OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

future (_Result_alloc): Derive from _Alloc, exploit the Empty Base Optimization.

Browse Source 
2010-10-08  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/future (_Result_alloc): Derive from _Alloc,
	exploit the Empty Base Optimization.

From-SVN: r165194
This commit is contained in:
Paolo Carlini 2010-10-08 20:30:44 +00:00 committed by Paolo Carlini
parent bd39cb5225
commit 0fd76d8e4c
2 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,8 @@
2010-10-08 Paolo Carlini <paolo.carlini@oracle.com>
* include/std/future (_Result_alloc): Derive from _Alloc,
exploit the Empty Base Optimization.
2010-10-08 Jonathan Wakely <jwakely.gcc@gmail.com>
PR libstdc++/45403

8
libstdc++-v3/include/std/future
View File

@ -215,24 +215,22 @@ namespace std
/// Result_alloc.
template<typename _Res, typename _Alloc>
struct _Result_alloc : _Result<_Res>
struct _Result_alloc : _Result<_Res>, _Alloc
{
typedef typename _Alloc::template rebind<_Result_alloc>::other
__allocator_type;
explicit
_Result_alloc(const _Alloc& __a) : _Result<_Res>(), _M_alloc(__a)
_Result_alloc(const _Alloc& __a) : _Result<_Res>(), _Alloc(__a)
{ }
private:
void _M_destroy()
{
__allocator_type __a(_M_alloc);
__allocator_type __a(*this);
__a.destroy(this);
__a.deallocate(this, 1);
}
__allocator_type _M_alloc;
};
template<typename _Res, typename _Allocator>