| Commit message (Collapse) | Author | Age | Files | Lines |
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sieve.tlv is 50% slower (18s vs 12s) with the new function call
instrumentation.
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I'm starting to get quite indisciplined about where I introduce global
bindings. Seems reasonable since any modules in Teliva will come from
within the framework.
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Teliva isn't yet smart enough to know the caller of an indirect function
where the function being called goes through a local variable.
I'd expected fixing this to be a long death march. However, there's a
shockingly easy fix: just make every indirect call go through an
additional direct function call.
My policy for zet.tlv was that function 'main' could open any file. This
stopped working since I introduced spawn_main. But with this commit it's
working again.
I can also drop all my special-casing of 'main' since it's now a regular
Lua call.
We still can't rely on the caller of an indirect call. That affects
start_reading and start_writing, which really need to be part of the
framework.
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File operations now always return a channel (or nil on error or
permission denied).
When start_reading() from a filename, you can repeatedly :recv() from
the channel it returns.
When :recv() returns nil, you're at the end of the file. Stop.
When you start_writing() to a filename, you can repeatedly :send() to
the channel it returns.
When you're done writing, :close() the channel. Writes to the file won't
be externally visible until you do.
To make this work I'm now always starting up the scheduler, so I need to
fix sieve.tlv.
Transparently running the scheduler is an abstraction, and whenever I
create an abstraction I always worry about how it might fail. There's
a hopefully-clear error when you read past end of a file.
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In particular, the periods looked like passing tests.
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Also a little test program to demo channels in action.
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