#pragma omp critical

Description

The omp critical directive identifies a section of code that must be executed by a single thread at a time.

Syntax

#pragma omp critical [(name)]
   statement_block

where name can optionally be used to identify the critical region. Identifiers naming a critical region have external linkage and occupy a namespace distinct from that used by ordinary identifiers.

Notes

A thread waits at the start of a critical region identified by a given name until no other thread in the program is executing a critical region with that same name. Critical sections not specifically named by omp critical directive invocation are mapped to the same unspecified name.

Related References

Pragmas to Control Parallel Processing IBM Copyright 2003