This is the mail archive of the
gdb-patches@sourceware.org
mailing list for the GDB project.
Re: [PATCH 1/6] Move notif_queue to remote_state
- From: Yao Qi <yao at codesourcery dot com>
- To: Pedro Alves <palves at redhat dot com>
- Cc: <gdb-patches at sourceware dot org>
- Date: Fri, 4 Oct 2013 15:35:00 +0800
- Subject: Re: [PATCH 1/6] Move notif_queue to remote_state
- Authentication-results: sourceware.org; auth=none
- References: <1376877311-4135-1-git-send-email-yao at codesourcery dot com> <1376877311-4135-2-git-send-email-yao at codesourcery dot com> <52430B69 dot 4090301 at redhat dot com> <5249293D dot 8050700 at codesourcery dot com> <5249B011 dot 1080207 at redhat dot com> <524B7C65 dot 3030005 at codesourcery dot com> <524BF9FA dot 6010208 at redhat dot com>
On 10/02/2013 06:48 PM, Pedro Alves wrote:
> Since remote_async_get_pending_events_token is no longer a global,
> it doesn't need the "remote_" prefix (or even remote_async_?) anymore.
> WDYT?
Yeah, I agree. I thought of this renaming during writing the patch,
but I didn't do that to keep the patch simple.
>
> The patch is OK with or without that change.
Patch below is what I committed, with the renaming.
--
Yao (éå)
gdb:
2013-10-04 Yao Qi <yao@codesourcery.com>
* remote-notif.c (DECLARE_QUEUE_P): Remove.
(notif_queue): Remove.
(remote_notif_process): Add one parameter 'notif_queue'.
Update comments. Callers update.
(remote_async_get_pending_events_token): Remove.
(remote_notif_register_async_event_handler): Remove.
(remote_notif_unregister_async_event_handler): Remove.
(handle_notification): Add parameter 'notif_queue'. Update
comments. Callers update.
(notif_xfree): Remove.
(remote_notif_state_allocate): New function.
(remote_notif_state_xfree): New function.
(_initialize_notif): Remove code to allocate queue.
* remote-notif.h (DECLARE_QUEUE_P): Moved from remote-notif.c.
(struct remote_notif_state): New.
(handle_notification): Update declaration.
(remote_notif_process): Likewise.
(remote_notif_register_async_event_handler): Remove.
(remote_notif_unregister_async_event_handler): Remove.
(remote_notif_state_allocate): Declare.
(remote_notif_state_xfree): Declare.
* remote.c (struct remote_state) <notif_state>: New field.
(remote_close): Don't call
remote_notif_unregister_async_event_handler. Call
remote_notif_state_xfree.
(remote_open_1): Don't call
remote_notif_register_async_event_handler. Call
remote_notif_state_allocate.
---
gdb/remote-notif.c | 88 +++++++++++++++++++++++----------------------------
gdb/remote-notif.h | 28 ++++++++++++++--
gdb/remote.c | 13 +++++---
3 files changed, 72 insertions(+), 57 deletions(-)
diff --git a/gdb/remote-notif.c b/gdb/remote-notif.c
index 0f73a52..905b8a1 100644
--- a/gdb/remote-notif.c
+++ b/gdb/remote-notif.c
@@ -91,21 +91,19 @@ remote_notif_parse (struct notif_client *nc, char *buf)
return event;
}
-DECLARE_QUEUE_P (notif_client_p);
DEFINE_QUEUE_P (notif_client_p);
-static QUEUE(notif_client_p) *notif_queue;
-
-/* Process notifications one by one. EXCEPT is not expected in
- the queue. */
+/* Process notifications in STATE's notification queue one by one.
+ EXCEPT is not expected in the queue. */
void
-remote_notif_process (struct notif_client *except)
+remote_notif_process (struct remote_notif_state *state,
+ struct notif_client *except)
{
- while (!QUEUE_is_empty (notif_client_p, notif_queue))
+ while (!QUEUE_is_empty (notif_client_p, state->notif_queue))
{
struct notif_client *nc = QUEUE_deque (notif_client_p,
- notif_queue);
+ state->notif_queue);
gdb_assert (nc != except);
@@ -118,39 +116,14 @@ static void
remote_async_get_pending_events_handler (gdb_client_data data)
{
gdb_assert (non_stop);
- remote_notif_process (NULL);
-}
-
-/* Asynchronous signal handle registered as event loop source for when
- the remote sent us a notification. The registered callback
- will do a ACK sequence to pull the rest of the events out of
- the remote side into our event queue. */
-
-static struct async_event_handler *remote_async_get_pending_events_token;
-
-/* Register async_event_handler for notification. */
-
-void
-remote_notif_register_async_event_handler (void)
-{
- remote_async_get_pending_events_token
- = create_async_event_handler (remote_async_get_pending_events_handler,
- NULL);
-}
-
-/* Unregister async_event_handler for notification. */
-
-void
-remote_notif_unregister_async_event_handler (void)
-{
- if (remote_async_get_pending_events_token)
- delete_async_event_handler (&remote_async_get_pending_events_token);
+ remote_notif_process (data, NULL);
}
-/* Remote notification handler. */
+/* Remote notification handler. Parse BUF, queue notification and
+ update STATE. */
void
-handle_notification (char *buf)
+handle_notification (struct remote_notif_state *state, char *buf)
{
struct notif_client *nc = NULL;
int i;
@@ -188,7 +161,7 @@ handle_notification (char *buf)
/* Notify the event loop there's a stop reply to acknowledge
and that there may be more events to fetch. */
- QUEUE_enque (notif_client_p, notif_queue, nc);
+ QUEUE_enque (notif_client_p, state->notif_queue, nc);
if (non_stop)
{
/* In non-stop, We mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
@@ -227,7 +200,7 @@ handle_notification (char *buf)
2.3) <-- T05 thread:2
These pending notifications can be processed later. */
- mark_async_event_handler (remote_async_get_pending_events_token);
+ mark_async_event_handler (state->get_pending_events_token);
}
if (notif_debug)
@@ -250,15 +223,36 @@ do_notif_event_xfree (void *arg)
xfree (event);
}
-static void
-notif_xfree (struct notif_client *notif)
+/* Return an allocated remote_notif_state. */
+
+struct remote_notif_state *
+remote_notif_state_allocate (void)
+{
+ struct remote_notif_state *notif_state = xzalloc (sizeof (*notif_state));
+
+ notif_state->notif_queue = QUEUE_alloc (notif_client_p, NULL);
+
+ /* Register async_event_handler for notification. */
+
+ notif_state->get_pending_events_token
+ = create_async_event_handler (remote_async_get_pending_events_handler,
+ notif_state);
+
+ return notif_state;
+}
+
+/* Free STATE and its fields. */
+
+void
+remote_notif_state_xfree (struct remote_notif_state *state)
{
- if (notif->pending_event != NULL
- && notif->pending_event->dtr != NULL)
- notif->pending_event->dtr (notif->pending_event);
+ QUEUE_free (notif_client_p, state->notif_queue);
+
+ /* Unregister async_event_handler for notification. */
+ if (state->get_pending_events_token != NULL)
+ delete_async_event_handler (&state->get_pending_events_token);
- xfree (notif->pending_event);
- xfree (notif);
+ xfree (state);
}
/* -Wmissing-prototypes */
@@ -267,8 +261,6 @@ extern initialize_file_ftype _initialize_notif;
void
_initialize_notif (void)
{
- notif_queue = QUEUE_alloc (notif_client_p, notif_xfree);
-
add_setshow_boolean_cmd ("notification", no_class, ¬if_debug,
_("\
Set debugging of async remote notification."), _("\
diff --git a/gdb/remote-notif.h b/gdb/remote-notif.h
index da4fdea..4c3617e 100644
--- a/gdb/remote-notif.h
+++ b/gdb/remote-notif.h
@@ -68,16 +68,36 @@ typedef struct notif_client
struct notif_event *pending_event;
} *notif_client_p;
+DECLARE_QUEUE_P (notif_client_p);
+
+/* State on remote async notification. */
+
+struct remote_notif_state
+{
+ /* Notification queue. */
+
+ QUEUE(notif_client_p) *notif_queue;
+
+ /* Asynchronous signal handle registered as event loop source for when
+ the remote sent us a notification. The registered callback
+ will do a ACK sequence to pull the rest of the events out of
+ the remote side into our event queue. */
+
+ struct async_event_handler *get_pending_events_token;
+};
+
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 handle_notification (struct remote_notif_state *notif_state,
+ char *buf);
-void remote_notif_register_async_event_handler (void);
-void remote_notif_unregister_async_event_handler (void);
+void remote_notif_process (struct remote_notif_state *state,
+ struct notif_client *except);
+struct remote_notif_state *remote_notif_state_allocate (void);
+void remote_notif_state_xfree (struct remote_notif_state *state);
-void remote_notif_process (struct notif_client *except);
extern struct notif_client notif_client_stop;
extern int notif_debug;
diff --git a/gdb/remote.c b/gdb/remote.c
index a9ef297..6ac3f51 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -425,6 +425,9 @@ struct remote_state
threadref echo_nextthread;
threadref nextthread;
threadref resultthreadlist[MAXTHREADLISTRESULTS];
+
+ /* The state of remote notification. */
+ struct remote_notif_state *notif_state;
};
/* Private data that we'll store in (struct thread_info)->private. */
@@ -3073,7 +3076,7 @@ remote_close (void)
if (remote_async_inferior_event_token)
delete_async_event_handler (&remote_async_inferior_event_token);
- remote_notif_unregister_async_event_handler ();
+ remote_notif_state_xfree (rs->notif_state);
trace_reset_local_state ();
}
@@ -4337,7 +4340,7 @@ remote_open_1 (char *name, int from_tty,
remote_async_inferior_event_token
= create_async_event_handler (remote_async_inferior_event_handler,
NULL);
- remote_notif_register_async_event_handler ();
+ rs->notif_state = remote_notif_state_allocate ();
/* Reset the target state; these things will be queried either by
remote_query_supported or as they are needed. */
@@ -4931,7 +4934,7 @@ remote_resume (struct target_ops *ops,
before resuming inferior, because inferior was stopped and no RSP
traffic at that moment. */
if (!non_stop)
- remote_notif_process (¬if_client_stop);
+ remote_notif_process (rs->notif_state, ¬if_client_stop);
rs->last_sent_signal = siggnal;
rs->last_sent_step = step;
@@ -7352,7 +7355,7 @@ putpkt_binary (char *buf, int cnt)
str);
do_cleanups (old_chain);
}
- handle_notification (rs->buf);
+ handle_notification (rs->notif_state, rs->buf);
/* We're in sync now, rewait for the ack. */
tcount = 0;
}
@@ -7738,7 +7741,7 @@ getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
if (is_notif != NULL)
*is_notif = 1;
- handle_notification (*buf);
+ handle_notification (rs->notif_state, *buf);
/* Notifications require no acknowledgement. */
--
1.7.7.6