ExecutionMode (Function)

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Disabling JITc
Optimizing the external calls
Managing errors

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ExecutionMode (Function)

In french: ModeExécution

Used to:

find out and/or modify the behavior of the application or site when some errors are generated. Depending on the selected runtime mode, these errors can be ignored or they can generate some error messages. In some cases, ExecutionMode can be used to restore the behavior of WINDEV 5.5.
optimize the calls to the functions declared externally. Used to optimize the runtime speed of the application in 2 cases:
- Procedures declared externally
- Codes compiled dynamically, call to a global or local procedure of the project.
find out and/or modify how the JITc is used by the application. The application uses JITc by default. It can only be disabled.
Versions 15 and later
find out and/or modify the management mode of low references for all the instantiated objects.
New in version 15
find out and/or modify the management mode of low references for all the instantiated objects.
find out and/or modify the management mode of low references for all the instantiated objects.

Versions 18 and later

This function is now available in Windows Store apps mode.

This function is now available for iPhone/iPad applications.

New in version 18

This function is now available in Windows Store apps mode.

This function is now available for iPhone/iPad applications.

This function is now available in Windows Store apps mode.

This function is now available for iPhone/iPad applications.

Versions 21 and later

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

Example

// Test mode?
IF InTestMode() = True THEN
ExecutionMode(NormalMode)
ELSE
// Apply the operating mode of WINDEV 5.5
// to avoid displaying some errors
ExecutionMode(PermissiveMode)
END

Syntax

Retrieving the current runtime mode Hide the details

<Result> = ExecutionMode()

<Result>: Combination of Integer constants

Current runtime mode of application or site:
ExternalCallsOptimized Optimizes the management of external calls to procedures. This parameter is associated with one of the two following constants.
This constant is not available.
DisableOptimizedExecution JITc (Just In Time compilation) is disabled.
Versions 15 and later
ForceDestructorNonDynamicObject
New in version 15
ForceDestructorNonDynamicObject
ForceDestructorNonDynamicObject Forces the destruction of non-dynamic objects (even if a strong reference was taken).
modeFormerOperatingModeDuration The Duration properties keep the operating mode used in version 12.
NormalMode The errors that occurred generate error messages.
PermissiveMode The errors that occurred are ignored (WINDEV 5.5 or WEBDEV 1.5 mode).

Modifying the current runtime mode Hide the details

<Result> = ExecutionMode(<New runtime mode>)

<Result>: Integer constant

Runtime mode of application or site after modification.
ExternalCallsOptimized Optimizes the management of external calls to procedures. This parameter is associated with one of the two following constants.
This constant is not available.
DisableOptimizedExecution JITc (Just In Time compilation) is disabled.
Versions 15 and later
ForceDestructorNonDynamicObject
New in version 15
ForceDestructorNonDynamicObject
ForceDestructorNonDynamicObject Forces the destruction of non-dynamic objects (even if a strong reference was taken).
modeFormerOperatingModeDuration The Duration properties keep the operating mode used in version 12.
NormalMode The errors that occurred generate error messages.
PermissiveMode The errors that occurred are ignored (WINDEV 5.5 or WEBDEV 1.5 mode).

<New runtime mode>: Integer constant

New runtime mode to apply.
ExternalCallsOptimized Optimizes the management of external calls to procedures. This parameter is associated with one of the two following constants.
This constant is not available.
DisableOptimizedExecution Disables JITc (Just In Time compilation).
Versions 15 and later
ForceDestructorNonDynamicObject
New in version 15
ForceDestructorNonDynamicObject
ForceDestructorNonDynamicObject Forces the take of low reference for all the objects.
modeFormerOperatingModeDuration The Duration properties keep the operating mode used in version 12.
NormalMode The errors that occurred generate error messages.
PermissiveMode The errors that occurred are ignored (WINDEV 5.5 or WEBDEV 1.5 mode)

Remarks

Disabling JITc

To disable JIT technology in an application, it is recommended to use ExecutionMode with the DisableOptimizedExecution constant in the project initialization code. In this case, only the elements loaded before running the project initialization code (components, sets of procedures, classes) will use JITc.

To disable JITc for a WINDEV application (e.g. problem caused by JITc), it is recommended to modify (or create) the <Executable name>.WX file. This file must be found beside the executable of the application and it must contain the following information:

[WD_EXECUTION]
OPTIM_EXECUTION=0

Optimizing the external calls

Caution: When a project is migrated from version 5.5, the permissive mode is automatically added into the initialization code of the project during the migration. The following code line allows you to take into account the optimization of external calls:

ExecutionMode(PermissiveMode + ExternalCallsOptimized)

Managing errors

The table below presents the behavior of the application according ot the errors that occurred:

Error case	PermissiveMode	NormalMode

Reading a subscript outside the range of a Table, List Box or Combo Box control. Examples: `s = ListA[-1] n = ListB[56]..Color`	The program returns '0' or an empty string ("") depending on the property used.	A runtime error is displayed. Example: "Invalid subscript: [-1]."
Writing into a negative subscript of a List Box, Table or Combo Box control. Example: `List[-1] = "Smith"`	The code line is ignored	A runtime error is displayed. Example: "Invalid subscript: [-1]."
Writing into a too large subscript of a List Box, Table or Combo Box control. Example: `LIST[54] = "Smith"`	An empty element is inserted at the end of the List Box control and takes the specified value.	A runtime error is displayed. Example: "Invalid subscript: [54]"
Using Open, OpenChild, OpenSister with a window name containing additional space characters. Using Open, OpenMobileWindow, OpenChild, OpenSister with a window name containing additional space characters. Example: `Open("WIN1 ")`	The additional space characters are deleted.	A runtime error is displayed. Example: "The 'WIN1' window cannot be found"
Using the functions for managing popup and drop-down menus with a menu number that does not exist. Example: `MenuMark(WIN1, 54645)`	The function returns '0' and ErrorInfo is filled.	A runtime error is displayed. Example: "The option specified [54645] does not exist in the menu"
Using Right and Left with a negative number of characters to extract. Example: `Left("abcdef", -1)`	The function returns an empty string ("").	The function returns EOT and ErrorInfo is filled.
Using Middle with a start position that is negative and/or with a negative number of characters to extract. Example: `Middle("abcdef", -2, -4)`	The function: starts the extraction from the beginning of the string if the start position is negative. returns the entire source string.	The function returns EOT and ErrorInfo is filled.

Component: wd260vm.dll