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nvflinger: Use jthread and stop_token for VSync thread 

Avoids a destruction data race that may occur on the vsync thread
master
ameerj 2021-10-02 00:39:57 +07:00
parent 6c0d902373
commit 71e19153ef
2 changed files with 8 additions and 32 deletions
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29
src/core/hle/service/nvflinger/nvflinger.cpp
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@ -13,28 +13,20 @@
#include "common/thread.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/core_timing_util.h"
#include "core/hardware_properties.h"
#include "core/hle/kernel/k_readable_event.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/service/nvdrv/devices/nvdisp_disp0.h"
#include "core/hle/service/nvdrv/nvdrv.h"
#include "core/hle/service/nvflinger/buffer_queue.h"
#include "core/hle/service/nvflinger/nvflinger.h"
#include "core/hle/service/vi/display/vi_display.h"
#include "core/hle/service/vi/layer/vi_layer.h"
#include "core/perf_stats.h"
#include "video_core/renderer_base.h"
#include "video_core/gpu.h"
namespace Service::NVFlinger {
constexpr auto frame_ns = std::chrono::nanoseconds{1000000000 / 60};
void NVFlinger::VSyncThread(NVFlinger& nv_flinger) {
nv_flinger.SplitVSync();
}
void NVFlinger::SplitVSync() {
void NVFlinger::SplitVSync(std::stop_token stop_token) {
system.RegisterHostThread();
std::string name = "yuzu:VSyncThread";
MicroProfileOnThreadCreate(name.c_str());
@ -45,7 +37,7 @@ void NVFlinger::SplitVSync() {
Common::SetCurrentThreadName(name.c_str());
Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
s64 delay = 0;
while (is_running) {
while (!stop_token.stop_requested()) {
guard->lock();
const s64 time_start = system.CoreTiming().GetGlobalTimeNs().count();
Compose();
@ -55,7 +47,7 @@ void NVFlinger::SplitVSync() {
const s64 next_time = std::max<s64>(0, ticks - time_passed - delay);
guard->unlock();
if (next_time > 0) {
wait_event->WaitFor(std::chrono::nanoseconds{next_time});
std::this_thread::sleep_for(std::chrono::nanoseconds{next_time});
}
delay = (system.CoreTiming().GetGlobalTimeNs().count() - time_end) - next_time;
}
@ -84,9 +76,7 @@ NVFlinger::NVFlinger(Core::System& system_)
});
if (system.IsMulticore()) {
is_running = true;
wait_event = std::make_unique<Common::Event>();
vsync_thread = std::make_unique<std::thread>(VSyncThread, std::ref(*this));
vsync_thread = std::jthread([this](std::stop_token token) { SplitVSync(token); });
} else {
system.CoreTiming().ScheduleEvent(frame_ns, composition_event);
}
@ -96,14 +86,7 @@ NVFlinger::~NVFlinger() {
for (auto& buffer_queue : buffer_queues) {
buffer_queue->Disconnect();
}
if (system.IsMulticore()) {
is_running = false;
wait_event->Set();
vsync_thread->join();
vsync_thread.reset();
wait_event.reset();
} else {
if (!system.IsMulticore()) {
system.CoreTiming().UnscheduleEvent(composition_event, 0);
}
}

11
src/core/hle/service/nvflinger/nvflinger.h
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@ -4,13 +4,10 @@
#pragma once
#include <atomic>
#include <list>
#include <memory>
#include <mutex>
#include <optional>
#include <string>
#include <string_view>
#include <thread>
#include <vector>
@ -109,9 +106,7 @@ private:
/// Creates a layer with the specified layer ID in the desired display.
void CreateLayerAtId(VI::Display& display, u64 layer_id);
static void VSyncThread(NVFlinger& nv_flinger);
void SplitVSync();
void SplitVSync(std::stop_token stop_token);
std::shared_ptr<Nvidia::Module> nvdrv;
@ -133,9 +128,7 @@ private:
Core::System& system;
std::unique_ptr<std::thread> vsync_thread;
std::unique_ptr<Common::Event> wait_event;
std::atomic<bool> is_running{};
std::jthread vsync_thread;
KernelHelpers::ServiceContext service_context;
};