Initial boost-regex++ release

[SVN r7845]

src/regex_synch.cpp

@@ -0,0 +1,64 @@
+/*
+ *
+ * Copyright (c) 1998-2000
+ * Dr John Maddock
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Dr John Maddock makes no representations
+ * about the suitability of this software for any purpose.
+ * It is provided "as is" without express or implied warranty.
+ *
+ */
+
+ /*
+  *   LOCATION:    see http://www.boost.org for most recent version.
+  *   FILE:        regex_synch.cpp
+  *   VERSION:     3.00
+  *   DESCRIPTION: Thread synch helper functions, for regular
+  *                expression library.
+  */
+#include <boost/re_detail/regex_synch.hpp>
+
+namespace boost{
+   namespace re_detail{
+
+void BOOST_RE_CALL re_init_threads()
+{
+   BOOST_RE_GUARD_STACK
+#ifdef BOOST_RE_THREADS
+   if(p_re_lock == 0)
+      p_re_lock = new critical_section();
+   cs_guard g(*p_re_lock);
+   ++re_lock_count;
+#endif
+}
+
+void BOOST_RE_CALL re_free_threads()
+{
+   BOOST_RE_GUARD_STACK
+#ifdef BOOST_RE_THREADS
+   cs_guard g(*p_re_lock);
+   --re_lock_count;
+   if(re_lock_count == 0)
+   {
+      g.acquire(false);
+      delete p_re_lock;
+      p_re_lock = 0;
+   }
+#endif
+}
+
+#ifdef BOOST_RE_THREADS
+
+BOOST_RE_IX_DECL critical_section* p_re_lock = 0;
+
+BOOST_RE_IX_DECL unsigned int re_lock_count = 0;
+
+#endif
+
+   } // namespace re_detail
+} // namespace boost
+