Synchronization Constructs
ATOMIC Directive

• The ATOMIC directive specifies that a specific memory location must be updated atomically, rather than letting multiple threads attempt to write to it. In essence, this directive provides a mini-CRITICAL section.

Format:

Fortran	!$OMP ATOMIC statement_expression
C/C++	#pragma omp atomic newline statement_expression

Restrictions:

• The directive applies only to a single, immediately following statement

• An atomic statement must follow a specific syntax. See the most recent OpenMP specs for this.