fix: remove once_cell dependency and replace with OnceLock

Author: ganeshnj

Cargo.lock

@@ -14,7 +14,6 @@ ddcommon-ffi = { path = "../ddcommon-ffi", default-features = false }
 tracing = { version = "0.1", default-features = false }
 tracing-subscriber = { version = "0.3.18", default-features = false, features = ["json", "env-filter"] }
 tracing-appender = "0.2.3"
-once_cell = "1.8"
 
 [dev-dependencies]
 tempfile = "3.10"

datadog-log/Cargo.toml

@@ -3,11 +3,11 @@
 
 use crate::writers::{FileWriter, NoopWriter, StdoutWriter};
 use ddcommon_ffi::Error;
-use once_cell::sync::Lazy;
 use std::cmp::PartialOrd;
 use std::io;
 use std::io::Write;
 use std::path::Path;
+use std::sync::OnceLock;
 use std::sync::{Arc, Mutex};
 use tracing::Level;
 use tracing_subscriber::filter::LevelFilter;
@@ -219,10 +219,11 @@ impl From<LogEventLevel> for LevelFilter {
     }
 }
 
-static LOGGER: Lazy<Mutex<Option<Logger>>> = Lazy::new(|| Mutex::new(None));
+static LOGGER: OnceLock<Mutex<Option<Logger>>> = OnceLock::new();
 
 pub fn logger_configure(config: LoggerConfig) -> Result<(), Error> {
-    let mut logger_guard = LOGGER
+    let logger_mutex = LOGGER.get_or_init(|| Mutex::new(None));
+    let mut logger_guard = logger_mutex
         .lock()
         .map_err(|e| Error::from(format!("Failed to acquire logger lock: {}", e)))?;
 
@@ -240,7 +241,8 @@ pub fn logger_configure(config: LoggerConfig) -> Result<(), Error> {
 
 pub fn logger_set_log_level(log_level: LogEventLevel) -> Result<(), Error> {
     let level_filter = LevelFilter::from(log_level);
-    let logger = LOGGER
+    let logger_mutex = LOGGER.get_or_init(|| Mutex::new(None));
+    let logger = logger_mutex
         .lock()
         .map_err(|e| Error::from(format!("Failed to acquire logger lock: {}", e)))?;