greenplumn CMemoryPoolStatistics 源码
greenplumn CMemoryPoolStatistics 代码
文件路径：/src/backend/gporca/libgpos/include/gpos/memory/CMemoryPoolStatistics.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2009-2010 Greenplum Inc.
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// CMemoryPoolStatistics.h
//
// @doc:
// Statistics for memory pool.
//
// @owner:
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPOS_CMemoryPoolStatistics_H
#define GPOS_CMemoryPoolStatistics_H
#include "gpos/types.h"
namespace gpos
{
// Statistics for a memory pool
class CMemoryPoolStatistics
{
private:
ULLONG m_num_successful_allocations{0};
ULLONG m_num_failed_allocations{0};
ULLONG m_num_free{0};
ULLONG m_num_live_obj{0};
ULLONG m_live_obj_user_size{0};
ULLONG m_live_obj_total_size{0};
public:
CMemoryPoolStatistics(CMemoryPoolStatistics &) = delete;
// ctor
CMemoryPoolStatistics() = default;
// dtor
virtual ~CMemoryPoolStatistics() = default;
// get the total number of successful allocation calls
ULLONG
GetNumSuccessfulAllocations() const
{
return m_num_successful_allocations;
}
// get the total number of failed allocation calls
ULLONG
GetNumFailedAllocations() const
{
return m_num_failed_allocations;
}
// get the total number of free calls
ULLONG
GetNumFree() const
{
return m_num_free;
}
// get the number of live objects
ULLONG
GetNumLiveObj() const
{
return m_num_live_obj;
}
// get the user data size of live objects
ULLONG
LiveObjUserSize() const
{
return m_live_obj_user_size;
}
// get the total data size (user + header padding) of live objects;
// not accounting for memory used by the underlying allocator for its header;
ULLONG
LiveObjTotalSize() const
{
return m_live_obj_total_size;
}
// record a successful allocation
void
RecordAllocation(ULONG user_data_size, ULONG total_data_size)
{
++m_num_successful_allocations;
++m_num_live_obj;
m_live_obj_user_size += user_data_size;
m_live_obj_total_size += total_data_size;
}
// record a successful free call (of a valid, non-NULL pointer)
void
RecordFree(ULONG user_data_size, ULONG total_data_size)
{
++m_num_free;
--m_num_live_obj;
m_live_obj_user_size -= user_data_size;
m_live_obj_total_size -= total_data_size;
}
// record a failed allocation attempt
void
RecordFailedAllocation()
{
++m_num_failed_allocations;
}
// return total allocated size
virtual ULLONG
TotalAllocatedSize() const
{
return m_live_obj_total_size;
}
}; // class CMemoryPoolStatistics
} // namespace gpos
#endif // ! CMemoryPoolStatistics
// EOF
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