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MySQL 5.1: Chunk256 Struct Reference

Chunk256 Struct Reference

#include <buddy.hpp>


Public Member Functions
void	setFree (bool free)
bool	getFree ()
void	setAllocationTimeStamp (Uint32 cTime)
Uint32	getAllocationTimeStamp ()
Public Attributes
Uint32	allocationTimeStamp
Uint32	nextSegmentOfSameSize
Uint32	prevSegmentOfSameSize

Detailed Description

Definition at line 108 of file buddy.hpp.

Member Function Documentation

Uint32 Chunk256::getAllocationTimeStamp ( )

Definition at line 42 of file buddy.cpp.

References allocationTimeStamp.

00042                                        {
00043   Uint32 onMask = 0x80000000;
00044   allocationTimeStamp = allocationTimeStamp ^ onMask;
00045   printf("\nGet allocation time. Time is %d", allocationTimeStamp);
00046   return allocationTimeStamp;
00047 };

bool Chunk256::getFree ( )

Definition at line 28 of file buddy.cpp.

References allocationTimeStamp.

00028                       {
00029   Uint32 offMask = 0x0; 
00030   return ((allocationTimeStamp | offMask) == offMask ? true : false);
00031 }

void Chunk256::setAllocationTimeStamp ( Uint32 cTime )

Definition at line 33 of file buddy.cpp.

References allocationTimeStamp.

Referenced by BuddyMemory::getSegment().

00033                                                  {
00034   // Bits 1-31 of allocationTimeStamp represent the allocation time for segment
00035   
00036   // printf("\nSet allocation time. Current time %d", cTime);
00037   Uint32 onMask = 0x80000000; // A mask to set the 0 bit to 1
00038   allocationTimeStamp = 0x0;
00039   allocationTimeStamp = onMask | cTime;
00040 }

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void Chunk256::setFree ( bool free )

Definition at line 19 of file buddy.cpp.

References allocationTimeStamp.

00019                                {
00020   // Bit 0 of allocationTimeStamp represents if the segment is free or not
00021   Uint32 offMask = 0x0; // A mask to set the 0 bit to 0
00022   allocationTimeStamp = 0x0;
00023   if(free) 
00024     // Set this bit to 0, if segment should be free
00025     allocationTimeStamp = allocationTimeStamp & offMask;
00026 }