\n"
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#define LLL_STUB_UNWIND_INFO_END \
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".byte 0x16 # DW_CFA_val_expression\n\t" \
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".uleb128 0x8\n\t" \
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".uleb128 12f-11f\n" \
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"11:\t" ".byte 0x78 # DW_OP_breg8\n\t" \
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".sleb128 3b-2b\n" \
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"12:\t" ".byte 0x40 + (3b-2b-1) # DW_CFA_advance_loc\n\t" \
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".byte 0x16 # DW_CFA_val_expression\n\t" \
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".uleb128 0x8\n\t" \
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".uleb128 16f-13f\n" \
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"13:\t" ".byte 0x78 # DW_OP_breg8\n\t" \
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".sleb128 15f-14f\n\t" \
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".byte 0x0d # DW_OP_const4s\n" \
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"14:\t" ".4byte 3b-.\n\t" \
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".byte 0x1c # DW_OP_minus\n\t" \
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".byte 0x0d # DW_OP_const4s\n" \
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"15:\t" ".4byte 18f-.\n\t" \
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".byte 0x22 # DW_OP_plus\n" \
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"16:\t" ".align 4\n" \
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"17:\t" ".previous\n"
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/* Unwind info for
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1: lea ..., ...
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2: call ...
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3: jmp 18f
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4:
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snippet. */
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#define LLL_STUB_UNWIND_INFO_3 \
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LLL_STUB_UNWIND_INFO_START \
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"10:\t" ".byte 0x40 + (2b-1b) # DW_CFA_advance_loc\n\t" \
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LLL_STUB_UNWIND_INFO_END
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/* Unwind info for
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1: lea ..., ...
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0: movl ..., ...
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2: call ...
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3: jmp 18f
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4:
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snippet. */
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#define LLL_STUB_UNWIND_INFO_4 \
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LLL_STUB_UNWIND_INFO_START \
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"10:\t" ".byte 0x40 + (0b-1b) # DW_CFA_advance_loc\n\t" \
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".byte 0x16 # DW_CFA_val_expression\n\t" \
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".uleb128 0x8\n\t" \
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".uleb128 20f-19f\n" \
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"19:\t" ".byte 0x78 # DW_OP_breg8\n\t" \
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".sleb128 3b-0b\n" \
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"20:\t" ".byte 0x40 + (2b-0b) # DW_CFA_advance_loc\n\t" \
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LLL_STUB_UNWIND_INFO_END
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#define lll_futex_wait(futex, val, private) \
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lll_futex_timed_wait (futex, val, NULL, private)
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#define lll_futex_timed_wait(futex, val, timeout, private) \
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({ \
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int __status; \
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register __typeof (val) _val asm ("edx") = (val); \
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__asm __volatile (LLL_EBX_LOAD \
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LLL_ENTER_KERNEL \
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LLL_EBX_LOAD \
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: "=a" (__status) \
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: "0" (SYS_futex), LLL_EBX_REG (futex), "S" (timeout), \
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"c" (__lll_private_flag (FUTEX_WAIT, private)), \
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"d" (_val), "i" (offsetof (tcbhead_t, sysinfo)) \
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: "memory"); \
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__status; \
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})
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#define lll_futex_wake(futex, nr, private) \
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do { \
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int __ignore; \
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register __typeof (nr) _nr asm ("edx") = (nr); \
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__asm __volatile (LLL_EBX_LOAD \
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LLL_ENTER_KERNEL \
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LLL_EBX_LOAD \
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: "=a" (__ignore) \
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: "0" (SYS_futex), LLL_EBX_REG (futex), \
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"c" (__lll_private_flag (FUTEX_WAKE, private)), \
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"d" (_nr), \
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"i" (0) /* phony, to align next arg's number */, \
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"i" (offsetof (tcbhead_t, sysinfo))); \
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} while (0)
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/* NB: in the lll_trylock macro we simply return the value in %eax
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after the cmpxchg instruction. In case the operation succeded this
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value is zero. In case the operation failed, the cmpxchg instruction
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has loaded the current value of the memory work which is guaranteed
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to be nonzero. */
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#if defined NOT_IN_libc || defined UP
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# define __lll_trylock_asm LOCK_INSTR "cmpxchgl %2, %1"
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#else
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# define __lll_trylock_asm "cmpl $0, %%gs:%P5\n\t" \
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"je 0f\n\t" \
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"lock\n" \
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"0:\tcmpxchgl %2, %1"
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#endif
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#define lll_trylock(futex) \
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({ int ret; \
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__asm __volatile (__lll_trylock_asm \
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: "=a" (ret), "=m" (futex) \
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: "r" (LLL_LOCK_INITIALIZER_LOCKED), "m" (futex), \
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"0" (LLL_LOCK_INITIALIZER), \
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"i" (MULTIPLE_THREADS_OFFSET) \
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: "memory"); \
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ret; })
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#define lll_robust_trylock(futex, id) \
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({ int ret; \
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__asm __volatile (LOCK_INSTR "cmpxchgl %2, %1" \
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: "=a" (ret), "=m" (futex) \
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: "r" (id), "m" (futex), \
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"0" (LLL_LOCK_INITIALIZER) \
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: "memory"); \
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ret; })
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#define lll_cond_trylock(futex) \
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({ int ret; \
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__asm __volatile (LOCK_INSTR "cmpxchgl %2, %1" \
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: "=a" (ret), "=m" (futex) \
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: "r" (LLL_LOCK_INITIALIZER_WAITERS), \
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"m" (futex), "0" (LLL_LOCK_INITIALIZER) \
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: "memory"); \
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ret; })
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#if defined NOT_IN_libc || defined UP
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# define __lll_lock_asm_start LOCK_INSTR "cmpxchgl %1, %2\n\t"
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#else
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# define __lll_lock_asm_start "cmpl $0, %%gs:%P6\n\t" \
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"je 0f\n\t" \
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"lock\n" \
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"0:\tcmpxchgl %1, %2\n\t"
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#endif
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#define lll_lock(futex, private) \
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(void) \
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({ int ignore1, ignore2; \
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if (__builtin_constant_p (private) && (private) == LLL_PRIVATE) \
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__asm __volatile (__lll_lock_asm_start \
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"jnz _L_lock_%=\n\t" \
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".subsection 1\n\t" \
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".type _L_lock_%=,@function\n" \
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"_L_lock_%=:\n" \
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"1:\tleal %2, %%ecx\n" \
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"2:\tcall __lll_lock_wait_private\n" \
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"3:\tjmp 18f\n" \
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"4:\t.size _L_lock_%=, 4b-1b\n\t" \
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".previous\n" \
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LLL_STUB_UNWIND_INFO_3 \
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"18:" \
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: "=a" (ignore1), "=c" (ignore2), "=m" (futex) \
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: "0" (0), "1" (1), "m" (futex), \
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"i" (MULTIPLE_THREADS_OFFSET) \
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: "memory"); \
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else \
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{ \
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int ignore3; \
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__asm __volatile (__lll_lock_asm_start \
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"jnz _L_lock_%=\n\t" \
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".subsection 1\n\t" \
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".type _L_lock_%=,@function\n" \
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"_L_lock_%=:\n" \
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"1:\tleal %2, %%edx\n" \
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"0:\tmovl %8, %%ecx\n" \
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"2:\tcall __lll_lock_wait\n" \
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"3:\tjmp 18f\n" \
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"4:\t.size _L_lock_%=, 4b-1b\n\t" \
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".previous\n" \
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LLL_STUB_UNWIND_INFO_4 \
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"18:" \
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: "=a" (ignore1), "=c" (ignore2), \
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"=m" (futex), "=&d" (ignore3) \
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: "1" (1), "m" (futex), \
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"i" (MULTIPLE_THREADS_OFFSET), "0" (0), \
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"g" (private) \
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: "memory"); \
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} \
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})
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#define lll_robust_lock(futex, id, private) \
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({ int result, ignore1, ignore2; \
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__asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \
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"jnz _L_robust_lock_%=\n\t" \
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".subsection 1\n\t" \
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".type _L_robust_lock_%=,@function\n" \
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"_L_robust_lock_%=:\n" \
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"1:\tleal %2, %%edx\n" \
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"0:\tmovl %7, %%ecx\n" \
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"2:\tcall __lll_robust_lock_wait\n" \
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"3:\tjmp 18f\n" \
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"4:\t.size _L_robust_lock_%=, 4b-1b\n\t" \
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".previous\n" \
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LLL_STUB_UNWIND_INFO_4 \
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"18:" \
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: "=a" (result), "=c" (ignore1), "=m" (futex), \
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"=&d" (ignore2) \
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: "0" (0), "1" (id), "m" (futex), "g" (private) \
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: "memory"); \
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result; })
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|
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/* Special version of lll_lock which causes the unlock function to
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always wakeup waiters. */
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#define lll_cond_lock(futex, private) \
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(void) \
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({ int ignore1, ignore2, ignore3; \
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__asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t" \
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"jnz _L_cond_lock_%=\n\t" \
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".subsection 1\n\t" \
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".type _L_cond_lock_%=,@function\n" \
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"_L_cond_lock_%=:\n" \
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"1:\tleal %2, %%edx\n" \
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"0:\tmovl %7, %%ecx\n" \
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"2:\tcall __lll_lock_wait\n" \
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"3:\tjmp 18f\n" \
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"4:\t.size _L_cond_lock_%=, 4b-1b\n\t" \
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".previous\n" \
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LLL_STUB_UNWIND_INFO_4 \
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|
"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_cond_lock_%=\n\t" \
|
|
".subsection 1\n\t" \
|
|
".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_cond_lock_%=, 4b-1b\n\t" \
|
|
".previous\n" \
|
|
LLL_STUB_UNWIND_INFO_4 \
|
|
"18:" \
|
|
: "=a" (result), "=c" (ignore1), "=m" (futex), \
|
|
"=&d" (ignore2) \
|
|
: "0" (0), "1" (id | FUTEX_WAITERS), "m" (futex), \
|
|
"g" (private) \
|
|
: "memory"); \
|
|
result; })
|
|
|
|
|
|
#define lll_timedlock(futex, timeout, private) \
|
|
({ int result, ignore1, ignore2, ignore3; \
|
|
__asm __volatile (LOCK_INSTR "cmpxchgl %1, %3\n\t" \
|
|
"jnz _L_timedlock_%=\n\t" \
|
|
".subsection 1\n\t" \
|
|
".type _L_timedlock_%=,@function\n" \
|
|
"_L_timedlock_%=:\n" \
|
|
"1:\tleal %3, %%ecx\n" \
|
|
"0:\tmovl %8, %%edx\n" \
|
|
"2:\tcall __lll_timedlock_wait\n" \
|
|
"3:\tjmp 18f\n" \
|
|
"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), "=S" (ignore3) \
|
|
: "0" (0), "1" (1), "m" (futex), "m" (timeout), \
|
|
"4" (private) \
|
|
: "memory"); \
|
|
result; })
|
|
|
|
|
|
#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_timedlock_%=\n\t" \
|
|
".subsection 1\n\t" \
|
|
".type _L_robust_timedlock_%=,@function\n" \
|
|
"_L_robust_timedlock_%=:\n" \
|
|
"1:\tleal %3, %%ecx\n" \
|
|
"0:\tmovl %8, %%edx\n" \
|
|
"2:\tcall __lll_robust_timedlock_wait\n" \
|
|
"3:\tjmp 18f\n" \
|
|
"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), "=S" (ignore3) \
|
|
: "0" (0), "1" (id), "m" (futex), "m" (timeout), \
|
|
"4" (private) \
|
|
: "memory"); \
|
|
result; })
|
|
|
|
#if defined NOT_IN_libc || defined UP
|
|
# define __lll_unlock_asm LOCK_INSTR "subl $1, %0\n\t"
|
|
#else
|
|
# 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
|
|
afterwards.
|
|
|
|
The macro parameter must not have any side effect. */
|
|
#define lll_wait_tid(tid) \
|
|
do { \
|
|
int __ignore; \
|
|
register __typeof (tid) _tid asm ("edx") = (tid); \
|
|
if (_tid != 0) \
|
|
__asm __volatile (LLL_EBX_LOAD \
|
|
"1:\tmovl %1, %%eax\n\t" \
|
|
LLL_ENTER_KERNEL \
|
|
"cmpl $0, (%%ebx)\n\t" \
|
|
"jne 1b\n\t" \
|
|
LLL_EBX_LOAD \
|
|
: "=&a" (__ignore) \
|
|
: "i" (SYS_futex), LLL_EBX_REG (&tid), "S" (0), \
|
|
"c" (FUTEX_WAIT), "d" (_tid), \
|
|
"i" (offsetof (tcbhead_t, sysinfo)) \
|
|
: "memory"); \
|
|
} while (0)
|
|
|
|
extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime)
|
|
__attribute__ ((regparm (2))) attribute_hidden;
|
|
#define lll_timedwait_tid(tid, abstime) \
|
|
({ \
|
|
int __result = 0; \
|
|
if (tid != 0) \
|
|
{ \
|
|
if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) \
|
|
__result = EINVAL; \
|
|
else \
|
|
__result = __lll_timedwait_tid (&tid, abstime); \
|
|
} \
|
|
__result; })
|
|
|
|
#endif /* !__ASSEMBLER__ */
|
|
|
|
#endif /* lowlevellock.h */
|