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objectheader.h
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objectheader.h
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#ifndef __OBJECTHEADER_H__
#define __OBJECTHEADER_H__
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* @file objectheader.h
* @brief Heap object header.
* @author Emery Berger <http://www.cs.umass.edu/~emery>
* @author Tongping Liu <http://www.cs.umass.edu/~tonyliu>
*/
class objectHeader {
public:
enum {
MAGIC = 0xCAFEBABE
};
objectHeader(size_t sz) :
_size(sz), _magic(MAGIC) {
}
size_t getSize(void) {
sanityCheck();
return _size;
}
bool isValidObject(void) {
bool ret = false;
ret = sanityCheck();
if (ret == true) {
// fprintf(stderr, "isValidObject with size %d\n", _size);
// FIXME: _size should be multiple of 8s according to our heap implementation.
ret = (_size % 8 == 0) ? true : false;
}
return ret;
}
bool verifyMagic(void) {
if (_magic == MAGIC)
return (true);
else
return (false);
}
private:
bool sanityCheck(void) {
if (_magic != MAGIC) {
fprintf(stderr, "HLY FK in %d. Current _magic %ld at %p\n", getpid(), _magic, &_magic);
::abort();
}
return true;
}
size_t _magic;
size_t _size;
};
#endif /* __OBJECTHEADER_H__ */