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Fix GWin32DirectoryMonitor

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GWin32DirectoryMonitor was quite broken, but nobody had apparently
noticed, or at least not filed any bug. Only now with a bleeding edge
GTK+ file chooser does the code get exercised in common programs like
gtk-demo or GIMP, apparently. Bug #598899.
This commit is contained in:
Tor Lillqvist 2009-10-23 00:46:50 +03:00
parent 8eebc18944
commit d105f431b0
1 changed files with 50 additions and 17 deletions
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67
gio/win32/gwin32directorymonitor.c
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@ -64,9 +64,29 @@ g_win32_directory_monitor_finalize (GObject *base)
{
GWin32DirectoryMonitor *self;
self = G_WIN32_DIRECTORY_MONITOR (base);
g_free (self->priv->file_notify_buffer);
g_free (self->priv);
if (self->priv->hDirectory == INVALID_HANDLE_VALUE)
{
/* If we don't have a directory handle we can free
* self->priv->file_notify_buffer and self->priv here. The
* callback won't be called obviously any more (and presumably
* never has been called).
*/
g_free (self->priv->file_notify_buffer);
self->priv->file_notify_buffer = NULL;
g_free (self->priv);
}
else
{
/* If we have a directory handle, the OVERLAPPED struct is
* passed once more to the callback as a result of the
* CloseHandle() done in the cancel method, so self->priv has to
* be kept around. The GWin32DirectoryMonitor object is
* disappearing, so can't leave a pointer to it in
* self->priv->self.
*/
self->priv->self = NULL;
}
if (G_OBJECT_CLASS (g_win32_directory_monitor_parent_class)->finalize)
(*G_OBJECT_CLASS (g_win32_directory_monitor_parent_class)->finalize) (base);
@ -78,7 +98,13 @@ g_win32_directory_monitor_cancel (GFileMonitor *base)
GWin32DirectoryMonitor *self;
self = G_WIN32_DIRECTORY_MONITOR (base);
/* This triggers a last callback() with nBytes=0 */
/* This triggers a last callback() with nBytes==0. */
/* Actually I am not so sure about that, it seems to trigger a last
* callback allright, but the way to recognize that it is the final
* one is not to check for nBytes==0, I think that was a
* misunderstanding.
*/
if (self->priv->hDirectory != INVALID_HANDLE_VALUE)
CloseHandle (self->priv->hDirectory);
@ -94,7 +120,7 @@ g_win32_directory_monitor_callback (DWORD error,
{
gulong offset;
PFILE_NOTIFY_INFORMATION pfile_notify_walker;
gulong file_name_len;
glong file_name_len;
gchar *file_name;
gchar *path;
GFile *file;
@ -110,23 +136,30 @@ g_win32_directory_monitor_callback (DWORD error,
G_FILE_MONITOR_EVENT_CREATED, /* FILE_ACTION_RENAMED_NEW_NAME */
};
if (!nBytes) /* Monitor was cancelled/finalized */
return;
if (g_file_monitor_is_cancelled (G_FILE_MONITOR (priv->self)))
return; /* and ReadDirectoryChangesW doesn't get called this time */
/* If priv->self is NULL the GWin32DirectoryMonitor object has been destroyed. */
if (priv->self == NULL ||
g_file_monitor_is_cancelled (priv->self) ||
priv->file_notify_buffer == NULL)
{
g_free (priv->file_notify_buffer);
g_free (priv);
return;
}
offset = 0;
do {
pfile_notify_walker = (PFILE_NOTIFY_INFORMATION)(priv->file_notify_buffer + offset);
if (pfile_notify_walker->Action > 0)
{
file_name = g_utf16_to_utf8 (pfile_notify_walker->FileName, pfile_notify_walker->FileNameLength / sizeof(WCHAR), NULL, &file_name_len, NULL);
path = g_build_filename(G_LOCAL_DIRECTORY_MONITOR (priv->self)->dirname, file_name, NULL);
file = g_file_new_for_path (path);
g_file_monitor_emit_event (priv->self, file, NULL, events [pfile_notify_walker->Action]);
g_object_unref (file);
g_free (path);
g_free (file_name);
}
offset += pfile_notify_walker->NextEntryOffset;
file_name = g_utf16_to_utf8 (pfile_notify_walker->FileName, pfile_notify_walker->FileNameLength / sizeof(WCHAR), NULL, &file_name_len, NULL);
path = g_build_filename(G_LOCAL_DIRECTORY_MONITOR (priv->self)->dirname, file_name, NULL);
file = g_file_new_for_path (path);
g_file_monitor_emit_event (priv->self, file, NULL, events [pfile_notify_walker->Action]);
g_object_unref (file);
g_free (path);
g_free (file_name);
} while (pfile_notify_walker->NextEntryOffset);
ReadDirectoryChangesW (priv->hDirectory,