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path: root/src/lisp/ao_lisp_save.c
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* altos/lisp: Cache freed cons and stack itemsKeith Packard2016-11-17
| | | | | | | | | Track freed cons cells and stack items from the eval process where possible so that they can be re-used without needing to collect. This dramatically reduces the number of collect calls. Signed-off-by: Keith Packard <keithp@keithp.com>
* altos/lisp: Append a CRC to the saved image to validate on restoreKeith Packard2016-11-17
| | | | | | | 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>
* altos/lisp: Add save/restore infrastructure. Needs OS support to work.Keith Packard2016-11-17
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>