72 lines
1.6 KiB
C++
72 lines
1.6 KiB
C++
// Copyright (C) 2012 Alexandre Janniaux
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// This file is part of the "Nazara Engine - Core module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Core/Posix/SemaphoreImpl.hpp>
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#include <Nazara/Core/Config.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <limits>
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#include <Nazara/Core/Debug.hpp>
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#include <sys/time.h>
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NzSemaphoreImpl::NzSemaphoreImpl(unsigned int count)
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{
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if(sem_init(&m_semaphore, 0, count) != 0)
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NazaraError("Failed to create semaphore: " + NzGetLastSystemError());
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}
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NzSemaphoreImpl::~NzSemaphoreImpl()
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{
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sem_destroy(&m_semaphore);
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}
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unsigned int NzSemaphoreImpl::GetCount() const
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{
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int count=0;
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sem_getvalue(const_cast<sem_t*>(&m_semaphore), &count);
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return static_cast<unsigned int>(count);
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}
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void NzSemaphoreImpl::Post()
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{
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#if NAZARA_CORE_SAFE
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if (sem_post(&m_semaphore)==-1)
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NazaraError("Failed to release semaphore: " + NzGetLastSystemError());
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#else
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sem_post(&m_semaphore);
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#endif
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}
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void NzSemaphoreImpl::Wait()
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{
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#if NAZARA_CORE_SAFE
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if (sem_wait(&m_semaphore) == -1 )
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NazaraError("Failed to wait for semaphore: " + NzGetLastSystemError());
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#else
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sem_wait(&m_semaphore);
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#endif
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}
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bool NzSemaphoreImpl::Wait(nzUInt32 timeout)
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{
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timeval tv;
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gettimeofday(&tv, nullptr);
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timespec ti;
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ti.tv_nsec = (tv.tv_usec + (timeout % 1000)) * 1000000;
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ti.tv_sec = tv.tv_sec + (timeout / 1000) + (ti.tv_nsec / 1000000000);
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ti.tv_nsec %= 1000000000;
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#if NAZARA_CORE_SAFE
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if (sem_timedwait(&m_semaphore, &ti) != 0)
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{
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NazaraError("Failed to wait for semaphore: " + NzGetLastSystemError());
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return false;
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}
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return true;
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#else
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return sem_timedwait(&m_semaphore, &ti) != 0;
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#endif
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}
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