1 files changed, 27 insertions, 0 deletions
diff --git a/test/semaphore.h b/test/semaphore.h
new file mode 100644
index 0000000..f2e9355
--- /dev/null
+++ b/test/semaphore.h
@@ -0,0 +1,27 @@
+#ifndef MYGRATE_TEST_SEMAPHORE_H
+#define MYGRATE_TEST_SEMAPHORE_H
+
+#if __has_include(<semaphore>)
+#	include <semaphore>
+#endif
+
+#ifdef __cpp_lib_semaphore
+using semaphore = std::binary_semaphore;
+#else
+#	include <mutex>
+class semaphore {
+public:
+	semaphore(unsigned int v_);
+
+	void release(unsigned int n = 1);
+
+	void acquire();
+
+private:
+	bool try_dec();
+	unsigned int v;
+	std::mutex m;
+};
+#endif
+
+#endif