C++ LANGUAGE CREATING THREAD

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C++ LANGUAGE CREATING THREAD

Creating Threads 


The following routine is used to create a POSIX thread: 

#include <pthread.h> 

pthread_create (thread, attr, start_routine, arg)  

Here, pthread_create creates a new thread and makes it executable. 
This routine can be called any number of times from anywhere within 
your code. Here is the description of the parameters: 




Parameter    Description 

thread            An opaque, unique identifier for the new 
                  thread returned by the subroutine. 

attr            An opaque attribute object that may be used to 
                  set thread attributes. You can specify a thread 
                  attributes object, or NULL for the default values. 

start_routine    The C++ routine that the thread will execute once it is created. 

arg            A single argument that may be passed to start_routine. 
                  It must be passed by reference as a pointer cast of type void. 
                  NULL may be used if no argument is to be passed. 

The maximum number of threads that may be created by a process is implementation 
dependent. Once created, threads are peers, and may create other threads. 
There is no implied hierarchy or dependency between threads.