C++ Win32 Threads

C++ Win32 Threads

本文关键字：Threads Win32 C++      更新时间：2023-10-16

我在使用_beginthreadex时遇到了一些问题。如何将我创建的函数发送到线程？我对线程完全陌生，这太愚蠢了，但我无法处理它

//Function that I want to send to a thread
vector<int>F1(vector<int> A, vector<int> B, vector<int> C, vector<int> D, vector<vector<int>> MA, vector<vector<int>> MD) { 
vector<int> ResVect;
ResVect = plusVector(plusVector(A, plusVector(B, C)), VectMultMatr(D, MultMatr(MA, MD)));   
return ResVect; 
}
//Thread funcF1
int main(){
HANDLE funcF1, funcF2, funcF3;
//////F1//////
cout << "Task 1 starts" << endl;
vector<int>A = createVect(1, 4);
vector<int>B = createVect(1, 4);
vector<int>C = createVect(1, 4);
vector<int>D = createVect(1, 4);
vector<vector<int>>MA = createMatrix(1, 4);
vector<vector<int>>MD = createMatrix(1, 4);
//vector<int>E = F1(A, B, C, D, MA, MD);
funcF1 = (HANDLE)_beginthreadex(0, 0, &F1(A, B, C, D, MA, MD), 0, 0, 0);
}

如果您阅读_beginthreadex文档，您会发现您传入的函数与_beginthreadex期望的签名不匹配：

unsigned ( __stdcall *start_address )( void * )

要执行您正在尝试的操作，您需要一个确切签名的函数来包装您的真实函数。

尝试更多类似的东西：

vector<int> F1(vector<int> A, vector<int> B, vector<int> C, vector<int> D, vector<vector<int>> MA, vector<vector<int>> MD) {    
return plusVector(plusVector(A, plusVector(B, C)), VectMultMatr(D, MultMatr(MA, MD)));  
}
struct myVecs {
vector<int> A;
vector<int> B;
vector<int> C;
vector<int> D;
vector<vector<int>> MA;
vector<vector<int>> MD;
};
unsigned __stdcall myThreadFunc(void *arg) {
myVecs *vecs = (myVecs*) arg;
vector<int> E = F1(vecs->A, vecs->B, vecs->C, vecs->D, vecs->MA, vecs->MD);
// use E as needed...
delete vecs;
return 0;
}
int main(){
HANDLE funcF1;
//////F1//////
cout << "Task 1 starts" << endl;
myVecs *vecs = new myVecs;
vecs->A = createVect(1, 4);
vecs->B = createVect(1, 4);
vecs->C = createVect(1, 4);
vecs->D = createVect(1, 4);
vecs->MA = createMatrix(1, 4);
vecs->MD = createMatrix(1, 4);
funcF1 = (HANDLE) _beginthreadex(0, 0, &myThreadFunc, vecs, 0, 0);
if (func1 == 0) {
// error handling...
delete vecs;
}
// do other things as needed...
// wait for thread to terminate before exiting the app...
return 0;
}
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