sysvipc/sys/shm.h

   1 /* Copyright (C) 1995-2016 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _SYS_SHM_H
  19 #define _SYS_SHM_H      1
  20
  21 #include <features.h>
  22
  23 #define __need_size_t
  24 #include <stddef.h>
  25
  26 /* Get common definition of System V style IPC.  */
  27 #include <sys/ipc.h>
  28
  29 /* Get system dependent definition of `struct shmid_ds' and more.  */
  30 #include <bits/shm.h>
  31
  32 /* Define types required by the standard.  */
  33 #define __need_time_t
  34 #include <time.h>
  35
  36 #ifdef __USE_XOPEN
  37 # ifndef __pid_t_defined
  38 typedef __pid_t pid_t;
  39 #  define __pid_t_defined
  40 # endif
  41 #endif  /* X/Open */
  42
  43
  44 __BEGIN_DECLS
  45
  46 /* The following System V style IPC functions implement a shared memory
  47    facility.  The definition is found in XPG4.2.  */
  48
  49 /* Shared memory control operation.  */
  50 extern int shmctl (int __shmid, int __cmd, struct shmid_ds *__buf) __THROW;
  51
  52 /* Get shared memory segment.  */
  53 extern int shmget (key_t __key, size_t __size, int __shmflg) __THROW;
  54
  55 /* Attach shared memory segment.  */
  56 extern void *shmat (int __shmid, const void *__shmaddr, int __shmflg)
  57      __THROW;
  58
  59 /* Detach shared memory segment.  */
  60 extern int shmdt (const void *__shmaddr) __THROW;
  61
  62 __END_DECLS
  63
  64 #endif /* sys/shm.h */