threading.c

#include <windows.h>

int G_counter = 0;

//-------------------------------------------
// A function that represents Thread number 1
//-------------------------------------------
DWORD WINAPI Thread_no_1(LPVOID lpParam)
{
	// Cast the parameter to the correct
	// data type passed by callee i.e main() in our case.
	int Data = *((int*)lpParam);
	for (int count = 0; count <= 4; count++)
	{
		printf("1- Data: %02d, Global Counter: %02d, Local Counter: %02d, Clock: %09d \n", Data, G_counter++, count, clock());
		Sleep(1000);//Sleep for 1 second == 1000 mili-second
	}
	return 0;
}

//-------------------------------------------
// A function that represents Thread number 2
//-------------------------------------------
DWORD WINAPI Thread_no_2(LPVOID lpParam)
{
	// Cast the parameter to the correct
	// data type passed by callee i.e main() in our case.
	int Data = *((int*)lpParam);
	for (int count = 0; count <= 7; count++)
	{
		printf("2- Data: %02d, Global Counter: %02d, Local Counter: %02d, Clock: %09d \n", Data, G_counter++, count, clock());
		Sleep(1000);
	}
	return 0;
}

//-------------------------------------------
// A function that represents Thread number 3
//-------------------------------------------
DWORD WINAPI Thread_no_3(LPVOID lpParam)
{
	// Cast the parameter to the correct
	// data type passed by callee i.e main() in our case.
	int Data = *((int*)lpParam);
	for (int count = 0; count <= 10; count++)
	{
		printf("3- Data: %02d, Global Counter: %02d, Local Counter: %02d, Clock: %09d \n", Data, G_counter++, count, clock());
		Sleep(1000);
	}
	return 0;
}


void main()
{
	// Data of Thread 1
	int Data_Of_Thread_1 = 10;
	// Data of Thread 2
	int Data_Of_Thread_2 = 20;
	// Data of Thread 3
	int Data_Of_Thread_3 = 30;
	// variable to hold handle of Threads
	HANDLE Handle_Of_Thread_1 = NULL, Handle_Of_Thread_2 = NULL, Handle_Of_Thread_3 = NULL;
	

	// Create thread 1.
	Handle_Of_Thread_1 = CreateThread(NULL,//Security Param
										0,// default stack size
										Thread_no_1,// thread function name
										&Data_Of_Thread_1, // pointer to thread argument
										0,// 0=run immeditly | CREATE_SUSPENDED
										NULL // OUT : return thead pointer
										);
	// Create thread 2.
	Handle_Of_Thread_2 = CreateThread(NULL, 0,Thread_no_2, &Data_Of_Thread_2, 0, NULL);
	
	// Create thread 3.
	Handle_Of_Thread_3 = CreateThread(NULL, 0, Thread_no_3, &Data_Of_Thread_3, 0, NULL);
	
	// Store Thread handles in Array of Thread
	// Handles as per the requirement
	// of WaitForMultipleObjects() 
	HANDLE Array_Of_Thread_Handles[3];
	Array_Of_Thread_Handles[0] = Handle_Of_Thread_1;
	Array_Of_Thread_Handles[1] = Handle_Of_Thread_2;
	Array_Of_Thread_Handles[2] = Handle_Of_Thread_3;

	if (Handle_Of_Thread_1 == NULL || Handle_Of_Thread_2 == NULL || Handle_Of_Thread_3 == NULL)
		return 1;
	// Wait until all threads have terminated.
	WaitForMultipleObjects(3, // Num of Thread
		Array_Of_Thread_Handles, // Thread array
		TRUE, // wait all ? TRUE | FLASE
		INFINITE // number of milliseconds to wait
		);

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

	// Close all thread handles upon completion.
	CloseHandle(Handle_Of_Thread_1);
	CloseHandle(Handle_Of_Thread_2);
	CloseHandle(Handle_Of_Thread_3);
}