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Telegram/lib_crl/crl/dispatch/crl_dispatch_semaphore.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/dispatch/crl_dispatch_semaphore.h>
+
+#ifdef CRL_USE_DISPATCH
+
+#include <dispatch/dispatch.h>
+#include <exception>
+
+namespace crl {
+namespace {
+
+dispatch_semaphore_t Unwrap(void *value) {
+	return static_cast<dispatch_semaphore_t>(value);
+}
+
+} // namespace
+
+auto semaphore::implementation::create() -> pointer {
+	auto result = dispatch_semaphore_create(0);
+	if (!result) {
+		std::terminate();
+	}
+	return result;
+}
+
+void semaphore::implementation::operator()(pointer value) {
+	if (value) {
+		dispatch_release(Unwrap(value));
+	}
+};
+
+void semaphore::acquire() {
+	dispatch_semaphore_wait(Unwrap(_handle.get()), DISPATCH_TIME_FOREVER);
+}
+
+void semaphore::release() {
+	dispatch_semaphore_signal(Unwrap(_handle.get()));
+}
+
+} // namespace crl
+
+#endif // CRL_USE_DISPATCH