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Implement minetest.ipc_cas()

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sfan5 2024-05-23 15:44:16 +02:00
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doc/lua_api.md
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@ -7066,6 +7066,18 @@ minetest.ipc_get("test:foo").subkey = "value" -- WRONG!
minetest.ipc_get("test:foo") -- returns an empty table
```
**Advanced**:
* `minetest.ipc_cas(key, old_value, new_value)`:
* Write a value to the shared data area, but only if the previous value
equals what was given.
This operation is called Compare-and-Swap and can be used to implement
synchronization between threads.
* `key`: as above
* `old_value`: value compared to using `==` (`nil` compares equal for non-existing keys)
* `new_value`: value that will be set
* returns: true on success, false otherwise
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