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/* libc/sys/linux/ipc.c - IPC semaphore and message queue functions */

/* Copyright 2002, Red Hat Inc. */

#include <sys/types.h>

#include <sys/sem.h>

#include <sys/msg.h>

#include <stdarg.h>

#include <machine/syscall.h>

#define IPC_64 0x100

#define IPCOP_semop     1

#define IPCOP_semget    2

#define IPCOP_semctl    3

#define IPCOP_msgsnd    11

#define IPCOP_msgrcv    12

#define IPCOP_msgget    13

#define IPCOP_msgctl    14

static _syscall5(int,ipc,int,op,int,arg1,int,arg2,int,arg3,void *,arg4);

int

semget (key_t key, int nsems, int semflgs)

{

  return __libc_ipc(IPCOP_semget, (int)key, nsems, semflgs, NULL);

}

int

semctl (int semid, int semnum, int cmd, ...)

{

  va_list va;

  union semun {

    int val;

    struct semid_ds *buf;

    unsigned short  *array;

  } arg;

  va_start (va, cmd);

  arg = va_arg (va, union semun);

  va_end (va);

  return __libc_ipc(IPCOP_semctl, semid, semnum, cmd | IPC_64, &arg);

}

int

semop (int semid, struct sembuf *sops, size_t nsems)

{

  return __libc_ipc(IPCOP_semop, semid, (int)nsems, 0, sops);

}

int

msgget (key_t key, int msgflg)

{

  return __libc_ipc(IPCOP_msgget, (int)key, msgflg, 0, NULL);

}

int

msgctl (int msqid, int cmd, struct msqid_ds *buf)

{

  return __libc_ipc(IPCOP_msgctl, msqid, cmd | IPC_64, 0, buf);

}

int

msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)

{

  return __libc_ipc(IPCOP_msgsnd, msqid, (int)msgsz, msgflg, (void *)msgp);

}

int

msgrcv (int msqid, void *msgp, size_t msgsz, long int msgtyp, int msgflg)

{

  /* last argument must contain multiple args */

  struct {

    void *msgp;

    long int msgtyp;

  } args;

  args.msgp = msgp;

  args.msgtyp = msgtyp;

  return (ssize_t)__libc_ipc(IPCOP_msgrcv, msqid, (int)msgsz, msgflg, &args);

}