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/*
* Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by John Birrell.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
void _exit(int status)
{
int flags;
int i;
struct itimerval itimer;
/* Disable the interval timer: */
itimer.it_interval.tv_sec = 0;
itimer.it_interval.tv_usec = 0;
itimer.it_value.tv_sec = 0;
itimer.it_value.tv_usec = 0;
setitimer(ITIMER_VIRTUAL, &itimer, NULL);
/* Close the pthread kernel pipe: */
_thread_sys_close(_thread_kern_pipe[0]);
_thread_sys_close(_thread_kern_pipe[1]);
/*
* Enter a loop to set all file descriptors to blocking
* if they were not created as non-blocking:
*/
for (i = 0; i < _thread_dtablesize; i++) {
/* Check if this file descriptor is in use: */
if (_thread_fd_table[i] != NULL &&
!(_thread_fd_table[i]->flags & O_NONBLOCK)) {
/* Get the current flags: */
flags = _thread_sys_fcntl(i, F_GETFL, NULL);
/* Clear the nonblocking file descriptor flag: */
_thread_sys_fcntl(i, F_SETFL, flags & ~O_NONBLOCK);
}
}
/* Call the _exit syscall: */
_thread_sys__exit(status);
}
void
_thread_exit(char *fname, int lineno, char *string)
{
char s[256];
/* Prepare an error message string: */
strcpy(s, "Fatal error '");
strcat(s, string);
strcat(s, "' at line ? ");
strcat(s, "in file ");
strcat(s, fname);
strcat(s, " (errno = ?");
strcat(s, ")\n");
/* Write the string to the standard error file descriptor: */
_thread_sys_write(2, s, strlen(s));
/* Force this process to exit: */
_exit(1);
}
void
pthread_exit(void *status)
{
int sig;
long l;
pthread_t pthread;
/* Block signals: */
_thread_kern_sig_block(NULL);
/* Save the return value: */
_thread_run->ret = status;
while (_thread_run->cleanup != NULL) {
pthread_cleanup_pop(1);
}
if (_thread_run->attr.cleanup_attr != NULL) {
_thread_run->attr.cleanup_attr(_thread_run->attr.arg_attr);
}
/* Check if there is thread specific data: */
if (_thread_run->specific_data != NULL) {
/* Run the thread-specific data destructors: */
_thread_cleanupspecific();
}
/* Check if there are any threads joined to this one: */
while ((pthread = _thread_queue_deq(&(_thread_run->join_queue))) != NULL) {
/* Wake the joined thread and let it detach this thread: */
PTHREAD_NEW_STATE(pthread,PS_RUNNING);
}
/* Check if the running thread is at the head of the linked list: */
if (_thread_link_list == _thread_run) {
/* There is no previous thread: */
_thread_link_list = _thread_run->nxt;
} else {
/* Point to the first thread in the list: */
pthread = _thread_link_list;
/*
* Enter a loop to find the thread in the linked list before
* the running thread:
*/
while (pthread != NULL && pthread->nxt != _thread_run) {
/* Point to the next thread: */
pthread = pthread->nxt;
}
/* Check that a previous thread was found: */
if (pthread != NULL) {
/*
* Point the previous thread to the one after the
* running thread:
*/
pthread->nxt = _thread_run->nxt;
}
}
/* Check if this is a signal handler thread: */
if (_thread_run->parent_thread != NULL) {
/*
* Enter a loop to search for other threads with the same
* parent:
*/
for (pthread = _thread_link_list; pthread != NULL; pthread = pthread->nxt) {
/* Compare the parent thread pointers: */
if (pthread->parent_thread == _thread_run->parent_thread) {
/*
* The parent thread is waiting on at least
* one other signal handler. Exit the loop
* now that this is known.
*/
break;
}
}
/*
* Check if the parent is not waiting on any other signal
* handler threads and if it hasn't died in the meantime:
*/
if (pthread == NULL && _thread_run->parent_thread->state != PS_DEAD) {
/* Allow the parent thread to run again: */
PTHREAD_NEW_STATE(_thread_run->parent_thread,PS_RUNNING);
}
/* Get the signal number: */
l = (long) _thread_run->arg;
sig = (int) l;
/* Unblock the signal from the parent thread: */
sigdelset(&_thread_run->parent_thread->sigmask, sig);
}
/*
* This thread will never run again. Add it to the list of dead
* threads:
*/
_thread_run->nxt = _thread_dead;
_thread_dead = _thread_run;
/*
* The running thread is no longer in the thread link list so it will
* now die:
*/
_thread_kern_sched_state(PS_DEAD, __FILE__, __LINE__);
/* This point should not be reached. */
PANIC("Dead thread has resumed");
}
#endif
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