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diff --git a/dep/src/zthread/ThreadOps.h b/dep/src/zthread/ThreadOps.h
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+++ b/dep/src/zthread/ThreadOps.h
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+/*
+ * Copyright (c) 2005, Eric Crahen
+ *
+ * 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.
+ *
+ */
+
+#ifndef __ZTTHREADOPSSELECT_H__
+#define __ZTTHREADOPSSELECT_H__
+
+#include "zthread/Config.h"
+
+#if defined(ZT_THREADOPS_IMPLEMENTATION)
+#  error "Reserved symbol defined"
+#endif
+
+
+// Select the correct implementation
+#if defined(ZT_POSIX)
+
+#  include "posix/ThreadOps.h"
+#  define ZT_THREADOPS_IMPLEMENTATION "posix/ThreadOps.cxx"
+
+#elif defined(ZT_WIN32) || defined(ZT_WIN9X)
+
+// Visual C provides the _beginthreadex function, other compilers
+// might not have this if they don't use Microsoft's C runtime. 
+// _beginthreadex is similar to in effect defining REENTRANT on a 
+// POSIX system. CreateThreadEx doesn't use reentrant parts of the  
+// Microsfot C runtime, but if your not using that runtime, no problem.
+
+#  if !defined(HAVE_BEGINTHREADEX)
+#    if defined(_MSC_VER)
+#      define HAVE_BEGINTHREADEX
+#    endif
+#  endif
+
+#  include "win32/ThreadOps.h"
+#  define ZT_THREADOPS_IMPLEMENTATION "win32/ThreadOps.cxx"
+
+#elif defined(ZT_MACOS)
+
+#  include "macos/ThreadOps.h"
+#  define ZT_THREADOPS_IMPLEMENTATION "macos/ThreadOps.cxx"
+
+#endif
+
+#ifndef __ZTTHREADOPS_H__
+#error "No ThreadOps implementation could be selected"
+#endif
+
+#endif // __ZTTHREADOPSSELECT_H__