Threadz与C++ Builder,特别是ezy。如果你不需要任何GUI通信。我必须咨询SO关于GUI通信的问题 - 需要一个宏来处理这些消息,并且我提供了错误的表单类 - 我得到了堆栈溢出:)
'类中有一个TThread类',类似于Delphi。覆盖“执行”来获得执行你的线程代码,如:
class TpoolThread : public TThread{
CBthreadPool *FmyPool;
protected:
virtual void __fastcall Execute(void);
public:
TpoolThread(CBthreadPool *myPool):TThread(true){
FmyPool=myPool;
Resume();
};
};
如果你没有的TThread类,(我有C++ Builder的2009 - 不知道更早的版本),你可以依靠的API调用的建议由@inkooboo。 WINAPI CreateThread()只会调用一个简单的C风格函数或静态方法,因此您通常需要显式传递一个实例(通常为'this')作为CreateThread参数,以便从线程代码调用实例方法。使用的CreateThread API,(虽然我敢肯定,如果你有STL,你将有TThread类以及)线程池例如:
#ifndef cthreadpoolH
#define cthreadpoolH
#include <Classes.hpp>
#include <deque.h>
class ThreadPool;
class PoolTask {
friend class ThreadPool;
TNotifyEvent FonComplete;
protected:
ThreadPool *myPool;
int param;
public:
PoolTask(int inParam, TNotifyEvent OnDone):param(inParam),FonComplete(OnDone){};
virtual void run()=0;
};
template <typename T> class PCSqueue{
CRITICAL_SECTION access;
deque<T> *objectQueue;
HANDLE queueSema;
public:
PCSqueue(){
objectQueue=new deque<T>;
InitializeCriticalSection(&access);
queueSema=CreateSemaphore(NULL,0,MAXINT,NULL);
};
void push(T ref){
EnterCriticalSection(&access);
objectQueue->push_front(ref);
LeaveCriticalSection(&access);
ReleaseSemaphore(queueSema,1,NULL);
};
bool pop(T *ref,DWORD timeout){
if (WAIT_OBJECT_0==WaitForSingleObject(queueSema,timeout)) {
EnterCriticalSection(&access);
*ref=objectQueue->back();
objectQueue->pop_back();
LeaveCriticalSection(&access);
return(true);
}
else
return(false);
};
};
class ThreadPool {
int FthreadCount;
PCSqueue<PoolTask*> queue;
public:
ThreadPool(int initThreads){
for(FthreadCount=0;FthreadCount!=initThreads;FthreadCount++){
CreateThread(NULL,0,staticThreadRun,this,0,0);
};
}
void setThreadCount(int newCount){
while(FthreadCount<newCount){
CreateThread(NULL,0,staticThreadRun,this,0,0);
FthreadCount++;
};
while(FthreadCount>newCount){
queue.push((PoolTask*)NULL);
FthreadCount--;
};
}
static DWORD _stdcall staticThreadRun(void *param){
ThreadPool *myPool=(ThreadPool*)param;
PoolTask *thisTask;
SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_BELOW_NORMAL);
while (myPool->queue.pop(&thisTask,INFINITE)){
if(thisTask==NULL){return(0);};
thisTask->run();
if (thisTask->FonComplete!=NULL) {
thisTask->FonComplete((TObject*)thisTask);
}
}
}
void submit(PoolTask *aTask){
aTask->myPool=this;
queue.push(aTask);
};
};
#endif
我认为这是不鼓励在C++ Builder的使用FORMCREATE(),从我还记得什么,它与Delphi保持一定的兼容性。您应该在窗体的构造函数或FormShow事件中创建线程。 – Lundin 2012-09-24 12:55:29