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Telegram/lib_crl/crl/common/crl_common_queue.cpp

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#include <crl/crl_queue.h>
+
+#ifdef CRL_USE_COMMON_QUEUE
+
+#include <crl/crl_async.h>
+#include <crl/crl_fp_exceptions.h>
+
+namespace crl {
+
+queue::queue() = default;
+
+queue::queue(main_queue_processor processor) : _main_processor(processor) {
+}
+
+void queue::wake_async() {
+	if (!_queued.test_and_set()) {
+		(_main_processor ? _main_processor : details::async_plain)(
+			ProcessCallback,
+			static_cast<void*>(this));
+	}
+}
+
+void queue::process() {
+	if (!_list.process()) {
+		return;
+	}
+	_queued.clear();
+
+	if (!_list.empty()) {
+		wake_async();
+	}
+}
+
+void queue::ProcessCallback(void *that) {
+#ifdef CRL_THROW_FP_EXCEPTIONS
+	static thread_local const bool kInited = [] {
+		toggle_fp_exceptions(true);
+		return true;
+	}();
+#endif // CRL_THROW_FP_EXCEPTIONS
+
+	static_cast<queue*>(that)->process();
+}
+
+} // namespace crl
+
+#endif // CRL_USE_COMMON_QUEUE