/*
|
* xcam_mutex.h - Lock
|
*
|
* Copyright (c) 2014 Intel 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.
|
*
|
* Author: Wind Yuan <feng.yuan@intel.com>
|
*/
|
|
#ifndef XCAM_MUTEX_H
|
#define XCAM_MUTEX_H
|
|
#include <xcam_std.h>
|
#include <pthread.h>
|
#include <sys/time.h>
|
|
namespace XCam {
|
|
class Mutex {
|
friend class Cond;
|
private:
|
XCAM_DEAD_COPY (Mutex);
|
|
public:
|
Mutex () {
|
int error_num = pthread_mutex_init (&_mutex, NULL);
|
if (error_num != 0) {
|
XCAM_LOG_WARNING ("Mutex init failed %d: %s", error_num, strerror(error_num));
|
}
|
}
|
virtual ~Mutex () {
|
int error_num = pthread_mutex_destroy (&_mutex);
|
if (error_num != 0) {
|
XCAM_LOG_WARNING ("Mutex destroy failed %d: %s", error_num, strerror(error_num));
|
}
|
}
|
|
void lock() {
|
int error_num = pthread_mutex_lock (&_mutex);
|
if (error_num != 0) {
|
XCAM_LOG_WARNING ("Mutex lock failed %d: %s", error_num, strerror(error_num));
|
}
|
}
|
void unlock() {
|
int error_num = pthread_mutex_unlock (&_mutex);
|
if (error_num != 0) {
|
XCAM_LOG_WARNING ("Mutex unlock failed %d: %s", error_num, strerror(error_num));
|
}
|
}
|
|
private:
|
pthread_mutex_t _mutex;
|
};
|
|
class Cond {
|
private:
|
XCAM_DEAD_COPY (Cond);
|
|
public:
|
Cond () {
|
pthread_cond_init (&_cond, NULL);
|
}
|
~Cond () {
|
pthread_cond_destroy (&_cond);
|
}
|
|
int wait (Mutex &mutex) {
|
return pthread_cond_wait (&_cond, &mutex._mutex);
|
}
|
int timedwait (Mutex &mutex, uint32_t time_in_us) {
|
struct timeval now;
|
struct timespec abstime;
|
|
gettimeofday (&now, NULL);
|
now.tv_usec += time_in_us;
|
xcam_mem_clear (abstime);
|
abstime.tv_sec += now.tv_sec + now.tv_usec / 1000000;
|
abstime.tv_nsec = (now.tv_usec % 1000000) * 1000;
|
|
return pthread_cond_timedwait (&_cond, &mutex._mutex, &abstime);
|
}
|
|
int signal() {
|
return pthread_cond_signal (&_cond);
|
}
|
int broadcast() {
|
return pthread_cond_broadcast (&_cond);
|
}
|
private:
|
pthread_cond_t _cond;
|
};
|
|
class SmartLock {
|
private:
|
XCAM_DEAD_COPY (SmartLock);
|
|
public:
|
SmartLock (XCam::Mutex &mutex): _mutex(mutex) {
|
_mutex.lock();
|
}
|
virtual ~SmartLock () {
|
_mutex.unlock();
|
}
|
private:
|
XCam::Mutex &_mutex;
|
};
|
};
|
#endif //XCAM_MUTEX_H
|
