posix shared memory example

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Linux inter-process communication (IPC) programming practices (8) use of shared memory-POSIX shared memory (API)

Linux inter-process communication (IPC) programming practices (8) use of shared memory-POSIX shared memory (API) 1. Posix provides two methods to share memory areas between unrelated processes: (1) memory ing file: open the function first, and then

POSIX shared memory __linux of Linux IPC

Introduction: System v Shared Memory and shared file mappings allow unrelated processes to share memory areas for IPC communication. But there are some drawbacks to these two technologies: 1. The System V Shared memory model uses keys and

POSIX multithreading-Shared memory

Http://www.cnblogs.com/dubingsky/archive/2009/06/18/1505841.html One, what is the shared memory area The shared memory area is the fastest available form of IPC. It allows multiple unrelated processes to access the same part of the logical memory.

POSIX shared memory and functions in Linux Network Programming

The previous section introduced the knowledge about System V shared memory. Now let's take a look at POSIX shared memory and functions. Shared Memory is simply a real physical memory area. Some functions can be used to map this area to the address

POSIX and ANSI C

Document directory Standard (ansi c, POSIX, svid, xpg ,...) Online Documentation (man, info, how-,...) Storage location of library and header files Standard (ansi c, POSIX, svid, xpg ,...) Ansi c: This is the C language standard set by ANSI

Linux IPC Practice (TEN)--posix shared memory

1. Create/acquire a shared memory#include #include / * for Mode constants */#include / * for O_* Constants */int Shm_open (const char *name, int oflag, mode_t mode);Parameters:Name: Shared memory names; Oflag: With the Open

POSIX shared memory usage and code examples for Linux interprocess communication

POSIX shared memory has two ways of sharing memory between non-affinity processes:1). Use a memory-mapped file, opened by the Open function, and the MMAP function maps the returned file descriptor to a file in the current process space.2). Using the

Linux Programming Learning notes----System V process communication (shared memory)

Reprint Please specify the Source: http://blog.csdn.net/suool/article/details/38515863shared memory can be described as a mapping of an area ( segment) of memory that can be shared by more processes. This is the fastest form of the IPC mechanism

UNIX interprocess Communication (IPC) concept (Posix,system V IPC)

IPC (inter-process communication, interprocess communication) can have three ways of sharing information (along with the file system, with the kernel, with shared memory). (Of course, although it is interprocess communication, it can also be

Linux Process Communication-shared memory

The Unified Call uses MMAP () to map a common file to implement shared memory. System V maps files in the SHM of a special file system to implement shared memory communication between processes. That is to say, each shared memory area corresponds to

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