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Diffstat (limited to 'libpthread/linuxthreads.old/join.c')
-rw-r--r--libpthread/linuxthreads.old/join.c369
1 files changed, 0 insertions, 369 deletions
diff --git a/libpthread/linuxthreads.old/join.c b/libpthread/linuxthreads.old/join.c
deleted file mode 100644
index c7e547951..000000000
--- a/libpthread/linuxthreads.old/join.c
+++ /dev/null
@@ -1,369 +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 <features.h>
-#include <errno.h>
-#include <sched.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include "pthread.h"
-#include "internals.h"
-#include "spinlock.h"
-#include "restart.h"
-#include "debug.h" /* PDEBUG, added by StS */
-
-libpthread_hidden_proto(pthread_exit)
-void pthread_exit(void * retval)
-{
- __pthread_do_exit (retval, CURRENT_STACK_FRAME);
-}
-libpthread_hidden_def (pthread_exit)
-
-void __pthread_do_exit(void *retval, char *currentframe)
-{
- pthread_descr self = thread_self();
- pthread_descr joining;
- struct pthread_request request;
- PDEBUG("self=%p, pid=%d\n", self, self->p_pid);
-
- /* obey POSIX behavior and prevent cancellation functions from
- * being called more than once.
- * http://sourceware.org/ml/libc-ports/2006-10/msg00043.html
- */
- THREAD_SETMEM(self, p_cancelstate, PTHREAD_CANCEL_DISABLE);
- THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_DEFERRED);
-
- /* 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);
- PDEBUG("joining = %p, pid=%d\n", joining, joining ? joining->p_pid : 0);
- __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(__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);
- }
- /* Exit the process (but don't flush stdio streams, and don't run
- 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 attribute_unused)
-{
- 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;
- PDEBUG("\n");
-
- /* Set up extrication interface */
- extr.pu_object = handle;
- extr.pu_extricate_func = join_extricate_func;
-
- __pthread_lock(&handle->h_lock, self);
- if (invalid_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);
- }
-
- PDEBUG("before suspend\n");
- suspend(self);
- PDEBUG("after suspend\n");
- /* 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(__pthread_manager_request,
- (char *) &request, sizeof(request)));
- }
- return 0;
-}
-
-int pthread_tryjoin_np(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;
- int result = 0;
-
- /* Make sure the descriptor is valid. */
- __pthread_lock(&handle->h_lock, self);
- if (invalid_handle(handle, thread_id)) {
- result = ESRCH;
- goto err;
- }
- th = handle->h_descr;
- /* Is the thread joinable?. */
- if (th->p_detached || th->p_joining != NULL) {
- result = EINVAL;
- goto err;
- }
- if (th == self) {
- result = EDEADLK;
- goto err;
- }
- /* Return right away if the thread hasn't terminated yet. */
- if (! th->p_terminated) {
- result = EBUSY;
- goto err;
- }
-
- /* 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(__libc_write(__pthread_manager_request,
- (char *) &request, sizeof(request)));
- }
- return 0;
-
-err:
- __pthread_unlock(&handle->h_lock);
- return result;
-}
-
-int pthread_timedjoin_np(pthread_t thread_id, void ** thread_return,
- const struct timespec *abstime)
-{
- 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;
- int result = 0;
- PDEBUG("\n");
-
- /* Set up extrication interface */
- extr.pu_object = handle;
- extr.pu_extricate_func = join_extricate_func;
-
- __pthread_lock(&handle->h_lock, self);
- if (invalid_handle(handle, thread_id)) {
- result = ESRCH;
- goto err;
- }
- th = handle->h_descr;
- if (th == self) {
- result = EDEADLK;
- goto err;
- }
- /* If detached or already joined, error */
- if (th->p_detached || th->p_joining != NULL) {
- result = EINVAL;
- goto err;
- }
- /* 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);
- }
-
- PDEBUG("before suspend\n");
- result = (timedsuspend(self, abstime) == 0) ? ETIMEDOUT : 0;
- PDEBUG("after suspend\n");
- /* Deregister extrication interface */
- __pthread_set_own_extricate_if(self, 0);
-
- /* This is a cancellation point */
- if (result == 0
- && 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);
- }
-
- /* We might have timed out. */
- if (result == 0) {
- /* Get return value */
- if (thread_return != NULL) *thread_return = th->p_retval;
- }
- else
- th->p_joining = NULL;
-
- __pthread_unlock(&handle->h_lock);
-
- if (result == 0) {
- /* 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(__libc_write(__pthread_manager_request,
- (char *) &request, sizeof(request)));
- }
- }
- return result;
-
-err:
- __pthread_unlock(&handle->h_lock);
- return result;
-}
-
-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 (invalid_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(__pthread_manager_request,
- (char *) &request, sizeof(request)));
- }
- return 0;
-}
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