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x11: remove Rc cycle between XConnection, Window, bitmaps

Browse Source 
refs: https://github.com/wez/wezterm/issues/238

It's not a smoking gun, but helps clean up the valgrind output
This commit is contained in:
Wez Furlong 2020-07-13 09:00:00 -07:00
parent 4cd4ee2eb5
commit 888cded0e3
8 changed files with 113 additions and 73 deletions
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6
src/frontend/gui/mod.rs
View File

@ -24,6 +24,12 @@ pub struct GuiFrontEnd {
connection: Rc<Connection>,
}
impl Drop for GuiFrontEnd {
fn drop(&mut self) {
window::connection::shutdown();
}
}
static USE_OPENGL: AtomicBool = AtomicBool::new(true);
pub fn is_opengl_enabled() -> bool {

4
src/frontend/mod.rs
View File

@ -50,6 +50,10 @@ pub fn front_end() -> Option<Rc<dyn FrontEnd>> {
res
}
pub fn shutdown() {
FRONT_END.with(|f| drop(f.borrow_mut().take()));
}
impl FrontEndSelection {
pub fn try_new(self) -> Result<Rc<dyn FrontEnd>, Error> {
let (front_end, is_gui) = match self {

2
src/main.rs
View File

@ -725,6 +725,8 @@ fn main() {
if let Err(e) = run() {
terminate_with_error(e);
}
Mux::shutdown();
frontend::shutdown();
}
fn maybe_show_configuration_error_window() {

4
src/mux/mod.rs
View File

@ -164,6 +164,10 @@ impl Mux {
});
}
pub fn shutdown() {
MUX.with(|m| drop(m.borrow_mut().take()));
}
pub fn get() -> Option<Rc<Mux>> {
let mut res = None;
MUX.with(|m| {

4
window/src/connection.rs
View File

@ -7,6 +7,10 @@ thread_local! {
static CONN: RefCell<Option<Rc<Connection>>> = RefCell::new(None);
}
pub fn shutdown() {
CONN.with(|m| drop(m.borrow_mut().take()));
}
pub trait ConnectionOps {
fn get() -> Option<Rc<Connection>> {
let mut res = None;

36
window/src/os/x11/bitmap.rs
View File

@ -1,7 +1,7 @@
use super::*;
use crate::bitmaps::*;
use anyhow::{bail, Context as _};
use std::rc::Rc;
use std::rc::{Rc, Weak};
/// The X protocol allows referencing a number of drawable
/// objects. This trait marks those objects here in code.
@ -17,7 +17,7 @@ impl Drawable for xcb::xproto::Window {
pub struct Context {
gc_id: xcb::xproto::Gcontext,
conn: Rc<XConnection>,
conn: Weak<XConnection>,
drawable: xcb::xproto::Drawable,
}
@ -28,7 +28,7 @@ impl Context {
xcb::create_gc(conn.conn(), gc_id, drawable, &[]);
Context {
gc_id,
conn: Rc::clone(conn),
conn: Rc::downgrade(conn),
drawable,
}
}
@ -46,9 +46,10 @@ impl Context {
dest_y: i16,
width: u16,
height: u16,
) -> xcb::VoidCookie {
) {
let conn = self.conn.upgrade().expect("XConnection to still be live");
xcb::copy_area(
self.conn.conn(),
conn.conn(),
src.as_drawable(),
dest.as_drawable(),
self.gc_id,
@ -58,17 +59,18 @@ impl Context {
dest_y,
width,
height,
)
);
}
/// Send image bytes and render them into the drawable that was used to
/// create this context.
pub fn put_image(&self, dest_x: i16, dest_y: i16, im: &dyn BitmapImage) -> xcb::VoidCookie {
pub fn put_image(&self, dest_x: i16, dest_y: i16, im: &dyn BitmapImage) {
let (width, height) = im.image_dimensions();
let pixel_slice =
unsafe { std::slice::from_raw_parts(im.pixel_data(), width * height * 4) };
let conn = self.conn.upgrade().expect("XConnection to still be live");
xcb::put_image(
self.conn.conn(),
conn.conn(),
xcb::xproto::IMAGE_FORMAT_Z_PIXMAP as u8,
self.drawable,
self.gc_id,
@ -77,15 +79,17 @@ impl Context {
dest_x,
dest_y,
0,
self.conn.depth,
conn.depth,
pixel_slice,
)
);
}
}
impl Drop for Context {
fn drop(&mut self) {
xcb::free_gc(self.conn.conn(), self.gc_id);
if let Some(conn) = self.conn.upgrade() {
xcb::free_gc(conn.conn(), self.gc_id);
}
}
}
@ -157,7 +161,7 @@ pub struct ShmImage {
data: ShmData,
seg_id: xcb::shm::Seg,
draw_id: u32,
conn: Rc<XConnection>,
conn: Weak<XConnection>,
width: usize,
height: usize,
}
@ -202,7 +206,7 @@ impl ShmImage {
data,
seg_id,
draw_id,
conn: Rc::clone(conn),
conn: Rc::downgrade(conn),
width,
height,
})
@ -225,8 +229,10 @@ impl BitmapImage for ShmImage {
impl Drop for ShmImage {
fn drop(&mut self) {
xcb::free_pixmap(self.conn.conn(), self.draw_id);
xcb::shm::detach(self.conn.conn(), self.seg_id);
if let Some(conn) = self.conn.upgrade() {
xcb::free_pixmap(conn.conn(), self.draw_id);
xcb::shm::detach(conn.conn(), self.seg_id);
}
}
}

126
window/src/os/x11/window.rs
View File

@ -13,18 +13,20 @@ use promise::{Future, Promise};
use std::any::Any;
use std::collections::{HashMap, VecDeque};
use std::convert::TryInto;
use std::rc::Rc;
use std::rc::{Rc, Weak};
use std::sync::{Arc, Mutex};
use xcb::ffi::xcb_cursor_t;
struct XcbCursor {
id: xcb_cursor_t,
conn: Rc<XConnection>,
conn: Weak<XConnection>,
}
impl Drop for XcbCursor {
fn drop(&mut self) {
xcb::free_cursor(&self.conn, self.id);
if let Some(conn) = self.conn.upgrade() {
xcb::free_cursor(&conn.conn, self.id);
}
}
}
@ -37,7 +39,7 @@ struct CopyAndPaste {
pub(crate) struct XWindowInner {
window_id: xcb::xproto::Window,
conn: Rc<XConnection>,
conn: Weak<XConnection>,
callbacks: Box<dyn WindowCallbacks>,
window_context: Context,
width: u16,
@ -64,7 +66,9 @@ fn enclosing_boundary_with(a: &Rect, b: &Rect) -> Rect {
impl Drop for XWindowInner {
fn drop(&mut self) {
xcb::destroy_window(self.conn.conn(), self.window_id);
if let Some(conn) = self.conn.upgrade() {
xcb::destroy_window(conn.conn(), self.window_id);
}
}
}
@ -110,9 +114,10 @@ impl XWindowInner {
#[cfg(feature = "opengl")]
fn enable_opengl(&mut self) -> anyhow::Result<()> {
let window = XWindow(self.window_id);
let conn = self.conn();
let gl_state = crate::egl::GlState::create(
Some(self.conn.conn.get_raw_dpy() as *const _),
Some(conn.conn.get_raw_dpy() as *const _),
self.window_id as *mut _,
)
.map(Rc::new)
@ -170,8 +175,9 @@ impl XWindowInner {
let (buf_width, buf_height) = self.buffer_image.image_dimensions();
if buf_width != self.width.into() || buf_height != self.height.into() {
// Window was resized, so we need to update our buffer
let conn = self.conn();
self.buffer_image = BufferImage::new(
&self.conn,
&conn,
self.window_id,
self.width as usize,
self.height as usize,
@ -262,6 +268,8 @@ impl XWindowInner {
return Ok(());
}
let conn = self.conn();
let cursor_id = match self.cursors.get(&cursor) {
Some(cursor) => cursor.id,
None => {
@ -272,12 +280,12 @@ impl XWindowInner {
MouseCursor::Text => 152,
};
let cursor_id: xcb::ffi::xcb_cursor_t = self.conn.generate_id();
let cursor_id: xcb::ffi::xcb_cursor_t = conn.generate_id();
xcb::create_glyph_cursor(
&self.conn,
&conn,
cursor_id,
self.conn.cursor_font_id,
self.conn.cursor_font_id,
conn.cursor_font_id,
conn.cursor_font_id,
id_no,
id_no + 1,
0xffff,
@ -292,7 +300,7 @@ impl XWindowInner {
cursor,
XcbCursor {
id: cursor_id,
conn: Rc::clone(&self.conn),
conn: Rc::downgrade(&conn),
},
);
@ -301,7 +309,7 @@ impl XWindowInner {
};
xcb::change_window_attributes(
&self.conn,
&conn,
self.window_id,
&[(xcb::ffi::XCB_CW_CURSOR, cursor_id)],
);
@ -313,6 +321,7 @@ impl XWindowInner {
pub fn dispatch_event(&mut self, event: &xcb::GenericEvent) -> anyhow::Result<()> {
let r = event.response_type() & 0x7f;
let conn = self.conn();
match r {
xcb::EXPOSE => {
let expose: &xcb::ExposeEvent = unsafe { xcb::cast_event(event) };
@ -331,7 +340,7 @@ impl XWindowInner {
xcb::KEY_PRESS | xcb::KEY_RELEASE => {
let key_press: &xcb::KeyPressEvent = unsafe { xcb::cast_event(event) };
self.copy_and_paste.time = key_press.time();
if let Some((code, mods)) = self.conn.keyboard.process_key_event(key_press) {
if let Some((code, mods)) = conn.keyboard.process_key_event(key_press) {
let key = KeyEvent {
key: code,
raw_key: None,
@ -420,13 +429,13 @@ impl XWindowInner {
}
xcb::CLIENT_MESSAGE => {
let msg: &xcb::ClientMessageEvent = unsafe { xcb::cast_event(event) };
if msg.data().data32()[0] == self.conn.atom_delete() && self.callbacks.can_close() {
xcb::destroy_window(self.conn.conn(), self.window_id);
if msg.data().data32()[0] == conn.atom_delete() && self.callbacks.can_close() {
xcb::destroy_window(conn.conn(), self.window_id);
}
}
xcb::DESTROY_NOTIFY => {
self.callbacks.destroy();
self.conn.windows.borrow_mut().remove(&self.window_id);
conn.windows.borrow_mut().remove(&self.window_id);
}
xcb::SELECTION_CLEAR => {
self.selection_clear()?;
@ -442,7 +451,7 @@ impl XWindowInner {
log::trace!(
"PropertyNotifyEvent atom={} xsel={}",
msg.atom(),
self.conn.atom_xsel_data
conn.atom_xsel_data
);
}
xcb::FOCUS_IN => {
@ -464,30 +473,26 @@ impl XWindowInner {
/// If we own the selection, make sure that the X server reflects
/// that and vice versa.
fn update_selection_owner(&mut self) {
for &selection in &[xcb::ATOM_PRIMARY, self.conn.atom_clipboard] {
let current_owner = xcb::get_selection_owner(&self.conn, selection)
let conn = self.conn();
for &selection in &[xcb::ATOM_PRIMARY, conn.atom_clipboard] {
let current_owner = xcb::get_selection_owner(&conn, selection)
.get_reply()
.unwrap()
.owner();
if self.copy_and_paste.owned.is_none() && current_owner == self.window_id {
// We don't have a selection but X thinks we do; disown it!
xcb::set_selection_owner(
&self.conn,
xcb::NONE,
selection,
self.copy_and_paste.time,
);
xcb::set_selection_owner(&conn, xcb::NONE, selection, self.copy_and_paste.time);
} else if self.copy_and_paste.owned.is_some() && current_owner != self.window_id {
// We have the selection but X doesn't think we do; assert it!
xcb::set_selection_owner(
&self.conn,
&conn,
self.window_id,
selection,
self.copy_and_paste.time,
);
}
}
self.conn.flush();
conn.flush();
}
fn selection_clear(&mut self) -> anyhow::Result<()> {
@ -500,6 +505,7 @@ impl XWindowInner {
/// A selection request is made to us after we've announced that we own the selection
/// and when another client wants to copy it.
fn selection_request(&mut self, request: &xcb::SelectionRequestEvent) -> anyhow::Result<()> {
let conn = self.conn();
log::trace!(
"SEL: time={} owner={} requestor={} selection={} target={} property={}",
request.time(),
@ -511,17 +517,17 @@ impl XWindowInner {
);
log::trace!(
"XSEL={}, UTF8={} PRIMARY={} clip={}",
self.conn.atom_xsel_data,
self.conn.atom_utf8_string,
conn.atom_xsel_data,
conn.atom_utf8_string,
xcb::ATOM_PRIMARY,
self.conn.atom_clipboard,
conn.atom_clipboard,
);
let selprop = if request.target() == self.conn.atom_targets {
let selprop = if request.target() == conn.atom_targets {
// They want to know which targets we support
let atoms: [u32; 1] = [self.conn.atom_utf8_string];
let atoms: [u32; 1] = [conn.atom_utf8_string];
xcb::xproto::change_property(
&self.conn,
&conn,
xcb::xproto::PROP_MODE_REPLACE as u8,
request.requestor(),
request.property(),
@ -532,7 +538,7 @@ impl XWindowInner {
// let the requestor know that we set their property
request.property()
} else if request.target() == self.conn.atom_utf8_string
} else if request.target() == conn.atom_utf8_string
|| request.target() == xcb::xproto::ATOM_STRING
{
// We'll accept requests for UTF-8 or STRING data.
@ -541,7 +547,7 @@ impl XWindowInner {
// the other end is going to handle it correctly.
if let Some(text) = self.copy_and_paste.owned.as_ref() {
xcb::xproto::change_property(
&self.conn,
&conn,
xcb::xproto::PROP_MODE_REPLACE as u8,
request.requestor(),
request.property(),
@ -563,7 +569,7 @@ impl XWindowInner {
log::trace!("responding with selprop={}", selprop);
xcb::xproto::send_event(
&self.conn,
&conn,
true,
request.requestor(),
0,
@ -580,21 +586,23 @@ impl XWindowInner {
}
fn selection_notify(&mut self, selection: &xcb::SelectionNotifyEvent) -> anyhow::Result<()> {
let conn = self.conn();
log::trace!(
"SELECTION_NOTIFY received selection={} (prim={} clip={}) target={} property={}",
selection.selection(),
xcb::ATOM_PRIMARY,
self.conn.atom_clipboard,
conn.atom_clipboard,
selection.target(),
selection.property()
);
if (selection.selection() == xcb::ATOM_PRIMARY
|| selection.selection() == self.conn.atom_clipboard)
|| selection.selection() == conn.atom_clipboard)
&& selection.property() != xcb::NONE
{
match xcb_util::icccm::get_text_property(
&self.conn,
&conn,
selection.requestor(),
selection.property(),
)
@ -604,7 +612,7 @@ impl XWindowInner {
if let Some(mut promise) = self.copy_and_paste.request.take() {
promise.ok(prop.name().to_owned());
}
xcb::delete_property(&self.conn, self.window_id, self.conn.atom_xsel_data);
xcb::delete_property(&conn, self.window_id, conn.atom_xsel_data);
}
Err(err) => {
log::error!("clipboard: err while getting clipboard property: {:?}", err);
@ -646,14 +654,16 @@ impl XWindowInner {
status: 0,
};
let conn = self.conn();
let hints_slice =
unsafe { std::slice::from_raw_parts(&hints as *const _ as *const u32, 5) };
let atom = xcb::intern_atom(self.conn.conn(), false, "_MOTIF_WM_HINTS")
let atom = xcb::intern_atom(conn.conn(), false, "_MOTIF_WM_HINTS")
.get_reply()?
.atom();
xcb::change_property(
self.conn.conn(),
conn.conn(),
xcb::PROP_MODE_REPLACE as u8,
self.window_id,
atom,
@ -663,6 +673,10 @@ impl XWindowInner {
);
Ok(())
}
fn conn(&self) -> Rc<XConnection> {
self.conn.upgrade().expect("XConnection to be alive")
}
}
/// A Window!
@ -757,7 +771,7 @@ impl XWindow {
Arc::new(Mutex::new(XWindowInner {
window_id,
conn: Rc::clone(&conn),
conn: Rc::downgrade(&conn),
callbacks,
window_context,
width: width.try_into()?,
@ -811,11 +825,11 @@ impl Drawable for XWindow {
impl WindowOpsMut for XWindowInner {
fn close(&mut self) {
xcb::destroy_window(self.conn.conn(), self.window_id);
xcb::destroy_window(self.conn().conn(), self.window_id);
}
fn hide(&mut self) {}
fn show(&mut self) {
xcb::map_window(self.conn.conn(), self.window_id);
xcb::map_window(self.conn().conn(), self.window_id);
}
fn set_cursor(&mut self, cursor: Option<MouseCursor>) {
XWindowInner::set_cursor(self, cursor).unwrap();
@ -826,7 +840,7 @@ impl WindowOpsMut for XWindowInner {
fn set_inner_size(&mut self, width: usize, height: usize) {
xcb::configure_window(
self.conn.conn(),
self.conn().conn(),
self.window_id,
&[
(xcb::CONFIG_WINDOW_WIDTH as u16, width as u32),
@ -841,9 +855,10 @@ impl WindowOpsMut for XWindowInner {
// Note that neither this technique or the configure_window
// approach below will successfully move a window running
// under the crostini environment on a chromebook :-(
let conn = self.conn();
xcb_util::ewmh::request_move_resize_window(
self.conn.ewmh_conn(),
self.conn.screen_num,
conn.ewmh_conn(),
conn.screen_num,
self.window_id,
xcb::xproto::GRAVITY_STATIC,
1, // normal program
@ -874,7 +889,7 @@ impl WindowOpsMut for XWindowInner {
/// Change the title for the window manager
fn set_title(&mut self, title: &str) {
xcb_util::icccm::set_wm_name(self.conn.conn(), self.window_id, title);
xcb_util::icccm::set_wm_name(self.conn().conn(), self.window_id, title);
}
fn set_icon(&mut self, image: &dyn BitmapImage) {
@ -890,7 +905,7 @@ impl WindowOpsMut for XWindowInner {
icon_data.extend_from_slice(image.pixels());
xcb_util::ewmh::set_wm_icon(
self.conn.ewmh_conn(),
self.conn().ewmh_conn(),
xcb::PROP_MODE_REPLACE as u8,
self.window_id,
&icon_data,
@ -998,18 +1013,19 @@ impl WindowOps for XWindow {
} else {
log::debug!("prepare promise, time={}", inner.copy_and_paste.time);
inner.copy_and_paste.request.replace(promise);
let conn = inner.conn();
// Find the owner and ask them to send us the buffer
xcb::convert_selection(
&inner.conn,
&conn,
inner.window_id,
// Note that under xwayland, access to the primary selection is
// forbidden by default citing a security concern.
match clipboard {
Clipboard::Clipboard => inner.conn.atom_clipboard,
Clipboard::Clipboard => conn.atom_clipboard,
Clipboard::PrimarySelection => xcb::ATOM_PRIMARY,
},
inner.conn.atom_utf8_string,
inner.conn.atom_xsel_data,
conn.atom_utf8_string,
conn.atom_xsel_data,
inner.copy_and_paste.time,
);
}

4
window/src/os/x_and_wayland.rs
View File

@ -26,9 +26,7 @@ pub enum Window {
Wayland(WaylandWindow),
}
lazy_static::lazy_static! {
static ref ALLOW_WAYLAND: AtomicBool = AtomicBool::new(true);
}
static ALLOW_WAYLAND: AtomicBool = AtomicBool::new(true);
impl Connection {
pub fn disable_wayland() {