e5106342c6
_foo - wrapped system call foo - weak definition to _foo and for cancellation points: _foo - wrapped system call __foo - enter cancellation point, call _foo(), leave cancellation point foo - weak definition to __foo Change use of global _thread_run to call a function to get the currently running thread. Make all pthread_foo functions weak definitions to _pthread_foo, where _pthread_foo is the implementation. This allows an application to provide its own pthread functions. Provide slightly different versions of pthread_mutex_lock and pthread_mutex_init so that we can tell the difference between a libc mutex and an application mutex. Threads holding mutexes internal to libc should never be allowed to exit, call signal handlers, or cancel. Approved by: -arch
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/*-
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* Copyright (c) 2000 Jonathan Lemon <jlemon@flugsvamp.com>
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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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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <unistd.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/event.h>
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#include <pthread.h>
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#include "pthread_private.h"
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#pragma weak keven=_kevent
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int
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_kevent(int kq, const struct kevent *changelist, int nchanges,
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struct kevent *eventlist, int nevents, const struct timespec *timeout)
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{
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struct pthread *curthread = _get_curthread();
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struct timespec nullts = { 0, 0 };
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int rc;
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/* Set the wake up time */
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_thread_kern_set_timeout(timeout);
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rc = __sys_kevent(kq, changelist, nchanges,
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eventlist, nevents, &nullts);
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if (rc == 0 && (timeout == NULL ||
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timeout->tv_sec != 0 || timeout->tv_nsec != 0)) {
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/* Save the socket file descriptor: */
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curthread->data.fd.fd = kq;
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curthread->data.fd.fname = __FILE__;
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curthread->data.fd.branch = __LINE__;
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do {
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/* Reset the interrupted and timeout flags: */
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curthread->interrupted = 0;
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curthread->timeout = 0;
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_thread_kern_sched_state(PS_FDR_WAIT,
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__FILE__, __LINE__);
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if (curthread->interrupted) {
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errno = EINTR;
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rc = -1;
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break;
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}
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rc = __sys_kevent(kq, NULL, 0,
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eventlist, nevents, &nullts);
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} while (rc == 0 && curthread->timeout == 0);
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}
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return (rc);
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}
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