| 1 | /* Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, write to the Free |
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| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 17 | 02111-1307 USA. */ |
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| 18 | |
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| 19 | #ifndef _SYS_SEM_H |
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| 20 | #define _SYS_SEM_H 1 |
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| 21 | |
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| 22 | #include <features.h> |
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| 23 | |
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| 24 | #define __need_size_t |
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| 25 | #include <stddef.h> |
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| 26 | |
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| 27 | /* Get common definition of System V style IPC. */ |
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| 28 | #include <sys/ipc.h> |
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| 29 | |
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| 30 | /* Get system dependent definition of `struct semid_ds' and more. */ |
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| 31 | #include <bits/sem.h> |
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| 32 | |
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| 33 | /* The following System V style IPC functions implement a semaphore |
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| 34 | handling. The definition is found in XPG2. */ |
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| 35 | |
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| 36 | /* Structure used for argument to `semop' to describe operations. */ |
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| 37 | struct sembuf |
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| 38 | { |
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| 39 | unsigned short int sem_num; /* semaphore number */ |
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| 40 | short int sem_op; /* semaphore operation */ |
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| 41 | short int sem_flg; /* operation flag */ |
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| 42 | }; |
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| 43 | |
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| 44 | |
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| 45 | __BEGIN_DECLS |
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| 46 | |
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| 47 | /* Semaphore control operation. */ |
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| 48 | extern int semctl (int __semid, int __semnum, int __cmd, ...) __THROW; |
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| 49 | |
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| 50 | /* Get semaphore. */ |
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| 51 | extern int semget (key_t __key, int __nsems, int __semflg) __THROW; |
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| 52 | |
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| 53 | /* Operate on semaphore. */ |
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| 54 | extern int semop (int __semid, struct sembuf *__sops, size_t __nsops) __THROW; |
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| 55 | |
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| 56 | __END_DECLS |
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| 57 | |
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| 58 | #endif /* sys/sem.h */ |
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