Developing and Porting C and C++ Applications on AIX

References for mmap services

This section includes the following subroutine references:

• “The mmap() subroutine” on page 461

• “The mprotect() subroutine” on page 467

• “The msync() subroutine” on page 469

• “The munmap() subroutine” on page 471

The mmap() subroutine

Maps a file-system object into virtual memory.

Library

Standard C library (libc.a)

Syntax

#include <sys/types.h>
#include <sys/mman.h>
void *mmap(addr, len, prot, flags, filedes, offset)
void *      addr;
size_t      len;
int         prot, flags, filedes;
off_t       offset;

Description

The mmap() subroutine creates a new mapped file or anonymous memory region by establishing a mapping between a process-address space and a file-system object. Care needs to be taken when using the mmap() subroutine if the program ...