dolphin/Source/Core/Common/Src/Thread.cpp

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// Copyright (C) 2003-2008 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "Common.h"
#ifdef _WIN32
#include <windows.h>
#elif __GNUC__
#include <unistd.h>
#include <pthread.h>
#else
#error unsupported platform
#endif
#include "Thread.h"
#if defined(THREAD_VIDEO_WAKEUP_ONIDLE) && defined(_WIN32)
HANDLE g_hEventOnIdle=NULL;
#endif
namespace Common
{
#ifdef _WIN32
CriticalSection::CriticalSection(int spincount)
{
if (spincount)
{
InitializeCriticalSectionAndSpinCount(&section, spincount);
}
else
{
InitializeCriticalSection(&section);
}
}
CriticalSection::~CriticalSection()
{
DeleteCriticalSection(&section);
}
void CriticalSection::Enter()
{
EnterCriticalSection(&section);
}
bool CriticalSection::TryEnter()
{
return(TryEnterCriticalSection(&section) ? true : false);
}
void CriticalSection::Leave()
{
LeaveCriticalSection(&section);
}
Thread::Thread(ThreadFunc function, void* arg)
: m_hThread(NULL), m_threadId(0)
{
m_hThread = CreateThread(
0, // Security attributes
0, // Stack size
function,
arg,
0,
&m_threadId);
}
Thread::~Thread()
{
WaitForDeath();
}
void Thread::WaitForDeath()
{
if (m_hThread)
{
WaitForSingleObject(m_hThread, INFINITE);
CloseHandle(m_hThread);
m_hThread = NULL;
}
}
void Thread::SetAffinity(int mask)
{
SetThreadAffinityMask(m_hThread, mask);
}
void Thread::SetCurrentThreadAffinity(int mask)
{
SetThreadAffinityMask(GetCurrentThread(), mask);
}
Event::Event()
{
m_hEvent = 0;
}
void Event::Init()
{
m_hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
}
void Event::Shutdown()
{
CloseHandle(m_hEvent);
m_hEvent = 0;
}
void Event::Set()
{
SetEvent(m_hEvent);
}
void Event::Wait()
{
WaitForSingleObject(m_hEvent, INFINITE);
}
void SleepCurrentThread(int ms)
{
Sleep(ms);
}
typedef struct tagTHREADNAME_INFO
{
DWORD dwType; // must be 0x1000
LPCSTR szName; // pointer to name (in user addr space)
DWORD dwThreadID; // thread ID (-1=caller thread)
DWORD dwFlags; // reserved for future use, must be zero
} THREADNAME_INFO;
// Usage: SetThreadName (-1, "MainThread");
//
// Sets the debugger-visible name of the current thread.
// Uses undocumented (actually, it is now documented) trick.
// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsdebug/html/vxtsksettingthreadname.asp
void SetCurrentThreadName(const TCHAR* szThreadName)
{
THREADNAME_INFO info;
info.dwType = 0x1000;
#ifdef UNICODE
//TODO: Find the proper way to do this.
char tname[256];
unsigned int i;
for (i = 0; i < _tcslen(szThreadName); i++)
{
tname[i] = (char)szThreadName[i]; //poor man's unicode->ansi, TODO: fix
}
tname[i] = 0;
info.szName = tname;
#else
info.szName = szThreadName;
#endif
info.dwThreadID = -1; //dwThreadID;
info.dwFlags = 0;
__try
{
RaiseException(0x406D1388, 0, sizeof(info) / sizeof(DWORD), (ULONG_PTR*)&info);
}
__except(EXCEPTION_CONTINUE_EXECUTION)
{}
}
#elif __GNUC__
CriticalSection::CriticalSection(int spincount_unused)
{
pthread_mutex_init(&mutex, 0);
}
CriticalSection::~CriticalSection()
{
pthread_mutex_destroy(&mutex);
}
void CriticalSection::Enter()
{
pthread_mutex_lock(&mutex);
}
bool CriticalSection::TryEnter()
{
return(!pthread_mutex_trylock(&mutex));
}
void CriticalSection::Leave()
{
pthread_mutex_unlock(&mutex);
}
Thread::Thread(ThreadFunc function, void* arg)
: thread_id(0)
{
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, 1024 * 1024);
pthread_create(&thread_id, &attr, function, arg);
}
Thread::~Thread()
{
WaitForDeath();
}
void Thread::WaitForDeath()
{
if (thread_id)
{
void* exit_status;
pthread_join(thread_id, &exit_status);
thread_id = 0;
}
}
void Thread::SetAffinity(int mask)
{
// This is non-standard
#ifdef __linux__
cpu_set_t cpu_set;
CPU_ZERO(&cpu_set);
for (unsigned int i = 0; i < sizeof(mask) * 8; i++)
{
if ((mask >> i) & 1){CPU_SET(i, &cpu_set);}
}
pthread_setaffinity_np(thread_id, sizeof(cpu_set), &cpu_set);
#endif
}
void Thread::SetCurrentThreadAffinity(int mask)
{
#ifdef __linux__
cpu_set_t cpu_set;
CPU_ZERO(&cpu_set);
for (size_t i = 0; i < sizeof(mask) * 8; i++)
{
if ((mask >> i) & 1){CPU_SET(i, &cpu_set);}
}
pthread_setaffinity_np(pthread_self(), sizeof(cpu_set), &cpu_set);
#endif
}
void SleepCurrentThread(int ms)
{
usleep(1000 * ms);
}
void SetCurrentThreadName(const TCHAR* szThreadName)
{
// noop
}
Event::Event()
{
is_set_ = false;
}
void Event::Init()
{
pthread_cond_init(&event_, 0);
pthread_mutex_init(&mutex_, 0);
}
void Event::Shutdown()
{
pthread_mutex_destroy(&mutex_);
pthread_cond_destroy(&event_);
}
void Event::Set()
{
pthread_mutex_lock(&mutex_);
if (!is_set_)
{
is_set_ = true;
pthread_cond_signal(&event_);
}
pthread_mutex_unlock(&mutex_);
}
void Event::Wait()
{
pthread_mutex_lock(&mutex_);
while (!is_set_)
{
pthread_cond_wait(&event_, &mutex_);
}
is_set_ = false;
pthread_mutex_unlock(&mutex_);
}
int InterlockedIncrement(int *Addend)
{
#if defined(__GNUC__) && defined (__GNUC_MINOR__) && ((4 < __GNUC__) || (4 == __GNUC__ && 1 <= __GNUC_MINOR__))
return __sync_add_and_fetch(Addend, 1);
#else
register int result;
__asm__ __volatile__("lock; xadd %0,%1"
: "=r" (result), "=m" (1)
: "0" (Increment), "m" (1)
: "memory");
return result + 1;
#endif
}
int InterlockedExchangeAdd(int *Addend, int Increment)
{
#if defined(__GNUC__) && defined (__GNUC_MINOR__) && ((4 < __GNUC__) || (4 == __GNUC__ && 1 <= __GNUC_MINOR__))
return __sync_add_and_fetch(Addend, Increment);
#else
register int result;
__asm__ __volatile__("lock; xadd %0,%1"
: "=r" (result), "=m" (*Addend)
: "0" (Increment), "m" (*Addend)
: "memory");
return result + Increment;
#endif
}
int InterlockedExchange(int *Addend, int Increment)
{
#if defined(__GNUC__) && defined (__GNUC_MINOR__) && ((4 < __GNUC__) || (4 == __GNUC__ && 1 <= __GNUC_MINOR__))
return __sync_lock_test_and_set(Addend, Increment);
#else
// TODO:
#warning Support older GCC Versions
#endif
}
#endif
} // end of namespace Common