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based on an earlier version of the Wolfram Language.
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Resource Sharing in Parallel Computing
Mathematica's symbolic parallel computation architecture provides a uniquely convenient mechanism for communicating and sharing resources between parallel processes. Its foundation is a virtual shared memory model, implemented on top of MathLink-based message passing, running seamlessly on arbitrary clusters or networks of processors.
Shared Variables and Functions
SetSharedVariable set symbols to share values across subkernels
SetSharedFunction set functions to share downvalues across subkernels
$SharedVariables, $SharedFunctions lists of shared variables, functions
UnsetShared stop sharing variables or functions
CriticalSection synchronize concurrent access to a shared resource
Broadcasting Definitions
DistributeDefinitions distribute definitions to all parallel subkernels
ParallelNeeds load the same package into all parallel subkernels
ParallelEvaluate evaluate an expression on all parallel subkernels