summaryrefslogtreecommitdiffstats
path: root/src/common/thread_worker.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/common/thread_worker.h')
-rw-r--r--src/common/thread_worker.h97
1 files changed, 86 insertions, 11 deletions
diff --git a/src/common/thread_worker.h b/src/common/thread_worker.h
index 12bbf5fef..16aa673bd 100644
--- a/src/common/thread_worker.h
+++ b/src/common/thread_worker.h
@@ -8,32 +8,107 @@
#include <functional>
#include <mutex>
#include <string>
+#include <type_traits>
#include <vector>
#include <queue>
-#include "common/common_types.h"
+#include "common/thread.h"
#include "common/unique_function.h"
namespace Common {
-class ThreadWorker final {
+template <class StateType = void>
+class StatefulThreadWorker {
+ static constexpr bool with_state = !std::is_same_v<StateType, void>;
+
+ struct DummyCallable {
+ int operator()() const noexcept {
+ return 0;
+ }
+ };
+
+ using Task =
+ std::conditional_t<with_state, UniqueFunction<void, StateType*>, UniqueFunction<void>>;
+ using StateMaker = std::conditional_t<with_state, std::function<StateType()>, DummyCallable>;
+
public:
- explicit ThreadWorker(std::size_t num_workers, const std::string& name);
- ~ThreadWorker();
- void QueueWork(UniqueFunction<void> work);
- void WaitForRequests();
+ explicit StatefulThreadWorker(size_t num_workers, std::string name, StateMaker func = {})
+ : workers_queued{num_workers}, thread_name{std::move(name)} {
+ const auto lambda = [this, func] {
+ Common::SetCurrentThreadName(thread_name.c_str());
+ {
+ std::conditional_t<with_state, StateType, int> state{func()};
+ while (!stop) {
+ Task task;
+ {
+ std::unique_lock lock{queue_mutex};
+ if (requests.empty()) {
+ wait_condition.notify_all();
+ }
+ condition.wait(lock, [this] { return stop || !requests.empty(); });
+ if (stop) {
+ break;
+ }
+ task = std::move(requests.front());
+ requests.pop();
+ }
+ if constexpr (with_state) {
+ task(&state);
+ } else {
+ task();
+ }
+ ++work_done;
+ }
+ }
+ ++workers_stopped;
+ wait_condition.notify_all();
+ };
+ for (size_t i = 0; i < num_workers; ++i) {
+ threads.emplace_back(lambda);
+ }
+ }
+
+ ~StatefulThreadWorker() {
+ {
+ std::unique_lock lock{queue_mutex};
+ stop = true;
+ }
+ condition.notify_all();
+ for (std::thread& thread : threads) {
+ thread.join();
+ }
+ }
+
+ void QueueWork(Task work) {
+ {
+ std::unique_lock lock{queue_mutex};
+ requests.emplace(std::move(work));
+ ++work_scheduled;
+ }
+ condition.notify_one();
+ }
+
+ void WaitForRequests() {
+ std::unique_lock lock{queue_mutex};
+ wait_condition.wait(lock, [this] {
+ return workers_stopped >= workers_queued || work_done >= work_scheduled;
+ });
+ }
private:
std::vector<std::thread> threads;
- std::queue<UniqueFunction<void>> requests;
+ std::queue<Task> requests;
std::mutex queue_mutex;
std::condition_variable condition;
std::condition_variable wait_condition;
std::atomic_bool stop{};
- std::atomic<u64> work_scheduled{};
- std::atomic<u64> work_done{};
- std::atomic<u64> workers_stopped{};
- std::atomic<u64> workers_queued{};
+ std::atomic<size_t> work_scheduled{};
+ std::atomic<size_t> work_done{};
+ std::atomic<size_t> workers_stopped{};
+ std::atomic<size_t> workers_queued{};
+ std::string thread_name;
};
+using ThreadWorker = StatefulThreadWorker<>;
+
} // namespace Common