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/*
* This file is part of the Omni C++ framework
*
* Copyright (c) 2016, Zeriph Enterprises, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of Zeriph, Zeriph Enterprises, LLC, nor the names
* of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ZERIPH AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ZERIPH AND CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if !defined(OMNI_SYNC_LOCK_HPP)
#define OMNI_SYNC_LOCK_HPP 1
#include <omni/types/lock_t.hpp>
#include <omni/chrono/tick.hpp>
namespace omni {
namespace sync {
inline void mutex_init(omni::sync::mutex_t& mtx)
{
#if defined(OMNI_OS_WIN)
::InitializeCriticalSection(&mtx);
#else
int lerr = 0;
pthread_mutexattr_t mtxatr;
if ((lerr = ::pthread_mutexattr_init(&mtxatr)) == 0) {
if ((lerr = ::pthread_mutexattr_settype(&mtxatr,
#if defined(__linux__) && !defined(PTHREAD_MUTEX_RECURSIVE)
PTHREAD_MUTEX_RECURSIVE_NP
#else
PTHREAD_MUTEX_RECURSIVE
#endif
)) == 0)
{
if ((lerr = ::pthread_mutex_init(&mtx, &mtxatr)) == 0) {
lerr = ::pthread_mutexattr_init.html">pthread_mutexattr_destroy(&mtxatr);
}
}
}
if (lerr != 0) {
OMNI_ERRV_FW("system create mutex failed", lerr, omni::mutex_system_exception("system create mutex failed", lerr))
}
#endif
}
inline void mutex_destroy(omni::sync::mutex_t& mtx)
{
#if defined(OMNI_OS_WIN)
::DeleteCriticalSection(&mtx);
#else
int lerr = ::pthread_mutex_init.html">pthread_mutex_destroy(&mtx);
if (lerr != 0) {
OMNI_ERRV_FW("mutex destroy failed", lerr, omni::mutex_system_exception("mutex destroy failed", lerr))
}
#endif
}
inline bool mutex_trylock(omni::sync::mutex_t& mtx)
{
#if defined(OMNI_OS_WIN)
return (::TryEnterCriticalSection(&mtx) == TRUE);
#else
return (::pthread_mutex_trylock(&mtx) == 0);
#endif
}
inline void mutex_lock(omni::sync::mutex_t& mtx)
{
#if defined(OMNI_OS_WIN)
::EnterCriticalSection(&mtx);
#else
int lerr = ::pthread_mutex_lock(&mtx);
if (lerr != 0) {
OMNI_ERRV_FW("mutex lock failed", lerr, omni::mutex_system_exception("mutex lock failed", lerr))
}
#endif
}
inline bool mutex_lock(omni::sync::mutex_t& mtx, std::size_t timeout_ms)
{
if (timeout_ms == 0) { return omni::sync::mutex_trylock(mtx); }
omni::chrono::tick_t start = omni::chrono::monotonic_tick();
while (omni::chrono::elapsed_ms(start) <= timeout_ms) {
if (omni::sync::mutex_trylock(mtx)) { return true; }
}
return false;
}
inline void mutex_unlock(omni::sync::mutex_t& mtx)
{
#if defined(OMNI_OS_WIN)
::LeaveCriticalSection(&mtx);
#else
int lerr = ::pthread_mutex_unlock(&mtx);
if (lerr != 0) {
OMNI_ERRV_FW("mutex unlock failed", lerr, omni::mutex_system_exception("mutex unlock failed", lerr))
}
#endif
}
}
}
#endif // OMNI_SYNC_LOCK_HPP