--- a/epoc32/include/stdapis/sys/msg.h Tue Nov 24 13:55:44 2009 +0000
+++ b/epoc32/include/stdapis/sys/msg.h Tue Mar 16 16:12:26 2010 +0000
@@ -1,1 +1,198 @@
-msg.h
+/* $FreeBSD: src/sys/sys/msg.h,v 1.20 2005/01/07 02:29:23 imp Exp $ */
+/* $NetBSD: msg.h,v 1.4 1994/06/29 06:44:43 cgd Exp $ */
+
+/*-
+ * SVID compatible msg.h file
+ *
+ * Author: Daniel Boulet
+ *
+ *© Portions copyright (c) 2006 Nokia Corporation. All rights reserved.
+ * Copyright 1993 Daniel Boulet and RTMX Inc.
+ *
+ * This system call was implemented by Daniel Boulet under contract from RTMX.
+ *
+ * Redistribution and use in source forms, with and without modification,
+ * are permitted provided that this entire comment appears intact.
+ *
+ * Redistribution in binary form may occur without any restrictions.
+ * Obviously, it would be nice if you gave credit where credit is due
+ * but requiring it would be too onerous.
+ *
+ * This software is provided ``AS IS'' without any warranties of any kind.
+ */
+
+#ifndef _SYS_MSG_H_
+#define _SYS_MSG_H_
+
+#include <sys/cdefs.h>
+#include <sys/_types.h>
+#include <sys/ipc.h>
+
+/*
+ * The MSG_NOERROR identifier value, the msqid_ds struct and the msg struct
+ * are as defined by the SV API Intel 386 Processor Supplement.
+ */
+
+#define MSG_NOERROR 010000 /* don't complain about too long msgs */
+
+typedef unsigned long msglen_t;
+typedef unsigned long msgqnum_t;
+
+#ifndef _PID_T_DECLARED
+typedef __pid_t pid_t;
+#define _PID_T_DECLARED
+#endif
+
+#ifndef _SIZE_T_DECLARED
+typedef __size_t size_t;
+#define _SIZE_T_DECLARED
+#endif
+
+#ifndef _SSIZE_T_DECLARED
+typedef __ssize_t ssize_t;
+#define _SSIZE_T_DECLARED
+#endif
+
+#ifndef _TIME_T_DECLARED
+typedef __time_t time_t;
+#define _TIME_T_DECLARED
+#endif
+
+/*
+ * XXX there seems to be no prefix reserved for this header, so the name
+ * "msg" in "struct msg" and the names of all of the nonstandard members
+ * (mainly "msg_pad*) are namespace pollution.
+ */
+
+struct msqid_ds {
+ struct ipc_perm msg_perm; /* msg queue permission bits */
+ struct msg *msg_first; /* first message in the queue */
+ struct msg *msg_last; /* last message in the queue */
+ msglen_t msg_cbytes; /* number of bytes in use on the queue */
+ msgqnum_t msg_qnum; /* number of msgs in the queue */
+ msglen_t msg_qbytes; /* max # of bytes on the 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() */
+ long msg_pad1;
+ time_t msg_rtime; /* time of last msgrcv() */
+ long msg_pad2;
+ time_t msg_ctime; /* time of last msgctl() */
+ long msg_pad3;
+ long msg_pad4[4];
+};
+
+#if __BSD_VISIBLE
+/*
+ * Structure describing a message. The SVID doesn't suggest any
+ * particular name for this structure. There is a reference in the
+ * msgop man page that reads "The structure mymsg is an example of what
+ * this user defined buffer might look like, and includes the following
+ * members:". This sentence is followed by two lines equivalent
+ * to the mtype and mtext field declarations below. It isn't clear
+ * if "mymsg" refers to the name of the structure type or the name of an
+ * instance of the structure...
+ */
+struct mymsg {
+ long mtype; /* message type (+ve integer) */
+ char mtext[1]; /* message body */
+};
+#endif
+
+#ifdef _KERNEL
+
+struct msg {
+ struct msg *msg_next; /* next msg in the chain */
+ long msg_type; /* type of this message */
+ /* >0 -> type of this message */
+ /* 0 -> free header */
+ u_short msg_ts; /* size of this message */
+ short msg_spot; /* location of start of msg in buffer */
+ struct label *label; /* MAC Framework label */
+};
+
+/*
+ * Based on the configuration parameters described in an SVR2 (yes, two)
+ * config(1m) man page.
+ *
+ * Each message is broken up and stored in segments that are msgssz bytes
+ * long. For efficiency reasons, this should be a power of two. Also,
+ * it doesn't make sense if it is less than 8 or greater than about 256.
+ * Consequently, msginit in kern/sysv_msg.c checks that msgssz is a power of
+ * two between 8 and 1024 inclusive (and panic's if it isn't).
+ */
+struct msginfo {
+ int msgmax, /* max chars in a message */
+ msgmni, /* max message queue identifiers */
+ msgmnb, /* max chars in a queue */
+ msgtql, /* max messages in system */
+ msgssz, /* size of a message segment (see notes above) */
+ msgseg; /* number of message segments */
+};
+extern struct msginfo msginfo;
+
+/*
+ * Kernel wrapper for the user-level structure.
+ */
+struct msqid_kernel {
+ /*
+ * Data structure exposed to user space.
+ */
+ struct msqid_ds u;
+
+ /*
+ * Kernel-private components of the message queue.
+ */
+ struct label *label; /* MAC label */
+};
+
+#else /* !_KERNEL */
+
+/* Template for struct to be used as argument for `msgsnd' and `msgrcv'. */
+struct msgbuf
+ {
+ long int mtype; /* type of received/sent message */
+ char mtext[1]; /* text of the message */
+ };
+
+// FUNCTION PROTOTYPES
+
+
+// FORWARD DECLARATIONS
+
+
+// CLASS/STRUCT/FUNCTION DECLARATION
+__BEGIN_DECLS
+
+/*
+* Get the message queue identifier using the IPC key generated by ftok.
+*/
+
+IMPORT_C int msgget(key_t key, int msgflg);
+
+/*
+* Used to send a message to the queue associated with the message identifier specified by msqid.
+*/
+
+IMPORT_C int msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg);
+
+/*
+* Reads a message from the queue associated with the message queue identifier.
+*/
+
+IMPORT_C ssize_t msgrcv(int msqid, void* msgp, size_t msgsz, long msgtyp, int msgflg);
+
+/*
+* Provides an interface to control message queue and control operations as specified by cmd.
+*/
+
+IMPORT_C int msgctl(int msqid, int cmd, struct msqid_ds* buf);
+
+
+__END_DECLS
+
+#endif /* !_KERNEL */
+
+#endif // _SYS_MSG_H_
+
+// End of File