mesecons

8 Commits

Author	SHA1	Message	Date
Christopher Head	f61b1affea	Let things fall behind movestones (#421 ) * Let things fall behind movestones	2018-07-23 13:14:05 +03:00
Christopher Head	2b096f050d	Limit and optimize digiline_send (#379 ) * Close vulnerability and optimize digiline_send `digiline_send` as it previously existed was vulnerable to a time-of-check-to-time-of-use vulnerability in which a table could be sent, size-checked, and then modified after the send but before delivery. This would allow larger tables to be sent. It was also slow because it called `minetest.serialize`. Fix both of these by implementing custom message cleanup logic which simultaneously computes the message’s cost. * Clean up interaction with Digilines Use `minetest.global_exists` to avoid an undefined global variable warning when operating a Luacontroller with Digilines not available. Use the new `digilines` table in preference to the old `digiline` table. * Copy received messages When a Digiline message is received at a Luacontroller, copy it so that local modifications made by the Luacontroller code will not modify copies of the table that are being passed to other nodes on the Digiline network.	2018-01-13 22:27:00 +03:00
Christopher Head	203aaf3c90	Remove an unused function.	2016-11-17 14:55:02 +01:00
Christopher Head	8e6536ca2e	Simplify turnon/turnoff. It is no longer possible for get_node_force to return nil if the target location does, in fact, exist, because a VM will always be able to load it (whereas a forceload might not, due to exhaustion of forceload resources). So it is no longer necessary to handle get_node_force returning nil by deferring processing.	2016-08-24 00:42:40 -07:00
Christopher Head	bc9d4c2d5a	Use VM transactions for conductor state changes. VoxelManipulator-based transactions are used to hopefully speed up scanning and replacing of networks of conductors when receptors start or stop driving signals into them.	2016-08-24 00:42:40 -07:00
Christopher Head	6d79272ed4	Implement VoxelManipulator-based transactions. Rather than calling out through the Lua-to-C API for each node that needs to be read or written, a group of map reads (and optionally writes) can be grouped into a transaction. Access to map data within the transaction is provided at high speed by means of VoxelManipulators. Once the reads and writes are finished, the transaction can be committed or aborted.	2016-08-24 00:42:38 -07:00
Christopher Head	564cee346a	Use VoxelManipulators for get_node_force. A VoxelManipulator, when asked to read a mapblock, in addition to making that mapblock available to the caller, also pulls it into the server’s map cache, thus making get_node calls in the immediate future succeed. This has the dual advantages that not every mapblock containing a Mesecons circuit need remain loaded at all times (rather mapblocks can be loaded on demand as signals are sent), and that the server need not bother running ABMs and ticking entities within those mapblocks that are loaded due to Mesecons signalling.	2016-08-24 00:41:47 -07:00
Christopher Head	53eaf2af11	Remove an obsolete comment.	2016-08-16 00:16:24 -07:00