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