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/*
* Phusion Passenger - http://www.modrails.com/
* Copyright (c) 2009 Phusion
*
* "Phusion Passenger" is a trademark of Hongli Lai & Ninh Bui.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef _PASSENGER_SYSTEM_TIME_H_
#define _PASSENGER_SYSTEM_TIME_H_
#include <boost/thread.hpp>
#include <oxt/system_calls.hpp>
#include "Exceptions.h"
namespace Passenger {
using namespace oxt;
namespace SystemTimeData {
extern bool hasForcedValue;
extern time_t forcedValue;
}
/**
* This class allows one to obtain the system time, similar to time(). Unlike
* time(), it is possible to force a certain time to be returned, which is
* useful for testing code that depends on the system time.
*/
class SystemTime {
public:
/**
* Returns the time since the Epoch, measured in seconds. Or, if a time
* was forced, then the forced time is returned instead.
*
* @throws TimeRetrievalException Something went wrong while retrieving the time.
* @throws boost::thread_interrupted
*/
static time_t get() {
if (SystemTimeData::hasForcedValue) {
return SystemTimeData::forcedValue;
} else {
time_t ret = syscalls::time(NULL);
if (ret == -1) {
throw TimeRetrievalException(
"Unable to retrieve the system time",
errno);
}
return ret;
}
}
/**
* Force get() to return the given value.
*/
static void force(time_t value) {
SystemTimeData::hasForcedValue = true;
SystemTimeData::forcedValue = value;
}
/**
* Release the previously forced value, so that get()
* returns the system time once again.
*/
static void release() {
SystemTimeData::hasForcedValue = false;
}
};
} // namespace Passenger
#endif /* _PASSENGER_SYSTEM_TIME_H_ */
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