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/*
* Copyright (c) 2014 Samsung Electronics Co., Ltd All Rights Reserved
*
* 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.
*/
/*
* @file naive_synchronization_object.cpp
* @author Przemyslaw Dobrowolski (p.dobrowolsk@samsung.com)
* @version 1.0
* @brief This file is the implementation file of SQL naive
* synchronization object
*/
#include <stddef.h>
#include <dpl/db/naive_synchronization_object.h>
#include <dpl/assert.h>
#include <time.h>
namespace {
unsigned int seed = time(NULL);
}
//Taken from Thread class, so we don't have to pull whole definition
//(only this part is needed)
namespace Thread {
static const size_t NANOSECONDS_PER_SECOND =
static_cast<uint64_t>(1000 * 1000 * 1000);
static const size_t NANOSECONDS_PER_MILISECOND =
static_cast<uint64_t>(1000 * 1000);
void NanoSleep(uint64_t nanoseconds)
{
timespec requestedTime = {
static_cast<time_t>(
nanoseconds / NANOSECONDS_PER_SECOND),
static_cast<long>(
nanoseconds % NANOSECONDS_PER_SECOND)
};
timespec remainingTime;
for (;;) {
if (nanosleep(&requestedTime, &remainingTime) == 0)
break;
int error = errno;
Assert(error == EINTR);
requestedTime = remainingTime;
}
}
void MiliSleep(uint64_t miliseconds)
{
NanoSleep(miliseconds * NANOSECONDS_PER_MILISECOND);
}
}
namespace CKM {
namespace DB {
void NaiveSynchronizationObject::Synchronize()
{
// Sleep for about 10ms - 30ms
Thread::MiliSleep(10 + rand_r(&seed) % 20);
}
void NaiveSynchronizationObject::NotifyAll()
{
// No need to inform about anything
}
} // namespace DB
} // namespace CKM
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