move lazy_static to once_cell (#416)

Author: attila-lin

Cargo.toml

@@ -61,7 +61,7 @@ serde_json = { version = "1.0", features = ["preserve_order"] }
 indexmap = "1.6.2"
 hex = "0.4.2"
 base64 = "0.13.0"
-lazy_static = "1.4.0"
+once_cell = "1.5.1"
 uuid-0_8 = { package = "uuid", version = "0.8.1", features = ["serde", "v4"], optional = true }
 uuid = { version = "1.1.2", features = ["serde", "v4"] }
 serde_bytes = "0.11.5"

src/oid.rs

@@ -13,10 +13,9 @@ use std::{
 use std::{convert::TryInto, time::SystemTime};
 
 use hex::{self, FromHexError};
+use once_cell::sync::Lazy;
 use rand::{thread_rng, Rng};
 
-use lazy_static::lazy_static;
-
 const TIMESTAMP_SIZE: usize = 4;
 const PROCESS_ID_SIZE: usize = 5;
 const COUNTER_SIZE: usize = 3;
@@ -27,9 +26,8 @@ const COUNTER_OFFSET: usize = PROCESS_ID_OFFSET + PROCESS_ID_SIZE;
 
 const MAX_U24: usize = 0xFF_FFFF;
 
-lazy_static! {
-    static ref OID_COUNTER: AtomicUsize = AtomicUsize::new(thread_rng().gen_range(0..=MAX_U24));
-}
+static OID_COUNTER: Lazy<AtomicUsize> =
+    Lazy::new(|| AtomicUsize::new(thread_rng().gen_range(0..=MAX_U24)));
 
 /// Errors that can occur during [`ObjectId`] construction and generation.
 #[derive(Clone, Debug)]
@@ -255,9 +253,7 @@ impl ObjectId {
 
     /// Generate a random 5-byte array.
     fn gen_process_id() -> [u8; 5] {
-        lazy_static! {
-            static ref BUF: [u8; 5] = thread_rng().gen();
-        }
+        static BUF: Lazy<[u8; 5]> = Lazy::new(|| thread_rng().gen());
 
         *BUF
     }

src/tests/mod.rs

@@ -4,9 +4,7 @@ mod modules;
 mod serde;
 mod spec;
 
-use lazy_static::lazy_static;
 use modules::TestLock;
+use once_cell::sync::Lazy;
 
-lazy_static! {
-    pub(crate) static ref LOCK: TestLock = TestLock::new();
-}
+pub(crate) static LOCK: Lazy<TestLock> = Lazy::new(TestLock::new);