1 files changed, 86 insertions, 0 deletions
diff --git a/libs/context/src/stack_allocator_windows.cpp b/libs/context/src/stack_allocator_windows.cpp
new file mode 100644
index 0000000000..518239f0e3
--- /dev/null
+++ b/libs/context/src/stack_allocator_windows.cpp
@@ -0,0 +1,86 @@
+
+//          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/stack_allocator.hpp>
+
+extern "C" {
+#include <windows.h>
+}
+
+#include <stdexcept>
+
+#include <boost/config.hpp>
+#include <boost/assert.hpp>
+#include <boost/cstdint.hpp>
+#include <boost/format.hpp>
+
+#include <boost/context/stack_utils.hpp>
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_PREFIX
+#endif
+
+# if defined(BOOST_MSVC)
+# pragma warning(push)
+# pragma warning(disable:4244 4267)
+# endif
+
+namespace boost {
+namespace ctx {
+
+void *
+stack_allocator::allocate( std::size_t size) const
+{
+    if ( minimum_stacksize() > size)
+        throw std::invalid_argument(
+            boost::str( boost::format("invalid stack size: must be at least %d bytes")
+                % minimum_stacksize() ) );
+
+    if ( ! is_stack_unbound() && ( maximum_stacksize() < size) )
+        throw std::invalid_argument(
+            boost::str( boost::format("invalid stack size: must not be larger than %d bytes")
+                % maximum_stacksize() ) );
+
+    const std::size_t pages( page_count( size) + 1); // add +1 for guard page
+    std::size_t size_ = pages * pagesize();
+
+#ifndef BOOST_CONTEXT_FIBER
+    void * limit = ::VirtualAlloc( 0, size_, MEM_COMMIT, PAGE_READWRITE);
+    if ( ! limit) throw std::bad_alloc();
+
+    DWORD old_options;
+    const BOOL result = ::VirtualProtect(
+        limit, pagesize(), PAGE_READWRITE | PAGE_GUARD /*PAGE_NOACCESS*/, & old_options);
+    BOOST_ASSERT( FALSE != result);
+
+    return static_cast< char * >( limit) + size_;
+#endif
+}
+
+void
+stack_allocator::deallocate( void * vp, std::size_t size) const
+{
+    if ( vp)
+    {
+        const std::size_t pages( page_count( size) + 1); // add +1 for guard page
+        std::size_t size_ = pages * pagesize();
+        BOOST_ASSERT( 0 < size && 0 < size_);
+        void * limit = static_cast< char * >( vp) - size_;
+        ::VirtualFree( limit, 0, MEM_RELEASE);
+    }
+}
+
+}}
+
+# if defined(BOOST_MSVC)
+# pragma warning(pop)
+# endif
+
+#ifdef BOOST_HAS_ABI_HEADERS
+#  include BOOST_ABI_SUFFIX
+#endif