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Migrating to something more like scheme
Signed-off-by: Keith Packard <keithp@keithp.com>
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Collect memory, return amount free.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This provides call/cc and makes 'stacks' visible to the application.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Cut&paste error.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Remove exti from the build list to make things fit.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This assumes that macros are all pure functions, which should be true
for syntactic macros.
Signed-off-by: Keith Packard <keithp@keithp.com>
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This sticks a few globals past the end of the heap and then asks the
OS to save the heap. On restore, the heap is re-populated by the OS
and then various global variables reset.
Signed-off-by: Keith Packard <keithp@keithp.com>
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lots more builtins
Signed-off-by: Keith Packard <keithp@keithp.com>
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Progn as a builtin will help with tail-recursion.
while provides for loops until tail-recursion works :-)
read and eval are kinda useful.
Signed-off-by: Keith Packard <keithp@keithp.com>
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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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Not working yet
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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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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Signed-off-by: Keith Packard <keithp@keithp.com>
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