THashCacheTimer

Return to Unit Filesystem

Description

---

To be documented

Class definitions

---

THashCacheTimer = class(TObject)

constructor Create(ACache:THashCache);
destructor Destroy; override;
protected
FCache:THashCache;
FLock:TMutexHandle;
FInterval:LongWord;
FCheckTimer:TTimerHandle;
FProcessSemaphore:TSemaphoreHandle;
FFirst:PCacheTimerItem;
FLast:PCacheTimerItem;
function AcquireLock:Boolean;
function ReleaseLock:Boolean;
function Dequeue(AMax:Integer):TCachePage;
function FirstKey:Integer;
function InsertKey(APage:TCachePage; AKey:Integer):Boolean;
function DeleteKey(APage:TCachePage):Boolean;
function DecrementKey:Integer;
public
function StartTimer(AInterval:LongWord):Boolean;
function StopTimer:Boolean;
function CheckTimer:Boolean;
function ProcessTimer:Boolean;
function SchedulePage(APage:TCachePage; ATimeout:LongWord):Boolean;
function UnschedulePage(APage:TCachePage):Boolean;

Function declarations

---

constructor THashCacheTimer.Create(ACache:THashCache);

Description: To be documented

Note	None documented

destructor THashCacheTimer.Destroy;

Description: To be documented

Note	None documented

function THashCacheTimer.AcquireLock:Boolean;

Description: To be documented

Note	None documented

function THashCacheTimer.ReleaseLock:Boolean;

Description: To be documented

Note	None documented

function THashCacheTimer.Dequeue(AMax:Integer):TCachePage;

Description: Get and remove the first page from the timer list if the key is less than or equal to Max

Max	The maximum value of the key for the page to be dequeued
Return	Dequeued Page or nil on non ready or failure

function THashCacheTimer.FirstKey:Integer;

Description: Get the first Key value from the timer list

Return	First Key value from timer list or CACHE_TIMER_KEY_NONE on failure

function THashCacheTimer.InsertKey(APage:TCachePage; AKey:Integer):Boolean;

Description: Insert the supplied page in the timer list in delta ascending order based on Key

Page	The page to be inserted
Key	The key to order the insertion on
Return	True if completed or False on failure

function THashCacheTimer.DeleteKey(APage:TCachePage):Boolean;

Description: Delete the supplied page from the timer list

Page	The page to be deleted
Return	True if completed or False on failure

function THashCacheTimer.DecrementKey:Integer;

Description: Decrement the first Key value in the Timer list

Return	First Key value in timer list after decrement or CACHE_TIMER_KEY_NONE on failure

function THashCacheTimer.StartTimer(AInterval:LongWord):Boolean;

Description: To be documented

Note	None documented

function THashCacheTimer.StopTimer:Boolean;

Description: To be documented

Note	None documented

function THashCacheTimer.CheckTimer:Boolean;

Description: To be documented

Note	None documented

function THashCacheTimer.ProcessTimer:Boolean;

Description: To be documented

Note	None documented

function THashCacheTimer.SchedulePage(APage:TCachePage; ATimeout:LongWord):Boolean;

Description: To be documented

Note	None documented

function THashCacheTimer.UnschedulePage(APage:TCachePage):Boolean;

Description: To be documented

Note	None documented

Return to Unit Reference