[SOLVED] query about few threading terms

[syedshan]

hello every one,


I am understanding and implementing the concept of threading in my application. Since now things are going good. But I have few questions still unanswered and they are making me slow now. I would appreciate if anyone replies to even any of them

1. In Createthread(), can we only take 1 argument? as I have seen in MSDN website and all other examples that I have seen I saw only 1 argument, LPVOID.

2. The other thing is , what does the return value DWORD WINAPI means as a return value? Can we have only DWORD , int or any other return type. I suppose it has something to do with HANDLE (may be)

3. I want to use the array of the thread, hence I learn the array to functions, and (as I have understood) threads are itself just a function called by CreateThread() routine, hence I tried to implement that concept there but could not because of the return type DWORD WINAPI was not allowing me to do so?

4. I have one single thread for saving files, now I want its array so that I can save multiple files at the same time (not exaclty the same starting time, but sort of parallel file saving). How can I do that?

Thanks
Shan

 

[syedshan]

hi
I found the answer to following questions

In Createthread(), can we only take 1 argument? as I have seen in MSDN website and all other examples that I have seen I saw only 1 argument, LPVOID.

We can make struct and inside struct we can define several variables to achieve our goal

I want to use the array of the thread, hence I learn the array to functions, and (as I have understood) threads are itself just a function called by CreateThread() routine, hence I tried to implement that concept there but could not because of the return type DWORD WINAPI was not allowing me to do so?

for array of threads calling the same CreateThread() function multuple time is enough. See the code below

HANDLE Array_Of_Thread_Handles[nbr_of_thread] = {0};
for(th=0->nbr_of_thread){
 Array_Of_Thread_Handles[th_l] = CreateThread( NULL, 0, save_uwpi_thread_file, &SDT1[th_l], 0, NULL);
 //where save_uwpi_thread_file is the actual function
 // SDT1 is the structure variable which will pass multiple argument as one structure
}

I have one single thread for saving files, now I want its array so that I can save multiple files at the same time (not exaclty the same starting time, but sort of parallel file saving). How can I do that?

using above example and with the use of global flags ON and OFF this can be achieved