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Dan Ellis authored
Detail: PipeFS uses UpCall 6 (Sleep) to signal that the reading process can sleep, using the size of the file as a pollword. Thus when any data is written into the pipe, the sleeping process will be woken up. If an attempt is made to close the file handle, UpCall 7 (Sleep No More) is broadcast to allow anyone to object to the closure occurring. Pipe_Close wasn't checking the error return from making this call, which was an error. It will now propogate this error up to fileswitch upon an attempt being made to close the file while a process is sleeping on it. 32-bitness involved changing a load of TEQPs for RestPSRs, and fixing some functions which had forgotten to use [sp, #Proc_RegOffset]. Also added !Mk and added stripdepend to MkClean. Admin: Tested on dev board and RiscPC running a fairly recent Ursula build. Version 0.21. Tagged as 'PipeFS-0_21'
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