1edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project/* 2edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 3edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 4edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * you may not use this file except in compliance with the License. 6edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * You may obtain a copy of the License at 7edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 8edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * 10edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * See the License for the specific language governing permissions and 14edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project * limitations under the License. 15edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project */ 16edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 17edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#ifndef ANDROID_BARRIER_H 18edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#define ANDROID_BARRIER_H 19edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 20edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <stdint.h> 21edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <sys/types.h> 22edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#include <utils/threads.h> 23edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 24edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectnamespace android { 25edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 26edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectclass Barrier 27edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project{ 28edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectpublic: 29edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project inline Barrier() : state(CLOSED) { } 30edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project inline ~Barrier() { } 31edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void open() { 32edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Mutex::Autolock _l(lock); 33edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project state = OPENED; 34edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project cv.broadcast(); 35edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 36edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void close() { 37edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Mutex::Autolock _l(lock); 38edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project state = CLOSED; 39edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 40edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project void wait() const { 41edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project Mutex::Autolock _l(lock); 42edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project while (state == CLOSED) { 43edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project cv.wait(lock); 44edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 45edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project } 46edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Projectprivate: 47edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project enum { OPENED, CLOSED }; 48edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mutable Mutex lock; 49edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project mutable Condition cv; 50edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project volatile int state; 51edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; 52edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 53edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project}; // namespace android 54edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project 55edbf3b6af777b721cd2a1ef461947e51e88241e1The Android Open Source Project#endif // ANDROID_BARRIER_H 56