1c3aac50fSPeter Wemm /* $FreeBSD$ */ 23d903220SDoug Rabson /* $NetBSD: sem.h,v 1.5 1994/06/29 06:45:15 cgd Exp $ */ 33d903220SDoug Rabson 43d903220SDoug Rabson /* 53d903220SDoug Rabson * SVID compatible sem.h file 63d903220SDoug Rabson * 73d903220SDoug Rabson * Author: Daniel Boulet 83d903220SDoug Rabson */ 93d903220SDoug Rabson 103d903220SDoug Rabson #ifndef _SYS_SEM_H_ 113d903220SDoug Rabson #define _SYS_SEM_H_ 123d903220SDoug Rabson 133d903220SDoug Rabson #include <sys/ipc.h> 143d903220SDoug Rabson 15ab063af9SPeter Wemm struct sem; 163d903220SDoug Rabson 173d903220SDoug Rabson struct semid_ds { 183d903220SDoug Rabson struct ipc_perm sem_perm; /* operation permission struct */ 193d903220SDoug Rabson struct sem *sem_base; /* pointer to first semaphore in set */ 20*7b594d2aSJens Schweikhardt unsigned short sem_nsems; /* number of sems in set */ 213d903220SDoug Rabson time_t sem_otime; /* last operation time */ 223d903220SDoug Rabson long sem_pad1; /* SVABI/386 says I need this here */ 233d903220SDoug Rabson time_t sem_ctime; /* last change time */ 243d903220SDoug Rabson /* Times measured in secs since */ 253d903220SDoug Rabson /* 00:00:00 GMT, Jan. 1, 1970 */ 263d903220SDoug Rabson long sem_pad2; /* SVABI/386 says I need this here */ 273d903220SDoug Rabson long sem_pad3[4]; /* SVABI/386 says I need this here */ 283d903220SDoug Rabson }; 293d903220SDoug Rabson 303d903220SDoug Rabson /* 313d903220SDoug Rabson * semop's sops parameter structure 323d903220SDoug Rabson */ 333d903220SDoug Rabson struct sembuf { 34*7b594d2aSJens Schweikhardt unsigned short sem_num; /* semaphore # */ 353d903220SDoug Rabson short sem_op; /* semaphore operation */ 363d903220SDoug Rabson short sem_flg; /* operation flags */ 373d903220SDoug Rabson }; 383d903220SDoug Rabson #define SEM_UNDO 010000 393d903220SDoug Rabson 403d903220SDoug Rabson /* 413d903220SDoug Rabson * semctl's arg parameter structure 423d903220SDoug Rabson */ 433d903220SDoug Rabson union semun { 443d903220SDoug Rabson int val; /* value for SETVAL */ 453d903220SDoug Rabson struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */ 46*7b594d2aSJens Schweikhardt unsigned short *array; /* array for GETALL & SETALL */ 473d903220SDoug Rabson }; 483d903220SDoug Rabson 493d903220SDoug Rabson /* 503d903220SDoug Rabson * commands for semctl 513d903220SDoug Rabson */ 523d903220SDoug Rabson #define GETNCNT 3 /* Return the value of semncnt {READ} */ 533d903220SDoug Rabson #define GETPID 4 /* Return the value of sempid {READ} */ 543d903220SDoug Rabson #define GETVAL 5 /* Return the value of semval {READ} */ 553d903220SDoug Rabson #define GETALL 6 /* Return semvals into arg.array {READ} */ 563d903220SDoug Rabson #define GETZCNT 7 /* Return the value of semzcnt {READ} */ 573d903220SDoug Rabson #define SETVAL 8 /* Set the value of semval to arg.val {ALTER} */ 583d903220SDoug Rabson #define SETALL 9 /* Set semvals from arg.array {ALTER} */ 59d528be2bSMichael Reifenberger #define SEM_STAT 10 /* Like IPC_STAT but treats semid as sema-index */ 60d528be2bSMichael Reifenberger #define SEM_INFO 11 /* Like IPC_INFO but treats semid as sema-index */ 613d903220SDoug Rabson 62aed5ecb7SJoerg Wunsch /* 63aed5ecb7SJoerg Wunsch * Permissions 64aed5ecb7SJoerg Wunsch */ 6591a701cdSMichael Reifenberger #define SEM_A IPC_W /* alter permission */ 6691a701cdSMichael Reifenberger #define SEM_R IPC_R /* read permission */ 67aed5ecb7SJoerg Wunsch 68664a31e4SPeter Wemm #ifdef _KERNEL 693d903220SDoug Rabson 703d903220SDoug Rabson /* 713d903220SDoug Rabson * semaphore info struct 723d903220SDoug Rabson */ 733d903220SDoug Rabson struct seminfo { 743d903220SDoug Rabson int semmap, /* # of entries in semaphore map */ 753d903220SDoug Rabson semmni, /* # of semaphore identifiers */ 763d903220SDoug Rabson semmns, /* # of semaphores in system */ 773d903220SDoug Rabson semmnu, /* # of undo structures in system */ 783d903220SDoug Rabson semmsl, /* max # of semaphores per id */ 793d903220SDoug Rabson semopm, /* max # of operations per semop call */ 803d903220SDoug Rabson semume, /* max # of undo entries per process */ 813d903220SDoug Rabson semusz, /* size in bytes of undo structure */ 823d903220SDoug Rabson semvmx, /* semaphore maximum value */ 833d903220SDoug Rabson semaem; /* adjust on exit max value */ 843d903220SDoug Rabson }; 85789668e2SDavid Greenman extern struct seminfo seminfo; 863d903220SDoug Rabson 873d903220SDoug Rabson /* internal "mode" bits */ 883d903220SDoug Rabson #define SEM_ALLOC 01000 /* semaphore is allocated */ 893d903220SDoug Rabson #define SEM_DEST 02000 /* semaphore will be destroyed on last detach */ 903d903220SDoug Rabson 913d903220SDoug Rabson /* 92a353d785SJoerg Wunsch * Process sem_undo vectors at proc exit. 93a353d785SJoerg Wunsch */ 94789f12feSAlfred Perlstein void semexit(struct proc *p); 95664a31e4SPeter Wemm #endif /* _KERNEL */ 963d903220SDoug Rabson 97664a31e4SPeter Wemm #ifndef _KERNEL 983d903220SDoug Rabson #include <sys/cdefs.h> 993beb3270SAlfred Perlstein #include <sys/_types.h> 1003beb3270SAlfred Perlstein 1013beb3270SAlfred Perlstein #ifndef _SIZE_T_DECLARED 1023beb3270SAlfred Perlstein typedef __size_t size_t; 1033beb3270SAlfred Perlstein #define _SIZE_T_DECLARED 1043beb3270SAlfred Perlstein #endif 1053beb3270SAlfred Perlstein 1063beb3270SAlfred Perlstein #ifndef _PID_T_DECLARED 1073beb3270SAlfred Perlstein typedef __pid_t pid_t; 1083beb3270SAlfred Perlstein #define _PID_T_DECLARED 1093beb3270SAlfred Perlstein #endif 1103d903220SDoug Rabson 1113d903220SDoug Rabson __BEGIN_DECLS 112789f12feSAlfred Perlstein int semsys(int, ...); 113789f12feSAlfred Perlstein int semctl(int, int, int, ...); 114789f12feSAlfred Perlstein int semget(key_t, int, int); 1153beb3270SAlfred Perlstein int semop(int, struct sembuf *, size_t); 1163d903220SDoug Rabson __END_DECLS 117664a31e4SPeter Wemm #endif /* !_KERNEL */ 1183d903220SDoug Rabson 119*7b594d2aSJens Schweikhardt #endif /* !_SYS_SEM_H_ */ 120