ParallelTaskExecuteAfterAll (Function)

ONLINE HELP
WINDEV, WEBDEV AND WINDEV MOBILE

Version:

Home | Sign in | English

Help

WLanguage

WLanguage functions

Standard functions

Process management functions

Parallel tasks

Prefix syntax

ParallelTaskExecuteAfterAll

Presentation

Example

Related examples

See also

ParallelTaskExecuteAfterAll (Function)

In french: TâcheParallèleExécuteAprèsToutes

Indicates a continuation parallel task that will be run when all the tasks found in an array of parallel tasks are ended.

Example

See additional examples

// Starts two tasks
t1 is ParallelTask = ParallelTaskExecute(Proc1)
t2 is ParallelTask = ParallelTaskExecute(Proc2)
// The ContinuationProc procedure will be run when the two tasks are ended
ParallelTaskExecuteAfterAll([t1,t2], ContinuationProc)

Syntax

Indicating a procedure that will be run after all the previous tasks Hide the details

<Result> = ParallelTaskExecuteAfterAll(<Previous tasks> , <Continuation procedure> [, <Parameters> [, <Options>]])

<Result>: ParallelTask variable

ParallelTask variable corresponding to the continuation task.

<Previous tasks>: Array of ParallelTasks

Name of the Array of ParallelTask variable containing the previous tasks.

<Continuation procedure>: Character string or Procedure variable

Procedure to run after the execution of all previous tasks. This parameter corresponds to:
the name of the WLanguage procedure to run.
the name of Procedure variable corresponding to the procedure to run.

<Parameters>: List of values enclosed in brackets and separated by commas

Parameters of procedure to run. This list of parameters has the following format:

(<Parameter 1>, ..., <Parameter N>)

where:
<Parameter 1>: First procedure parameter.
...
<Parameter N>: Nth procedure parameter.
The keyword ReturnedValuesPreviousTasks is used to pass the returned values of previous tasks to the continuation procedure as parameters. The order of these values corresponds to the order specified by <Previous tasks> (array of previous tasks).

<Options>: Optional Integer constant (or combination of constants)

Options of task to run:
ptoDelayedCopyHFSQLContext
(Default value) Triggers a light copy of HFSQL context during the first access to the HFSQL data.
ptoFullCopyHFSQLContext Triggers the immediate copy of the current HFSQL context.
Recommended, for example, if the parallel task must take into account the current positions in the files and queries of the context of the caller.
ptoLightCopyHFSQLContext Triggers the immediate copy of a part of the current HFSQL context.
Only the directories containing the data files in HFSQL Classic mode and/or the connections in HFSQL Client/Server mode are stored.
ptoMainThread Runs the task in the main thread.
This constant can be combined with one of the other constants.

Indicating a described task that will be run after all the previous tasks Hide the details

<Result> = ParallelTaskExecuteAfterAll(<Previous tasks> , <Continuation task>)

<Result>: ParallelTask variable

ParallelTask variable corresponding to the continuation task.

<Previous tasks>: Array of ParallelTasks

Name of the Array of ParallelTask variable containing the previous tasks.

<Continuation task>: ParallelTask variable

Name of the ParallelTask variable corresponding to the continuation task.

Describing a task that will be run after all the previous tasks Hide the details

<Result> = ParallelTaskExecuteAfterAll(<Previous tasks> , <Description of continuation task>)

<Result>: ParallelTask variable

ParallelTask variable corresponding to the continuation task.

<Previous tasks>: Array of ParallelTasks

Name of the Array of ParallelTask variable containing the previous tasks.

<Description of continuation task>: Description of ParallelTask variable

Name of the Description of the ParallelTask variable describing the continuation task.

Remarks

ParallelTaskExecuteAfterAll is a non-blocking function.
If the function is called while all the tasks are already ended, the continuation will be run as soon as possible.
If the function is called while a task is already canceled, the continuation will not be run.
If a previous task is canceled while a continuation was created, the continuation will not be run.
In the code of the continuation task, the MyPreviousParallelTasks keyword is used to handle the previous tasks.

Related Examples:

Unit examples (WINDEV): Using parallel tasks

[ + ] The parallel tasks are used to speed up the process times and to improve the reactivity of an application.
This example presents the functions and types of variables required to use the parallel tasks:
- running parallel tasks,
- interaction with the controls,
- continuation tasks.

Component: wd280vm.dll