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threadserver.h
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225 lines (189 loc) · 4.8 KB
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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
/// \file threadserver.h
/// \author David Rohr
#ifndef THREADSERVER_H
#define THREADSERVER_H
#ifdef _WIN32
#include "pthread_mutex_win32_wrapper.h"
#include "sched_affinity_win32_wrapper.h"
#else
#include <pthread.h>
#include <sched.h>
#endif
#include "qsem.h"
class qThreadServerException
{
};
template <class S, class T>
class qThreadCls;
class qThreadParam
{
template <class S, class T>
friend class qThreadCls;
public:
qThreadParam()
{
for (int32_t i = 0; i < 2; i++) {
threadMutex[i].Lock();
}
terminate = false;
pinCPU = -1;
}
~qThreadParam()
{
for (int32_t i = 0; i < 2; i++) {
threadMutex[i].Unlock();
}
}
bool WaitForTask()
{
threadMutex[1].Unlock();
threadMutex[0].Lock();
return (!terminate);
}
int32_t threadNum;
protected:
int32_t pinCPU;
qSem threadMutex[2];
volatile bool terminate;
};
template <class S>
class qThreadParamCls : public qThreadParam
{
template <class SS, class TT>
friend class qThreadCls;
private:
S* pCls;
void (S::*pFunc)(void*);
};
template <class S, class T>
static void* qThreadWrapperCls(void* arg);
template <class S, class T>
class qThreadCls
{
public:
qThreadCls() { started = false; };
qThreadCls(S* pCls, void (S::*pFunc)(T*), int32_t threadNum = 0, int32_t pinCPU = -1) : threadParam()
{
started = false;
SpawnThread(pCls, pFunc, threadNum, pinCPU);
}
void SpawnThread(S* pCls, void (S::*pFunc)(T*), int32_t threadNum = 0, int32_t pinCPU = -1, bool wait = true)
{
qThreadParamCls<S>& XthreadParam = *((qThreadParamCls<S>*)&this->threadParam);
XthreadParam.pCls = pCls;
XthreadParam.pFunc = (void(S::*)(void*))pFunc;
XthreadParam.threadNum = threadNum;
XthreadParam.pinCPU = pinCPU;
pthread_t thr;
pthread_create(&thr, nullptr, (void* (*)(void*)) & qThreadWrapperCls, &XthreadParam);
if (wait) {
WaitForSpawn();
}
started = true;
}
void WaitForSpawn() { threadParam.threadMutex[1].Lock(); }
~qThreadCls()
{
if (started) {
End();
}
}
void End()
{
qThreadParamCls<S>& XthreadParam = *((qThreadParamCls<S>*)&this->threadParam);
XthreadParam.terminate = true;
XthreadParam.threadMutex[0].Unlock();
XthreadParam.threadMutex[1].Lock();
started = false;
}
void Start() { threadParam.threadMutex[0].Unlock(); }
void Sync() { threadParam.threadMutex[1].Lock(); }
private:
bool started;
T threadParam;
static void* qThreadWrapperCls(T* arg);
};
template <class S, class T>
void* qThreadCls<S, T>::qThreadWrapperCls(T* arg)
{
qThreadParamCls<S>* const arg_A = (qThreadParamCls<S>*)arg;
if (arg_A->pinCPU != -1) {
cpu_set_t tmp_mask;
CPU_ZERO(&tmp_mask);
CPU_SET(arg_A->pinCPU, &tmp_mask);
sched_setaffinity(0, sizeof(tmp_mask), &tmp_mask);
}
void (S::*pFunc)(T*) = (void(S::*)(T*))arg_A->pFunc;
(arg_A->pCls->*pFunc)(arg);
arg_A->threadMutex[1].Unlock();
pthread_exit(nullptr);
return (nullptr);
}
template <class S, class T>
class qThreadClsArray
{
public:
qThreadClsArray()
{
pArray = nullptr;
nThreadsRunning = 0;
}
qThreadClsArray(int32_t n, S* pCls, void (S::*pFunc)(T*), int32_t threadNumOffset = 0, int32_t* pinCPU = nullptr)
{
pArray = nullptr;
nThreadsRunning = 0;
SetNumberOfThreads(n, pCls, pFunc, threadNumOffset, pinCPU);
}
void SetNumberOfThreads(int32_t n, S* pCls, void (S::*pFunc)(T*), int32_t threadNumOffset = 0, int32_t* pinCPU = nullptr)
{
if (nThreadsRunning) {
fprintf(STD_OUT, "Threads already started\n");
throw(qThreadServerException());
}
pArray = new qThreadCls<S, T>[n];
nThreadsRunning = n;
for (int32_t i = 0; i < n; i++) {
pArray[i].SpawnThread(pCls, pFunc, threadNumOffset + i, pinCPU == nullptr ? -1 : pinCPU[i], false);
}
for (int32_t i = 0; i < n; i++) {
pArray[i].WaitForSpawn();
}
}
~qThreadClsArray()
{
if (nThreadsRunning) {
EndThreads();
}
}
void EndThreads()
{
delete[] pArray;
nThreadsRunning = 0;
}
void Start()
{
for (int32_t i = 0; i < nThreadsRunning; i++) {
pArray[i].Start();
}
}
void Sync()
{
for (int32_t i = 0; i < nThreadsRunning; i++) {
pArray[i].Sync();
}
}
private:
qThreadCls<S, T>* pArray;
int32_t nThreadsRunning;
};
#endif