Merge with trunk.

[SVN r44810]

include/boost/detail/lightweight_thread.hpp

@@ -0,0 +1,135 @@
+#ifndef BOOST_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED
+#define BOOST_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  boost/detail/lightweight_thread.hpp
+//
+//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
+//  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 <boost/config.hpp>
+#include <memory>
+#include <cerrno>
+
+// pthread_create, pthread_join
+
+#if defined( BOOST_HAS_PTHREADS )
+
+#include <pthread.h>
+
+#else
+
+#include <windows.h>
+#include <process.h>
+
+typedef HANDLE pthread_t;
+
+int pthread_create( pthread_t * thread, void const *, unsigned (__stdcall * start_routine) (void*), void* arg )
+{
+    HANDLE h = (HANDLE)_beginthreadex( 0, 0, start_routine, arg, 0, 0 );
+
+    if( h != 0 )
+    {
+        *thread = h;
+        return 0;
+    }
+    else
+    {
+        return EAGAIN;
+    }
+}
+
+int pthread_join( pthread_t thread, void ** /*value_ptr*/ )
+{
+    ::WaitForSingleObject( thread, INFINITE );
+    ::CloseHandle( thread );
+    return 0;
+}
+
+#endif
+
+// template<class F> int lw_thread_create( pthread_t & pt, F f );
+
+namespace boost
+{
+
+namespace detail
+{
+
+class lw_abstract_thread
+{
+public:
+
+    virtual ~lw_abstract_thread() {}
+    virtual void run() = 0;
+};
+
+#if defined( BOOST_HAS_PTHREADS )
+
+extern "C" void * lw_thread_routine( void * pv )
+{
+    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+    pt->run();
+
+    return 0;
+}
+
+#else
+
+unsigned __stdcall lw_thread_routine( void * pv )
+{
+    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+    pt->run();
+
+    return 0;
+}
+
+#endif
+
+template<class F> class lw_thread_impl: public lw_abstract_thread
+{
+public:
+
+    explicit lw_thread_impl( F f ): f_( f )
+    {
+    }
+
+    void run()
+    {
+        f_();
+    }
+
+private:
+
+    F f_;
+};
+
+template<class F> int lw_thread_create( pthread_t & pt, F f )
+{
+    std::auto_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
+
+    int r = pthread_create( &pt, 0, lw_thread_routine, p.get() );
+
+    if( r == 0 )
+    {
+        p.release();
+    }
+
+    return r;
+}
+
+} // namespace detail
+} // namespace boost
+
+#endif // #ifndef BOOST_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED