Current Symbian^3 public API header files (from PDK 3.0.h)
This is the epoc32/include tree with the "platform" subtrees removed, and
all but a selected few mbg and rsg files removed.
/* $FreeBSD: src/sys/sys/sem.h,v 1.29 2004/11/17 13:12:06 rwatson Exp $ */
/* $NetBSD: sem.h,v 1.5 1994/06/29 06:45:15 cgd Exp $ */
/*
*© * © * Portions Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
* SVID compatible sem.h file
*
* Author: Daniel Boulet
*/
#ifndef _SYS_SEM_H_
#define _SYS_SEM_H_
#include <sys/ipc.h>
struct sem {
u_short semval; /* semaphore value */
pid_t sempid; /* process ID of last operation */
u_short semncnt; /* number of processes waiting for semval
to become greater than current value */
u_short semzcnt; /* number of processes waiting for semval
to become 0 */
};
struct semid_ds {
struct ipc_perm sem_perm; /* operation permission struct */
struct sem *sem_base; /* pointer to first semaphore in set */
unsigned short sem_nsems; /* number of sems in set */
time_t sem_otime; /* last operation time */
long sem_pad1; /* SVABI/386 says I need this here */
time_t sem_ctime; /* last change time */
/* Times measured in secs since */
/* 00:00:00 GMT, Jan. 1, 1970 */
long sem_pad2; /* SVABI/386 says I need this here */
long sem_pad3[4]; /* SVABI/386 says I need this here */
};
/*
* semop's sops parameter structure
*/
struct sembuf {
unsigned short sem_num; /* semaphore # */
short sem_op; /* semaphore operation */
short sem_flg; /* operation flags */
};
#define SEM_UNDO 010000
/*
* semctl's arg parameter structure
*/
union semun {
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short *array; /* array for GETALL & SETALL */
};
/*
* commands for semctl
*/
#define GETNCNT 3 /* Return the value of semncnt {READ} */
#define GETPID 4 /* Return the value of sempid {READ} */
#define GETVAL 5 /* Return the value of semval {READ} */
#define GETALL 6 /* Return semvals into arg.array {READ} */
#define GETZCNT 7 /* Return the value of semzcnt {READ} */
#define SETVAL 8 /* Set the value of semval to arg.val {ALTER} */
#define SETALL 9 /* Set semvals from arg.array {ALTER} */
#define SEM_STAT 10 /* Like IPC_STAT but treats semid as sema-index */
#define SEM_INFO 11 /* Like IPC_INFO but treats semid as sema-index */
/*
* Permissions
*/
#define SEM_A IPC_W /* alter permission */
#define SEM_R IPC_R /* read permission */
#ifdef _KERNEL
/*
* semaphore info struct
*/
struct seminfo {
int semmap, /* # of entries in semaphore map */
semmni, /* # of semaphore identifiers */
semmns, /* # of semaphores in system */
semmnu, /* # of undo structures in system */
semmsl, /* max # of semaphores per id */
semopm, /* max # of operations per semop call */
semume, /* max # of undo entries per process */
semusz, /* size in bytes of undo structure */
semvmx, /* semaphore maximum value */
semaem; /* adjust on exit max value */
};
extern struct seminfo seminfo;
/*
* Kernel wrapper for the user-level structure
*/
struct semid_kernel {
struct semid_ds u;
struct label *label; /* MAC framework label */
};
/* internal "mode" bits */
#define SEM_ALLOC 01000 /* semaphore is allocated */
#define SEM_DEST 02000 /* semaphore will be destroyed on last detach */
/*
* Process sem_undo vectors at proc exit.
*/
void semexit(struct proc *p);
#endif /* _KERNEL */
#ifndef _KERNEL
#include <sys/cdefs.h>
#include <sys/_types.h>
#ifndef _SIZE_T_DECLARED
typedef __size_t size_t;
#define _SIZE_T_DECLARED
#endif
#ifndef _PID_T_DECLARED
typedef __pid_t pid_t;
#define _PID_T_DECLARED
#endif
// FUNCTION PROTOTYPES
// FORWARD DECLARATIONS
// CLASS/STRUCT/FUNCTION DECLARATION
__BEGIN_DECLS
/*
* Get semaphore identifier using the IPC key generated by ftok.
*/
IMPORT_C int semget(key_t key, int nsems, int semflg);
/*
* Perform atomically a user-defined array of semaphore operations on the set of
* semaphores associated with the semaphore identifier specified by the argument semid.
*/
IMPORT_C int semop(int semid, struct sembuf *sops, unsigned nsops);
/*
* Provides a variety of semaphore control operations as specified by cmd.
*/
IMPORT_C int semctl(int semid, int semnum, int cmd, ...);
__END_DECLS
#endif // #ifndef _KERNEL
#endif // _SYS_SEM_H_
// End of File