1 /* Copyright (C) 1995-2022 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 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _SYS_SEM_H 19 # error "Never include <bits/sem.h> directly; use <sys/sem.h> instead." 20 #endif 21 22 #include <sys/types.h> 23 #include <bits/timesize.h> 24 #include <bits/types/struct_semid_ds.h> 25 #include <bits/types/struct_semid64_ds.h> 26 27 /* Flags for `semop'. */ 28 #define SEM_UNDO 0x1000 /* undo the operation on exit */ 29 30 /* Commands for `semctl'. */ 31 #define GETPID 11 /* get sempid */ 32 #define GETVAL 12 /* get semval */ 33 #define GETALL 13 /* get all semval's */ 34 #define GETNCNT 14 /* get semncnt */ 35 #define GETZCNT 15 /* get semzcnt */ 36 #define SETVAL 16 /* set semval */ 37 #define SETALL 17 /* set all semval's */ 38 39 /* The user should define a union like the following to use it for arguments 40 for `semctl'. 41 42 union semun 43 { 44 int val; <= value for SETVAL 45 struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET 46 unsigned short int *array; <= array for GETALL & SETALL 47 struct seminfo *__buf; <= buffer for IPC_INFO 48 }; 49 50 Previous versions of this file used to define this union but this is 51 incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether 52 one must define the union or not. */ 53 #define _SEM_SEMUN_UNDEFINED 1 54 55 #ifdef __USE_MISC 56 57 /* ipcs ctl cmds */ 58 # define SEM_STAT 18 59 # define SEM_INFO 19 60 # define SEM_STAT_ANY 20 61 62 struct seminfo 63 { 64 int semmap; 65 int semmni; 66 int semmns; 67 int semmnu; 68 int semmsl; 69 int semopm; 70 int semume; 71 int semusz; 72 int semvmx; 73 int semaem; 74 }; 75 76 #endif /* __USE_MISC */ 77