initial commit of boost.context

[SVN r76974]

src/fcontext.cpp

@@ -0,0 +1,38 @@
+
+//          Copyright Oliver Kowalke 2009.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+#define BOOST_CONTEXT_SOURCE
+
+#include <boost/context/fcontext.hpp>
+
+#include <cstddef>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_PREFIX
+#endif
+
+namespace boost {
+namespace contexts {
+
+extern "C" BOOST_CONTEXT_DECL void * BOOST_CONTEXT_CALLDECL boost_fcontext_align( void * vp)
+{
+	void * base = vp;
+    if ( 0 != ( ( ( uintptr_t) base) & 15) )
+        base = ( char * )(
+            ( ( ( ( uintptr_t) base) - 16) >> 4) << 4);
+	return base;
+}
+
+# if !defined(__arm__) && !defined(__powerpc__)
+extern "C" BOOST_CONTEXT_DECL intptr_t BOOST_CONTEXT_CALLDECL boost_fcontext_start( boost_fcontext_t * ofc, boost_fcontext_t const* nfc)
+{ return boost_fcontext_jump( ofc, nfc, 0); }
+#endif
+
+}}
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif