119 lines
5.3 KiB
C++
119 lines
5.3 KiB
C++
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1997
|
|
* Sleepycat Software. All rights reserved.
|
|
*
|
|
* @(#)cxx_int.h 10.4 (Sleepycat) 8/22/97
|
|
*/
|
|
|
|
#ifndef _CXX_INT_H_
|
|
#define _CXX_INT_H_
|
|
|
|
// private data structures known to the implementation only
|
|
|
|
#include <assert.h> // used by defines below
|
|
|
|
//
|
|
// Using FooImp classes will allow the implementation to change in the
|
|
// future without any modification to user code or even to header files
|
|
// that the user includes. FooImp * is just like void * except that it
|
|
// provides a little extra protection, since you cannot randomly assign
|
|
// any old pointer to a FooImp* as you can with void *. Currently, a
|
|
// pointer to such an opaque class is always just a pointer to the
|
|
// appropriate underlying implementation struct. These are converted
|
|
// back and forth using the various overloaded wrap()/unwrap() methods.
|
|
// This is essentially a use of the "Bridge" Design Pattern.
|
|
//
|
|
// WRAPPED_CLASS implements the appropriate wrap() and unwrap() methods
|
|
// for a wrapper class that has an underlying pointer representation.
|
|
//
|
|
#define WRAPPED_CLASS(_WRAPPER_CLASS, _IMP_CLASS, _WRAPPED_TYPE) \
|
|
\
|
|
class _IMP_CLASS {}; \
|
|
\
|
|
inline _WRAPPED_TYPE unwrap(_WRAPPER_CLASS *val) \
|
|
{ \
|
|
if (!val) return 0; \
|
|
return (_WRAPPED_TYPE)(val->imp()); \
|
|
} \
|
|
\
|
|
inline const _WRAPPED_TYPE unwrapConst(const _WRAPPER_CLASS *val) \
|
|
{ \
|
|
if (!val) return 0; \
|
|
return (const _WRAPPED_TYPE)(val->imp()); \
|
|
} \
|
|
\
|
|
inline _IMP_CLASS *wrap(_WRAPPED_TYPE val) \
|
|
{ \
|
|
return (_IMP_CLASS*)val; \
|
|
}
|
|
|
|
WRAPPED_CLASS(DbLockTab, DbLockTabImp, DB_LOCKTAB*)
|
|
WRAPPED_CLASS(DbLog, DbLogImp, DB_LOG*)
|
|
WRAPPED_CLASS(DbMpool, DbMpoolImp, DB_MPOOL*)
|
|
WRAPPED_CLASS(DbMpoolFile, DbMpoolFileImp, DB_MPOOLFILE*)
|
|
WRAPPED_CLASS(Db, DbImp, DB*)
|
|
WRAPPED_CLASS(DbTxn, DbTxnImp, DB_TXN*)
|
|
WRAPPED_CLASS(DbTxnMgr, DbTxnMgrImp, DB_TXNMGR*)
|
|
|
|
// Macros that handle detected errors, in case we want to
|
|
// change the default behavior. runtime_error() throws an
|
|
// exception by default.
|
|
//
|
|
// Since it's unusual to throw an exception in a destructor,
|
|
// we have a separate macro. For now, we silently ignore such
|
|
// detected errors.
|
|
//
|
|
#define DB_ERROR(caller, ecode) \
|
|
DbEnv::runtime_error(caller, ecode)
|
|
|
|
#define DB_DESTRUCTOR_ERROR(caller, ecode) \
|
|
DbEnv::runtime_error(caller, ecode, 1)
|
|
|
|
|
|
////////////////////////////////////////////////////////////////
|
|
////////////////////////////////////////////////////////////////
|
|
//
|
|
// These defines are for tedious flag or field set/get access methods.
|
|
//
|
|
|
|
// Define setName() and getName() methods that twiddle
|
|
// the _flags field.
|
|
//
|
|
#define DB_FLAG_METHODS(_class, _flags, _cxx_name, _flag_name) \
|
|
\
|
|
void _class::set##_cxx_name(int onOrOff) \
|
|
{ \
|
|
if (onOrOff) \
|
|
_flags |= _flag_name; \
|
|
else \
|
|
_flags &= ~(_flag_name); \
|
|
} \
|
|
\
|
|
int _class::get##_cxx_name() const \
|
|
{ \
|
|
return (_flags & _flag_name) ? 1 : 0; \
|
|
}
|
|
|
|
|
|
#define DB_RO_ACCESS(_class, _type, _cxx_name, _field) \
|
|
\
|
|
_type _class::get_##_cxx_name() const \
|
|
{ \
|
|
return _field; \
|
|
}
|
|
|
|
#define DB_WO_ACCESS(_class, _type, _cxx_name, _field) \
|
|
\
|
|
void _class::set_##_cxx_name(_type value) \
|
|
{ \
|
|
_field = value; \
|
|
} \
|
|
|
|
#define DB_RW_ACCESS(_class, _type, _cxx_name, _field) \
|
|
DB_RO_ACCESS(_class, _type, _cxx_name, _field) \
|
|
DB_WO_ACCESS(_class, _type, _cxx_name, _field)
|
|
|
|
#endif /* !_CXX_INT_H_ */
|