CriticalSectionEnd (Function)

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WLanguage functions

Standard functions

Process management functions

Threads, semaphores, signals and mutex

WLanguage functions

CriticalSectionEnd

Presentation

Example

Miscellaneous

See also

CriticalSectionEnd (Function)

In french: SectionCritiqueFin

Marks the end of critical section: the code will be run by another thread.

To mark the start of critical section, use CriticalSectionStart.

When the calls to CriticalSectionStart and CriticalSectionEnd are in the same section of the code, it is recommended to use the type CriticalSection and the syntax USE ... IN.
Example:

// Using a Critical Section variable
S is CriticalSection

// Use for a code block
//---------------------------
USING S IN
// code protected by the critical section
// only one thread will execute this code at a given moment
END

Example

// Critical section on a variable
t is array <critical section> of int
CriticalSectionStart(t)
// Operations on the array by one only thread at a time
CriticalSectionEnd(t)

// Use of a named critical section
CriticalSectionStart("MySection")
// Two threads will not be able to run this code at the same time
...
CriticalSectionEnd("MySection")

Syntax

Ending a critical section on a code section: using the CriticalSection type Hide the details

CriticalSectionStart(<Critical section>)

<Critical section>: CriticalSection variable

Name of the CriticalSection variable used to identify the critical section.

Ending a critical section on a variable Hide the details

CriticalSectionEnd([<Variable name>])

<Variable name>: Any type

Name of WLanguage variable that was protected in a critical section by CriticalSectionStart. This variable must be defined with the attribute <critical section>.

Ending a named critical section on a code section Hide the details

CriticalSectionEnd([<Section name>])

<Section name>: Optional character string

Identifies the critical section.

Remarks

Miscellaneous

For more details on critical sections, see Managing the critical sections.
If a thread is destroyed while it is found in a critical section, the critical section is automatically freed.
A single thread is allowed in all the sections with the same name.
If sections use a different name, a thread can run the code of one section while another thread runs the code of another section.

Component: wd280vm.dll