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/* Async events for the GDB event loop.
Copyright (C) 1999-2022 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 ASYNC_EVENT_H
#define ASYNC_EVENT_H
#include "gdbsupport/event-loop.h"
struct async_signal_handler;
struct async_event_handler;
typedef void (sig_handler_func) (gdb_client_data);
/* Type of async event handler callbacks.
DATA is the client data originally passed to create_async_event_handler.
The callback is called when the async event handler is marked. The callback
is responsible for clearing the async event handler if it no longer needs
to be called. */
typedef void (async_event_handler_func) (gdb_client_data);
extern struct async_signal_handler *
create_async_signal_handler (sig_handler_func *proc,
gdb_client_data client_data,
const char *name);
extern void delete_async_signal_handler (struct async_signal_handler **);
/* Call the handler from HANDLER the next time through the event
loop. */
extern void mark_async_signal_handler (struct async_signal_handler *handler);
/* Returns true if HANDLER is marked ready. */
extern int
async_signal_handler_is_marked (struct async_signal_handler *handler);
/* Mark HANDLER as NOT ready. */
extern void clear_async_signal_handler (struct async_signal_handler *handler);
/* Create and register an asynchronous event source in the event loop,
and set PROC as its callback. CLIENT_DATA is passed as argument to
PROC upon its invocation. Returns a pointer to an opaque structure
used to mark as ready and to later delete this event source from
the event loop.
NAME is a user-friendly name for the handler, used in debug statements. The
name is not copied: its lifetime should be at least as long as that of the
handler. */
extern struct async_event_handler *
create_async_event_handler (async_event_handler_func *proc,
gdb_client_data client_data,
const char *name);
/* Remove the event source pointed by HANDLER_PTR created by
CREATE_ASYNC_EVENT_HANDLER from the event loop, and release it. */
extern void
delete_async_event_handler (struct async_event_handler **handler_ptr);
/* Call the handler from HANDLER the next time through the event
loop. */
extern void mark_async_event_handler (struct async_event_handler *handler);
/* Return true if HANDLER is marked. */
extern bool async_event_handler_marked (async_event_handler *handler);
/* Mark the handler (ASYNC_HANDLER_PTR) as NOT ready. */
extern void clear_async_event_handler (struct async_event_handler *handler);
extern void initialize_async_signal_handlers (void);
#endif /* ASYNC_EVENT_H */
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