common: ThreadWorker: Add class to help do asynchronous work.

This commit is contained in:
bunnei 2020-12-29 16:36:35 -08:00
parent c192da3f82
commit 69e82d01d5
3 changed files with 90 additions and 0 deletions

View File

@ -162,6 +162,8 @@ add_library(common STATIC
thread.cpp thread.cpp
thread.h thread.h
thread_queue_list.h thread_queue_list.h
thread_worker.cpp
thread_worker.h
threadsafe_queue.h threadsafe_queue.h
time_zone.cpp time_zone.cpp
time_zone.h time_zone.h

View File

@ -0,0 +1,58 @@
// Copyright 2020 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/thread.h"
#include "common/thread_worker.h"
namespace Common {
ThreadWorker::ThreadWorker(std::size_t num_workers, const std::string& name) {
for (std::size_t i = 0; i < num_workers; ++i)
threads.emplace_back([this, thread_name{std::string{name}}] {
Common::SetCurrentThreadName(thread_name.c_str());
// Wait for first request
{
std::unique_lock lock{queue_mutex};
condition.wait(lock, [this] { return stop || !requests.empty(); });
}
while (true) {
std::function<void()> task;
{
std::unique_lock lock{queue_mutex};
condition.wait(lock, [this] { return stop || !requests.empty(); });
if (stop || requests.empty()) {
return;
}
task = std::move(requests.front());
requests.pop();
}
task();
}
});
}
ThreadWorker::~ThreadWorker() {
{
std::unique_lock lock{queue_mutex};
stop = true;
}
condition.notify_all();
for (std::thread& thread : threads) {
thread.join();
}
}
void ThreadWorker::QueueWork(std::function<void()>&& work) {
{
std::unique_lock lock{queue_mutex};
requests.emplace(work);
}
condition.notify_one();
}
} // namespace Common

View File

@ -0,0 +1,30 @@
// Copyright 2020 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <atomic>
#include <functional>
#include <mutex>
#include <string>
#include <vector>
#include <queue>
namespace Common {
class ThreadWorker final {
public:
explicit ThreadWorker(std::size_t num_workers, const std::string& name);
~ThreadWorker();
void QueueWork(std::function<void()>&& work);
private:
std::vector<std::thread> threads;
std::queue<std::function<void()>> requests;
std::mutex queue_mutex;
std::condition_variable condition;
std::atomic_bool stop{};
};
} // namespace Common