* Adding sys/msg.h header and relative syscalls

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27416 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/sys/msg.h

@@ -0,0 +1,44 @@
+/*
+ * 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 */

src/system/libroot/posix/sys/xsi_msg_queue.cpp

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2008, Haiku Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Salvatore Benedetto <salvatore.benedetto@gmail.com>
+ */
+
+#include <sys/msg.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include <OS.h>
+
+#include <syscall_utils.h>
+#include <syscalls.h>
+
+
+int
+msgctl(int messageQueueID, int command, struct msqid_ds *buffer)
+{
+	RETURN_AND_SET_ERRNO(_kern_xsi_msgctl(messageQueueID, command, buffer));
+}
+
+
+int
+msgget(key_t key, int messageQueueFlags)
+{
+	RETURN_AND_SET_ERRNO(_kern_xsi_msgget(key, messageQueueFlags));
+}
+
+
+ssize_t
+msgrcv(int messageQueueID, void *messagePointer, size_t messageSize,
+	long messageType, int messageFlags)
+{
+	RETURN_AND_SET_ERRNO(_kern_xsi_msgrcv(messageQueueID, messagePointer,
+		messageSize, messageType, messageFlags));
+}
+
+
+int
+msgsnd(int messageQueueID, const void *messagePointer, size_t messageSize,
+	int messageFlags)
+{
+	RETURN_AND_SET_ERRNO(_kern_xsi_msgsnd(messageQueueID, messagePointer,
+		messageSize, messageFlags));
+}