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Permit stack allocation from alternative memory pool on VxWorks #1463

@jphickey

Description

@jphickey

Is your feature request related to a problem? Please describe.
VxWorks will invoke malloc() to obtain a stack for new tasks if the OS_TaskCreate() call is passed NULL for a stack pointer. This gets memory from the system heap which is not desirable for some users.

Describe the solution you'd like
Allow customization of the pool from which this memory is derived.

Describe alternatives you've considered
N/A

Additional context
Stakeholder request/need.

Requester Info
Joseph Hickey, Vantage Systems, Inc.

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