Originální popis anglicky:
shmdt - XSI shared memory detach operation
Návod, kniha: POSIX Programmer's Manual
#include <sys/shm.h>
int shmdt(const void *
shmaddr);
The
shmdt() function operates on XSI shared memory (see the Base
Definitions volume of IEEE Std 1003.1-2001, Section 3.340,
Shared Memory Object). It is unspecified whether this function interoperates
with the realtime interprocess communication facilities defined in
Realtime .
The
shmdt() function detaches the shared memory segment located at the
address specified by
shmaddr from the address space of the calling
process.
Upon successful completion,
shmdt() shall decrement the value of
shm_nattch in the data structure associated with the shared memory ID
of the attached shared memory segment and return 0.
Otherwise, the shared memory segment shall not be detached,
shmdt() shall
return -1, and
errno shall be set to indicate the error.
The
shmdt() function shall fail if:
- EINVAL
- The value of shmaddr is not the data segment start
address of a shared memory segment.
The following sections are informative.
None.
The POSIX Realtime Extension defines alternative interfaces for interprocess
communication. Application developers who need to use IPC should design their
applications so that modules using the IPC routines described in
XSI
Interprocess Communication can be easily modified to use the alternative
interfaces.
None.
None.
XSI Interprocess Communication ,
Realtime ,
exec() ,
exit() ,
fork() ,
shmat() ,
shmctl() ,
shmget() ,
shm_open() ,
shm_unlink() , the Base
Definitions volume of IEEE Std 1003.1-2001,
<sys/shm.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
