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Stored procedures
Marks the end of critical section: the code will be run by another thread.
To mark the start of critical section, use CriticalSectionStart.
WindowsLinuxUniversal Windows 10 AppiPhone/iPadApple Watch 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
WindowsLinuxUniversal Windows 10 AppiPhone/iPadApple Watch
// 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
WindowsLinuxUniversal Windows 10 AppiPhone/iPadApple Watch

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.
WindowsLinuxUniversal Windows 10 AppiPhone/iPadApple Watch

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: wd270vm.dll
Minimum version required
  • Version 9
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