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faf8c066df
Without this fix, the rwlock can fail to execute the explicit hand-over in certain cases (e.g., empty critical sections that switch quickly between read and write phases). This can then lead to errors in how __wrphase_futex is accessed, which in turn can lead to deadlocks.
88 lines
3.8 KiB
C
88 lines
3.8 KiB
C
/* Support functionality for using threads.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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, see
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<http://www.gnu.org/licenses/>. */
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#ifndef SUPPORT_THREAD_H
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#define SUPPORT_THREAD_H
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#include <pthread.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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/* Terminate the process (with exit status 0) after SECONDS have
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elapsed, from a helper thread. The process is terminated with the
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exit function, so atexit handlers are executed. */
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void delayed_exit (int seconds);
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/* Terminate the process (with exit status 1) if VALUE is not zero.
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In that case, print a failure message to standard output mentioning
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FUNCTION. The process is terminated with the exit function, so
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atexit handlers are executed. */
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void xpthread_check_return (const char *function, int value);
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/* The following functions call the corresponding libpthread functions
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and terminate the process on error. */
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void xpthread_barrier_init (pthread_barrier_t *barrier,
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pthread_barrierattr_t *attr, unsigned int count);
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void xpthread_barrier_destroy (pthread_barrier_t *barrier);
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void xpthread_mutexattr_destroy (pthread_mutexattr_t *);
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void xpthread_mutexattr_init (pthread_mutexattr_t *);
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void xpthread_mutexattr_setprotocol (pthread_mutexattr_t *, int);
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void xpthread_mutexattr_setpshared (pthread_mutexattr_t *, int);
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void xpthread_mutexattr_setrobust (pthread_mutexattr_t *, int);
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void xpthread_mutexattr_settype (pthread_mutexattr_t *, int);
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void xpthread_mutex_init (pthread_mutex_t *, const pthread_mutexattr_t *);
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void xpthread_mutex_destroy (pthread_mutex_t *);
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void xpthread_mutex_lock (pthread_mutex_t *mutex);
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void xpthread_mutex_unlock (pthread_mutex_t *mutex);
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void xpthread_mutex_consistent (pthread_mutex_t *);
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void xpthread_spin_lock (pthread_spinlock_t *lock);
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void xpthread_spin_unlock (pthread_spinlock_t *lock);
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void xpthread_cond_wait (pthread_cond_t * cond, pthread_mutex_t * mutex);
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pthread_t xpthread_create (pthread_attr_t *attr,
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void *(*thread_func) (void *), void *closure);
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void xpthread_detach (pthread_t thr);
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void xpthread_cancel (pthread_t thr);
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void *xpthread_join (pthread_t thr);
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void xpthread_once (pthread_once_t *guard, void (*func) (void));
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void xpthread_attr_destroy (pthread_attr_t *attr);
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void xpthread_attr_init (pthread_attr_t *attr);
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void xpthread_attr_setdetachstate (pthread_attr_t *attr,
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int detachstate);
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void xpthread_attr_setstacksize (pthread_attr_t *attr,
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size_t stacksize);
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void xpthread_attr_setguardsize (pthread_attr_t *attr,
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size_t guardsize);
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/* This function returns non-zero if pthread_barrier_wait returned
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PTHREAD_BARRIER_SERIAL_THREAD. */
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int xpthread_barrier_wait (pthread_barrier_t *barrier);
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void xpthread_rwlock_init (pthread_rwlock_t *rwlock,
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const pthread_rwlockattr_t *attr);
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void xpthread_rwlockattr_init (pthread_rwlockattr_t *attr);
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void xpthread_rwlockattr_setkind_np (pthread_rwlockattr_t *attr, int pref);
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void xpthread_rwlock_wrlock (pthread_rwlock_t *rwlock);
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void xpthread_rwlock_rdlock (pthread_rwlock_t *rwlock);
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void xpthread_rwlock_unlock (pthread_rwlock_t *rwlock);
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__END_DECLS
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#endif /* SUPPORT_THREAD_H */
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