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author | Roland McGrath <roland@gnu.org> | 2005-07-03 04:40:34 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 2005-07-03 04:40:34 +0000 |
commit | 88e3fbcb5d6829f8980d6bb356b1c0cd7a38187b (patch) | |
tree | 41b73f55c91439f87d82e5d32b9d8e46e82ce3c1 /linuxthreads/join.c | |
parent | d19b1b4f2ff49e085b55e8564b52ca17b028e335 (diff) | |
download | glibc-88e3fbcb5d6829f8980d6bb356b1c0cd7a38187b.tar.gz glibc-88e3fbcb5d6829f8980d6bb356b1c0cd7a38187b.tar.xz glibc-88e3fbcb5d6829f8980d6bb356b1c0cd7a38187b.zip |
linuxthreads, linuxthreads_db: Directories removed (preserved in ports repository).
Diffstat (limited to 'linuxthreads/join.c')
-rw-r--r-- | linuxthreads/join.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/linuxthreads/join.c b/linuxthreads/join.c deleted file mode 100644 index 148f222319..0000000000 --- a/linuxthreads/join.c +++ /dev/null @@ -1,220 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Thread termination and joining */ - -#include <errno.h> -#include <sched.h> -#include <stdlib.h> -#include <unistd.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" -#include <not-cancel.h> - -void __pthread_exit(void * retval) -{ - __pthread_do_exit (retval, CURRENT_STACK_FRAME); -} -strong_alias (__pthread_exit, pthread_exit); - -void __pthread_do_exit(void *retval, char *currentframe) -{ - pthread_descr self = thread_self(); - pthread_descr joining; - struct pthread_request request; - - /* Reset the cancellation flag to avoid looping if the cleanup handlers - contain cancellation points */ - THREAD_SETMEM(self, p_canceled, 0); - /* Call cleanup functions and destroy the thread-specific data */ - __pthread_perform_cleanup(currentframe); - __pthread_destroy_specifics(); - /* Store return value */ - __pthread_lock(THREAD_GETMEM(self, p_lock), self); - THREAD_SETMEM(self, p_retval, retval); - /* See whether we have to signal the death. */ - if (THREAD_GETMEM(self, p_report_events)) - { - /* See whether TD_DEATH is in any of the mask. */ - int idx = __td_eventword (TD_DEATH); - uint32_t mask = __td_eventmask (TD_DEATH); - - if ((mask & (__pthread_threads_events.event_bits[idx] - | THREAD_GETMEM_NC(self, - p_eventbuf.eventmask.event_bits[idx]))) - != 0) - { - /* Yep, we have to signal the death. */ - THREAD_SETMEM(self, p_eventbuf.eventnum, TD_DEATH); - THREAD_SETMEM(self, p_eventbuf.eventdata, self); - __pthread_last_event = self; - - /* Now call the function to signal the event. */ - __linuxthreads_death_event(); - } - } - /* Say that we've terminated */ - THREAD_SETMEM(self, p_terminated, 1); - /* See if someone is joining on us */ - joining = THREAD_GETMEM(self, p_joining); - __pthread_unlock(THREAD_GETMEM(self, p_lock)); - /* Restart joining thread if any */ - if (joining != NULL) restart(joining); - /* If this is the initial thread, block until all threads have terminated. - If another thread calls exit, we'll be terminated from our signal - handler. */ - if (self == __pthread_main_thread && __pthread_manager_request >= 0) { - request.req_thread = self; - request.req_kind = REQ_MAIN_THREAD_EXIT; - TEMP_FAILURE_RETRY(write_not_cancel(__pthread_manager_request, - (char *)&request, sizeof(request))); - suspend(self); - /* Main thread flushes stdio streams and runs atexit functions. - It also calls a handler within LinuxThreads which sends a process exit - request to the thread manager. */ - exit(0); - } - /* Threads other than the main one terminate without flushing stdio streams - or running atexit functions. */ - _exit(0); -} - -/* Function called by pthread_cancel to remove the thread from - waiting on a condition variable queue. */ - -static int join_extricate_func(void *obj, pthread_descr th) -{ - volatile pthread_descr self = thread_self(); - pthread_handle handle = obj; - pthread_descr jo; - int did_remove = 0; - - __pthread_lock(&handle->h_lock, self); - jo = handle->h_descr; - did_remove = jo->p_joining != NULL; - jo->p_joining = NULL; - __pthread_unlock(&handle->h_lock); - - return did_remove; -} - -int pthread_join(pthread_t thread_id, void ** thread_return) -{ - volatile pthread_descr self = thread_self(); - struct pthread_request request; - pthread_handle handle = thread_handle(thread_id); - pthread_descr th; - pthread_extricate_if extr; - int already_canceled = 0; - - /* Set up extrication interface */ - extr.pu_object = handle; - extr.pu_extricate_func = join_extricate_func; - - __pthread_lock(&handle->h_lock, self); - if (nonexisting_handle(handle, thread_id)) { - __pthread_unlock(&handle->h_lock); - return ESRCH; - } - th = handle->h_descr; - if (th == self) { - __pthread_unlock(&handle->h_lock); - return EDEADLK; - } - /* If detached or already joined, error */ - if (th->p_detached || th->p_joining != NULL) { - __pthread_unlock(&handle->h_lock); - return EINVAL; - } - /* If not terminated yet, suspend ourselves. */ - if (! th->p_terminated) { - /* Register extrication interface */ - __pthread_set_own_extricate_if(self, &extr); - if (!(THREAD_GETMEM(self, p_canceled) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)) - th->p_joining = self; - else - already_canceled = 1; - __pthread_unlock(&handle->h_lock); - - if (already_canceled) { - __pthread_set_own_extricate_if(self, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - - suspend(self); - /* Deregister extrication interface */ - __pthread_set_own_extricate_if(self, 0); - - /* This is a cancellation point */ - if (THREAD_GETMEM(self, p_woken_by_cancel) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) { - THREAD_SETMEM(self, p_woken_by_cancel, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - __pthread_lock(&handle->h_lock, self); - } - /* Get return value */ - if (thread_return != NULL) *thread_return = th->p_retval; - __pthread_unlock(&handle->h_lock); - /* Send notification to thread manager */ - if (__pthread_manager_request >= 0) { - request.req_thread = self; - request.req_kind = REQ_FREE; - request.req_args.free.thread_id = thread_id; - TEMP_FAILURE_RETRY(write_not_cancel(__pthread_manager_request, - (char *) &request, sizeof(request))); - } - return 0; -} - -int pthread_detach(pthread_t thread_id) -{ - int terminated; - struct pthread_request request; - pthread_handle handle = thread_handle(thread_id); - pthread_descr th; - - __pthread_lock(&handle->h_lock, NULL); - if (nonexisting_handle(handle, thread_id)) { - __pthread_unlock(&handle->h_lock); - return ESRCH; - } - th = handle->h_descr; - /* If already detached, error */ - if (th->p_detached) { - __pthread_unlock(&handle->h_lock); - return EINVAL; - } - /* If already joining, don't do anything. */ - if (th->p_joining != NULL) { - __pthread_unlock(&handle->h_lock); - return 0; - } - /* Mark as detached */ - th->p_detached = 1; - terminated = th->p_terminated; - __pthread_unlock(&handle->h_lock); - /* If already terminated, notify thread manager to reclaim resources */ - if (terminated && __pthread_manager_request >= 0) { - request.req_thread = thread_self(); - request.req_kind = REQ_FREE; - request.req_args.free.thread_id = thread_id; - TEMP_FAILURE_RETRY(write_not_cancel(__pthread_manager_request, - (char *) &request, sizeof(request))); - } - return 0; -} |