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I'm trying to build a python timeout exception that runs in milliseconds.
The python signal.alarm function has a 1 second resolution.
How would one get an equivalent function that requests a SIGALRM signal to a given process in, say milliseconds, as opposed to seconds?
I've found no simple solutions as of yet.
Thanks in advance for your input.
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The alarm() function is used to generate a SIGALRM signal after a specified amount of time elapsed.
SIGALRM is an asynchronous signal. The SIGALRM signal is raised when a time interval specified in a call to the alarm or alarmd function expires. Because SIGALRM is an asynchronous signal, the SAS/C library discovers the signal only when you call a function, when a function returns, or when you issue a call to sigchk .
Since the kernel already keeps per-process data structures ( task_struct ), it just stores the desired alarm time in there. Then Linux just uses its internal timer system to register a callback at the specified time. Said callback then delivers the SIGALRM to your process.
Use signal.setitimer() instead.
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