69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
|
/*
|
||
|
|
* Copyright (c) 2008 The Hewlett-Packard Development Company
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions are
|
||
|
|
* met: redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer;
|
||
|
|
* redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution;
|
||
|
|
* neither the name of the copyright holders nor the names of its
|
||
|
|
* contributors may be used to endorse or promote products derived from
|
||
|
|
* this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* Authors: Nathan Binkert
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __BASE_CAST_HH__
|
||
|
|
#define __BASE_CAST_HH__
|
||
|
|
|
||
|
|
#include <cassert>
|
||
|
|
|
||
|
|
// This is designed for situations where we have a pointer to a base
|
||
|
|
// type, but in all cases when we cast it to a derived type, we know
|
||
|
|
// by construction that it should work correctly.
|
||
|
|
|
||
|
|
#if defined(DEBUG)
|
||
|
|
|
||
|
|
// In debug builds, do the dynamic cast and assert the result is good
|
||
|
|
|
||
|
|
template <class T, class U>
|
||
|
|
inline T
|
||
|
|
safe_cast(U ptr)
|
||
|
|
{
|
||
|
|
T ret = dynamic_cast<T>(ptr);
|
||
|
|
assert(ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
// In non debug builds statically cast the result to the pointer we
|
||
|
|
// want to use. This is technically unsafe, but this is only for
|
||
|
|
// cases where we know that this should work by construction.
|
||
|
|
|
||
|
|
template <class T, class U>
|
||
|
|
inline T
|
||
|
|
safe_cast(U ptr)
|
||
|
|
{
|
||
|
|
return static_cast<T>(ptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // __BASE_CAST_HH__
|