OSS_INLINE INT32 _dmsStorageData::getMBContext( dmsMBContext ** pContext,
UINT16 mbID, UINT32 clLID,
INT32 lockType )
{
if ( mbID >= DMS_MME_SLOTS )
{
return SDB_INVALIDARG ;
}
if ( (UINT32)DMS_INVALID_CLID == clLID )
{
_metadataLatch.get_shared() ;
clLID = _dmsMME->_mbList[mbID]._logicalID ;
_metadataLatch.release_shared() ;
}
_latchContext.get() ;
if ( _vecContext.size () > 0 )
{
*pContext = _vecContext.back () ;
_vecContext.pop_back () ;
}
else
{
*pContext = SDB_OSS_NEW dmsMBContext ;
}
_latchContext.release() ;
if ( !(*pContext) )
{
return SDB_OOM ;
}
(*pContext)->_clLID = clLID ;
(*pContext)->_mbID = mbID ;
(*pContext)->_mb = &_dmsMME->_mbList[mbID] ;
(*pContext)->_mbStat = &_mbStatInfo[mbID] ;
(*pContext)->_latch = &_mblock[mbID] ;
if ( SHARED == lockType || EXCLUSIVE == lockType )
{
return (*pContext)->mbLock( lockType ) ;
}
return SDB_OK ;
}
OSS_INLINE void _dmsStorageData::releaseMBContext( dmsMBContext *&pContext )
{
if ( !pContext )
{
return ;
}
pContext->mbUnlock() ;
_latchContext.get() ;
if ( _vecContext.size() < DMS_CONTEXT_MAX_SIZE )
{
pContext->_reset() ;
_vecContext.push_back( pContext ) ;
}
else
{
SDB_OSS_DEL pContext ;
}
_latchContext.release() ;
pContext = NULL ;
}
/*
IXM Tool functions
*/
BSONObj ixmGetUndefineKeyObj( INT32 fieldNum )
{
static BSONObj s_undefineKeys[ IXM_MAX_PREALLOCATED_UNDEFKEY ] ;
static BOOLEAN s_init = FALSE ;
static ossSpinXLatch s_latch ;
if ( FALSE == s_init )
{
s_latch.get() ;
if ( FALSE == s_init )
{
for ( SINT32 i = 0; i < IXM_MAX_PREALLOCATED_UNDEFKEY ; ++i )
{
BSONObjBuilder b ;
for ( SINT32 j = 0; j <= i; ++j )
{
b.appendUndefined("") ;
}
s_undefineKeys[i] = b.obj() ;
}
s_init = TRUE ;
}
s_latch.release() ;
}
if ( fieldNum > 0 && fieldNum <= IXM_MAX_PREALLOCATED_UNDEFKEY )
{
return s_undefineKeys[ fieldNum - 1 ] ;
}
else
{
BSONObjBuilder b ;
for ( INT32 i = 0; i < fieldNum; ++i )
{
b.appendUndefined("") ;
}
return b.obj() ;
}
}
HANDLE ossGetSysMutexHandle( SYS_MUTEX_TYPE type )
{
static HANDLE s_sysMutexes[ _NumOfFunctions ] = {0} ;
static BOOLEAN s_init = FALSE ;
static ossSpinXLatch s_latch ;
if ( FALSE == s_init )
{
s_latch.get() ;
if ( FALSE == s_init )
{
for ( int i = _SymInitialize; i < _NumOfFunctions ; i++ )
{
if ( ! s_sysMutexes[i] )
{
if ( i != _SymCleanup )
{
s_sysMutexes[i] = CreateMutex( NULL, // default security attr
false, // initially not owned
NULL ) ; // unnamed mutex
}
else
{
s_sysMutexes[i] = s_sysMutexes[ _SymInitialize ] ;
}
}
}
s_init = TRUE ;
}
s_latch.release() ;
}
if ( type >= _SymInitialize && type < _NumOfFunctions )
{
return s_sysMutexes[ (INT32)type ] ;
}
SDB_ASSERT( FALSE, "Invalid sys mutex type" ) ;
return 0 ;
}
void unlock()
{
_isLock = FALSE ;
_inLatch.release() ;
}
void lock()
{
_inLatch.get() ;
_isLock = TRUE ;
}
