import(life): IMPORT crupest/life COMPLETE.

1 files changed, 47 insertions, 0 deletions

diff --git a/works/life/operating-system-experiment/Semaphore.h b/works/life/operating-system-experiment/Semaphore.h
new file mode 100644
index 0000000..430c036
--- /dev/null
+++ b/works/life/operating-system-experiment/Semaphore.h
@@ -0,0 +1,47 @@
+#ifndef HEADER_SEMAPHORE_H
+#define HEADER_SEMAPHORE_H
+
+#include "Base.h"
+
+#include <memory>
+
+#ifdef CRU_WINDOWS
+#include <Windows.h>
+#else
+#include <semaphore.h>
+#endif
+
+namespace cru {
+class CRU_API Semaphore {
+public:
+  explicit Semaphore(unsigned init_value = 1);
+
+  Semaphore(const Semaphore &other) = delete;
+  Semaphore &operator=(const Semaphore &other) = delete;
+
+  Semaphore(Semaphore &&other);
+  Semaphore &operator=(Semaphore &&other);
+
+  ~Semaphore();
+
+public:
+  void P();
+  void V();
+
+  void Acquire();
+  bool TryAcquire();
+  void Release();
+
+private:
+  void Destroy();
+
+private:
+#ifdef CRU_WINDOWS
+  HANDLE handle_ = nullptr;
+#else
+  std::unique_ptr<sem_t> semaphore_;
+#endif
+};
+} // namespace cru
+
+#endif
\ No newline at end of file