84d55c7fad
path, making them suitable for direct use by the dynamic loader. Register libpthread-specific locking API with rtld on startup. This still has some rough edges with signals which should be addresses later. Approved by: re (scottl)
138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/*
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* Copyright (c) 2001 Alexander Kabaev
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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#include <rtld_lock.h>
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#include "thr_private.h"
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static void *_thr_rtld_lock_create();
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static void _thr_rtld_lock_destroy(void *);
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static void _thr_rtld_rlock_acquire(void *);
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static void _thr_rtld_wlock_acquire(void *);
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static void _thr_rtld_lock_release(void *);
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static int _thr_rtld_set_flag(int);
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static int _thr_rtld_clr_flag(int);
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static void *
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_thr_rtld_lock_create()
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{
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pthread_rwlock_t prwlock;
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if (_pthread_rwlock_init(&prwlock, NULL))
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return (NULL);
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return (prwlock);
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}
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static void
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_thr_rtld_lock_destroy(void *lock)
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{
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pthread_rwlock_t prwlock = (pthread_rwlock_t)lock;
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if (prwlock != NULL)
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_pthread_rwlock_destroy(&prwlock);
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}
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static void
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_thr_rtld_rlock_acquire(void *lock)
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{
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pthread_rwlock_t prwlock = (pthread_rwlock_t)lock;
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_thr_rwlock_rdlock(&prwlock);
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}
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static void
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_thr_rtld_wlock_acquire(void *lock)
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{
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pthread_rwlock_t prwlock = (pthread_rwlock_t)lock;
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_thr_rwlock_wrlock(&prwlock);
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}
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static void
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_thr_rtld_lock_release(void *lock)
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{
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pthread_rwlock_t prwlock = (pthread_rwlock_t)lock;
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_thr_rwlock_unlock(&prwlock);
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}
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static int
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_thr_rtld_set_flag(int mask)
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{
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struct pthread *curthread;
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int bits;
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curthread = _get_curthread();
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if (curthread != NULL) {
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bits = curthread->rtld_bits;
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curthread->rtld_bits |= mask;
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} else {
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bits = 0;
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PANIC("No current thread in rtld call");
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}
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return (bits);
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}
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static int
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_thr_rtld_clr_flag(int mask)
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{
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struct pthread *curthread;
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int bits;
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curthread = _get_curthread();
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if (curthread != NULL) {
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bits = curthread->rtld_bits;
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curthread->rtld_bits &= ~mask;
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} else {
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bits = 0;
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PANIC("No current thread in rtld call");
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}
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return (bits);
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}
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void
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_thr_rtld_init()
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{
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struct RtldLockInfo li;
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li.lock_create = _thr_rtld_lock_create;
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li.lock_destroy = _thr_rtld_lock_destroy;
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li.rlock_acquire = _thr_rtld_rlock_acquire;
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li.wlock_acquire = _thr_rtld_wlock_acquire;
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li.lock_release = _thr_rtld_lock_release;
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li.thread_set_flag = _thr_rtld_set_flag;
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li.thread_clr_flag = _thr_rtld_clr_flag;
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li.at_fork = NULL;
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_rtld_thread_init(&li);
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}
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void
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_thr_rtld_fini()
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{
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_rtld_thread_init(NULL);
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}
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