Merge tag 'debian/4.0.0-10' into developdevelop

Bugfix release

1 files changed, 113 insertions, 0 deletions

diff --git a/libcutl/cutl/details/boost/smart_ptr/detail/spinlock_w32.hpp b/libcutl/cutl/details/boost/smart_ptr/detail/spinlock_w32.hpp
new file mode 100644
index 0000000..89031c7
--- /dev/null
+++ b/libcutl/cutl/details/boost/smart_ptr/detail/spinlock_w32.hpp
@@ -0,0 +1,113 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_W32_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SPINLOCK_W32_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  Copyright (c) 2008 Peter Dimov
+//
+//  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)
+//
+
+#include <cutl/details/boost/detail/interlocked.hpp>
+#include <cutl/details/boost/smart_ptr/detail/yield_k.hpp>
+
+// BOOST_COMPILER_FENCE
+
+#if defined(__INTEL_COMPILER)
+
+#define BOOST_COMPILER_FENCE __memory_barrier();
+
+#elif defined( _MSC_VER ) && _MSC_VER >= 1310
+
+extern "C" void _ReadWriteBarrier();
+#pragma intrinsic( _ReadWriteBarrier )
+
+#define BOOST_COMPILER_FENCE _ReadWriteBarrier();
+
+#elif defined(__GNUC__)
+
+#define BOOST_COMPILER_FENCE __asm__ __volatile__( "" : : : "memory" );
+
+#else
+
+#define BOOST_COMPILER_FENCE
+
+#endif
+
+//
+
+namespace cutl_details_boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+    long v_;
+
+public:
+
+    bool try_lock()
+    {
+        long r = BOOST_INTERLOCKED_EXCHANGE( &v_, 1 );
+
+        BOOST_COMPILER_FENCE
+
+        return r == 0;
+    }
+
+    void lock()
+    {
+        for( unsigned k = 0; !try_lock(); ++k )
+        {
+            cutl_details_boost::detail::yield( k );
+        }
+    }
+
+    void unlock()
+    {
+        BOOST_COMPILER_FENCE
+        *const_cast< long volatile* >( &v_ ) = 0;
+    }
+
+public:
+
+    class scoped_lock
+    {
+    private:
+
+        spinlock & sp_;
+
+        scoped_lock( scoped_lock const & );
+        scoped_lock & operator=( scoped_lock const & );
+
+    public:
+
+        explicit scoped_lock( spinlock & sp ): sp_( sp )
+        {
+            sp.lock();
+        }
+
+        ~scoped_lock()
+        {
+            sp_.unlock();
+        }
+    };
+};
+
+} // namespace detail
+} // namespace cutl_details_boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT {0}
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_W32_HPP_INCLUDED