diff options
Diffstat (limited to 'lib/libc_r/uthread/uthread_exit.c')
| -rw-r--r-- | lib/libc_r/uthread/uthread_exit.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/lib/libc_r/uthread/uthread_exit.c b/lib/libc_r/uthread/uthread_exit.c deleted file mode 100644 index 87a9dcd..0000000 --- a/lib/libc_r/uthread/uthread_exit.c +++ /dev/null @@ -1,224 +0,0 @@ -/* - * Copyright (c) 1995-1998 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. 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 AUTHOR 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. - * - * $FreeBSD$ - */ -#include <errno.h> -#include <unistd.h> -#include <fcntl.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "namespace.h" -#include <pthread.h> -#include "un-namespace.h" -#include "pthread_private.h" - -__weak_reference(_pthread_exit, pthread_exit); - -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_SCHED_TIMER, &itimer, NULL); - - /* Close the pthread kernel pipe: */ - __sys_close(_thread_kern_pipe[0]); - __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_getflags(i) & O_NONBLOCK) == 0) { - /* Get the current flags: */ - flags = __sys_fcntl(i, F_GETFL, NULL); - /* Clear the nonblocking file descriptor flag: */ - __sys_fcntl(i, F_SETFL, flags & ~O_NONBLOCK); - } - } - - /* Call the _exit syscall: */ - __sys_exit(status); -} - -void -_thread_exit(char *fname, int lineno, char *string) -{ - char s[256]; - - /* Prepare an error message string: */ - snprintf(s, sizeof(s), - "Fatal error '%s' at line %d in file %s (errno = %d)\n", - string, lineno, fname, errno); - - /* Write the string to the standard error file descriptor: */ - __sys_write(2, s, strlen(s)); - - /* Force this process to exit: */ - /* XXX - Do we want abort to be conditional on _PTHREADS_INVARIANTS? */ -#if defined(_PTHREADS_INVARIANTS) - abort(); -#else - __sys_exit(1); -#endif -} - -/* - * Only called when a thread is cancelled. It may be more useful - * to call it from pthread_exit() if other ways of asynchronous or - * abnormal thread termination can be found. - */ -void -_thread_exit_cleanup(void) -{ - struct pthread *curthread = _get_curthread(); - - /* - * POSIX states that cancellation/termination of a thread should - * not release any visible resources (such as mutexes) and that - * it is the applications responsibility. Resources that are - * internal to the threads library, including file and fd locks, - * are not visible to the application and need to be released. - */ - /* Unlock all owned fd locks: */ - _thread_fd_unlock_owned(curthread); - - /* Unlock all private mutexes: */ - _mutex_unlock_private(curthread); - - /* - * This still isn't quite correct because we don't account - * for held spinlocks (see libc/stdlib/malloc.c). - */ -} - -void -_pthread_exit(void *status) -{ - struct pthread *curthread = _get_curthread(); - pthread_t pthread; - - /* Check if this thread is already in the process of exiting: */ - if ((curthread->flags & PTHREAD_EXITING) != 0) { - char msg[128]; - snprintf(msg, sizeof(msg), "Thread %p has called pthread_exit() from a destructor. POSIX 1003.1 1996 s16.2.5.2 does not allow this!",curthread); - PANIC(msg); - } - - /* Flag this thread as exiting: */ - curthread->flags |= PTHREAD_EXITING; - - /* Save the return value: */ - curthread->ret = status; - - while (curthread->cleanup != NULL) { - pthread_cleanup_pop(1); - } - if (curthread->attr.cleanup_attr != NULL) { - curthread->attr.cleanup_attr(curthread->attr.arg_attr); - } - /* Check if there is thread specific data: */ - if (curthread->specific != NULL) { - /* Run the thread-specific data destructors: */ - _thread_cleanupspecific(); - } - - /* Free thread-specific poll_data structure, if allocated: */ - if (curthread->poll_data.fds != NULL) { - free(curthread->poll_data.fds); - curthread->poll_data.fds = NULL; - } - - /* - * Lock the garbage collector mutex to ensure that the garbage - * collector is not using the dead thread list. - */ - if (_pthread_mutex_lock(&_gc_mutex) != 0) - PANIC("Cannot lock gc mutex"); - - /* Add this thread to the list of dead threads. */ - TAILQ_INSERT_HEAD(&_dead_list, curthread, dle); - - /* - * Signal the garbage collector thread that there is something - * to clean up. - */ - if (_pthread_cond_signal(&_gc_cond) != 0) - PANIC("Cannot signal gc cond"); - - /* - * Avoid a race condition where a scheduling signal can occur - * causing the garbage collector thread to run. If this happens, - * the current thread can be cleaned out from under us. - */ - _thread_kern_sig_defer(); - - /* Unlock the garbage collector mutex: */ - if (_pthread_mutex_unlock(&_gc_mutex) != 0) - PANIC("Cannot unlock gc mutex"); - - /* Check if there is a thread joining this one: */ - if (curthread->joiner != NULL) { - pthread = curthread->joiner; - curthread->joiner = NULL; - - /* Make the joining thread runnable: */ - PTHREAD_NEW_STATE(pthread, PS_RUNNING); - - /* Set the return value for the joining thread: */ - pthread->join_status.ret = curthread->ret; - pthread->join_status.error = 0; - pthread->join_status.thread = NULL; - - /* Make this thread collectable by the garbage collector. */ - PTHREAD_ASSERT(((curthread->attr.flags & PTHREAD_DETACHED) == - 0), "Cannot join a detached thread"); - curthread->attr.flags |= PTHREAD_DETACHED; - } - - /* Remove this thread from the thread list: */ - TAILQ_REMOVE(&_thread_list, curthread, tle); - - /* This thread will never be re-scheduled. */ - _thread_kern_sched_state(PS_DEAD, __FILE__, __LINE__); - - /* This point should not be reached. */ - PANIC("Dead thread has resumed"); -} |
