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1998-04-28  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/bits/sem.h: Don't define union semun.
	Define macro _SEM_SEMUN_UNDEFINED instead.
This commit is contained in:
Ulrich Drepper
1998-04-28 14:12:52 +00:00
parent 0088435eee
commit df493c3bef
3 changed files with 23 additions and 10 deletions
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26
sysdeps/unix/sysv/linux/bits/sem.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
/* Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -48,14 +48,22 @@ struct semid_ds
unsigned short int sem_nsems; /* number of semaphores in set */
};
/* Union used for argument for `semctl'. */
union semun
{
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short int *array; /* array for GETALL & SETALL */
struct seminfo *__buf; /* buffer for IPC_INFO */
};
/* The user should define a union like the following to use it for arguments
for `semctl'.
union semun
{
int val; <= value for SETVAL
struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET
unsigned short int *array; <= array for GETALL & SETALL
struct seminfo *__buf; <= buffer for IPC_INFO
};
Previous versions of this file used to define this union but this is
incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether
one must define the unio or not. */
#define _SEM_SEMUN_UNDEFINED 1
#ifdef __USE_MISC