What does Windows error code 121 (ERROR_SEM_TIMEOUT) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The semaphore timeout period has expired.

Could be also:
Constant	Type	OS
EREMOTEIO	errno	Linux
ESOCKTNOSUPPORT	errno	Solaris
ENOLINK	errno	Windows
MISMATCHED_HAL	BugCheck Code	Windows

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