Start work on Cross-FFI functions

unshell-logger/Cargo.lock

@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "log"
+version = "0.4.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
+
+[[package]]
+name = "unshell-logger"
+version = "0.1.0"
+dependencies = [
+ "log",
+]

unshell-logger/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "unshell-logger"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+log = "0.4.28"

unshell-logger/src/lib.rs

@@ -0,0 +1,14 @@
+use log::{LevelFilter, Log, SetLoggerError};
+
+#[allow(dead_code)]
+pub type SetupLogger =
+    extern "C" fn(logger: &'static dyn Log, level: LevelFilter) -> Result<(), SetLoggerError>;
+
+#[unsafe(no_mangle)]
+pub extern "C" fn setup_logger(
+    logger: &'static dyn log::Log,
+    level: log::LevelFilter,
+) -> Result<(), log::SetLoggerError> {
+    log::set_max_level(level);
+    log::set_logger(logger)
+}