mirror of
https://gitee.com/acl-dev/acl.git
synced 2024-12-03 12:28:49 +08:00
78 lines
3.0 KiB
C++
78 lines
3.0 KiB
C++
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1997-2004
|
|
* Sleepycat Software. All rights reserved.
|
|
*
|
|
* $Id: cxx_int.h,v 11.25 2004/09/22 22:20:31 mjc Exp $
|
|
*/
|
|
|
|
#ifndef _CXX_INT_H_
|
|
#define _CXX_INT_H_
|
|
|
|
// private data structures known to the implementation only
|
|
|
|
//
|
|
// 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 (val->get_##_WRAPPED_TYPE()); \
|
|
} \
|
|
\
|
|
inline const _WRAPPED_TYPE *unwrapConst(const _WRAPPER_CLASS *val) \
|
|
{ \
|
|
if (!val) return (0); \
|
|
return (val->get_const_##_WRAPPED_TYPE()); \
|
|
}
|
|
|
|
WRAPPED_CLASS(Db, DbImp, DB)
|
|
WRAPPED_CLASS(DbEnv, DbEnvImp, DB_ENV)
|
|
WRAPPED_CLASS(DbMpoolFile, DbMpoolFileImp, DB_MPOOLFILE)
|
|
WRAPPED_CLASS(DbSequence, DbSequenceImp, DB_SEQUENCE)
|
|
WRAPPED_CLASS(DbTxn, DbTxnImp, DB_TXN)
|
|
|
|
// A tristate integer value used by the DB_ERROR macro below.
|
|
// We chose not to make this an enumerated type so it can
|
|
// be kept private, even though methods that return the
|
|
// tristate int can be declared in db_cxx.h .
|
|
//
|
|
#define ON_ERROR_THROW 1
|
|
#define ON_ERROR_RETURN 0
|
|
#define ON_ERROR_UNKNOWN (-1)
|
|
|
|
// Macros that handle detected errors, in case we want to
|
|
// change the default behavior. The 'policy' is one of
|
|
// the tristate values given above. If UNKNOWN is specified,
|
|
// the behavior is taken from the last initialized DbEnv.
|
|
//
|
|
#define DB_ERROR(env, caller, ecode, policy) \
|
|
DbEnv::runtime_error(env, caller, ecode, policy)
|
|
|
|
#define DB_ERROR_DBT(env, caller, dbt, policy) \
|
|
DbEnv::runtime_error_dbt(env, caller, dbt, policy)
|
|
|
|
#define DB_OVERFLOWED_DBT(dbt) \
|
|
(F_ISSET(dbt, DB_DBT_USERMEM) && dbt->size > dbt->ulen)
|
|
|
|
/* values for Db::flags_ */
|
|
#define DB_CXX_PRIVATE_ENV 0x00000001
|
|
|
|
#endif /* !_CXX_INT_H_ */
|