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libweston: Introduce timeline subscription and timeline subscription object

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An object based on 'weston_timeline_subscription' will be created for
each subscription created. It contains the next object ID and list of
'weston_timeline_subscription_object'.

It will automatically be cleaned by the logging framework when the
subscription gets destroyed, or use the object destroy signal to trigger
the destruction of the timeline subscription (@pq), when the object
itself is being destroyed.

This class will hanged-off the subscription, such that we can
retrieve it when going over all the subscriptions.

An object based on 'weston_timeline_subscription_object' will help
maintain the state of the objects seen and will be created when a new
object will be emitted for a particular 'weston_timeline_subscription'.

Adds wrappers for ensuring the timeline subscription object is created
or has to be searched in order to be found, as to avoid duplicated code.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Suggested-by: Daniel Stone <daniel.stone@collabora.com>
dev
Marius Vlad 5 years ago
parent 2a1b7865dd
commit fb10ed768b
2 changed files with 215 additions and 46 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 238
      libweston/timeline.c
  2. 23
      libweston/timeline.h

238
libweston/timeline.c
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@ -32,91 +32,229 @@
#include <time.h>
#include <assert.h>
#include "timeline.h"
#include <libweston/libweston.h>
#include <libweston/weston-log.h>
#include "timeline.h"
#include "weston-log-internal.h"
WL_EXPORT int weston_timeline_enabled_;
struct timeline_emit_context {
FILE *cur;
FILE *out;
unsigned series;
struct weston_log_subscription *subscription;
};
static unsigned
timeline_new_id(void)
/** Create a timeline subscription and hang it off the subscription
*
* Called when the subscription is created.
*
* @ingroup internal-log
*/
void
weston_timeline_create_subscription(struct weston_log_subscription *sub,
void *user_data)
{
static unsigned idc;
struct weston_timeline_subscription *tl_sub = zalloc(sizeof(*tl_sub));
if (!tl_sub)
return;
if (++idc == 0)
++idc;
wl_list_init(&tl_sub->objects);
return idc;
/* attach this timeline_subscription to it */
weston_log_subscription_set_data(sub, tl_sub);
}
static int
check_series(struct timeline_emit_context *ctx,
struct weston_timeline_object *to)
static void
weston_timeline_destroy_subscription_object(struct weston_timeline_subscription_object *sub_obj)
{
if (to->series == 0 || to->series != ctx->series) {
to->series = ctx->series;
to->id = timeline_new_id();
return 1;
/* remove the notify listener */
wl_list_remove(&sub_obj->destroy_listener.link);
sub_obj->destroy_listener.notify = NULL;
wl_list_remove(&sub_obj->subscription_link);
free(sub_obj);
}
if (to->force_refresh) {
to->force_refresh = 0;
return 1;
/** Destroy the timeline subscription and all timeline subscription objects
* associated with it.
*
* Called when (before) the subscription is destroyed.
*
* @ingroup internal-log
*/
void
weston_timeline_destroy_subscription(struct weston_log_subscription *sub,
void *user_data)
{
struct weston_timeline_subscription *tl_sub =
weston_log_subscription_get_data(sub);
struct weston_timeline_subscription_object *sub_obj, *tmp_sub_obj;
if (!tl_sub)
return;
wl_list_for_each_safe(sub_obj, tmp_sub_obj,
&tl_sub->objects, subscription_link)
weston_timeline_destroy_subscription_object(sub_obj);
free(tl_sub);
}
return 0;
static bool
weston_timeline_check_object_refresh(struct weston_timeline_subscription_object *obj)
{
if (obj->force_refresh == true) {
obj->force_refresh = false;
return true;
}
return false;
}
static struct weston_timeline_subscription_object *
weston_timeline_subscription_search(struct weston_timeline_subscription *tl_sub,
void *object)
{
struct weston_timeline_subscription_object *sub_obj;
wl_list_for_each(sub_obj, &tl_sub->objects, subscription_link)
if (sub_obj->object == object)
return sub_obj;
return NULL;
}
static struct weston_timeline_subscription_object *
weston_timeline_subscription_object_create(void *object,
struct weston_timeline_subscription *tm_sub)
{
struct weston_timeline_subscription_object *sub_obj;
sub_obj = zalloc(sizeof(*sub_obj));
sub_obj->id = ++tm_sub->next_id;
sub_obj->object = object;
/* when the object is created so that it has the chance to display the
* object ID, we set the refresh status; it will only be re-freshed by
* the backend (or part parts) when the underlying objects has suffered
* modifications */
sub_obj->force_refresh = true;
wl_list_insert(&tm_sub->objects, &sub_obj->subscription_link);
return sub_obj;
}
static void
weston_timeline_destroy_subscription_object_notify(struct wl_listener *listener, void *data)
{
struct weston_timeline_subscription_object *sub_obj;
sub_obj = wl_container_of(listener, sub_obj, destroy_listener);
weston_timeline_destroy_subscription_object(sub_obj);
}
static struct weston_timeline_subscription_object *
weston_timeline_subscription_output_ensure(struct weston_timeline_subscription *tl_sub,
struct weston_output *output)
{
struct weston_timeline_subscription_object *sub_obj;
sub_obj = weston_timeline_subscription_search(tl_sub, output);
if (!sub_obj) {
sub_obj = weston_timeline_subscription_object_create(output, tl_sub);
sub_obj->destroy_listener.notify =
weston_timeline_destroy_subscription_object_notify;
wl_signal_add(&output->destroy_signal,
&sub_obj->destroy_listener);
}
return sub_obj;
}
static struct weston_timeline_subscription_object *
weston_timeline_subscription_surface_ensure(struct weston_timeline_subscription *tl_sub,
struct weston_surface *surface)
{
struct weston_timeline_subscription_object *sub_obj;
sub_obj = weston_timeline_subscription_search(tl_sub, surface);
if (!sub_obj) {
sub_obj = weston_timeline_subscription_object_create(surface, tl_sub);
sub_obj->destroy_listener.notify =
weston_timeline_destroy_subscription_object_notify;
wl_signal_add(&surface->destroy_signal,
&sub_obj->destroy_listener);
}
return sub_obj;
}
static void
fprint_quoted_string(FILE *fp, const char *str)
fprint_quoted_string(struct weston_log_subscription *sub, const char *str)
{
if (!str) {
fprintf(fp, "null");
weston_log_subscription_printf(sub, "null");
return;
}
fprintf(fp, "\"%s\"", str);
weston_log_subscription_printf(sub, "\"%s\"", str);
}
static void
emit_weston_output_print_id(struct weston_log_subscription *sub,
struct weston_timeline_subscription_object *sub_obj,
const char *name)
{
if (!weston_timeline_check_object_refresh(sub_obj))
return;
weston_log_subscription_printf(sub, "{ \"id\":%u, "
"\"type\":\"weston_output\", \"name\":", sub_obj->id);
fprint_quoted_string(sub, name);
weston_log_subscription_printf(sub, " }\n");
}
static int
emit_weston_output(struct timeline_emit_context *ctx, void *obj)
{
struct weston_output *o = obj;
struct weston_log_subscription *sub = ctx->subscription;
struct weston_output *output = obj;
struct weston_timeline_subscription_object *sub_obj;
struct weston_timeline_subscription *tl_sub;
if (check_series(ctx, &o->timeline)) {
fprintf(ctx->out, "{ \"id\":%u, "
"\"type\":\"weston_output\", \"name\":",
o->timeline.id);
fprint_quoted_string(ctx->out, o->name);
fprintf(ctx->out, " }\n");
}
tl_sub = weston_log_subscription_get_data(sub);
sub_obj = weston_timeline_subscription_output_ensure(tl_sub, output);
emit_weston_output_print_id(sub, sub_obj, output->name);
fprintf(ctx->cur, "\"wo\":%u", o->timeline.id);
assert(sub_obj->id != 0);
fprintf(ctx->cur, "\"wo\":%u", sub_obj->id);
return 1;
}
static void
check_weston_surface_description(struct timeline_emit_context *ctx,
struct weston_surface *s)
check_weston_surface_description(struct weston_log_subscription *sub,
struct weston_surface *s,
struct weston_timeline_subscription *tm_sub,
struct weston_timeline_subscription_object *sub_obj)
{
struct weston_surface *mains;
char d[512];
char mainstr[32];
if (!check_series(ctx, &s->timeline))
if (!weston_timeline_check_object_refresh(sub_obj))
return;
mains = weston_surface_get_main_surface(s);
if (mains != s) {
check_weston_surface_description(ctx, mains);
if (snprintf(mainstr, sizeof(mainstr),
", \"main_surface\":%u", mains->timeline.id) < 0)
struct weston_timeline_subscription_object *new_sub_obj;
new_sub_obj = weston_timeline_subscription_surface_ensure(tm_sub, mains);
check_weston_surface_description(sub, mains, tm_sub, new_sub_obj);
if (snprintf(mainstr, sizeof(mainstr), ", \"main_surface\":%u",
new_sub_obj->id) < 0)
mainstr[0] = '\0';
} else {
mainstr[0] = '\0';
@ -125,19 +263,27 @@ check_weston_surface_description(struct timeline_emit_context *ctx,
if (!s->get_label || s->get_label(s, d, sizeof(d)) < 0)
d[0] = '\0';
fprintf(ctx->out, "{ \"id\":%u, "
"\"type\":\"weston_surface\", \"desc\":", s->timeline.id);
fprint_quoted_string(ctx->out, d[0] ? d : NULL);
fprintf(ctx->out, "%s }\n", mainstr);
weston_log_subscription_printf(sub, "{ \"id\":%u, "
"\"type\":\"weston_surface\", \"desc\":",
sub_obj->id);
fprint_quoted_string(sub, d[0] ? d : NULL);
weston_log_subscription_printf(sub, "%s }\n", mainstr);
}
static int
emit_weston_surface(struct timeline_emit_context *ctx, void *obj)
{
struct weston_surface *s = obj;
struct weston_log_subscription *sub = ctx->subscription;
struct weston_surface *surface = obj;
struct weston_timeline_subscription_object *sub_obj;
struct weston_timeline_subscription *tl_sub;
tl_sub = weston_log_subscription_get_data(sub);
sub_obj = weston_timeline_subscription_surface_ensure(tl_sub, surface);
check_weston_surface_description(sub, surface, tl_sub, sub_obj);
check_weston_surface_description(ctx, s);
fprintf(ctx->cur, "\"ws\":%u", s->timeline.id);
assert(sub_obj->id != 0);
fprintf(ctx->cur, "\"ws\":%u", sub_obj->id);
return 1;
}
@ -214,7 +360,7 @@ weston_timeline_point(const char *name, ...)
if (ferror(ctx.cur)) {
weston_log("Timeline error in constructing entry, closing.\n");
} else {
fprintf(ctx.out, "%s", buf);
weston_log_subscription_printf(ctx.subscription, "%s", buf);
}
fclose(ctx.cur);

23
libweston/timeline.h
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@ -27,6 +27,12 @@
#ifndef WESTON_TIMELINE_H
#define WESTON_TIMELINE_H
#include <wayland-util.h>
#include <stdbool.h>
#include <libweston/weston-log.h>
#include <wayland-server-core.h>
extern int weston_timeline_enabled_;
enum timeline_type {
@ -37,6 +43,23 @@ enum timeline_type {
TLT_GPU,
};
struct weston_timeline_subscription {
unsigned int next_id;
struct wl_list objects; /**< weston_timeline_subscription_object::subscription_link */
};
/**
* Created when object is first seen for a particular timeline subscription
* Destroyed when the subscription got destroyed or object was destroyed
*/
struct weston_timeline_subscription_object {
void *object; /**< points to the object */
unsigned int id;
bool force_refresh;
struct wl_list subscription_link; /**< weston_timeline_subscription::objects */
struct wl_listener destroy_listener;
};
#define TYPEVERIFY(type, arg) ({ \
typeof(arg) tmp___ = (arg); \
(void)((type)0 == tmp___); \

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