mirror of
git://git.musl-libc.org/musl
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a603a75a72
this attribute was applied to pthread_self and the functions providing
the locations for errno and h_errno as an optimization; however, it is
subtly incorrect. as specified, it means the return value will always
be the same, which is not true; it varies per-thread.
this attribute also implies that the function does not depend on any
state, and that calls to it can safely be reordered across any other
code. however such reordering is unsafe for these functions: they
break when reordered before initialization of the thread pointer. such
breakage was actually observed when compiled by libfirm/cparser.
to some extent the reordering problem could be solved with strong
compiler barriers between the stages of early startup code, but the
specified meaning of of attribute((const)) is sufficiently strong that
a compiler would theoretically be justified inserting gratuitous calls
to attribute((const)) const functions at random locations (e.g. to
save the value in static storage for later use).
this reverts commit cbf35978a9.
223 lines
8.4 KiB
C
223 lines
8.4 KiB
C
#ifndef _PTHREAD_H
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#define _PTHREAD_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <features.h>
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#define __NEED_time_t
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#define __NEED_clockid_t
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#define __NEED_struct_timespec
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#define __NEED_sigset_t
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#define __NEED_pthread_t
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#define __NEED_pthread_attr_t
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#define __NEED_pthread_mutexattr_t
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#define __NEED_pthread_condattr_t
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#define __NEED_pthread_rwlockattr_t
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#define __NEED_pthread_barrierattr_t
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#define __NEED_pthread_mutex_t
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#define __NEED_pthread_cond_t
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#define __NEED_pthread_rwlock_t
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#define __NEED_pthread_barrier_t
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#define __NEED_pthread_spinlock_t
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#define __NEED_pthread_key_t
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#define __NEED_pthread_once_t
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#define __NEED_size_t
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#include <bits/alltypes.h>
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#include <sched.h>
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#include <time.h>
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#define PTHREAD_CREATE_JOINABLE 0
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#define PTHREAD_CREATE_DETACHED 1
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#define PTHREAD_MUTEX_NORMAL 0
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#define PTHREAD_MUTEX_DEFAULT 0
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#define PTHREAD_MUTEX_RECURSIVE 1
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#define PTHREAD_MUTEX_ERRORCHECK 2
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#define PTHREAD_MUTEX_STALLED 0
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#define PTHREAD_MUTEX_ROBUST 1
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#define PTHREAD_PRIO_NONE 0
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#define PTHREAD_PRIO_INHERIT 1
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#define PTHREAD_PRIO_PROTECT 2
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#define PTHREAD_INHERIT_SCHED 0
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#define PTHREAD_EXPLICIT_SCHED 1
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#define PTHREAD_SCOPE_SYSTEM 0
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#define PTHREAD_SCOPE_PROCESS 1
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#define PTHREAD_PROCESS_PRIVATE 0
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#define PTHREAD_PROCESS_SHARED 1
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#define PTHREAD_MUTEX_INITIALIZER {{{0}}}
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#define PTHREAD_RWLOCK_INITIALIZER {{{0}}}
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#define PTHREAD_COND_INITIALIZER {{{0}}}
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#define PTHREAD_ONCE_INIT 0
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#define PTHREAD_CANCEL_ENABLE 0
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#define PTHREAD_CANCEL_DISABLE 1
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#define PTHREAD_CANCEL_MASKED 2
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#define PTHREAD_CANCEL_DEFERRED 0
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#define PTHREAD_CANCEL_ASYNCHRONOUS 1
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#define PTHREAD_CANCELED ((void *)-1)
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#define PTHREAD_BARRIER_SERIAL_THREAD (-1)
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int pthread_create(pthread_t *__restrict, const pthread_attr_t *__restrict, void *(*)(void *), void *__restrict);
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int pthread_detach(pthread_t);
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_Noreturn void pthread_exit(void *);
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int pthread_join(pthread_t, void **);
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pthread_t pthread_self(void);
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int pthread_equal(pthread_t, pthread_t);
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#ifndef __cplusplus
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#define pthread_equal(x,y) ((x)==(y))
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#endif
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int pthread_setcancelstate(int, int *);
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int pthread_setcanceltype(int, int *);
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void pthread_testcancel(void);
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int pthread_cancel(pthread_t);
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int pthread_getschedparam(pthread_t, int *__restrict, struct sched_param *__restrict);
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int pthread_setschedparam(pthread_t, int, const struct sched_param *);
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int pthread_setschedprio(pthread_t, int);
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int pthread_once(pthread_once_t *, void (*)(void));
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int pthread_mutex_init(pthread_mutex_t *__restrict, const pthread_mutexattr_t *__restrict);
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int pthread_mutex_lock(pthread_mutex_t *);
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int pthread_mutex_unlock(pthread_mutex_t *);
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int pthread_mutex_trylock(pthread_mutex_t *);
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int pthread_mutex_timedlock(pthread_mutex_t *__restrict, const struct timespec *__restrict);
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int pthread_mutex_destroy(pthread_mutex_t *);
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int pthread_mutex_consistent(pthread_mutex_t *);
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int pthread_mutex_getprioceiling(const pthread_mutex_t *__restrict, int *__restrict);
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int pthread_mutex_setprioceiling(pthread_mutex_t *__restrict, int, int *__restrict);
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int pthread_cond_init(pthread_cond_t *__restrict, const pthread_condattr_t *__restrict);
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int pthread_cond_destroy(pthread_cond_t *);
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int pthread_cond_wait(pthread_cond_t *__restrict, pthread_mutex_t *__restrict);
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int pthread_cond_timedwait(pthread_cond_t *__restrict, pthread_mutex_t *__restrict, const struct timespec *__restrict);
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int pthread_cond_broadcast(pthread_cond_t *);
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int pthread_cond_signal(pthread_cond_t *);
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int pthread_rwlock_init(pthread_rwlock_t *__restrict, const pthread_rwlockattr_t *__restrict);
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int pthread_rwlock_destroy(pthread_rwlock_t *);
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int pthread_rwlock_rdlock(pthread_rwlock_t *);
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int pthread_rwlock_tryrdlock(pthread_rwlock_t *);
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int pthread_rwlock_timedrdlock(pthread_rwlock_t *__restrict, const struct timespec *__restrict);
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int pthread_rwlock_wrlock(pthread_rwlock_t *);
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int pthread_rwlock_trywrlock(pthread_rwlock_t *);
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int pthread_rwlock_timedwrlock(pthread_rwlock_t *__restrict, const struct timespec *__restrict);
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int pthread_rwlock_unlock(pthread_rwlock_t *);
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int pthread_spin_init(pthread_spinlock_t *, int);
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int pthread_spin_destroy(pthread_spinlock_t *);
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int pthread_spin_lock(pthread_spinlock_t *);
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int pthread_spin_trylock(pthread_spinlock_t *);
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int pthread_spin_unlock(pthread_spinlock_t *);
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int pthread_barrier_init(pthread_barrier_t *__restrict, const pthread_barrierattr_t *__restrict, unsigned);
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int pthread_barrier_destroy(pthread_barrier_t *);
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int pthread_barrier_wait(pthread_barrier_t *);
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int pthread_key_create(pthread_key_t *, void (*)(void *));
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int pthread_key_delete(pthread_key_t);
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void *pthread_getspecific(pthread_key_t);
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int pthread_setspecific(pthread_key_t, const void *);
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int pthread_attr_init(pthread_attr_t *);
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int pthread_attr_destroy(pthread_attr_t *);
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int pthread_attr_getguardsize(const pthread_attr_t *__restrict, size_t *__restrict);
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int pthread_attr_setguardsize(pthread_attr_t *, size_t);
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int pthread_attr_getstacksize(const pthread_attr_t *__restrict, size_t *__restrict);
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int pthread_attr_setstacksize(pthread_attr_t *, size_t);
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int pthread_attr_getdetachstate(const pthread_attr_t *, int *);
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int pthread_attr_setdetachstate(pthread_attr_t *, int);
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int pthread_attr_getstack(const pthread_attr_t *__restrict, void **__restrict, size_t *__restrict);
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int pthread_attr_setstack(pthread_attr_t *, void *, size_t);
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int pthread_attr_getscope(const pthread_attr_t *__restrict, int *__restrict);
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int pthread_attr_setscope(pthread_attr_t *, int);
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int pthread_attr_getschedpolicy(const pthread_attr_t *__restrict, int *__restrict);
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int pthread_attr_setschedpolicy(pthread_attr_t *, int);
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int pthread_attr_getschedparam(const pthread_attr_t *__restrict, struct sched_param *__restrict);
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int pthread_attr_setschedparam(pthread_attr_t *__restrict, const struct sched_param *__restrict);
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int pthread_attr_getinheritsched(const pthread_attr_t *__restrict, int *__restrict);
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int pthread_attr_setinheritsched(pthread_attr_t *, int);
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int pthread_mutexattr_destroy(pthread_mutexattr_t *);
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int pthread_mutexattr_getprioceiling(const pthread_mutexattr_t *__restrict, int *__restrict);
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int pthread_mutexattr_getprotocol(const pthread_mutexattr_t *__restrict, int *__restrict);
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int pthread_mutexattr_getpshared(const pthread_mutexattr_t *__restrict, int *__restrict);
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int pthread_mutexattr_getrobust(const pthread_mutexattr_t *__restrict, int *__restrict);
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int pthread_mutexattr_gettype(const pthread_mutexattr_t *__restrict, int *__restrict);
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int pthread_mutexattr_init(pthread_mutexattr_t *);
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int pthread_mutexattr_setprioceiling(pthread_mutexattr_t *, int);
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int pthread_mutexattr_setprotocol(pthread_mutexattr_t *, int);
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int pthread_mutexattr_setpshared(pthread_mutexattr_t *, int);
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int pthread_mutexattr_setrobust(pthread_mutexattr_t *, int);
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int pthread_mutexattr_settype(pthread_mutexattr_t *, int);
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int pthread_condattr_init(pthread_condattr_t *);
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int pthread_condattr_destroy(pthread_condattr_t *);
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int pthread_condattr_setclock(pthread_condattr_t *, clockid_t);
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int pthread_condattr_setpshared(pthread_condattr_t *, int);
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int pthread_condattr_getclock(const pthread_condattr_t *__restrict, clockid_t *__restrict);
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int pthread_condattr_getpshared(const pthread_condattr_t *__restrict, int *__restrict);
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int pthread_rwlockattr_init(pthread_rwlockattr_t *);
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int pthread_rwlockattr_destroy(pthread_rwlockattr_t *);
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int pthread_rwlockattr_setpshared(pthread_rwlockattr_t *, int);
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int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *__restrict, int *__restrict);
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int pthread_barrierattr_destroy(pthread_barrierattr_t *);
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int pthread_barrierattr_getpshared(const pthread_barrierattr_t *__restrict, int *__restrict);
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int pthread_barrierattr_init(pthread_barrierattr_t *);
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int pthread_barrierattr_setpshared(pthread_barrierattr_t *, int);
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int pthread_atfork(void (*)(void), void (*)(void), void (*)(void));
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int pthread_getconcurrency(void);
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int pthread_setconcurrency(int);
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int pthread_getcpuclockid(pthread_t, clockid_t *);
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struct __ptcb {
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void (*__f)(void *);
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void *__x;
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struct __ptcb *__next;
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};
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void _pthread_cleanup_push(struct __ptcb *, void (*)(void *), void *);
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void _pthread_cleanup_pop(struct __ptcb *, int);
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#define pthread_cleanup_push(f, x) do { struct __ptcb __cb; _pthread_cleanup_push(&__cb, f, x);
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#define pthread_cleanup_pop(r) _pthread_cleanup_pop(&__cb, (r)); } while(0)
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#ifdef _GNU_SOURCE
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struct cpu_set_t;
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int pthread_getaffinity_np(pthread_t, size_t, struct cpu_set_t *);
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int pthread_setaffinity_np(pthread_t, size_t, const struct cpu_set_t *);
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int pthread_getattr_np(pthread_t, pthread_attr_t *);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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