1 /* Copyright (C) 1995, 1996, 1997, 1998, 2000 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_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/wordsize.h> 24 25 /* Flags for `semop'. */ 26 #define SEM_UNDO 0x1000 /* undo the operation on exit */ 27 28 /* Commands for `semctl'. */ 29 #define GETPID 11 /* get sempid */ 30 #define GETVAL 12 /* get semval */ 31 #define GETALL 13 /* get all semval's */ 32 #define GETNCNT 14 /* get semncnt */ 33 #define GETZCNT 15 /* get semzcnt */ 34 #define SETVAL 16 /* set semval */ 35 #define SETALL 17 /* set all semval's */ 36 37 38 /* Data structure describing a set of semaphores. */ 39 struct semid_ds 40 { 41 struct ipc_perm sem_perm; /* operation permission struct */ 42 #if defined(__UCLIBC_USE_TIME64__) 43 unsigned long int __sem_otime_internal_1; 44 unsigned long int __sem_otime_internal_2; 45 #else 46 __time_t sem_otime; /* last semop() time */ 47 #endif 48 #if (__WORDSIZE == 32 && !defined(__ARC64_ARCH32__) && !defined(__arc__) && !defined(__arm__) && !defined(__or1k__) && !defined(__xtensa__) && !defined(__riscv)) || \ 49 ((defined(__ARC64_ARCH32__) || defined(__arc__) || defined(__arm__) || defined(__or1k__) || defined(__xtensa__) || defined(__riscv)) && !defined(__UCLIBC_USE_TIME64__)) 50 unsigned long int __uclibc_unused1; 51 #endif 52 #if defined(__UCLIBC_USE_TIME64__) 53 unsigned long int __sem_ctime_internal_1; 54 unsigned long int __sem_ctime_internal_2; 55 #else 56 __time_t sem_ctime; /* last time changed by semctl() */ 57 #endif 58 #if (__WORDSIZE == 32 && !defined(__ARC64_ARCH32__) && !defined(__arc__) && !defined(__arm__) && !defined(__or1k__) && !defined(__xtensa__) && !defined(__riscv)) || \ 59 ((defined(__ARC64_ARCH32__) || defined(__arc__) || defined(__arm__) || defined(__or1k__) || defined(__xtensa__) || defined(__riscv)) && !defined(__UCLIBC_USE_TIME64__)) 60 unsigned long int __uclibc_unused2; 61 #endif 62 unsigned long int sem_nsems; /* number of semaphores in set */ 63 #if defined(__UCLIBC_USE_TIME64__) 64 __time_t sem_otime; /* last semop() time */ 65 __time_t sem_ctime; /* last time changed by semctl() */ 66 #endif 67 unsigned long int __uclibc_unused3; 68 unsigned long int __uclibc_unused4; 69 }; 70 71 /* The user should define a union like the following to use it for arguments 72 for `semctl'. 73 74 union semun 75 { 76 int val; <= value for SETVAL 77 struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET 78 unsigned short int *array; <= array for GETALL & SETALL 79 struct seminfo *__buf; <= buffer for IPC_INFO 80 }; 81 82 Previous versions of this file used to define this union but this is 83 incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether 84 one must define the union or not. */ 85 #define _SEM_SEMUN_UNDEFINED 1 86 87 #ifdef __USE_MISC 88 89 /* ipcs ctl cmds */ 90 # define SEM_STAT 18 91 # define SEM_INFO 19 92 93 struct seminfo 94 { 95 int semmap; 96 int semmni; 97 int semmns; 98 int semmnu; 99 int semmsl; 100 int semopm; 101 int semume; 102 int semusz; 103 int semvmx; 104 int semaem; 105 }; 106 107 #endif /* __USE_MISC */ 108