haiku/headers/posix/sys/msg.h

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/*
* Copyright 2008, Haiku Inc. All Rights Reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef _SYS_MSG_H
#define _SYS_MSG_H
#include <sys/cdefs.h>
#include <sys/ipc.h>
#include <sys/types.h>
typedef unsigned long msgqnum_t;
typedef unsigned long msglen_t;
/* No error if big message */
#define MSG_NOERROR 010000
struct msqid_ds {
struct ipc_perm msg_perm; /* Operation permission structure */
msgqnum_t msg_qnum; /* Number of messages currently on queue */
msglen_t msg_qbytes; /* Max number of bytes allowed on queue */
pid_t msg_lspid; /* PID of last msgsnd */
pid_t msg_lrpid; /* PID of last msgrcv */
time_t msg_stime; /* Time of last msgsnd */
time_t msg_rtime; /* Time of last msgrcv */
time_t msg_ctime; /* Time of last change */
};
/* Structure used to send/receive a message */
struct msgbuf {
long mtype; /* message type */
char mtext[1]; /* message text */
};
__BEGIN_DECLS
int msgctl(int, int, struct msqid_ds *);
int msgget(key_t, int);
ssize_t msgrcv(int, void *, size_t, long, int);
int msgsnd(int, const void *, size_t, int);
__END_DECLS
#endif /* _SYS_MSG_H */