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authorThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
committerThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
commitf07a4c844da9f0ecae5bbee1ab94be56505f26f7 (patch)
tree12b07c7e578fc1a5f53dbfde2632408491ff2a70 /ipc/ipc_mqueue.h
Initial source
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diff --git a/ipc/ipc_mqueue.h b/ipc/ipc_mqueue.h
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+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ * File: ipc/ipc_mqueue.h
+ * Author: Rich Draves
+ * Date: 1989
+ *
+ * Definitions for message queues.
+ */
+
+#ifndef _IPC_IPC_MQUEUE_H_
+#define _IPC_IPC_MQUEUE_H_
+
+#include <mach/message.h>
+#include <kern/assert.h>
+#include <kern/lock.h>
+#include <kern/macro_help.h>
+#include <ipc/ipc_kmsg.h>
+#include <ipc/ipc_thread.h>
+
+typedef struct ipc_mqueue {
+ decl_simple_lock_data(, imq_lock_data)
+ struct ipc_kmsg_queue imq_messages;
+ struct ipc_thread_queue imq_threads;
+} *ipc_mqueue_t;
+
+#define IMQ_NULL ((ipc_mqueue_t) 0)
+
+#define imq_lock_init(mq) simple_lock_init(&(mq)->imq_lock_data)
+#define imq_lock(mq) simple_lock(&(mq)->imq_lock_data)
+#define imq_lock_try(mq) simple_lock_try(&(mq)->imq_lock_data)
+#define imq_unlock(mq) simple_unlock(&(mq)->imq_lock_data)
+
+extern void
+ipc_mqueue_init(/* ipc_mqueue_t */);
+
+extern void
+ipc_mqueue_move(/* ipc_mqueue_t, ipc_mqueue_t, ipc_port_t */);
+
+extern void
+ipc_mqueue_changed(/* ipc_mqueue_t, mach_msg_return_t */);
+
+extern mach_msg_return_t
+ipc_mqueue_send(/* ipc_kmsg_t, mach_msg_option_t, mach_msg_timeout_t */);
+
+#define IMQ_NULL_CONTINUE ((void (*)()) 0)
+
+extern mach_msg_return_t
+ipc_mqueue_receive(/* ipc_mqueue_t, mach_msg_option_t,
+ mach_msg_size_t, mach_msg_timeout_t,
+ boolean_t, void (*)(),
+ ipc_kmsg_t *, mach_port_seqno_t * */);
+
+/*
+ * extern void
+ * ipc_mqueue_send_always(ipc_kmsg_t);
+ *
+ * Unfortunately, to avoid warnings/lint about unused variables
+ * when assertions are turned off, we need two versions of this.
+ */
+
+#include <kern/assert.h>
+
+#if MACH_ASSERT
+
+#define ipc_mqueue_send_always(kmsg) \
+MACRO_BEGIN \
+ mach_msg_return_t mr; \
+ \
+ mr = ipc_mqueue_send((kmsg), MACH_SEND_ALWAYS, \
+ MACH_MSG_TIMEOUT_NONE); \
+ assert(mr == MACH_MSG_SUCCESS); \
+MACRO_END
+
+#else MACH_ASSERT
+
+#define ipc_mqueue_send_always(kmsg) \
+MACRO_BEGIN \
+ (void) ipc_mqueue_send((kmsg), MACH_SEND_ALWAYS, \
+ MACH_MSG_TIMEOUT_NONE); \
+MACRO_END
+
+#endif /* MACH_ASSERT */
+
+#endif /* _IPC_IPC_MQUEUE_H_ */