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mirror of https://github.com/SquidDev-CC/CC-Tweaked synced 2024-12-15 12:40:30 +00:00
CC-Tweaked/projects/core-api
Jonathan Coates 8fe509ecb1
Properly scope IArguments to the current function call
This is a horrible commit: It's a breaking change in a pretty subtle
way, which means it won't be visible while updating. Fortunately I think
the only mod on 1.19.4 is Plethora, but other mods (Mek, Advanced
Peripherals) may be impacted when they update. Sorry!

For some motivation behind the original issue:

The default IArguments implementation (VarargArguments) lazily converts
Lua arguments to Java ones. This is mostly important when passing tables
to Java functions, as we can avoid the conversion entirely if the
function uses IArguments.getTableUnsafe.

However, this lazy conversion breaks down if IArguments is accessed on a
separate thread, as Lua values are not thread-safe. Thus we need to
perform this conversion before the cross-thread sharing occurs.

Now, ideally this would be an implementation detail and entirely
invisible to the user. One approach here would be to only perform this
lazy conversion for methods annotated with @LuaFunction(unsafe=true),
and have it be eager otherwise.

However, the peripheral API gets in the way here, as it means we can no
longer inspect the "actual" method being invoked. And so, alas, this
must leak into the public API.

TLDR: If you're getting weird errors about scope, add an
IArguments.escapes() call before sharing the arguments between threads.

Closes #1384
2023-04-01 11:09:03 +01:00
..
src/main/java/dan200/computercraft/api Properly scope IArguments to the current function call 2023-04-01 11:09:03 +01:00
build.gradle.kts License CC:T according to the REUSE specification (#1351) 2023-03-15 21:52:13 +00:00