gdb/

2012-12-15  Yao Qi  <yao@codesourcery.com>

	* Makefile.in (REMOTE_OBS): Add "remote-notif.o".
	(SFILES): Add "remote-notif.c".
	(HFILES_NO_SRCDIR): Add "remote-notif.h" and "common/queue.h".
	* remote-notif.c: New.  Factored out from remote.c.
	* remote-notif.h: New.
	* remote.c: Include "remote-notif.h".
	(stop_reply_xmalloc, do_stop_reply_xfree):
	(remote_parse_stop_reply, remote_get_pending_stop_replies):
	(remote_async_get_pending_events_handler): Remove declarations.
	(remote_parse_stop_reply): Declare.
	(pending_stop_reply): Remove.
	(remote_async_get_pending_events_token): Move to
	remote-notif.c.
	(remote_close): Replace 'delete_async_event_handler' with
	remote_notif_unregister_async_event_handler.
	Don't call discard_pending_stop_replies.
	(remote_start_remote): Replace code with remote_notif_parse
	and remote_notif_get_pending_replies.
	(remote_open_1): Replace 'create_async_event_handler' with
	remote_notif_register_async_event_handler.
	(extended_remote_attach_1): Call remote_notif_parse and
	notif_stop_reply_push.
	(struct stop_reply) <next>: Remove.
	<base>: New field.
	Callers update.
	(stop_reply_queue): Change its type.
	(stop_reply_xmalloc, do_stop_reply_xfree): Remove.
	(remote_notif_remove_all): New.
	(discard_pending_stop_replies): Update.
	(remote_notif_stop_ack, stop_reply_dtr): New.
	(remote_notif_stop_alloc_event): New.
	(notif_client_stop): New variable.
	(stop_reply_match_ptid, stop_reply_match_ptid_and_ws: New.
	(queued_stop_reply, peek_stop_reply): Adjust.
	(remote_get_pending_stop_replies): Rename to
	remote_notif_get_pending_events.
	(handle_notification): Move to remote-notif.c.
	(remote_async_get_pending_events_handler): Likewise.
	(remote_wait_as): Adjust to call remote_notif_parse.
	Call 'getpkt_or_notif_sane' instead of 'getpkt_sane'.
	Return minus_one_ptid early if gets a notification.
	(remote_wait): Call QUEUE_is_empty (notif_reply_p).
	(_initialize_remote): Call QUEUE_alloc.  Update caller.
	(remote_resume): Call 'remote_notif_process' in all-stop mode.
	* remote.h: Include "remote-notif.h".
	(remote_notif_get_pending_replies): Declare.

1 files changed, 85 insertions, 0 deletions

diff --git a/gdb/remote-notif.h b/gdb/remote-notif.h
new file mode 100644
index 0000000..92c4bb6
--- /dev/null
+++ b/gdb/remote-notif.h
@@ -0,0 +1,85 @@
+/* Remote notification in GDB protocol
+
+   Copyright (C) 1988-2012 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef REMOTE_NOTIF_H
+#define REMOTE_NOTIF_H
+
+#include "queue.h"
+
+/* An event of a type of async remote notification.  */
+
+struct notif_event
+{
+  /* Destructor.  Release everything from SELF, but not SELF
+     itself.  */
+  void (*dtr) (struct notif_event *self);
+};
+
+/* A client to a sort of async remote notification.  */
+
+typedef struct notif_client
+{
+  /* The name of notification packet.  */
+  const char *name;
+
+  /* The packet to acknowledge a previous reply.  */
+  const char *ack_command;
+
+  /* Parse BUF to get the expected event and update EVENT.  This
+     function may throw exception if contents in BUF is not the
+     expected event.  */
+  void (*parse) (struct notif_client *self, char *buf,
+		 struct notif_event *event);
+
+  /* Send field <ack_command> to remote, and do some checking.  If
+     something wrong, throw an exception.  */
+  void (*ack) (struct notif_client *self, char *buf,
+	       struct notif_event *event);
+
+  /* Check this notification client can get pending events in
+     'remote_notif_process'.  */
+  int (*can_get_pending_events) (struct notif_client *self);
+
+  /* Allocate an event.  */
+  struct notif_event *(*alloc_event) (void);
+
+  /* One pending event.  This is where we keep it until it is
+     acknowledged.  When there is a notification packet, parse it,
+     and create an object of 'struct notif_event' to assign to
+     it.  This field is unchanged until GDB starts to ack this
+     notification (which is done by
+     remote.c:remote_notif_pending_replies).  */
+  struct notif_event *pending_event;
+} *notif_client_p;
+
+void remote_notif_ack (struct notif_client *nc, char *buf);
+struct notif_event *remote_notif_parse (struct notif_client *nc,
+					char *buf);
+
+void handle_notification (char *buf);
+
+void remote_notif_register_async_event_handler (void);
+void remote_notif_unregister_async_event_handler (void);
+
+void remote_notif_process (struct notif_client *except);
+extern struct notif_client notif_client_stop;
+
+extern unsigned int notif_debug;
+
+#endif /* REMOTE_NOTIF_H */