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threadsafe_queue: Add std::stop_token overload to PopWait
Useful for jthreads which make use of the threadsafe queues.
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2 changed files with 25 additions and 6 deletions
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@ -27,13 +27,13 @@
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#include "common/common_paths.h"
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#include "common/file_util.h"
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#include "common/literals.h"
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#include "common/settings.h"
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#include "common/thread.h"
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#include "common/logging/backend.h"
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#include "common/logging/log.h"
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#include "common/logging/log_entry.h"
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#include "common/logging/text_formatter.h"
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#include "common/settings.h"
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#include "common/string_util.h"
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#include "common/thread.h"
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#include "common/threadsafe_queue.h"
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namespace Common::Log {
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@ -13,8 +13,10 @@
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#include <mutex>
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#include <utility>
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#include "common/polyfill_thread.h"
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namespace Common {
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template <typename T>
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template <typename T, bool with_stop_token = false>
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class SPSCQueue {
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public:
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SPSCQueue() {
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@ -93,6 +95,19 @@ public:
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return t;
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}
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T PopWait(std::stop_token stop_token) {
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if (Empty()) {
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std::unique_lock lock{cv_mutex};
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CondvarWait(cv, lock, stop_token, [this] { return !Empty(); });
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}
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if (stop_token.stop_requested()) {
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return T{};
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}
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T t;
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Pop(t);
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return t;
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}
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// not thread-safe
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void Clear() {
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size.store(0);
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@ -121,13 +136,13 @@ private:
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ElementPtr* read_ptr;
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std::atomic_size_t size{0};
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std::mutex cv_mutex;
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std::condition_variable cv;
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std::conditional_t<with_stop_token, std::condition_variable_any, std::condition_variable> cv;
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};
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// a simple thread-safe,
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// single reader, multiple writer queue
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template <typename T>
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template <typename T, bool with_stop_token = false>
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class MPSCQueue {
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public:
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[[nodiscard]] std::size_t Size() const {
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@ -160,13 +175,17 @@ public:
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return spsc_queue.PopWait();
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}
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T PopWait(std::stop_token stop_token) {
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return spsc_queue.PopWait(stop_token);
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}
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// not thread-safe
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void Clear() {
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spsc_queue.Clear();
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}
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private:
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SPSCQueue<T> spsc_queue;
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SPSCQueue<T, with_stop_token> spsc_queue;
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std::mutex write_lock;
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};
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} // namespace Common
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