Question

Consider the code below:

for (int i = 0; i < thread_number; i ++)
    hThreadArray[i] = CreateThread( 
            0,                   
            0,                      
            single_thread_function_name,      
            (LPVOID)i,                      
            0,                      
            &dwThreadIdArray[i]);   


WaitForMultipleObjects(thread_number, hThreadArray, TRUE, INFINITE);

It works correctly on 32 bit platform, but on 64 bit it crashes.

The crash happens in the WaitForMultipleObjects function.

Anyone know what i’m doing wrong?

Edit:
hThreadArray is declared as:

HANDLE*  hThreadArray;
hThreadArray = (HANDLE*) malloc (thread_number * sizeof(HANDLE));

The single_thread_function_name as:

DWORD WINAPI single_thread_function_name( LPVOID lpParam ){
.....
return 0;
}

Answer 1

hThreadArray is not an array, just a pointer, it certainly should crash. It is strange how it works on 32-bit platform.

As hThreadArray is malloced, maybe it does not meet 64-bit alignment requirements. Try with:

HANDLE hThreadArray[100] = {0};