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Signal -- signal a task
Signal(task, signals)
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void Signal(struct Task *,ULONG);
This function signals a task with the given signals. If the task
is currently waiting for one or more of these signals, it will be
made ready and a reschedule will occur. If the task is not waiting
for any of these signals, the signals will be posted to the task
for possible later use. A signal may be sent to a task regardless
of whether it is running, ready, or waiting.
This function is considered "low level". Its main purpose is to
support multiple higher level functions like PutMsg.
This function is safe to call from interrupts.
task - the task to be signalled
signals - the signals to be sent
Wait(), SetSignal()
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