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venv/Lib/site-packages/greenlet/greenlet_thread_support.hpp

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+#ifndef GREENLET_THREAD_SUPPORT_HPP
+#define GREENLET_THREAD_SUPPORT_HPP
+
+/**
+ * Defines various utility functions to help greenlet integrate well
+ * with threads. This used to be needed when we supported Python
+ * 2.7 on Windows, which used a very old compiler. We wrote an
+ * alternative implementation using Python APIs and POSIX or Windows
+ * APIs, but that's no longer needed. So this file is a shadow of its
+ * former self --- but may be needed in the future.
+ */
+
+#include <stdexcept>
+#include <thread>
+#include <mutex>
+
+#include "greenlet_compiler_compat.hpp"
+
+namespace greenlet {
+    typedef std::mutex Mutex;
+    typedef std::lock_guard<Mutex> LockGuard;
+    class LockInitError : public std::runtime_error
+    {
+    public:
+        LockInitError(const char* what) : std::runtime_error(what)
+        {};
+    };
+};
+
+
+#endif /* GREENLET_THREAD_SUPPORT_HPP */