how allocated releasing Boolean operators, short-circuitcallback routinesand code segmentationcode segmentingand dangling pointerseffect on callback routines compaction. See heap compactioncopying memory blocksCurrentA5 global variabledefined
getting value cushions. See memory cushionsdangling pointersavoiding causes ofdangling procedure pointersdefined detecting
introducedlocking blocks to prevent referencing callback routines using local variables to preventdereferenced handles'dialog boxes, and low-memory situationsdisposed handles checking fordefinedpreventing dereferencing ofproblems usingDisposeHandle procedureDisposePtr proceduredouble indirection
empty handles checking fordefinedEmptyHandle procedure used by a grow-zone function fake handlescreatingdefinedproblems using%fragmentation. See heap fragmentationgaps in heaps, danger ofGetApplLimit functiongglobal variables. See application global variables; system global variables; QuickDraw global variablesgrow-zone functionsdefined
example offinding protected blocksettingusing SetA5 functionusing SetCurrentA5 functionGZRootHnd global variableGZSaveHnd functionHandle data typehandleschecking validity ofdefinedheap compactiondefined%movement of relocatable blocks duringheap fragmentation causes ofdefinedduring memory reservation maximizing heap size to prevent
preventingsummary of prevention heap purging'heap. See application heap; system heapHGetState functionHLock procedureHLockHi procedureHNoPurge procedureHPurge procedureHSetState procedureHUnlock procedureInitZone procedureinterrupt tasksand Memory Manager routinesinterrupt time#avoiding Memory Manager routines at
jump tablejump table entriesfor callback routines(linked lists, allocating new elements in,loading code segments, and dangling pointerslocking relocatable blockslow-memory conditionsmaster pointer blocksmaster pointersallocating manuallydefined#determining how many to preallocate$number per block in application zonerunning out ofMaxApplZone procedure and ApplLimit global variableand heap fragmentationautomatic execution ofMemErr global variableMemError functionmemoryallocating and releasingorganization ofmemory cushionsdefineddetermining optimal size of maintainingMemory Manager24-bit32-bitallocating master pointersand application heapcalling grow-zone functioncompacting heap
data typesmovement of blocks by purging heapreserving memoryreturning result codes(memory reservation. See reserving memorymemory reserves benefits ofdefined maintainingMoreMasters procedureMoveHHi procedure moving relocatable blocks highNewHandle functionNewHandleClear functionNewPtr functionNewPtrClear function9nonessential memory requests, checking whether to satisfynonrelocatable blocks
advantages of
allocatingallocating temporarily
data type fordefined disposal and reallocation of releasingwhen to allocate
partitions2.See also application partitions; system partitionpointersProcPtr data typeand code segmentationprotected blocksdefineddetermining which they are handle to returned by GZSaveHnd
Ptr data typePurgeSpace procedurepurging heap zonespurging relocatable blocksQuickDraw global variablesdefinedReallocateHandle procedure reallocating relocatable blocksrelocatable blocks
allocatingchanging properties
data type fordefineddisadvantages ofemptyinggetting propertiesin bottom of heap zonelockingfor long periods of timefor short periods of timemaking purgeablemaking unpurgeablemanaging master pointers after disposingmaster pointers for#moving around nonrelocatable blocks moving high
properties ofpurging reallocating releasing restrictions on locked blockssetting propertiessizingmovement during unlocking when to lockReserveMem procedure reserves. See memory reservesreserving memoryand heap fragmentationdefinedfor relocatable blocks
limitation ofresource types'SIZE'(result codes for Memory Manager routinesSetA5 function used in a grow-zone functionSetApplLimit procedure using to increase size of stackSetCurrentA5 function used in a grow-zone functionSetGrowZone procedure short-circuit Boolean operatorsSignedByte data typestackcollisions with the heapdefault size ofdefinedincreasing size of stack frame
stack sniffersystem global variablesdefined system heapdefinedsystem partition..See also system heap; system global variablestemporary memorydefinedthirty-two bit addressingdefined]thirty-two bit clean]twenty-four bit addressingdefined] unlocking relocatable blocks)updating windows, saving memory space forvirtual memory
introduced.WITH statement (Pascal), and dangling pointerszero (memory location)See 0 (memory location)zero-length handlesSee 0-length handles'sysz' resource type
@ operator_OSDispatch trap macro.See also heap zonesdefinedgetting a pointer to initializing$subdividing into multiple heap zonesApplicationZone functionApplZone global variableblock contents
block headers3.See also nonrelocatable blocks; relocatable blocks
concatenating manipulatingsize correction forBufPtr global variable%limitation on lowering during startupByte data type(code resources, copying into system heapcompacting heap zonesCompactMem functionCompactMemSys functionconcatenating memory blockscurrent heap zone CurStackBase global variableDeskHook global variable*and displaying windows during startup timeclearing in PascalDetachResource procedure duplicating relocatable blocks-Finder, allocation of memory for disk copying
free space assessing+assessing availability for temporary memoryFreeMem functionFreeMemSys functionGetHandleSize function+GetNextEvent function, and temporary memoryGetPtrSize functionGetZone functionHandAndHand function .See also relocatable blocks
recoveringrelativeHandleZone functionHandToHand functionHClrRBit procedure routines for routines for
heap zones%.See also zone headers; zone trailers accessingchangingdefinedgetting current zone initializing manipulatingorganization of$subdividing into multiple heap zonesHeapEnd global variable'high memory, allocating at startup timeHSetRBit procedureInitApplZone procedure3initializing new heap zones within other heap zones*interprocess buffers, and temporary memoryand temporary memorylogical sizes of blockslow-memory global variablesSee system global variablesMaxBlock functionMaxBlockSys functionmaximizing heap zone spaceMaxMem functionMaxMemSys functionmaxSize constantMC680x0 microprocessorsize of memory blocks with*.See also temporary memory; virtual memoryallocating during startup assessingchanging sizes of blocksfreeing!memory blocks. See blocks, memory application-defined routinescapabilities ofdefinedroutinestesting for featuresMemTop global variablemultiple heap zones implementinguses forNewEmptyHandle functionNewEmptyHandleSys functionNewHandleSys functionNewHandleSysClear functionNewPtrSys functionNewPtrSysClear function.See also blocks, memorysizing=operating system queues, storing elements in system heap zone original application heap zonephysical sizes of blocks2.See also nonrelocatable blocks; dangling pointers"referencing code in code resourcesPtrAndHand functionPtrToHand functionPtrToXHand functionPtrZone functionpurge-warning proceduresdefinedinstalled by SetResPurgerestrictions onsampleusing SetA5 functionusing SetCurrentA5 functionPurgeMem procedurePurgeMemSys procedureRecoverHandle functionrelative handles!.See also blocks, memory; handlesclearing resource bit
concatenating duplicatingsetting propertiessetting resource bitsizing unlockingReserveMemSys procedureroutines resource bitclearingsetting5Resource Manager, installing purge-warning procedures'sysz'!used in a purge-warning procedureSetApplBase procedure!used in a purge-warning procedureSetHandleSize procedureSetPtrSize procedure:SetResPurge procedure, installing purge-warning proceduresSetZone proceduresize correction for blocksSize data typedetermining available spaceStackSpace functionstartup processallocating memory duringdisplaying windows duringStr255 data typeStringHandle data typeStringPtr data typeSysEqu.p interface file4system extensions, allocating memory at startup timechangingreadinguses ofsystem heap zoneallocating memory in creating new heap zones withindefinedgetting a pointer to installing interrupt code intouses forSystemZone functionSysZone global variable tag bytesTempFreeMem functionTempMaxMem functionTempNewHandle function
allocating confirming success of allocationdetermining zone oflimitation on lockingoperating on blocksoptimal usage of)release of during application terminationroutinestesting for features of tracking ofusing as a heap zoneTheZone global variable
THz data typeTopMem function,WaitNextEvent function, and temporary memoryZone data structure zone headers
zone pointers zone recordszone trailer blocks
zone trailers_DebugUtil trap_MemoryDispatch trap macro"_MemoryDispatchA0Result trap macro Address Management Unit (AMU)@address space. See logical address space; physical address space AMU (Address Management Unit) AppleShare, and paging devices!backing volume. See paging devicebacking-store filesdefinedbus-error vectorscompletion routines deferred under virtual memoryconcurrent driverscontrol panels, Memory.See Memory control panel
data cacheand virtual memoryDebuggerEnter procedureDebuggerExit procedureDebuggerGetMax functionDebuggerLockMemory functionDebuggerPoll procedure debuggers, and virtual memory DebuggerUnlockMemory functionDeferUserFn function
introducedusing$device drivers, avoiding page faultsdirect memory access (DMA) DMA. See direct memory accessdouble page faultsGetPageState functionGetPhysical function(and discontiguous physical address space
introducedusingholding physical memoryHoldMemory function deferring under virtual memory-deferring code execution under virtual memoryinterrupts, nonmaskable!ISP. See stack pointer, interruptlocking physical memorydebugger routinedefined routines forLockMemory function
introduced LockMemoryContiguous functionlogical address spacepossible fragmentation of size of with 24-bit addressing size of with 32-bit addressing%translating to physical address space<logical-to-physical translation table. See translation table%LogicalToPhysicalTable data structureholding releasingmemory addressesmapping logical to physical1memory configuration, obtaining information aboutMemory control panel memory management unit (MMU)memory-block recordMemoryBlock data structure MMU (memory management unit)nonmaskable interrupts page faults .See also double page faultsdefinedhandling%intercepted by Virtual Memory Managerprotection against#Paged Memory Management Unit (PMMU)PageFaultFatal function
pages, memorydefinedholdinglockinglocking contiguously releasing unlockingPageState data typepaging
paging devicephysical address space
discontiguousphysical memoryholding pages inlocking pages inreleasing pagesunlocking pages#PMMU (Paged Memory Management Unit)releasing held pages#removable disks, and virtual memory3slot-based VBL tasks, deferred under virtual memory
stack pointerinterrupt (ISP)
user (USP)supervisor mode held in RAM under virtual memorythirty-two bit addressing]Time Manager tasks deferred under virtual memory)translating logical to physical addressestranslation tablestwenty-four bit addressing]UnholdMemory functionunlocking physical memorydebugger routineUnlockMemory function USP. See stack pointer, user VBL tasks deferred under virtual memoryVector Base Register (VBR)and AppleShare volumesand removable disksand user interruptsbus-error vectors underCPU data cachingdebugger routinesdebugger support for"deferring interrupt code executionmanagement routines mapping information, gettingrequirements for runningtesting for availabilityVirtual Memory Manager.See also virtual memorydata structuresdefinedroutines%setting with the Memory control panelstripping flag bitsmachines that support%setting with the Memory control panelusing temporarily+_BlockMove trap, flushing instruction cache_HWPriv trap macro)_LoadSeg trap, flushing instruction cache&_Read trap, flushing instruction cache+_UnloadSeg trap, flushing instruction cache/use of by Toolbox and Operating System routines!using to access QuickDraw globals accessing in completion routines accessing in interrupt tasksaddress-translation modegettingsettingtemporarily changing addresses. See memory addressesaddressing modes24-bit32-bitcurrent mode, getting switching accessing in completion routines accessing in interrupt tasks(volume specified in Memory control panel5caches. See data cache; disk cache; instruction cache maintaining the A5 register in(click-loop routines, and the A5 register maintaining the A5 register in.control action procedures, and the A5 register2control definition procedures, and the A5 registercopy-back cacheand callback routinesdefinedflushing#deferred tasks, and the A5 registerand stale data
disk cachedefined%setting with the Memory control panel flag bitsmaster pointer strippingFlushCodeCache procedure FlushCodeCacheRange functionFlushDataCache procedureflushing
data cacheinstruction cache FlushInstructionCache procedureGetMMUMode functionand the A5 registerHFS RAM Cache panel,I/O completion routines, and the A5 registerinstruction cachedefinedflushingmaintaining the A5 registerand stale instructionsand stale datamaster pointer flag bits comparing
data cacheinstruction cache comparingconverting to 32-bit modestripping flag bits from translatingaddressing mode controlsdisk cache controls illustrated
introducedRAM disk controlsvirtual memory controls/menu definition procedures, and the A5 register&Notification Manager, and the A5 world5notification response procedures, and the A5 register7OpenResFile function, calling StripAddress on filenames6OpenRFPerm function, calling StripAddress on filenamesordered address comparisons patches, and stale instructions&Process Manager, and callback routinesprocessor caches'.See also data cache; instruction cache7program counter, fixing before switching to 32-bit modereading in stand-alone code structure ofusing in stand-alone codeRAM cache. See disk cache RAM disksdefined)setting size of with Memory control panelreference constant fieldsusing to store A5 value+self-modifying code, and stale instructions
stale dataavoiding problems withdefinedstale instructionsavoiding problems withdefined@stand-alone code resources, changing address-translation mode inStripAddress functionSwapDataCache function SwapInstructionCache functionSwapMMUMode procedure calling from stand-alone codemachines that support]&setting with the Memory control panel]using temporarily]and the A5 registerTranslate24To32 function!trap patches, and the A5 register&setting with the Memory control panel]stripping flag bits]and the A5 registerbacking-store file%setting with the Memory control panel1window definition procedures, and the A5 register(word-break routines, and the A5 registerwrite-through cache
