Fix c layer init logging

Author: flyingsilverfin

c/src/error.rs

@@ -21,7 +21,7 @@ use std::{
     cell::RefCell,
     ffi::c_char,
     ptr::{null, null_mut},
-    sync::Arc,
+    sync::{Arc, Once},
 };
 
 use env_logger::Env;
@@ -37,10 +37,14 @@ thread_local! {
 /// Enables logging in the TypeDB driver.
 #[no_mangle]
 pub extern "C" fn init_logging() {
-    const ENV_VAR: &str = "TYPEDB_DRIVER_LOG_LEVEL";
-    if let Err(err) = env_logger::try_init_from_env(Env::new().filter(ENV_VAR)) {
-        warn!("{err}");
-    }
+    static INIT: Once = Once::new();
+    
+    INIT.call_once(|| {
+        const ENV_VAR: &str = "TYPEDB_DRIVER_LOG_LEVEL";
+        if let Err(err) = env_logger::try_init_from_env(Env::new().filter(ENV_VAR)) {
+            warn!("Failed to initialize logging: {}", err);
+        }
+    });
 }
 
 fn ok_record<T>(result: Result<T>) -> Option<T> {