1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/* Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <sys/sem.h>
#include <stddef.h>
#include "ipc.h"
#ifdef L_semctl
/* Return identifier for array of NSEMS semaphores associated with
KEY. */
#include <stdarg.h>
#include <stdlib.h>
/* arg for semctl system calls. */
union semun {
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short *array; /* array for GETALL & SETALL */
struct seminfo *__buf; /* buffer for IPC_INFO */
void *__pad;
};
#ifdef __NR_semctl
#define __NR___semctl __NR_semctl
static inline _syscall4(int, __semctl, int, semid, int, semnum, int, cmd, void *, arg);
#endif
int semctl(int semid, int semnum, int cmd, ...)
{
union semun arg;
va_list ap;
/* Get the argument. */
va_start (ap, cmd);
arg = va_arg (ap, union semun);
va_end (ap);
#ifdef __NR_semctl
return __semctl(semid, semnum, cmd | __IPC_64, arg.__pad);
#else
return __syscall_ipc(IPCOP_semctl, semid, semnum, cmd|__IPC_64, &arg, NULL);
#endif
}
#endif
#ifdef L_semget
/* for definition of NULL */
#include <stdlib.h>
#ifdef __NR_semget
_syscall3(int, semget, key_t, key, int, nsems, int, semflg);
#else
/* Return identifier for array of NSEMS semaphores associated
* with KEY. */
int semget (key_t key, int nsems, int semflg)
{
return __syscall_ipc(IPCOP_semget, key, nsems, semflg, NULL, 0);
}
#endif
#endif
#ifdef L_semop
#ifdef __NR_semop
_syscall3(int, semop, int, semid, struct sembuf *, sops, size_t, nsops);
#else
/* Perform user-defined atomical operation of array of semaphores. */
int semop (int semid, struct sembuf *sops, size_t nsops)
{
return __syscall_ipc(IPCOP_semop, semid, (int) nsops, 0, sops, NULL);
}
#endif
#endif
#ifdef L_semtimedop
#ifdef __NR_semtimedop
_syscall4(int, semtimedop, int, semid, struct sembuf *, sops, size_t, nsops, const struct timespec *, timeout);
#else
int semtimedop(int semid, struct sembuf *sops, size_t nsops,
const struct timespec *timeout)
{
return __syscall_ipc(IPCOP_semtimedop, semid, nsops, 0, sops, timeout);
}
#endif
#endif
|
