🐛Add mutex control for printf and cout #570
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Summary:
Added mutex control to protect printf and cout from causing utf-8 encoding errors due to race conditions. This is done by preventing context switches while prvWriteBytesToBuffer() and prvReadBytesToBuffer() is executing.
Motivation:
References (optional):
BUG: Multiple threads writing to stdout can cause encoding errors #500
Test Plan:
It is difficult to verify that the changes entirely prevents utf-8 encoding errors since the race condition is difficult to reproduce consistently.