BUILT-IN MATHEMATICA SYMBOL

CriticalSection

CriticalSection[{var₁, var₂, ...}, expr]
locks the variables with respect to parallel computation, evaluates expr, then releases the .

Details Details

At most one instance of a critical section with the same lock variable is allowed to run concurrently on any parallel kernel.
Variables used as locks should not have a value in the master kernel.

Protect a block of code from interference by other threads:

Out[2]=

Without protecting access to the update code, subkernels may overwrite results:

Out[3]=

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