76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
// Copyright (C) 2015 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/ThreadImpl.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <Nazara/Core/Functor.hpp>
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#include <unistd.h>
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#include <sys/time.h>
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#include <Nazara/Core/Debug.hpp>
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namespace Nz
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{
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ThreadImpl::ThreadImpl(Functor* functor)
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{
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int error = pthread_create(&m_handle, nullptr, &ThreadImpl::ThreadProc, functor);
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if (error != 0)
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NazaraInternalError("Failed to create thread: " + Error::GetLastSystemError());
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}
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void ThreadImpl::Detach()
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{
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pthread_detach(m_handle);
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}
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void ThreadImpl::Join()
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{
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pthread_join(m_handle, nullptr);
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}
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void* ThreadImpl::ThreadProc(void* userdata)
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{
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Functor* func = static_cast<Functor*>(userdata);
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func->Run();
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delete func;
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return nullptr;
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}
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void ThreadImpl::Sleep(UInt32 time)
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{
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// code from SFML2 Unix SleepImpl.cpp source https://github.com/LaurentGomila/SFML/blob/master/src/SFML/System/Unix/SleepImpl.cpp
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// usleep is not reliable enough (it might block the
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// whole process instead of just the current thread)
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// so we must use pthread_cond_timedwait instead
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// this implementation is inspired from Qt
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// get the current time
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timeval tv;
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gettimeofday(&tv, nullptr);
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// construct the time limit (current time + time to wait)
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timespec ti;
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ti.tv_nsec = (tv.tv_usec + (time % 1000)) * 1000;
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ti.tv_sec = tv.tv_sec + (time / 1000) + (ti.tv_nsec / 1000000000);
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ti.tv_nsec %= 1000000000;
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// create a mutex and thread condition
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pthread_mutex_t mutex;
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pthread_mutex_init(&mutex, nullptr);
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pthread_cond_t condition;
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pthread_cond_init(&condition, nullptr);
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// wait...
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pthread_mutex_lock(&mutex);
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pthread_cond_timedwait(&condition, &mutex, &ti);
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pthread_mutex_unlock(&mutex);
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// destroy the mutex and condition
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pthread_cond_destroy(&condition);
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pthread_mutex_destroy(&mutex);
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}
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}
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