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+/**************************************************************************
+ *
+ * Copyright 2010 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/*
+ * Simple OS abstraction layer.
+ */
+
+#ifndef _OS_HPP_
+#define _OS_HPP_
+
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+#ifdef _WIN32
+#ifndef snprintf
+#define snprintf _snprintf
+#endif
+#ifndef vsnprintf
+#define vsnprintf _vsnprintf
+#endif
+#define PATH_SEP '\\'
+#else /* !_WIN32 */
+#define PATH_SEP '/'
+#endif /* !_WIN32 */
+
+#ifndef PATH_MAX
+#define PATH_MAX 1024
+#endif
+
+namespace OS {
+
+void AcquireMutex(void);
+
+void ReleaseMutex(void);
+
+bool GetProcessName(char *str, size_t size);
+bool GetCurrentDir(char *str, size_t size);
+
+void DebugMessage(const char *format, ...)
+#ifdef __GNUC__
+    __attribute__ ((format (printf, 1, 2)))
+#endif
+;
+
+#if defined _WIN32 || defined __CYGWIN__
+  /* We always use .def files on windows for now */
+  #if 0
+  #define PUBLIC __declspec(dllexport)
+  #else
+  #define PUBLIC
+  #endif
+  #define PRIVATE
+#else
+  #if __GNUC__ >= 4
+    #define PUBLIC __attribute__ ((visibility("default")))
+    #define PRIVATE __attribute__ ((visibility("hidden")))
+  #else
+    #define PUBLIC
+    #define PRIVATE
+  #endif
+#endif
+
+/**
+ * Get the current time in microseconds from an unknown base.
+ */
+long long GetTime(void);
+
+void Abort(void);
+
+void SetExceptionCallback(void (*callback)(void));
+void ResetExceptionCallback(void);
+
+} /* namespace OS */
+
+#endif /* _OS_HPP_ */