How to get more than one thread to execute at a time?

[ekailan]

I am working on creating windows.h to creat tow threads, each thread takes tow files as input, the function that each thread excute is tested and work 100%,the problem is that one thread could work at atime ?

I mean one function is excuted this is the threading code i dont know what is the problem. I tried to pass different files to each thread but its still not working
*************** ************

 //----------------------------------------------// A function that represents Thread number 1 WM//----------------------------------------------DWORD WINAPI Thread_no_1( LPVOID S ) { data_files *My_files = (data_files *)(S);            HANDLE  hStdout = NULL;     // Get Handle To screen. Else how will we print?    if( (hStdout = GetStdHandle(STD_OUTPUT_HANDLE)) == INVALID_HANDLE_VALUE )  		return 1;     // Cast the parameter to the correct data type passed by callee i.e main() in our case.    string text=My_files->text;	string pattern=My_files->pattern; 		fw(text,pattern );} //----------------------------------------------// A function that represents Thread number 2 AC//----------------------------------------------DWORD WINAPI Thread_no_2( LPVOID W ) { data_files *fA_files = (data_files *)(W);            HANDLE  hStdout = NULL;     // Get Handle To screen. Else how will we print?    if( (hStdout = GetStdHandle(STD_OUTPUT_HANDLE)) == INVALID_HANDLE_VALUE )  		return 1;     // Cast the parameter to the correct data type passed by callee i.e main() in our case.    string text=aA_files->text;	string pattern=fA_files->pattern; 		fA(text,pattern ); }   int _tmain(int argc, _TCHAR* argv[])  {	string pattern,text;    cout<<"Enter patterns file name.\n";    cin>>pattern;     cout<<"Enter text file name.\n";    cin>>text;  /////////////////// Threading     // Data of Thread 1 	data_files *Data_Of_Thread_1=new data_files ;            	Data_Of_Thread_1->text=text;	Data_Of_Thread_1->pattern=pattern;    LPVOID S;     S = (LPVOID)Data_Of_Thread_1;     //End Data of Thread 1     // Data of Thread 2 	data_files *Data_Of_Thread_2=new data_files ;               Data_Of_Thread_2->text=text;	Data_Of_Thread_2->pattern=pattern;    LPVOID H;     H = (LPVOID)Data_Of_Thread_2;     //End Data of Thread 2  	HANDLE Handle_Of_Thread_1 = 0;       // variable to hold handle of Thread 1	HANDLE Handle_Of_Thread_2 = 0;       // variable to hold handle of Thread 2   	HANDLE Array_Of_Thread_Handles[2];   // Aray to store thread handles   	// Create thread 1.     Handle_Of_Thread_1 = CreateThread( NULL, 0, Thread_no_1,S, 0, NULL);      if ( Handle_Of_Thread_1 == NULL)  ExitProcess(0); 	// Create thread 2.	Handle_Of_Thread_2 = CreateThread( NULL, 0, Thread_no_2,H, 0, NULL);      if ( Handle_Of_Thread_2 == NULL)  ExitProcess(0);   	// Store Thread handles in Array of Thread Handles as per the requirement of WaitForMultipleObjects() 	Array_Of_Thread_Handles[0] = Handle_Of_Thread_1;	Array_Of_Thread_Handles[1] = Handle_Of_Thread_2;  	// Wait until all threads have terminated.    WaitForMultipleObjects( 2, Array_Of_Thread_Handles, TRUE, INFINITE); 	printf("Since All threads executed close their handles \n"); 	// Close all thread handles upon completion.    CloseHandle(Handle_Of_Thread_1);    CloseHandle(Handle_Of_Thread_2);      }
//----------------------------------------------
// A function that represents Thread number 1 
//----------------------------------------------
DWORD WINAPI Thread_no_1( LPVOID S ) 
{ data_files *My_files = (data_files *)(S);      


    HANDLE  hStdout = NULL;

    // Get Handle To screen. Else how will we print?
    if( (hStdout = GetStdHandle(STD_OUTPUT_HANDLE)) == INVALID_HANDLE_VALUE )  
		return 1;

    // Cast the parameter to the correct data type passed by callee i.e main() in our case.
    string text=My_files->text;
	string pattern=My_files->pattern;

		fw(text,pattern );
} 
//----------------------------------------------
// A function that represents Thread number 2 
//----------------------------------------------
DWORD WINAPI Thread_no_2( LPVOID W ) 
{ data_files *fA_files = (data_files *)(W);      


    HANDLE  hStdout = NULL;

    // Get Handle To screen. Else how will we print?
    if( (hStdout = GetStdHandle(STD_OUTPUT_HANDLE)) == INVALID_HANDLE_VALUE )  
		return 1;

    // Cast the parameter to the correct data type passed by callee i.e main() in our case.
    string text=aA_files->text;
	string pattern=fA_files->pattern;

		fA(text,pattern );
		
} 


int _tmain(int argc, _TCHAR* argv[]) 

{
	string pattern,text;
    cout<<"Enter patterns file name.\n";
    cin>>pattern;

    cout<<"Enter text file name.\n";
    cin>>text;

   
/////////////////// Threading

    // Data of Thread 1

	data_files *Data_Of_Thread_1=new data_files ;           
    
	Data_Of_Thread_1->text=text;
	Data_Of_Thread_1->pattern=pattern;
    LPVOID S;

    S = (LPVOID)Data_Of_Thread_1;

    //End Data of Thread 1

    // Data of Thread 2
    
	data_files *Data_Of_Thread_2=new data_files ;           
    Data_Of_Thread_2->text=text;
	Data_Of_Thread_2->pattern=pattern;
    LPVOID H;

    H = (LPVOID)Data_Of_Thread_2;

    //End Data of Thread 2
	           
	
	HANDLE Handle_Of_Thread_1 = 0;       // variable to hold handle of Thread 1
	HANDLE Handle_Of_Thread_2 = 0;       // variable to hold handle of Thread 2 
	
 	HANDLE Array_Of_Thread_Handles[2];   // Aray to store thread handles 

 	// Create thread 1.

    Handle_Of_Thread_1 = CreateThread( NULL, 0, Thread_no_1,S, 0, NULL);  
    if ( Handle_Of_Thread_1 == NULL)  ExitProcess(0);
    
	// Create thread 2.
	Handle_Of_Thread_2 = CreateThread( NULL, 0, Thread_no_2,H, 0, NULL);  
    if ( Handle_Of_Thread_2 == NULL)  ExitProcess(0);
    
	

	// Store Thread handles in Array of Thread Handles as per the requirement of WaitForMultipleObjects() 
	Array_Of_Thread_Handles[0] = Handle_Of_Thread_1;
	Array_Of_Thread_Handles[1] = Handle_Of_Thread_2;
	
    
	// Wait until all threads have terminated.
    WaitForMultipleObjects( 2, Array_Of_Thread_Handles, TRUE, INFINITE);

	printf("Since All threads executed close their handles \n");

	// Close all thread handles upon completion.
    CloseHandle(Handle_Of_Thread_1);
    CloseHandle(Handle_Of_Thread_2);
	





}

[JavierL]

It isnt clear what you need help to. I supose you want the two threads to execute at the exactly SAME time? i think that's handled by the OS itself.

[ekailan]

yes, the problem is when i run this code one thread is excuted then the system teriminate the threads and exit is it possible that this problem caused by line 88
"

 ExitProcess(0);

" .

each program have to open the same files , they poth perform open file ....mybe this is the problem i dont know!!!!!!!!

[JavierL]

You can't open the same file twice :l, maybe do a copy in plain text, to access them independently by each thread?