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GWin32AppInfo: Use a thread for async appinfo tree rebuilds

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This commit is contained in:
Руслан Ижбулатов 2020-10-03 22:44:19 +00:00
parent f01ca92821
commit 427d4fad24
3 changed files with 121 additions and 30 deletions
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4
gio/giomodule.c
View File

@ -49,6 +49,7 @@
#include "gmemorymonitordbus.h"
#ifdef G_OS_WIN32
#include "gregistrysettingsbackend.h"
#include "giowin32-priv.h"
#endif
#include <glib/gstdio.h>
@ -1068,7 +1069,10 @@ DllMain (HINSTANCE hinstDLL,
LPVOID lpvReserved)
{
if (fdwReason == DLL_PROCESS_ATTACH)
{
gio_dll = hinstDLL;
gio_win32_appinfo_init (FALSE);
}
return TRUE;
}

2
gio/giowin32-priv.h
View File

@ -35,6 +35,8 @@ GOutputStream *
g_win32_output_stream_new_from_fd (gint fd,
gboolean close_fd);
void
gio_win32_appinfo_init (gboolean do_wait);
G_END_DECLS
#endif /* __G_IO_MODULE_PRIV_H__ */

145
gio/gwin32appinfo.c
View File

@ -36,6 +36,7 @@
#include <windows.h>
#include <glib/gstdioprivate.h>
#include "giowin32-priv.h"
#include "glib-private.h"
/* We need to watch 8 places:
@ -519,7 +520,26 @@ g_win32_appinfo_application_init (GWin32AppInfoApplication *self)
self->verbs = g_ptr_array_new_with_free_func (g_object_unref);
}
G_LOCK_DEFINE_STATIC (gio_win32_appinfo);
/* The AppInfo threadpool that does asynchronous AppInfo tree rebuilds */
static GThreadPool *gio_win32_appinfo_threadpool;
/* This mutex is held by a thread that reads or writes the AppInfo tree.
* (tree object references can be obtained and later read without
* holding this mutex, since objects are practically immutable).
*/
static GMutex gio_win32_appinfo_mutex;
/* Any thread wanting to access AppInfo can wait on this condition */
static GCond gio_win32_appinfo_cond;
/* Increased to indicate that AppInfo tree does needs to be rebuilt.
* AppInfo thread checks this to see if it needs to
* do a tree re-build. If the value changes during a rebuild,
* another rebuild is triggered after that.
* Other threads check this to see if they need
* to wait for a tree re-build to finish.
*/
static gint gio_win32_appinfo_update_counter = 0;
/* Map of owned ".ext" (with '.', UTF-8, folded)
* to GWin32AppInfoFileExtension ptr
@ -3046,6 +3066,19 @@ update_registry_data (void)
return;
}
/* This function is called when any of our registry watchers detect
* changes in the registry.
*/
static void
keys_updated (GWin32RegistryKey *key,
gpointer user_data)
{
/* Indicate the tree as not up-to-date, push a new job for the AppInfo thread */
g_atomic_int_inc (&gio_win32_appinfo_update_counter);
/* We don't use the data pointer, but it must be non-NULL */
g_thread_pool_push (gio_win32_appinfo_threadpool, (gpointer) keys_updated, NULL);
}
static void
watch_keys (void)
{
@ -3055,7 +3088,7 @@ watch_keys (void)
G_WIN32_REGISTRY_WATCH_NAME |
G_WIN32_REGISTRY_WATCH_ATTRIBUTES |
G_WIN32_REGISTRY_WATCH_VALUES,
NULL,
keys_updated,
NULL,
NULL);
@ -3065,7 +3098,7 @@ watch_keys (void)
G_WIN32_REGISTRY_WATCH_NAME |
G_WIN32_REGISTRY_WATCH_ATTRIBUTES |
G_WIN32_REGISTRY_WATCH_VALUES,
NULL,
keys_updated,
NULL,
NULL);
@ -3075,7 +3108,7 @@ watch_keys (void)
G_WIN32_REGISTRY_WATCH_NAME |
G_WIN32_REGISTRY_WATCH_ATTRIBUTES |
G_WIN32_REGISTRY_WATCH_VALUES,
NULL,
keys_updated,
NULL,
NULL);
@ -3085,7 +3118,7 @@ watch_keys (void)
G_WIN32_REGISTRY_WATCH_NAME |
G_WIN32_REGISTRY_WATCH_ATTRIBUTES |
G_WIN32_REGISTRY_WATCH_VALUES,
NULL,
keys_updated,
NULL,
NULL);
@ -3095,7 +3128,7 @@ watch_keys (void)
G_WIN32_REGISTRY_WATCH_NAME |
G_WIN32_REGISTRY_WATCH_ATTRIBUTES |
G_WIN32_REGISTRY_WATCH_VALUES,
NULL,
keys_updated,
NULL,
NULL);
@ -3105,7 +3138,7 @@ watch_keys (void)
G_WIN32_REGISTRY_WATCH_NAME |
G_WIN32_REGISTRY_WATCH_ATTRIBUTES |
G_WIN32_REGISTRY_WATCH_VALUES,
NULL,
keys_updated,
NULL,
NULL);
@ -3115,7 +3148,7 @@ watch_keys (void)
G_WIN32_REGISTRY_WATCH_NAME |
G_WIN32_REGISTRY_WATCH_ATTRIBUTES |
G_WIN32_REGISTRY_WATCH_VALUES,
NULL,
keys_updated,
NULL,
NULL);
@ -3125,14 +3158,45 @@ watch_keys (void)
G_WIN32_REGISTRY_WATCH_NAME |
G_WIN32_REGISTRY_WATCH_ATTRIBUTES |
G_WIN32_REGISTRY_WATCH_VALUES,
NULL,
keys_updated,
NULL,
NULL);
}
/* This is the main function of the AppInfo thread */
static void
g_win32_appinfo_init (void)
gio_win32_appinfo_thread_func (gpointer data,
gpointer user_data)
{
gint saved_counter;
g_mutex_lock (&gio_win32_appinfo_mutex);
saved_counter = g_atomic_int_get (&gio_win32_appinfo_update_counter);
if (saved_counter > 0)
update_registry_data ();
/* If the counter didn't change while we were working, then set it to zero.
* Otherwise we need to rebuild the tree again, so keep it greater than zero.
* Numeric value doesn't matter - even if we're asked to rebuild N times,
* we just need to rebuild once, and as long as there were no new rebuild
* requests while we were working, we're done.
*/
if (g_atomic_int_compare_and_exchange (&gio_win32_appinfo_update_counter,
saved_counter,
0))
g_cond_broadcast (&gio_win32_appinfo_cond);
g_mutex_unlock (&gio_win32_appinfo_mutex);
}
/* Initializes Windows AppInfo. Creates the registry watchers,
* the AppInfo thread, and initiates an update of the AppInfo tree.
* Called with do_wait = `FALSE` at startup to prevent it from
* blocking until the tree is updated. All subsequent calls
* from everywhere else are made with do_wait = `TRUE`, blocking
* until the tree is re-built (if needed).
*/
void
gio_win32_appinfo_init (gboolean do_wait)
{
static gsize initialized;
@ -3165,11 +3229,31 @@ g_win32_appinfo_init (void)
watch_keys ();
update_registry_data ();
/* We don't really require an exclusive pool, but the implementation
* details might cause the g_thread_pool_push() call below to block
* if the pool is not exclusive (specifically - for POSIX threads backend
* lacking thread scheduler settings).
*/
gio_win32_appinfo_threadpool = g_thread_pool_new (gio_win32_appinfo_thread_func,
NULL,
1,
TRUE,
NULL);
g_mutex_init (&gio_win32_appinfo_mutex);
g_cond_init (&gio_win32_appinfo_cond);
g_atomic_int_set (&gio_win32_appinfo_update_counter, 1);
/* Trigger initial tree build. Fake data pointer. */
g_thread_pool_push (gio_win32_appinfo_threadpool, (gpointer) keys_updated, NULL);
g_once_init_leave (&initialized, TRUE);
}
if (!do_wait)
return;
/* If any of the keys had a change, then we've already initiated
* a tree re-build in keys_updated(). Just wait for it to finish.
*/
if ((url_associations_key && g_win32_registry_key_has_changed (url_associations_key)) ||
(file_exts_key && g_win32_registry_key_has_changed (file_exts_key)) ||
(user_clients_key && g_win32_registry_key_has_changed (user_clients_key)) ||
@ -3179,10 +3263,11 @@ g_win32_appinfo_init (void)
(system_registered_apps_key && g_win32_registry_key_has_changed (system_registered_apps_key)) ||
(classes_root_key && g_win32_registry_key_has_changed (classes_root_key)))
{
G_LOCK (gio_win32_appinfo);
update_registry_data ();
g_mutex_lock (&gio_win32_appinfo_mutex);
while (g_atomic_int_get (&gio_win32_appinfo_update_counter) > 0)
g_cond_wait (&gio_win32_appinfo_cond, &gio_win32_appinfo_mutex);
watch_keys ();
G_UNLOCK (gio_win32_appinfo);
g_mutex_unlock (&gio_win32_appinfo_mutex);
}
}
@ -3248,8 +3333,8 @@ g_win32_app_info_new_from_app (GWin32AppInfoApplication *app,
new_info->app = g_object_ref (app);
g_win32_appinfo_init ();
G_LOCK (gio_win32_appinfo);
gio_win32_appinfo_init (TRUE);
g_mutex_lock (&gio_win32_appinfo_mutex);
i = 0;
g_hash_table_iter_init (&iter, new_info->app->supported_exts);
@ -3274,7 +3359,7 @@ g_win32_app_info_new_from_app (GWin32AppInfoApplication *app,
i += 1;
}
G_UNLOCK (gio_win32_appinfo);
g_mutex_unlock (&gio_win32_appinfo_mutex);
new_info->supported_types[i] = NULL;
@ -4216,13 +4301,13 @@ g_app_info_get_default_for_uri_scheme (const char *uri_scheme)
return NULL;
}
g_win32_appinfo_init ();
G_LOCK (gio_win32_appinfo);
gio_win32_appinfo_init (TRUE);
g_mutex_lock (&gio_win32_appinfo_mutex);
g_set_object (&scheme, g_hash_table_lookup (urls, scheme_down));
g_free (scheme_down);
G_UNLOCK (gio_win32_appinfo);
g_mutex_unlock (&gio_win32_appinfo_mutex);
result = NULL;
@ -4252,14 +4337,14 @@ g_app_info_get_default_for_type (const char *content_type,
if (!ext_down)
return NULL;
g_win32_appinfo_init ();
G_LOCK (gio_win32_appinfo);
gio_win32_appinfo_init (TRUE);
g_mutex_lock (&gio_win32_appinfo_mutex);
/* Assuming that "content_type" is a file extension, not a MIME type */
g_set_object (&ext, g_hash_table_lookup (extensions, ext_down));
g_free (ext_down);
G_UNLOCK (gio_win32_appinfo);
g_mutex_unlock (&gio_win32_appinfo_mutex);
if (ext == NULL)
return NULL;
@ -4309,15 +4394,15 @@ g_app_info_get_all (void)
GList *apps;
GList *apps_i;
g_win32_appinfo_init ();
G_LOCK (gio_win32_appinfo);
gio_win32_appinfo_init (TRUE);
g_mutex_lock (&gio_win32_appinfo_mutex);
apps = NULL;
g_hash_table_iter_init (&iter, apps_by_id);
while (g_hash_table_iter_next (&iter, NULL, &value))
apps = g_list_prepend (apps, g_object_ref (G_OBJECT (value)));
G_UNLOCK (gio_win32_appinfo);
g_mutex_unlock (&gio_win32_appinfo_mutex);
infos = NULL;
for (apps_i = apps; apps_i; apps_i = apps_i->next)
@ -4345,14 +4430,14 @@ g_app_info_get_all_for_type (const char *content_type)
if (!ext_down)
return NULL;
g_win32_appinfo_init ();
G_LOCK (gio_win32_appinfo);
gio_win32_appinfo_init (TRUE);
g_mutex_lock (&gio_win32_appinfo_mutex);
/* Assuming that "content_type" is a file extension, not a MIME type */
g_set_object (&ext, g_hash_table_lookup (extensions, ext_down));
g_free (ext_down);
G_UNLOCK (gio_win32_appinfo);
g_mutex_unlock (&gio_win32_appinfo_mutex);
if (ext == NULL)
return NULL;