added mysql source for win build

--HG--
branch : trunk

externals/mysql/extlib/yassl/include/lock.hpp

@@ -0,0 +1,87 @@
+/*
+   Copyright (C) 2000-2007 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING. If not, write to the
+   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+   MA  02110-1301  USA.
+*/
+
+/* lock.hpp provides an os specific Lock, locks mutex on entry and unlocks
+ * automatically upon exit, no-ops provided for Single Threaded
+*/
+
+#ifndef yaSSL_LOCK_HPP
+#define yaSSL_LOCK_HPP
+
+
+namespace yaSSL {
+
+
+#ifdef MULTI_THREADED
+    #ifdef _WIN32
+        #include <windows.h>
+
+        class Mutex {
+            CRITICAL_SECTION cs_;
+        public:
+            Mutex();
+            ~Mutex();
+
+            class Lock;
+            friend class Lock;
+    
+            class Lock {
+                Mutex& mutex_;
+            public:
+                explicit Lock(Mutex& lm);
+                ~Lock();
+            };
+        };
+    #else  // _WIN32
+        #include <pthread.h>
+
+        class Mutex {
+            pthread_mutex_t mutex_;
+        public:
+
+            Mutex();
+            ~Mutex();
+
+            class Lock;
+            friend class Lock;
+
+            class Lock {
+                Mutex& mutex_;
+            public:
+                explicit Lock(Mutex& lm);
+                ~Lock();
+            };
+        };
+
+    #endif // _WIN32
+#else  // MULTI_THREADED (WE'RE SINGLE)
+
+    class Mutex {
+    public:
+        class Lock {
+        public:
+            explicit Lock(Mutex&) {}
+        };
+    };
+
+#endif // MULTI_THREADED
+
+
+
+} // namespace
+#endif // yaSSL_LOCK_HPP