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Brian Behlendorf
f752b46eb3
This is a minor extension to the condition variable API to allow for reasonable signal handling on Linux. The cv_wait() function by definition must wait unconditionally for cv_signal()/cv_broadcast() before waking it. This makes it impossible to woken by a signal such as SIGTERM. The cv_wait_interruptible() function was added to handle this case. It behaves identically to cv_wait() with the exception that it waits interruptibly allowing a signal to wake it up. This means you do need to be careful and check issig() after waking.