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Shared memory between two c program
Post 302585017 by tafazzi87 on Tuesday 27th of December 2011 05:10:57 AM
12-27-2011
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LEARN ABOUT OSF1
shm_unlink
shm_unlink(3) Library Functions Manual shm_unlink(3) NAME
shm_unlink - Removes a shared memory object created by a call to the shm_open function (P1003.1b) LIBRARY
Realtime Library (librt.so, librt.a) SYNOPSIS
#include <sys/mman.h> int shm_unlink ( const char *name); PARAMETERS
*name Points to the name of the shared memory object. DESCRIPTION
The shm_unlink function removes the name of the shared memory object pointed to by name. If this file descriptor is used by other func- tions, all references to the shared memory object are removed, but content removal is delayed until all open and mapped references to the shared memory object are removed. RETURN VALUES
On a successful call to the shm_unlink function, a value of 0 (zero) is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS
The shm_unlink function fails under the following conditions: [EACCES] Permission to unlink the shared memory object is denied. [ENAMETOOLONG] The length of the name argument exceeds PATH_MAX, or a pathname component is longer than NAME_MAX while _POSIX_NO_TRUNC is in effect. [ENOENT] The named shared memory object does not exist. RELATED INFORMATION
Functions: close(2), mmap(2), munmap(2), shm_open(3) Guide to Realtime Programming delim off shm_unlink(3)