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dont deadlock while receiving events

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This commit is contained in:
Raphael Robatsch 2021-10-25 19:02:35 +02:00
parent 0b5710da3e
commit 7298730969
7 changed files with 134 additions and 80 deletions
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6
protocols/net-tapesoftware-dwl-wm-unstable-v1.xml
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@ -66,6 +66,12 @@
<arg name="tag" type="int"/>
<arg name="active" type="int"/>
<arg name="num_clients" type="int"/>
<arg name="urgent" type="int"/>
</event>
<event name="frame">
<description summary="sent after all other events have been sent. allows for atomic updates.">
</description>
</event>
</interface>
</protocol>

46
src/bar.cpp
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@ -27,25 +27,25 @@ static QFont getFont()
font.setBold(fontBold);
return font;
}
static QFont font = getFont();
static QFontMetrics fontMetrics = QFontMetrics {font};
Bar::Bar(const wl_output *output)
: _font {getFont()}
, _fontMetrics {_font}
{
_surface = wl_compositor_create_surface(compositor);
_layerSurface = zwlr_layer_shell_v1_get_layer_surface(wlrLayerShell,
_surface, nullptr, ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM, "net.tapesoftware.Somebar");
zwlr_layer_surface_v1_add_listener(_layerSurface, &_layerSurfaceListener, this);
_surface.reset(wl_compositor_create_surface(compositor));
_layerSurface.reset(zwlr_layer_shell_v1_get_layer_surface(wlrLayerShell,
_surface.get(), nullptr, ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM, "net.tapesoftware.Somebar"));
zwlr_layer_surface_v1_add_listener(_layerSurface.get(), &_layerSurfaceListener, this);
auto anchor = topbar ? ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP : ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM;
zwlr_layer_surface_v1_set_anchor(_layerSurface,
zwlr_layer_surface_v1_set_anchor(_layerSurface.get(),
anchor | ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT);
auto barSize = _fontMetrics.ascent() + _fontMetrics.descent() + paddingY * 2;
_textY = _fontMetrics.ascent() + paddingY;
auto barSize = fontMetrics.ascent() + fontMetrics.descent() + paddingY * 2;
_textY = fontMetrics.ascent() + paddingY;
zwlr_layer_surface_v1_set_size(_layerSurface, 0, barSize);
zwlr_layer_surface_v1_set_exclusive_zone(_layerSurface, barSize);
wl_surface_commit(_surface);
zwlr_layer_surface_v1_set_size(_layerSurface.get(), 0, barSize);
zwlr_layer_surface_v1_set_exclusive_zone(_layerSurface.get(), barSize);
wl_surface_commit(_surface.get());
for (auto tag : tagNames) {
_tags.push_back({ tag, false });
@ -54,11 +54,7 @@ Bar::Bar(const wl_output *output)
_status = "Status";
}
Bar::~Bar()
{
wl_surface_destroy(_surface);
zwlr_layer_surface_v1_destroy(_layerSurface);
}
const wl_surface* Bar::surface() const { return _surface.get(); }
void Bar::click(int x, int)
{
@ -75,9 +71,9 @@ void Bar::invalidate()
{
if (_invalid) return;
_invalid = true;
auto frame = wl_surface_frame(_surface);
auto frame = wl_surface_frame(_surface.get());
wl_callback_add_listener(frame, &_frameListener, this);
wl_surface_commit(_surface);
wl_surface_commit(_surface.get());
}
void Bar::setStatus(const QString &status)
@ -88,7 +84,7 @@ void Bar::setStatus(const QString &status)
void Bar::layerSurfaceConfigure(uint32_t serial, uint32_t width, uint32_t height)
{
zwlr_layer_surface_v1_ack_configure(_layerSurface, serial);
zwlr_layer_surface_v1_ack_configure(_layerSurface.get(), serial);
_bufs.emplace(width, height, WL_SHM_FORMAT_XRGB8888);
render();
}
@ -105,7 +101,7 @@ void Bar::render()
auto painter = QPainter {&img};
_painter = &painter;
_x = 0;
painter.setFont(_font);
painter.setFont(font);
setColorScheme(colorActive);
painter.fillRect(0, 0, img.width(), img.height(), painter.brush());
@ -115,9 +111,9 @@ void Bar::render()
renderStatus();
_painter = nullptr;
wl_surface_attach(_surface, _bufs->buffer(), 0, 0);
wl_surface_damage(_surface, 0, 0, INT_MAX, INT_MAX);
wl_surface_commit(_surface);
wl_surface_attach(_surface.get(), _bufs->buffer(), 0, 0);
wl_surface_damage(_surface.get(), 0, 0, INT_MAX, INT_MAX);
wl_surface_commit(_surface.get());
_bufs->flip();
_invalid = false;
}
@ -156,5 +152,5 @@ void Bar::renderStatus()
int Bar::textWidth(const QString &text)
{
return _fontMetrics.size(Qt::TextSingleLine, text).width();
return fontMetrics.size(Qt::TextSingleLine, text).width();
}

8
src/bar.hpp
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@ -22,11 +22,9 @@ class Bar {
static const zwlr_layer_surface_v1_listener _layerSurfaceListener;
static const wl_callback_listener _frameListener;
wl_surface *_surface {nullptr};
zwlr_layer_surface_v1 *_layerSurface {nullptr};
wl_unique_ptr<wl_surface> _surface;
wl_unique_ptr<zwlr_layer_surface_v1> _layerSurface;
QPainter *_painter {nullptr};
QFont _font;
QFontMetrics _fontMetrics;
std::optional<ShmBuffer> _bufs;
int _textY, _x;
bool _invalid {false};
@ -45,7 +43,7 @@ class Bar {
void invalidate();
public:
explicit Bar(const wl_output *output);
const wl_surface* surface() const;
void setStatus(const QString &status);
void click(int x, int y);
~Bar();
};

16
src/common.hpp
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@ -3,10 +3,12 @@
#pragma once
#include <wayland-client.h>
#include <memory>
#include <vector>
#include <QColor>
#include <QString>
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
#include "net-tapesoftware-dwl-wm-unstable-v1-client-protocol.h"
extern wl_display *display;
extern wl_compositor *compositor;
@ -17,3 +19,17 @@ extern std::vector<QString> tagNames;
struct ColorScheme {
QColor fg, bg;
};
// wayland smart pointers
template<typename T>
struct wl_deleter;
#define WL_DELETER(type, fn) template<> struct wl_deleter<type> { void operator()(type *v) { if(v) fn(v); } }
template<typename T>
using wl_unique_ptr = std::unique_ptr<T, wl_deleter<T>>;
WL_DELETER(wl_surface, wl_surface_destroy);
WL_DELETER(zwlr_layer_surface_v1, zwlr_layer_surface_v1_destroy);
WL_DELETER(wl_buffer, wl_buffer_destroy);
WL_DELETER(wl_output, wl_output_release);
WL_DELETER(znet_tapesoftware_dwl_wm_monitor_v1, znet_tapesoftware_dwl_wm_monitor_v1_release);

114
src/main.cpp
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@ -24,8 +24,8 @@
struct Monitor {
uint32_t name;
wl_output *wlOutput;
znet_tapesoftware_dwl_wm_monitor_v1 *dwlMonitor;
wl_unique_ptr<wl_output> wlOutput;
wl_unique_ptr<znet_tapesoftware_dwl_wm_monitor_v1> dwlMonitor;
std::optional<Bar> bar;
};
@ -42,8 +42,8 @@ wl_shm *shm;
zwlr_layer_shell_v1 *wlrLayerShell;
znet_tapesoftware_dwl_wm_v1 *dwlWm;
std::vector<QString> tagNames;
static bool ready;
static std::vector<Monitor> monitors;
static std::optional<Bar> bar;
static std::string statusFifoName;
static int statusFifoFd {-1};
static int statusFifoWriter {-1};
@ -57,7 +57,7 @@ static const struct xdg_wm_base_listener xdgWmBaseListener = {
}
};
struct PointerState {
struct SeatState {
wl_pointer *pointer;
wl_surface *cursorSurface;
wl_cursor_image *cursorImage;
@ -65,33 +65,40 @@ struct PointerState {
int x, y;
bool leftButtonClick;
};
static PointerState pointerState;
static SeatState seatState;
static Bar* barFromSurface(const wl_surface *surface)
{
auto fbar = std::find_if(begin(monitors), end(monitors), [surface](const Monitor &mon) {
return mon.bar && mon.bar->surface() == surface;
});
return fbar != end(monitors) && fbar->bar ? &*fbar->bar : nullptr;
}
static const struct wl_pointer_listener pointerListener = {
.enter = [](void*, wl_pointer *pointer, uint32_t serial,
wl_surface*, wl_fixed_t x, wl_fixed_t y)
wl_surface *surface, wl_fixed_t x, wl_fixed_t y)
{
pointerState.focusedBar = &bar.value();
wl_pointer_set_cursor(pointer, serial, pointerState.cursorSurface,
pointerState.cursorImage->hotspot_x, pointerState.cursorImage->hotspot_y);
seatState.focusedBar = barFromSurface(surface);
wl_pointer_set_cursor(pointer, serial, seatState.cursorSurface,
seatState.cursorImage->hotspot_x, seatState.cursorImage->hotspot_y);
},
.leave = [](void*, wl_pointer*, uint32_t serial, wl_surface*) {
pointerState.focusedBar = nullptr;
seatState.focusedBar = nullptr;
},
.motion = [](void*, wl_pointer*, uint32_t, wl_fixed_t x, wl_fixed_t y) {
pointerState.x = wl_fixed_to_int(x);
pointerState.y = wl_fixed_to_int(y);
seatState.x = wl_fixed_to_int(x);
seatState.y = wl_fixed_to_int(y);
},
.button = [](void*, wl_pointer*, uint32_t, uint32_t, uint32_t button, uint32_t pressed) {
if (button == BTN_LEFT) {
pointerState.leftButtonClick = pressed == WL_POINTER_BUTTON_STATE_PRESSED;
seatState.leftButtonClick = pressed == WL_POINTER_BUTTON_STATE_PRESSED;
}
},
.axis = [](void*, wl_pointer*, uint32_t, uint32_t, wl_fixed_t) { },
.frame = [](void*, wl_pointer*) {
if (!pointerState.focusedBar) return;
if (pointerState.leftButtonClick) {
pointerState.leftButtonClick = false;
pointerState.focusedBar->click(pointerState.x, pointerState.y);
if (!seatState.focusedBar) return;
if (seatState.leftButtonClick) {
seatState.leftButtonClick = false;
seatState.focusedBar->click(seatState.x, seatState.y);
}
},
.axis_source = [](void*, wl_pointer*, uint32_t) { },
@ -103,16 +110,16 @@ static wl_seat *seat;
static const struct wl_seat_listener seatListener = {
[](void*, wl_seat*, uint32_t cap)
{
if (!pointerState.pointer && WL_SEAT_CAPABILITY_POINTER) {
if (!seatState.pointer && WL_SEAT_CAPABILITY_POINTER) {
auto cursorTheme = wl_cursor_theme_load(NULL, 24, shm);
auto cursorImage = wl_cursor_theme_get_cursor(cursorTheme, "left_ptr")->images[0];
pointerState.cursorImage = cursorImage;
pointerState.cursorSurface = wl_compositor_create_surface(compositor);
wl_surface_attach(pointerState.cursorSurface,
seatState.cursorImage = cursorImage;
seatState.cursorSurface = wl_compositor_create_surface(compositor);
wl_surface_attach(seatState.cursorSurface,
wl_cursor_image_get_buffer(cursorImage), 0, 0);
wl_surface_commit(pointerState.cursorSurface);
pointerState.pointer = wl_seat_get_pointer(seat);
wl_pointer_add_listener(pointerState.pointer, &pointerListener, nullptr);
wl_surface_commit(seatState.cursorSurface);
seatState.pointer = wl_seat_get_pointer(seat);
wl_pointer_add_listener(seatState.pointer, &pointerListener, nullptr);
}
},
[](void*, wl_seat*, const char *name) { }
@ -125,21 +132,26 @@ static const struct znet_tapesoftware_dwl_wm_v1_listener dwlWmListener = {
};
static const struct znet_tapesoftware_dwl_wm_monitor_v1_listener dwlWmMonitorListener {
.tag = [](void*, znet_tapesoftware_dwl_wm_monitor_v1*, int tag, int active, int numClients) {
printf("tag %s: active=%d, num_clients=%d\n", qPrintable(tagNames[tag]), active, numClients);
.tag = [](void*, znet_tapesoftware_dwl_wm_monitor_v1*, int tag, int active, int numClients, int urgent) {
printf("tag %s: active=%d, num_clients=%d, urgent=%d\n", qPrintable(tagNames[tag]), active, numClients, urgent);
},
.frame = [](void *mv, znet_tapesoftware_dwl_wm_monitor_v1*) {
auto mon = static_cast<Monitor*>(mv);
if (!mon->bar) {
mon->bar.emplace(mon->wlOutput.get());
}
}
};
static void setupOutput(Monitor &monitor) {
monitor.dwlMonitor = znet_tapesoftware_dwl_wm_v1_get_monitor(dwlWm, monitor.wlOutput);
znet_tapesoftware_dwl_wm_monitor_v1_add_listener(monitor.dwlMonitor, &dwlWmMonitorListener, &monitor);
monitor.bar.emplace(monitor.wlOutput);
static void setupMonitor(Monitor &monitor) {
monitor.dwlMonitor.reset(znet_tapesoftware_dwl_wm_v1_get_monitor(dwlWm, monitor.wlOutput.get()));
znet_tapesoftware_dwl_wm_monitor_v1_add_listener(monitor.dwlMonitor.get(), &dwlWmMonitorListener, &monitor);
}
static void onOutput(int name, wl_output *output) {
auto& monitor = monitors.emplace_back(name, output);
if (dwlWm) {
setupOutput(monitor);
static void onOutput(uint32_t name, wl_output *output) {
auto& m = monitors.emplace_back(Monitor {name, wl_unique_ptr<wl_output> {output}});
if (ready) {
setupMonitor(m);
}
}
@ -153,10 +165,9 @@ static void onReady()
requireGlobal(dwlWm, "znet_tapesoftware_dwl_wm_v1");
setupStatusFifo();
wl_display_roundtrip(display); // roundtrip so we receive all dwl tags etc.
ready = true;
for (auto& monitor : monitors) {
auto monitor = znet_tapesoftware_dwl_wm_v1_get_monitor(dwlWm, output);
printf("created monitor %p for output %p\n", monitor, output);
bar.emplace(output);
setupMonitor(monitor);
}
}
@ -198,8 +209,10 @@ static void onStatus()
char buffer[512];
auto n = read(statusFifoFd, buffer, sizeof(buffer));
auto str = QString::fromUtf8(buffer, n);
if (bar) {
bar->setStatus(str);
for (auto &monitor : monitors) {
if (monitor.bar) {
monitor.bar->setStatus(str);
}
}
}
@ -230,13 +243,23 @@ static void registryHandleGlobal(void*, wl_registry *registry, uint32_t name, co
wl_seat_add_listener(seat, &seatListener, nullptr);
}
if (wl_output *output; reg.handle(output, wl_output_interface, 1)) {
outputs.push_back(output);
onOutput(name, output);
}
if (reg.handle(dwlWm, znet_tapesoftware_dwl_wm_v1_interface, 1)) {
znet_tapesoftware_dwl_wm_v1_add_listener(dwlWm, &dwlWmListener, nullptr);
}
}
static const struct wl_registry_listener registry_listener = { registryHandleGlobal, nullptr };
static void registryHandleRemove(void*, wl_registry *registry, uint32_t name)
{
auto it = std::find_if(begin(monitors), end(monitors), [name](const Monitor &m) { return m.name == name; });
if (it != end(monitors)) {
monitors.erase(it);
}
}
static const struct wl_registry_listener registry_listener = {
.global = registryHandleGlobal,
.global_remove = registryHandleRemove,
};
int main(int argc, char **argv)
{
@ -273,7 +296,14 @@ int main(int argc, char **argv)
QSocketNotifier displayReadNotifier(wl_display_get_fd(display), QSocketNotifier::Read);
displayReadNotifier.setEnabled(true);
QObject::connect(&displayReadNotifier, &QSocketNotifier::activated, [=]() { wl_display_dispatch(display); });
QObject::connect(&displayReadNotifier, &QSocketNotifier::activated, [=]() {
auto res = wl_display_dispatch(display);
if (res < 0) {
perror("wl_display_dispatch");
cleanup();
exit(1);
}
});
displayWriteNotifier = new QSocketNotifier(wl_display_get_fd(display), QSocketNotifier::Write);
displayWriteNotifier->setEnabled(false);
QObject::connect(displayWriteNotifier, &QSocketNotifier::activated, waylandWriteReady);

13
src/shm_buffer.cpp
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@ -22,20 +22,21 @@ ShmBuffer::ShmBuffer(int w, int h, wl_shm_format format)
close(fd);
for (auto i=0; i<n; i++) {
auto offset = oneSize*i;
auto buffer = wl_shm_pool_create_buffer(pool, offset, width, height, stride, format);
_buffers[i] = { ptr+offset, buffer };
_buffers[i] = {
ptr+offset,
wl_unique_ptr<wl_buffer> { wl_shm_pool_create_buffer(pool, offset, width, height, stride, format) },
};
}
wl_shm_pool_destroy(pool);
}
ShmBuffer::~ShmBuffer()
{
munmap(_buffers[0].data, _totalSize);
for (auto i=0; i<n; i++) {
wl_buffer_destroy(_buffers[i].buffer);
if (_buffers[0].data) {
munmap(_buffers[0].data, _totalSize);
}
}
uint8_t* ShmBuffer::data() const { return _buffers[_current].data; }
wl_buffer* ShmBuffer::buffer() const { return _buffers[_current].buffer; }
wl_buffer* ShmBuffer::buffer() const { return _buffers[_current].buffer.get(); }
void ShmBuffer::flip() { _current = 1-_current; }

11
src/shm_buffer.hpp
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@ -4,22 +4,29 @@
#pragma once
#include <array>
#include <wayland-client.h>
#include "common.hpp"
// double buffered shm
// format is must be 32-bit
class ShmBuffer {
struct Buf {
uint8_t *data {nullptr};
wl_buffer *buffer {nullptr};
wl_unique_ptr<wl_buffer> buffer;
};
std::array<Buf, 2> _buffers;
int _current {0};
size_t _totalSize {0};
public:
int width, height, stride;
explicit ShmBuffer(int width, int height, wl_shm_format format);
ShmBuffer(const ShmBuffer&) = delete;
ShmBuffer(ShmBuffer&&) = default;
ShmBuffer& operator=(const ShmBuffer&) = delete;
ShmBuffer& operator=(ShmBuffer&&) = default;
~ShmBuffer();
uint8_t* data() const;
wl_buffer* buffer() const;
void flip();
~ShmBuffer();
};