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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "Threading.h"
#include "Rendering/GL/myGL.h"
#include <boost/thread.hpp>
#if defined(__APPLE__)
#elif defined(WIN32)
#include <windows.h>
#else
#if defined(__USE_GNU)
#include <sys/prctl.h>
#endif
#include <sched.h>
#endif
namespace Threading {
static Error* threadError = NULL;
static bool haveMainThreadID = false;
static boost::thread::id mainThreadID;
static NativeThreadId nativeMainThreadID;
#ifdef USE_GML
static int const noThreadID = -1;
static int simThreadID = noThreadID;
static int batchThreadID = noThreadID;
#else
static boost::thread::id noThreadID;
static boost::thread::id simThreadID;
static boost::thread::id batchThreadID;
#endif
boost::uint32_t SetAffinity(boost::uint32_t cores_bitmask, bool hard)
{
if (cores_bitmask == 0) {
return 0xFFFFFF;
}
#if defined(__APPLE__)
// no-op
#elif defined(WIN32)
// Get the available cores
DWORD curMask;
DWORD cpusSystem = 0;
GetProcessAffinityMask(GetCurrentProcess(), &curMask, &cpusSystem);
// Create mask
DWORD_PTR cpusWanted = (cores_bitmask & cpusSystem);
// Set the affinity
HANDLE thread = GetCurrentThread();
DWORD_PTR result = 0;
if (hard) {
result = SetThreadAffinityMask(thread, cpusWanted);
} else {
result = SetThreadIdealProcessor(thread, (DWORD)cpusWanted);
}
// Return final mask
return (result > 0) ? (boost::uint32_t)cpusWanted : 0;
#else
// Get the available cores
cpu_set_t cpusSystem; CPU_ZERO(&cpusSystem);
cpu_set_t cpusWanted; CPU_ZERO(&cpusWanted);
sched_getaffinity(0, sizeof(cpu_set_t), &cpusSystem);
// Create mask
int numCpus = std::min(CPU_COUNT(&cpusSystem), 32); // w/o the min(.., 32) `(1 << n)` could overflow!
for (int n = numCpus - 1; n >= 0; --n) {
if ((cores_bitmask & (1 << n)) != 0) {
CPU_SET(n, &cpusWanted);
}
}
CPU_AND(&cpusWanted, &cpusWanted, &cpusSystem);
// Set the affinity
int result = sched_setaffinity(0, sizeof(cpu_set_t), &cpusWanted);
// Return final mask
uint32_t finalMask = 0;
for (int n = numCpus - 1; n >= 0; --n) {
if (CPU_ISSET(n, &cpusWanted)) {
finalMask |= (1 << n);
}
}
return (result == 0) ? finalMask : 0;
#endif
}
unsigned GetAvailableCores()
{
return boost::thread::hardware_concurrency();
}
NativeThreadHandle GetCurrentThread()
{
#ifdef WIN32
// we need to use this cause GetCurrentThread() just returns a pseudo handle,
// which returns in all threads the current active one, so we need to translate it
// with DuplicateHandle to an absolute handle valid in our watchdog thread
NativeThreadHandle hThread;
::DuplicateHandle(::GetCurrentProcess(), ::GetCurrentThread(), ::GetCurrentProcess(), &hThread, 0, TRUE, DUPLICATE_SAME_ACCESS);
return hThread;
#else
return pthread_self();
#endif
}
NativeThreadId GetCurrentThreadId()
{
#ifdef WIN32
return ::GetCurrentThreadId();
#else
return pthread_self();
#endif
}
void SetMainThread()
{
if (!haveMainThreadID) {
haveMainThreadID = true;
mainThreadID = boost::this_thread::get_id();
nativeMainThreadID = Threading::GetCurrentThreadId();
}
}
bool IsMainThread()
{
return (boost::this_thread::get_id() == Threading::mainThreadID);
}
bool IsMainThread(NativeThreadId threadID)
{
return NativeThreadIdsEqual(threadID, Threading::nativeMainThreadID);
}
void SetSimThread(bool set) {
#ifdef USE_GML // GML::ThreadNumber() is likely to be much faster than boost::this_thread::get_id()
batchThreadID = simThreadID = set ? GML::ThreadNumber() : noThreadID;
#else
batchThreadID = simThreadID = set ? boost::this_thread::get_id() : noThreadID;
#endif
}
bool IsSimThread() {
#ifdef USE_GML
return GML::ThreadNumber() == simThreadID;
#else
return boost::this_thread::get_id() == simThreadID;
#endif
}
void SetBatchThread(bool set) {
#ifdef USE_GML // GML::ThreadNumber() is likely to be much faster than boost::this_thread::get_id()
batchThreadID = set ? GML::ThreadNumber() : noThreadID;
#else
batchThreadID = set ? boost::this_thread::get_id() : noThreadID;
#endif
}
bool IsBatchThread() {
#ifdef USE_GML
return GML::ThreadNumber() == batchThreadID;
#else
return boost::this_thread::get_id() == batchThreadID;
#endif
}
void SetThreadName(std::string newname)
{
#if defined(__USE_GNU) && !defined(WIN32)
//alternative: pthread_setname_np(pthread_self(), newname.c_str());
prctl(PR_SET_NAME, newname.c_str(), 0, 0, 0);
#endif
}
void SetThreadError(const Error& err)
{
threadError = new Error(err); //FIXME memory leak!
}
Error* GetThreadError()
{
return threadError;
}
};
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