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// Copyright 2020 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <condition_variable>
#include <functional>
#include <mutex>
#include <thread>
#include <vector>
#include <queue>
#include "common/assert.h"
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/server_session.h"
#include "core/hle/kernel/service_thread.h"
#include "core/hle/lock.h"
#include "video_core/renderer_base.h"
namespace Kernel {
class ServiceThread::Impl final {
public:
explicit Impl(KernelCore& kernel, std::size_t num_threads);
~Impl();
void QueueSyncRequest(ServerSession& session, std::shared_ptr<HLERequestContext>&& context);
private:
std::vector<std::thread> threads;
std::queue<std::function<void()>> requests;
std::mutex queue_mutex;
std::condition_variable condition;
bool stop{};
};
ServiceThread::Impl::Impl(KernelCore& kernel, std::size_t num_threads) {
for (std::size_t i = 0; i < num_threads; ++i)
threads.emplace_back([&] {
// Wait for first request before trying to acquire a render context
{
std::unique_lock lock{queue_mutex};
condition.wait(lock, [this] { return stop || !requests.empty(); });
}
kernel.RegisterHostThread();
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();
}
});
}
void ServiceThread::Impl::QueueSyncRequest(ServerSession& session,
std::shared_ptr<HLERequestContext>&& context) {
{
std::unique_lock lock{queue_mutex};
requests.emplace([session{SharedFrom(&session)}, context{std::move(context)}]() {
session->CompleteSyncRequest(*context);
return;
});
}
condition.notify_one();
}
ServiceThread::Impl::~Impl() {
{
std::unique_lock lock{queue_mutex};
stop = true;
}
condition.notify_all();
for (std::thread& thread : threads) {
thread.join();
}
}
ServiceThread::ServiceThread(KernelCore& kernel, std::size_t num_threads)
: impl{std::make_unique<Impl>(kernel, num_threads)} {}
ServiceThread::~ServiceThread() = default;
void ServiceThread::QueueSyncRequest(ServerSession& session,
std::shared_ptr<HLERequestContext>&& context) {
impl->QueueSyncRequest(session, std::move(context));
}
} // namespace Kernel
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