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135 lines
3.8 KiB
C++
135 lines
3.8 KiB
C++
/* Remote notification in GDB protocol
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Copyright (C) 1988-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef REMOTE_NOTIF_H
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#define REMOTE_NOTIF_H
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#include <list>
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#include <memory>
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/* An event of a type of async remote notification. */
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struct notif_event
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{
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virtual ~notif_event ()
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{
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}
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};
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/* A unique pointer holding a notif_event. */
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typedef std::unique_ptr<notif_event> notif_event_up;
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/* ID of the notif_client. */
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enum REMOTE_NOTIF_ID
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{
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REMOTE_NOTIF_STOP = 0,
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REMOTE_NOTIF_LAST,
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};
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struct remote_target;
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/* A client to a sort of async remote notification. */
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struct notif_client
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{
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/* The name of notification packet. */
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const char *name;
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/* The packet to acknowledge a previous reply. */
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const char *ack_command;
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/* Parse BUF to get the expected event and update EVENT. This
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function may throw exception if contents in BUF is not the
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expected event. */
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void (*parse) (remote_target *remote,
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struct notif_client *self, const char *buf,
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struct notif_event *event);
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/* Send field <ack_command> to remote, and do some checking. If
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something wrong, throw an exception. */
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void (*ack) (remote_target *remote,
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struct notif_client *self, const char *buf,
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struct notif_event *event);
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/* Check this notification client can get pending events in
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'remote_notif_process'. */
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int (*can_get_pending_events) (remote_target *remote,
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struct notif_client *self);
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/* Allocate an event. */
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notif_event_up (*alloc_event) ();
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/* Id of this notif_client. */
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const enum REMOTE_NOTIF_ID id;
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};
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/* State on remote async notification. */
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struct remote_notif_state
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{
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remote_notif_state () = default;
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~remote_notif_state ();
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DISABLE_COPY_AND_ASSIGN (remote_notif_state);
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/* The remote target. */
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remote_target *remote;
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/* Notification queue. */
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std::list<notif_client *> notif_queue;
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/* Asynchronous signal handle registered as event loop source for when
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the remote sent us a notification. The registered callback
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will do a ACK sequence to pull the rest of the events out of
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the remote side into our event queue. */
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struct async_event_handler *get_pending_events_token;
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/* One pending event for each notification client. This is where we
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keep it until it is acknowledged. When there is a notification
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packet, parse it, and create an object of 'struct notif_event' to
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assign to it. This field is unchanged until GDB starts to ack
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this notification (which is done by
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remote.c:remote_notif_pending_replies). */
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struct notif_event *pending_event[REMOTE_NOTIF_LAST] {};
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};
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void remote_notif_ack (remote_target *remote, notif_client *nc,
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const char *buf);
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struct notif_event *remote_notif_parse (remote_target *remote,
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notif_client *nc,
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const char *buf);
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void handle_notification (struct remote_notif_state *notif_state,
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const char *buf);
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void remote_notif_process (struct remote_notif_state *state,
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struct notif_client *except);
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remote_notif_state *remote_notif_state_allocate (remote_target *remote);
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extern struct notif_client notif_client_stop;
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extern bool notif_debug;
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#endif /* REMOTE_NOTIF_H */
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