8cf1b30567
Add name to mmaped regions. Add pthread benchmark code. Allocate pthread_internal_t on regular stack. Bug: 16847284 Change-Id: Id60835163bb0d68092241f1a118015b5a8f85069
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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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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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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#include <errno.h>
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#include "private/bionic_futex.h"
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#include "pthread_accessor.h"
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int pthread_join(pthread_t t, void** return_value) {
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if (t == pthread_self()) {
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return EDEADLK;
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}
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pid_t tid;
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volatile int* tid_ptr;
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{
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pthread_accessor thread(t);
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if (thread.get() == NULL) {
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return ESRCH;
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}
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if ((thread->attr.flags & PTHREAD_ATTR_FLAG_DETACHED) != 0) {
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return EINVAL;
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}
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if ((thread->attr.flags & PTHREAD_ATTR_FLAG_JOINED) != 0) {
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return EINVAL;
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}
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// Okay, looks like we can signal our intention to join.
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thread->attr.flags |= PTHREAD_ATTR_FLAG_JOINED;
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tid = thread->tid;
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tid_ptr = &thread->tid;
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}
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// We set the PTHREAD_ATTR_FLAG_JOINED flag with the lock held,
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// so no one is going to remove this thread except us.
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// Wait for the thread to actually exit, if it hasn't already.
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while (*tid_ptr != 0) {
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__futex_wait(tid_ptr, tid, NULL);
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}
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// Take the lock again so we can pull the thread's return value
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// and remove the thread from the list.
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pthread_accessor thread(t);
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if (return_value) {
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*return_value = thread->return_value;
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}
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_pthread_internal_remove_locked(thread.get(), true);
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return 0;
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}
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