Threadz與C++ Builder,特別是ezy。如果你不需要任何GUI通信。我必須諮詢SO關於GUI通信的問題 - 需要一個宏來處理這些消息,並且我提供了錯誤的表單類 - 我得到了堆棧溢出:)
'類中有一個TThread類',類似於Delphi。覆蓋「執行」來獲得執行你的線程代碼,如:
class TpoolThread : public TThread{
CBthreadPool *FmyPool;
protected:
virtual void __fastcall Execute(void);
public:
TpoolThread(CBthreadPool *myPool):TThread(true){
FmyPool=myPool;
Resume();
};
};
如果你沒有的TThread類,(我有C++ Builder的2009 - 不知道更早的版本),你可以依靠的API調用的建議由@inkooboo。 WINAPI CreateThread()只會調用一個簡單的C風格函數或靜態方法,因此您通常需要顯式傳遞一個實例(通常爲'this')作爲CreateThread參數,以便從線程代碼調用實例方法。使用的CreateThread API,(雖然我敢肯定,如果你有STL,你將有TThread類以及)線程池例如:
#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
我認爲這是不鼓勵在C++ Builder的使用FORMCREATE(),從我還記得什麼,它與Delphi保持一定的兼容性。您應該在窗體的構造函數或FormShow事件中創建線程。 – Lundin 2012-09-24 12:55:29