getpid example

Pthread_create is a thread function created in a Unix environment.   Specific format: # Include Int pthread_create (pthread_t * restrict TIDP, const pthread_attr_t * restrict ATTR, void * (* start_rtn) (void *), void * restrict Arg ); Return Value:

Function Description: Getpid returns the current process ID, and getppid returns the parent process ID. Usage:# Include # Include Pid_t getpid (void );Pid_t getppid (void ); Example: # Include # Include # Include int main (void) {

Pthread_create is a thread function created in a UNIX environment.Specific format: # Include Int pthread_create (pthread_t * restrict tidp, const pthread_attr_t * restrict attr, void * (* start_rtn) (void *), void * restrict arg );Return Value: If

(1) Basic Process Environment A process is an execution of a program. It is a program that runs in its own virtual address space and has independent functions. Processes are the basic unit for allocating and releasing resources. When a program is

http://blog.csdn.net/jason314/article/details/5640969The fork () call will copy a new process that is almost identical to the current process (except for the fork's return value), each of which has its own space, each with its own local variables,

I. Introduction to fork   A process, including code, data, and resources allocated to the process. The fork () function creates a process that is almost identical to the original process through system calls, that is, the two processes can do

31. Communication between mutex lock and process, 31 mutex lock Process We have done multi-process concurrency before, so have you found any problems. If multiple processes share the same data, for example, what will happen if you want to view and

MPs queue The following is the pipeline implementation file pipe_imp.c, which contains the client and server functions. Test-pipe implementation header file 1 first is # include: # Include "cd_data.h"# Include "cliserv. H" 2. We define some values

In the morning I heard people say that part of a program is a kernel state, the other part is User state, how it needs to be. Suddenly wanted to know, the user's program can call the kernel function directly. (now suddenly found that the problem is

Transferred from: http://blog.csdn.net/jason314/article/details/5640969First, Fork Introduction knowledgeA process, including code, data, and resources assigned to the process. The fork () function creates a process that is almost identical to the