greenplumn init 代码
文件路径：/src/backend/gporca/libgpopt/src/init.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 Greenplum, Inc.
/
/ @filename:
/ init.cpp
/
/ @doc:
/ Implementation of initialization and termination functions for
/ libgpopt.
/---------------------------------------------------------------------------
#include "gpopt/init.h"
#include "gpos/_api.h"
#include "gpos/memory/CAutoMemoryPool.h"
#include "gpos/task/CWorker.h"
#include "gpopt/exception.h"
#include "gpopt/mdcache/CMDCache.h"
#include "gpopt/xforms/CXformFactory.h"
#include "naucrates/init.h"
using namespace gpos;
using namespace gpopt;
static CMemoryPool *mp = nullptr;
/---------------------------------------------------------------------------
/ @function:
/ gpopt_init
/
/ @doc:
/ Initialize gpopt library. To enable memory allocations
/ via a custom allocator, pass in non-NULL fnAlloc/fnFree
/ allocation/deallocation functions. If either of the parameters
/ are NULL, gpopt with be initialized with the default allocator.
/
/---------------------------------------------------------------------------
void
gpopt_init()
{
{
CAutoMemoryPool amp;
mp = amp.Pmp();
/ add standard exception messages
(void) gpopt::EresExceptionInit(mp);
/ detach safety
(void) amp.Detach();
}
if (GPOS_OK != gpopt::CXformFactory::Init())
{
return;
}
}
/---------------------------------------------------------------------------
/ @function:
/ gpopt_terminate
/
/ @doc:
/ Destroy the memory pool
/
/---------------------------------------------------------------------------
void
gpopt_terminate()
{
#ifdef GPOS_DEBUG
CMDCache::Shutdown();
CMemoryPoolManager::GetMemoryPoolMgr()->Destroy(mp);
CXformFactory::Shutdown();
#endif / GPOS_DEBUG
}
/ EOF