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Provide an abstraction for the OS interface so that it
can build more cleanly on Linux and AltOS. Add defun macro.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Needed an extra stack frame to stash the pre-macro state. This
simplified macro processing quite a bit; a macro now just evaluates
the function and then sends that result to be evaluated again.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Not working yet
Signed-off-by: Keith Packard <keithp@keithp.com>
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Use a boolean array to note cons cells which would otherwise recurse,
then loop until that array is empty.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Use global ao_lisp_stack instead of local stack so that gc
moves of that item work.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Pass reference to move API so it can change the values in-place, then
let it return '1' when the underlying object has already been moved to
shorten GC times.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Signed-off-by: Keith Packard <keithp@keithp.com>
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This enables changing values of atoms declared as constants, should
enable lets, and with some work, even lexical scoping.
this required changing the constant computation to run
ao_lisp_collect() before dumping the block of constant data, and that
uncovered some minor memory manager bugs.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Along with other small fixes
Signed-off-by: Keith Packard <keithp@keithp.com>
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This makes all lisp objects use 16-bit ints for references so we can
hold more stuff in small amounts of memory. Also adds a separate
constant pool of lisp objects for builtins, initial atoms and constant
lisp code.
Now builds (and runs!) on the nucleo-32 boards.
Signed-off-by: Keith Packard <keithp@keithp.com>
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