mirror of https://github.com/NekoX-Dev/NekoX.git
100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
// Copyright (c) 2012, Google Inc.
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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 are
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// met:
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//
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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
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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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 FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This contains Pthread-related functions not provided by the Android NDK
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// but required by the Breakpad unit test. The functions are inlined here
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// in a C++ anonymous namespace in order to keep the build files simples.
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#ifndef GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_PTHREAD_FIXES_H
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#define GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_PTHREAD_FIXES_H
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#include <pthread.h>
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namespace {
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// Android doesn't provide pthread_barrier_t for now.
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#ifndef PTHREAD_BARRIER_SERIAL_THREAD
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// Anything except 0 will do here.
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#define PTHREAD_BARRIER_SERIAL_THREAD 0x12345
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typedef struct {
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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unsigned count;
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} pthread_barrier_t;
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int pthread_barrier_init(pthread_barrier_t* barrier,
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const void* /* barrier_attr */,
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unsigned count) {
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barrier->count = count;
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pthread_mutex_init(&barrier->mutex, NULL);
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pthread_cond_init(&barrier->cond, NULL);
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return 0;
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}
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int pthread_barrier_wait(pthread_barrier_t* barrier) {
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// Lock the mutex
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pthread_mutex_lock(&barrier->mutex);
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// Decrement the count. If this is the first thread to reach 0, wake up
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// waiters, unlock the mutex, then return PTHREAD_BARRIER_SERIAL_THREAD.
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if (--barrier->count == 0) {
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// First thread to reach the barrier
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pthread_cond_broadcast(&barrier->cond);
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pthread_mutex_unlock(&barrier->mutex);
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return PTHREAD_BARRIER_SERIAL_THREAD;
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}
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// Otherwise, wait for other threads until the count reaches 0, then
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// return 0 to indicate this is not the first thread.
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do {
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pthread_cond_wait(&barrier->cond, &barrier->mutex);
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} while (barrier->count > 0);
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pthread_mutex_unlock(&barrier->mutex);
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return 0;
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}
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int pthread_barrier_destroy(pthread_barrier_t *barrier) {
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barrier->count = 0;
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pthread_cond_destroy(&barrier->cond);
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pthread_mutex_destroy(&barrier->mutex);
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return 0;
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}
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#endif // defined(PTHREAD_BARRIER_SERIAL_THREAD)
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int pthread_yield(void) {
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sched_yield();
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return 0;
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}
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} // namespace
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#endif // GOOGLE_BREAKPAD_COMMON_ANDROID_TESTING_PTHREAD_FIXES_H
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