greenplumn IMemoryVisitor 源码
greenplumn IMemoryVisitor 代码
文件路径：/src/backend/gporca/libgpos/include/gpos/memory/IMemoryVisitor.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2008-2010 Greenplum Inc.
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// IMemoryVisitor.h
//
// @doc:
// Interface for applying a common operation to all allocated objects
// inside a memory pool.
//
// @owner:
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPOS_IMemoryVisitor_H
#define GPOS_IMemoryVisitor_H
#include "gpos/assert.h"
#include "gpos/types.h"
namespace gpos
{
// prototypes
class CStackDescriptor;
// wrapper for common operation on allocated memory;
// called by memory pools when a walk of the memory is requested;
class IMemoryVisitor
{
private:
public:
IMemoryVisitor(IMemoryVisitor &) = delete;
// ctor
IMemoryVisitor() = default;
// dtor
virtual ~IMemoryVisitor() = default;
// executed operation during a walk of objects;
// file name may be NULL (when debugging is not enabled);
// line number will be zero in that case;
// sequence number is a constant in case allocation sequencing is not supported;
virtual void Visit(void *user_addr, SIZE_T user_size, void *total_addr,
SIZE_T total_size, const CHAR *alloc_filename,
const ULONG alloc_line, ULLONG alloc_seq_number,
CStackDescriptor *desc) = 0;
};
} // namespace gpos
#endif // GPOS_IMemoryVisitor_H
// EOF
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