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Quick.Threads.pas
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Quick.Threads.pas
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{ ***************************************************************************
Copyright (c) 2016-2019 Kike Pérez
Unit : Quick.Threads
Description : Thread safe collections
Author : Kike Pérez
Version : 1.4
Created : 09/03/2018
Modified : 24/01/2019
This file is part of QuickLib: https://github.com/exilon/QuickLib
***************************************************************************
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*************************************************************************** }
unit Quick.Threads;
{$i QuickLib.inc}
interface
uses
Classes,
//rtti,
Types,
SysUtils,
DateUtils,
Quick.Commons,
//Quick.Chrono,
Quick.Value,
{$IFNDEF FPC}
System.RTLConsts,
System.Generics.Collections,
System.SyncObjs;
{$ELSE}
RtlConsts,
Generics.Collections,
syncobjs;
{$ENDIF}
type
TThreadedQueueCS<T> = class
private
FQueue: array of T;
FQueueSize, FQueueOffset: Integer;
FQueueLock: TCriticalSection;
{$IFDEF FPC}
FQueueCondVar : TEventObject;
{$ELSE}
FQueueCondVar: TConditionVariableCS;
{$ENDIF}
FShutDown: Boolean;
FPushTimeout, FPopTimeout: Cardinal;
FTotalItemsPushed, FTotalItemsPopped: Cardinal;
public
constructor Create(AQueueDepth: Integer = 10; PushTimeout: Cardinal = INFINITE; PopTimeout: Cardinal = INFINITE);
destructor Destroy; override;
procedure Grow(ADelta: Integer);
function PushItem(const AItem: T): TWaitResult; overload;
function PushItem(const AItem: T; var AQueueSize: Integer): TWaitResult; overload;
function PopItem: T; overload;
function PopItem(var AQueueSize: Integer): T; overload;
function PopItem(var AQueueSize: Integer; var AItem: T): TWaitResult; overload;
function PopItem(var AItem: T): TWaitResult; overload;
procedure DoShutDown;
procedure Clear;
property QueueSize: Integer read FQueueSize;
property ShutDown: Boolean read FShutDown;
property TotalItemsPushed: Cardinal read FTotalItemsPushed;
property TotalItemsPopped: Cardinal read FTotalItemsPopped;
end;
TThreadedQueueList<T> = class
private
fQueue : TQueue<T>;
fQueueSize : Integer;
fQueueLock : TCriticalSection;
{$IFDEF FPC}
FQueueCondVar : TSimpleEvent;
{$ELSE}
FQueueCondVar: TConditionVariableCS;
{$ENDIF}
fShutDown : Boolean;
fPushTimeout : Cardinal;
fPopTimeout : Cardinal;
fTotalItemsPushed : Cardinal;
fTotalItemsPopped : Cardinal;
public
constructor Create(AQueueDepth: Integer = 10; PushTimeout: Cardinal = INFINITE; PopTimeout: Cardinal = INFINITE);
destructor Destroy; override;
procedure Grow(ADelta: Integer);
function PushItem(const AItem: T): TWaitResult; overload;
function PushItem(const AItem: T; var AQueueSize: Integer): TWaitResult; overload;
function PopItem: T; overload;
function PopItem(var AQueueSize: Integer): T; overload;
function PopItem(var AQueueSize: Integer; var AItem: T): TWaitResult; overload;
function PopItem(var AItem: T): TWaitResult; overload;
procedure DoShutDown;
property QueueSize: Integer read FQueueSize;
property ShutDown: Boolean read FShutDown;
property TotalItemsPushed: Cardinal read FTotalItemsPushed;
property TotalItemsPopped: Cardinal read FTotalItemsPopped;
end;
{$IFNDEF FPC}
TThreadObjectList<T: class> = class(TList<T>)
private
fList: TObjectList<T>;
fLock: TObject;
fDuplicates: TDuplicates;
function GetItem(aIndex : Integer) : T;
procedure SetItem(aIndex : Integer; aValue : T);
public
constructor Create(OwnedObjects : Boolean);
destructor Destroy; override;
property Items[Index : Integer] : T read GetItem write SetItem ; default;
procedure Add(const Item: T);
procedure Clear;
function LockList: TObjectList<T>;
procedure Remove(const Item: T); inline;
procedure RemoveItem(const Item: T; Direction: TDirection);
procedure UnlockList; inline;
property Duplicates: TDuplicates read fDuplicates write fDuplicates;
end;
{$ENDIF}
{$IFDEF FPC}
TProc = procedure of object;
{$ENDIF}
TAdvThread = class(TThread)
private
fExecuteProc : TProc;
fTerminateProc : TProc;
fExecuteWithSync : Boolean;
fTerminateWithSync : Boolean;
procedure DoExecute;
procedure CallToTerminate;
protected
procedure DoTerminate; override;
public
constructor Create(aProc : TProc; aSynchronize : Boolean);
procedure OnTerminate(aProc : TProc; aSynchronize : Boolean);
procedure Execute; override;
end;
IAnonymousThread = interface
procedure Start;
function OnTerminate(aProc : TProc) : IAnonymousThread;
function OnTerminate_Sync(aProc : TProc) : IAnonymousThread;
end;
TAnonymousThread = class(TInterfacedObject,IAnonymousThread)
private
fThread : TAdvThread;
constructor Create(aProc : TProc; aSynchronize : Boolean);
public
class function Execute(aProc : TProc) : IAnonymousThread; overload;
class function Execute_Sync(aProc : TProc) : IAnonymousThread; overload;
procedure Start;
function OnTerminate(aProc : TProc) : IAnonymousThread; overload;
function OnTerminate_Sync(aProc : TProc) : IAnonymousThread; overload;
end;
TParamArray = array of TFlexValue;
TWorkTaskStatus = (wtsPending, wtsAssigned, wtsRunning, wtsDone, wtsException);
TScheduleMode = (smRunOnce, smRepeatMode);
TTimeMeasure = (tmDays, tmHours, tmMinutes, tmSeconds);
ITask = interface
['{0182FD36-5A7C-4C00-BBF8-7CFB1E3F9BB1}']
function GetParam(aIndex : Integer) : TFlexValue;
function TaskStatus : TWorkTaskStatus;
function GetNumWorker : Integer;
procedure SetNumWorker(Value : Integer);
function GetIdTask : Int64;
procedure SetIdTask(Value : Int64);
procedure DoExecute;
procedure DoException(aException : Exception);
procedure DoTerminate;
property Param[index : Integer] : TFlexValue read GetParam;
property NumWorker : Integer read GetNumWorker write SetNumWorker;
property IdTask : Int64 read GetIdTask;
function IsEnabled : Boolean;
end;
{$IFNDEF FPC}
TTaskProc = reference to procedure(task : ITask);
TTaskExceptionProc = reference to procedure(task : ITask; aException : Exception);
{$ELSE}
TTaskProc = procedure(task : ITask) of object;
TTaskExceptionProc = procedure(task : ITask; aException : Exception) of object;
{$ENDIF}
IWorkTask = interface(ITask)
function OnException(aTaskProc : TTaskExceptionProc) : IWorkTask;
function OnTerminated(aTaskProc : TTaskProc) : IWorkTask;
procedure Run;
end;
IScheduledTask = interface(ITask)
['{AE551638-ECDE-4F64-89BF-F07BFCB9C9F7}']
function OnException(aTaskProc : TTaskExceptionProc) : IScheduledTask;
function OnException_Sync(aTaskProc : TTaskExceptionProc) : IScheduledTask;
function OnTerminated(aTaskProc : TTaskProc) : IScheduledTask;
function OnTerminated_Sync(aTaskProc : TTaskProc) : IScheduledTask;
function OnExpired(aTaskProc : TTaskProc) : IScheduledTask;
function OnExpired_Sync(aTaskProc : TTaskProc) : IScheduledTask;
function CheckSchedule : Boolean;
procedure DoExpire;
function GetTaskName : string;
function StartAt(aStartDate : TDateTime) : IScheduledTask;
function StartTodayAt(aHour, aMinute: Word; aSecond : Word = 0): IScheduledTask;
function StartTomorrowAt(aHour, aMinute: Word; aSecond : Word = 0): IScheduledTask;
function StartOnDayChange : IScheduledTask;
function StartNow : IScheduledTask;
function StartInMinutes(aMinutes : Word) : IScheduledTask;
function StartInSeconds(aSeconds : Word) : IScheduledTask;
procedure RunOnce;
procedure RepeatEvery(aInterval : Integer; aTimeMeasure : TTimeMeasure); overload;
procedure RepeatEvery(aInterval : Integer; aTimeMeasure : TTimeMeasure; aEndTime : TDateTime); overload;
procedure RepeatEvery(aInterval : Integer; aTimeMeasure : TTimeMeasure; aRepeatTimes : Integer); overload;
procedure RepeatEveryDay;
procedure RepeatEveryWeek;
function IsFinished : Boolean;
procedure Cancel;
property Name : string read GetTaskName;
end;
TTask = class(TInterfacedObject,ITask)
private
fIdTask : Int64;
fNumWorker : Integer;
fParamArray : TParamArray;
fExecuteProc : TTaskProc;
fExceptProc : TTaskExceptionProc;
fTerminateProc : TTaskProc;
fExpiredProc : TTaskProc;
fTaskStatus : TWorkTaskStatus;
fOwnedParams : Boolean;
fEnabled : Boolean;
fExecuteWithSync : Boolean;
fExceptionWithSync : Boolean;
fTerminateWithSync : Boolean;
function GetParam(aIndex : Integer) : TFlexValue;
procedure DoExecute;
procedure DoException(aException : Exception);
procedure DoTerminate;
function GetNumWorker : Integer;
procedure SetNumWorker(Value : Integer);
function GetIdTask : Int64;
procedure SetIdTask(Value : Int64);
protected
property ExecuteWithSync : Boolean read fExecuteWithSync write fExecuteWithSync;
property TerminateWithSync : Boolean read fTerminateWithSync write fTerminateWithSync;
property ExceptionWithSync : Boolean read fExceptionWithSync write fExceptionWithSync;
public
constructor Create(aParamArray : array of const; aOwnedParams : Boolean; aTaskProc : TTaskProc); virtual;
destructor Destroy; override;
property IdTask : Int64 read GetIdTask;
property OwnedParams : Boolean read fOwnedParams write fOwnedParams;
function IsEnabled : Boolean;
function TaskStatus : TWorkTaskStatus;
end;
TWorkTask = class(TTask,IWorkTask)
public
function OnException(aTaskProc : TTaskExceptionProc) : IWorkTask; virtual;
function OnTerminated(aTaskProc : TTaskProc) : IWorkTask; virtual;
procedure Run; virtual;
end;
TTaskQueue = TThreadedQueueCS<IWorkTask>;
TScheduledTask = class(TTask,IScheduledTask)
private
fName : string;
fExecutionTimes : Integer;
fScheduleMode : TScheduleMode;
fTimeInterval : Integer;
fTimeMeasure : TTimeMeasure;
fStartDate : TDateTime;
fLastExecution : TDateTime;
fNextExecution : TDateTime;
fExpirationDate : TDateTime;
fExpirationTimes : Integer;
fFinished : Boolean;
fExpireWithSync: Boolean;
procedure ClearSchedule;
function CheckSchedule : Boolean;
procedure DoExpire;
function GetTaskName : string;
protected
property ExpireWithSync : Boolean read fExpireWithSync write fExpireWithSync;
public
property Name : string read fName write fName;
function OnException(aTaskProc : TTaskExceptionProc) : IScheduledTask; virtual;
function OnException_Sync(aTaskProc : TTaskExceptionProc) : IScheduledTask; virtual;
function OnTerminated(aTaskProc : TTaskProc) : IScheduledTask; virtual;
function OnTerminated_Sync(aTaskProc : TTaskProc) : IScheduledTask; virtual;
function OnExpired(aTaskProc : TTaskProc) : IScheduledTask; virtual;
function OnExpired_Sync(aTaskProc : TTaskProc) : IScheduledTask; virtual;
function StartAt(aStartDate : TDateTime) : IScheduledTask;
function StartTodayAt(aHour, aMinute: Word; aSecond : Word = 0): IScheduledTask;
function StartTomorrowAt(aHour, aMinute: Word; aSecond : Word = 0): IScheduledTask;
function StartOnDayChange : IScheduledTask;
function StartNow : IScheduledTask;
function StartInMinutes(aMinutes : Word) : IScheduledTask;
function StartInSeconds(aSeconds : Word) : IScheduledTask;
procedure RunOnce;
procedure RepeatEvery(aInterval : Integer; aTimeMeasure : TTimeMeasure); overload;
procedure RepeatEvery(aInterval : Integer; aTimeMeasure : TTimeMeasure; aEndTime : TDateTime); overload;
procedure RepeatEvery(aInterval : Integer; aTimeMeasure : TTimeMeasure; aRepeatTimes : Integer); overload;
procedure RepeatEveryDay;
procedure RepeatEveryWeek;
function IsFinished : Boolean;
procedure Cancel;
end;
TWorkerStatus = (wsIdle, wsWorking, wsSuspended);
TWorker = class(TThread)
private
fNumWorker : Integer;
fCurrentIdTask : Integer;
fStatus : TWorkerStatus;
fTaskQueue : TTaskQueue;
procedure ExecuteTask;
procedure TerminateTask;
protected
fCurrentTask : ITask;
public
constructor Create(aNumWorker : Integer; aTaskQueue : TTaskQueue);
property NumWorker : Integer read fNumWorker;
property Status : TWorkerStatus read fStatus;
procedure Execute; override;
end;
TScheduledWorker = class(TWorker)
private
procedure ExpireTask;
public
constructor Create(aNumWorker : Integer; aScheduledTask: IScheduledTask);
procedure Execute; override;
end;
TWorkerPool = TObjectList<TWorker>;
TBackgroundTasks = class
private
fMaxQueue : Integer;
fWorkerPool : TWorkerPool;
fConcurrentWorkers : Integer;
fInsertTimeout : Cardinal;
fExtractTimeout : Cardinal;
fTaskQueue : TTaskQueue;
fNumPushedTasks : Int64;
function GetTaskQueue : Cardinal;
public
constructor Create(aConcurrentWorkers : Integer; aMaxQueue : Integer = 100);
destructor Destroy; override;
property MaxQueue : Integer read fMaxQueue;
property InsertTimeout : Cardinal read fInsertTimeout write fInsertTimeout;
property ExtractTimeout : Cardinal read fExtractTimeout write fExtractTimeout;
property TaskQueued : Cardinal read GetTaskQueue;
property NumPushedTasks : Int64 read fNumPushedTasks;
property ConcurrentWorkers : Integer read fConcurrentWorkers write fConcurrentWorkers;
function AddTask(aTaskProc : TTaskProc) : IWorkTask; overload;
function AddTask_Sync(aTaskProc : TTaskProc) : IWorkTask; overload;
function AddTask(aParamArray : array of const; aOwnedParams : Boolean; aTaskProc : TTaskProc) : IWorkTask; overload;
function AddTask_Sync(aParamArray : array of const; aOwnedParams : Boolean; aTaskProc : TTaskProc) : IWorkTask; overload;
procedure Start;
procedure CancelAll;
end;
TScheduledTaskList = TList<IScheduledTask>;
TScheduler = class(TThread)
private
fListLock : TCriticalSection;
fCondVar : TSimpleEvent;
fTaskList : TScheduledTaskList;
fRemoveTaskAfterExpiration : Boolean;
procedure ExpireTask;
public
constructor Create(aTaskList : TScheduledTaskList);
destructor Destroy; override;
property RemoveTaskAfterExpiration : Boolean read fRemoveTaskAfterExpiration write fRemoveTaskAfterExpiration;
procedure Execute; override;
function Add(aTask : TScheduledTask) : Integer;
function Get(aIdTask : Int64) : IScheduledTask; overload;
function Get(const aTaskName : string) : IScheduledTask; overload;
end;
TScheduledTasks = class
private
fTaskList : TScheduledTaskList;
fScheduler : TScheduler;
fNumPushedTasks : Int64;
fRemoveTaskAfterExpiration : Boolean;
fIsStarted : Boolean;
public
constructor Create;
destructor Destroy; override;
property NumPushedTasks : Int64 read fNumPushedTasks;
property RemoveTaskAfterExpiration : Boolean read fRemoveTaskAfterExpiration write fRemoveTaskAfterExpiration;
property IsStarted : Boolean read fIsStarted;
function AddTask(const aTaskName : string; aTaskProc : TTaskProc) : IScheduledTask; overload;
function AddTask_Sync(const aTaskName : string; aTaskProc : TTaskProc) : IScheduledTask; overload;
function AddTask(const aTaskName : string; aParamArray : array of const; aOwnedParams : Boolean; aTaskProc : TTaskProc) : IScheduledTask; overload;
function AddTask_Sync(const aTaskName : string; aParamArray : array of const; aOwnedParams : Boolean; aTaskProc : TTaskProc) : IScheduledTask; overload;
function GetTask(aIdTask : Int64) : IScheduledTask; overload;
function GetTask(const aTaskName : string) : IScheduledTask; overload;
procedure Start;
procedure Stop;
end;
implementation
{ TThreadedQueueCS<T> }
procedure TThreadedQueueCS<T>.Clear;
var
obj : T;
begin
FQueueLock.Enter;
try
for obj in FQueue do
begin
if TypeInfo(T) = TypeInfo(TObject) then PObject(@obj){$IFNDEF FPC}.DisposeOf;{$ELSE}.Free;{$ENDIF}
end;
SetLength(FQueue,0);
finally
FQueueLock.Leave;
end;
{$IFDEF FPC}
FQueueCondVar.SetEvent;
{$ELSE}
FQueueCondVar.ReleaseAll;
{$ENDIF}
end;
constructor TThreadedQueueCS<T>.Create(AQueueDepth: Integer = 10; PushTimeout: Cardinal = INFINITE; PopTimeout: Cardinal = INFINITE);
begin
inherited Create;
SetLength(FQueue, AQueueDepth);
FQueueLock := TCriticalSection.Create;
{$IFDEF FPC}
FQueueCondVar := TEventObject.Create(nil, True, False, 'TQCS');
{$ELSE}
FQueueCondVar := TConditionVariableCS.Create;
{$ENDIF}
FPushTimeout := PushTimeout;
FPopTimeout := PopTimeout;
end;
destructor TThreadedQueueCS<T>.Destroy;
begin
DoShutDown;
FQueueLock.Free;
FQueueCondVar.Free;
inherited;
end;
procedure TThreadedQueueCS<T>.Grow(ADelta: Integer);
begin
FQueueLock.Enter;
try
SetLength(FQueue, Length(FQueue) + ADelta);
finally
FQueueLock.Leave;
end;
{$IFDEF FPC}
FQueueCondVar.SetEvent;
{$ELSE}
FQueueCondVar.ReleaseAll;
{$ENDIF}
end;
function TThreadedQueueCS<T>.PopItem: T;
var
LQueueSize: Integer;
begin
PopItem(LQueueSize, Result);
end;
function TThreadedQueueCS<T>.PopItem(var AQueueSize: Integer; var AItem: T): TWaitResult;
begin
AItem := Default(T);
FQueueLock.Enter;
try
Result := wrSignaled;
while (Result = wrSignaled) and (FQueueSize = 0) and not FShutDown do
begin
{$IFDEF FPC}
Result := FQueueCondVar.WaitFor(FPopTimeout);
{$ELSE}
Result := FQueueCondVar.WaitFor(FQueueLock, FPopTimeout);
{$ENDIF}
end;
if (FShutDown and (FQueueSize = 0)) or (Result <> wrSignaled) then Exit;
AItem := FQueue[FQueueOffset];
FQueue[FQueueOffset] := Default(T);
if FQueueSize = Length(FQueue) then
begin
{$IFDEF FPC}
FQueueCondVar.SetEvent;
{$ELSE}
FQueueCondVar.ReleaseAll;
{$ENDIF}
end;
Dec(FQueueSize);
Inc(FQueueOffset);
Inc(FTotalItemsPopped);
if FQueueOffset = Length(FQueue) then FQueueOffset := 0;
finally
AQueueSize := FQueueSize;
FQueueLock.Leave;
end;
end;
function TThreadedQueueCS<T>.PopItem(var AItem: T): TWaitResult;
var
LQueueSize: Integer;
begin
Result := PopItem(LQueueSize, AItem);
end;
function TThreadedQueueCS<T>.PopItem(var AQueueSize: Integer): T;
begin
PopItem(AQueueSize, Result);
end;
function TThreadedQueueCS<T>.PushItem(const AItem: T): TWaitResult;
var
LQueueSize: Integer;
begin
Result := PushItem(AItem, LQueueSize);
end;
function TThreadedQueueCS<T>.PushItem(const AItem: T; var AQueueSize: Integer): TWaitResult;
begin
FQueueLock.Enter;
try
Result := wrSignaled;
while (Result = wrSignaled) and (FQueueSize = Length(FQueue)) and not FShutDown do
begin
{$IFDEF FPC}
Result := FQueueCondVar.WaitFor(FPushTimeout);
{$ELSE}
Result := FQueueCondVar.WaitFor(FQueueLock, FPushTimeout);
{$ENDIF}
end;
if FShutDown or (Result <> wrSignaled) then Exit;
if FQueueSize = 0 then
begin
{$IFDEF FPC}
FQueueCondVar.SetEvent;
{$ELSE}
FQueueCondVar.ReleaseAll;
{$ENDIF}
end;
FQueue[(FQueueOffset + FQueueSize) mod Length(FQueue)] := AItem;
Inc(FQueueSize);
Inc(FTotalItemsPushed);
finally
AQueueSize := FQueueSize;
FQueueLock.Leave;
end;
end;
procedure TThreadedQueueCS<T>.DoShutDown;
begin
FShutDown := True;
{$IFDEF FPC}
FQueueCondVar.SetEvent;
{$ELSE}
FQueueCondVar.ReleaseAll;
{$ENDIF}
end;
{ TThreadedQueueList<T> }
constructor TThreadedQueueList<T>.Create(AQueueDepth: Integer = 10; PushTimeout: Cardinal = INFINITE; PopTimeout: Cardinal = INFINITE);
begin
inherited Create;
fQueue := TQueue<T>.Create;
fQueue.Capacity := AQueueDepth;
fQueueSize := 0;
fQueueLock := TCriticalSection.Create;
{$IFDEF FPC}
FQueueCondVar := TSimpleEvent.Create; //TEventObject.Create(nil, False, False, 'TQL');
{$ELSE}
fQueueCondVar := TConditionVariableCS.Create;
{$ENDIF}
fPushTimeout := PushTimeout;
fPopTimeout := PopTimeout;
end;
destructor TThreadedQueueList<T>.Destroy;
begin
DoShutDown;
fQueueLock.Free;
fQueueCondVar.Free;
fQueue.Free;
inherited;
end;
procedure TThreadedQueueList<T>.Grow(ADelta: Integer);
begin
fQueueLock.Enter;
try
fQueue.Capacity := fQueue.Capacity + ADelta;
finally
fQueueLock.Leave;
end;
{$IFDEF FPC}
FQueueCondVar.SetEvent;
{$ELSE}
FQueueCondVar.ReleaseAll;
{$ENDIF}
end;
function TThreadedQueueList<T>.PopItem: T;
var
LQueueSize: Integer;
begin
PopItem(LQueueSize, Result);
end;
{$IFDEF FPC}
function TThreadedQueueList<T>.PopItem(var AQueueSize: Integer; var AItem: T): TWaitResult;
//var
//crono : TChronometer;
begin
AItem := Default(T);
//crono := TChronometer.Create(False);
try
Result := wrSignaled;
//writeln('popitem');
//crono.Start;
while (Result = wrSignaled) and (fQueueSize = 0) and not fShutDown do
begin
//crono.Start;
Result := FQueueCondVar.WaitFor(FPopTimeout);
//crono.Stop;
//writeln('in: ' + crono.ElapsedTime);
//if result = twaitresult.wrError then result := twaitresult.wrError;
end;
//crono.Stop;
//writeln('out: ' + crono.ElapsedTime);
fQueueLock.Enter;
try
if (FShutDown and (fQueueSize = 0)) or (Result <> wrSignaled) then Exit;
AItem := fQueue.Extract;
Dec(FQueueSize);
Inc(fTotalItemsPopped);
finally
fQueueLock.Leave;
end;
finally
AQueueSize := fQueueSize;
end;
end;
{$ELSE}
function TThreadedQueueList<T>.PopItem(var AQueueSize: Integer; var AItem: T): TWaitResult;
begin
AItem := Default(T);
fQueueLock.Enter;
try
Result := wrSignaled;
while (Result = wrSignaled) and (fQueueSize = 0) and not fShutDown do
begin
Result := FQueueCondVar.WaitFor(FQueueLock, FPopTimeout);
end;
if (FShutDown and (fQueueSize = 0)) or (Result <> wrSignaled) then Exit;
AItem := fQueue.Extract;
if fQueueSize = fQueue.Count then
begin
FQueueCondVar.ReleaseAll;
end;
Dec(FQueueSize);
Inc(fTotalItemsPopped);
finally
AQueueSize := fQueueSize;
fQueueLock.Leave;
end;
end;
{$ENDIF}
function TThreadedQueueList<T>.PopItem(var AItem: T): TWaitResult;
var
LQueueSize: Integer;
begin
Result := PopItem(LQueueSize, AItem);
end;
function TThreadedQueueList<T>.PopItem(var AQueueSize: Integer): T;
begin
PopItem(AQueueSize, Result);
end;
function TThreadedQueueList<T>.PushItem(const AItem: T): TWaitResult;
var
LQueueSize: Integer;
begin
Result := PushItem(AItem, LQueueSize);
end;
{$IFDEF FPC}
function TThreadedQueueList<T>.PushItem(const AItem: T; var AQueueSize: Integer): TWaitResult;
begin
FQueueLock.Enter;
try
Result := wrSignaled;
//while (Result = wrSignaled) and (fQueueSize = fQueue.Count) and not fShutDown do
//begin
// Result := fQueueCondVar.WaitFor(fQueueLock, fPushTimeout);
//end;
if fShutDown or (Result <> wrSignaled) then Exit;
//if fQueueSize = 0 then
//begin
// FQueueCondVar.SetEvent;
//end;
fQueue.Enqueue(AItem);
Inc(FQueueSize);
Inc(fTotalItemsPushed);
finally
AQueueSize := fQueueSize;
FQueueLock.Leave;
//FQueueCondVar.SetEvent;
end;
end;
{$ELSE}
function TThreadedQueueList<T>.PushItem(const AItem: T; var AQueueSize: Integer): TWaitResult;
begin
FQueueLock.Enter;
try
Result := wrSignaled;
//while (Result = wrSignaled) and (fQueueSize = fQueue.Count) and not fShutDown do
//begin
// Result := fQueueCondVar.WaitFor(fQueueLock, fPushTimeout);
//end;
if fShutDown or (Result <> wrSignaled) then Exit;
if fQueueSize = 0 then FQueueCondVar.ReleaseAll;
fQueue.Enqueue(AItem);
Inc(FQueueSize);
Inc(fTotalItemsPushed);
finally
AQueueSize := fQueueSize;
FQueueLock.Leave;
end;
end;
{$ENDIF}
procedure TThreadedQueueList<T>.DoShutDown;
begin
fShutDown := True;
{$IFDEF FPC}
FQueueCondVar.SetEvent;
{$ELSE}
FQueueCondVar.ReleaseAll;
{$ENDIF}
end;
{$IFNDEF FPC}
{ TThreadObjectList<T> }
procedure TThreadObjectList<T>.Add(const Item: T);
begin
LockList;
try
if (Duplicates = dupAccept) or (fList.IndexOf(Item) = -1) then fList.Add(Item)
else if Duplicates = dupError then raise EListError.CreateFmt(SDuplicateItem, [fList.ItemValue(Item)]);
finally
UnlockList;
end;
end;
procedure TThreadObjectList<T>.Clear;
begin
LockList;
try
fList.Clear;
finally
UnlockList;
end;
end;
constructor TThreadObjectList<T>.Create(OwnedObjects : Boolean);
begin
inherited Create;
fLock := TObject.Create;
fList := TObjectList<T>.Create;
fDuplicates := dupIgnore;
end;
destructor TThreadObjectList<T>.Destroy;
begin
LockList;
try
fList.Free;
inherited Destroy;
finally
UnlockList;
fLock.Free;
end;
end;
function TThreadObjectList<T>.GetItem(aIndex: Integer): T;
begin
LockList;
try
Result := fList[aIndex];
finally
UnlockList;
end;
end;
function TThreadObjectList<T>.LockList: TObjectList<T>;
begin
System.TMonitor.Enter(fLock);
Result := fList;
end;
procedure TThreadObjectList<T>.Remove(const Item: T);
begin
RemoveItem(Item, TDirection.FromBeginning);
end;
procedure TThreadObjectList<T>.RemoveItem(const Item: T; Direction: TDirection);
begin
LockList;
try
fList.RemoveItem(Item, Direction);
finally
UnlockList;
end;
end;
procedure TThreadObjectList<T>.SetItem(aIndex: Integer; aValue: T);
begin
LockList;
try
fList[aIndex] := aValue;
finally
UnlockList;
end;
end;
procedure TThreadObjectList<T>.UnlockList;
begin
System.TMonitor.Exit(fLock);
end;
{$ENDIF}
{ TAnonymousThread }
constructor TAnonymousThread.Create(aProc : TProc; aSynchronize : Boolean);
begin
fThread := TAdvThread.Create(aProc,aSynchronize);
end;
class function TAnonymousThread.Execute(aProc: TProc): IAnonymousThread;
begin
Result := TAnonymousThread.Create(aProc,False);
end;
class function TAnonymousThread.Execute_Sync(aProc: TProc): IAnonymousThread;
begin
Result := TAnonymousThread.Create(aProc,True);
end;
function TAnonymousThread.OnTerminate(aProc: TProc): IAnonymousThread;
begin
Result := Self;
fThread.OnTerminate(aProc,False);
end;
function TAnonymousThread.OnTerminate_Sync(aProc: TProc): IAnonymousThread;
begin
Result := Self;
fThread.OnTerminate(aProc,True);
end;
procedure TAnonymousThread.Start;
begin
fThread.Start;
end;
{ TTask }
constructor TTask.Create(aParamArray : array of const; aOwnedParams : Boolean; aTaskProc : TTaskProc);
var
i : Integer;
begin
fTaskStatus := TWorkTaskStatus.wtsPending;
fExecuteWithSync := False;
fTerminateWithSync := False;
fExceptionWithSync := False;
fOwnedParams := aOwnedParams;
SetLength(fParamArray,High(aParamArray)+1);
for i := Low(aParamArray) to High(aParamArray) do
begin
fParamArray[i].Create(aParamArray[i]);
{$IFDEF FPC}
fParamArray[i]._AddRef;
{$ENDIF}
end;
fExecuteProc := aTaskProc;
fEnabled := False;
end;
destructor TTask.Destroy;
var
i : Integer;
begin
//free passed params
if fOwnedParams then
begin
for i := Low(fParamArray) to High(fParamArray) do
begin
{$IFDEF FPC}
fParamArray[i]._Release;
{$ENDIF}
if (fParamArray[i].DataType = dtObject) and (fParamArray[i].AsObject <> nil) then fParamArray[i].AsObject.Free;
end;
end;
fParamArray := nil;
inherited;
end;
procedure TTask.DoException(aException : Exception);
begin
fTaskStatus := TWorkTaskStatus.wtsException;
if Assigned(fExceptProc) then fExceptProc(Self,aException)
else raise aException;
end;
procedure TTask.DoExecute;
begin
fTaskStatus := TWorkTaskStatus.wtsRunning;
if Assigned(fExecuteProc) then fExecuteProc(Self);
fTaskStatus := TWorkTaskStatus.wtsDone;
end;
procedure TTask.DoTerminate;
begin
if Assigned(fTerminateProc) then fTerminateProc(Self);
end;
function TTask.GetIdTask: Int64;
begin
Result := fIdTask;
end;
procedure TTask.SetIdTask(Value : Int64);
begin
fIdTask := Value;
end;