[1673] in java-interest
Re: Threads don't make sense
daemon@ATHENA.MIT.EDU (Chris Warth)
Wed Sep 13 19:26:37 1995
Date: Wed, 13 Sep 1995 12:42:13 -0700
From: csw@scndprsn.Eng.Sun.COM (Chris Warth)
To: java-interest@java.Eng.Sun.COM, mpasqui@UOFT02.UTOLEDO.EDU
>
> I'm kind of confused on the 'yield' issue. As I understand it
> (which could be my first problem) threads of the same priority will
> only yield the CPU to threads of higher priority.
This is an over-simplification. Threads will only yield to higher
priority processes as long as they remain "runnable". There are lots
of conditions under which the thread is no longer runnable. For
instance, a thread become "blocked" (not runnable) whenever any of the
following occur:
1. when waiting to enter a monitor that is owned by another thread,
2. when waiting on a condition variable,
3. when doing a system call like read
or open that might block (those are wrapped in monitors on solaris now
so it is a just a special case of #1 or #2)
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