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The CRC is actually of the ROM bits, so we can tell if the restored
image relates to the currently running code.
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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The memmove may be overlapping, so make sure it happens only once by
just checking whether move_size has been set, rather than looking at
ao_lisp_moving; that doesn't get set when moving a noted cons as that
still needs to be walked at a later time.
Fix up the various looping move functions to all use the same
pattern. Atom was busted.
Signed-off-by: Keith Packard <keithp@keithp.com>
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These functions are pretty large and end up consuming quite a bit of
space if inlined everywhere they are used.
Signed-off-by: Keith Packard <keithp@keithp.com>
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These two operations both wanted to walk the referenced objects;
sharing is caring.
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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Handle memory compaction in places where we've got pointers into the
heap across an allocation operation. Either re-compute the values from
managed global references or add new roots across the allocation.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Also make it an exception to hit eof in the middle of an sexpr.
Signed-off-by: Keith Packard <keithp@keithp.com>
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No need to open code this sequence of operations.
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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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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Failing this leads to broken formals chains
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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Ad-hoc code was incomprehensible and I couldn't make 'cond' work, so
I'm starting over.
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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