include/amino/condition.h

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/*
 * (c) Copyright 2008, IBM Corporation.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *  Change History:
 *
 *  yy-mm-dd  Developer  Defect     Description
 *  --------  ---------  ------     -----------
 *  08-07-18  ganzhi     N/A        Initial version
 */
#ifndef AMINO_UTIL_CONDITION
#define AMINO_UTIL_CONDITION

#include <time.h>
#include <pthread.h>
#include <amino/mutex.h>
#include <amino/lock.h>

namespace amino{
    class condition_variable{
        private:
            pthread_cond_t fCond;
        public:
            typedef pthread_cond_t native_handle_type;

            condition_variable(){
                pthread_cond_init(&fCond, NULL);
            }

            ~condition_variable(){
                 pthread_cond_destroy(&fCond);
            }

            native_handle_type native_handle(){
                return fCond;
            }

            template<typename mutexT>
            void wait(unique_lock<mutexT>& lock){
                pthread_cond_wait(&fCond, lock.mutex()->native_handle());
            } 

            void notify_one(){
                pthread_cond_signal(&fCond);
            }

            void notify_all(){
                pthread_cond_broadcast(&fCond);
            }

            template<typename mutexT>
            bool timed_wait(unique_lock<mutexT>&lock, long milli){ 
                struct timespec timeout;
                clock_gettime(CLOCK_REALTIME, &timeout);
                timeout.tv_sec += milli/1000;
                timeout.tv_nsec += (milli%1000)*1000000;
                return 0==pthread_cond_timedwait(&fCond, 
                        lock.mutex()->native_handle(), &timeout);
            }
    };
}

#endif

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