Fix lock (#510)

* Refactor: reimplement lock

Signed-off-by: junxiang Mu <1948535941@qq.com>

* Fix: fix test case failed

Signed-off-by: junxiang Mu <1948535941@qq.com>

* Improve: lock pref

Signed-off-by: junxiang Mu <1948535941@qq.com>

* fix(lock): Fix resource cleanup issue when batch lock acquisition fails
Ensure that the locks already acquired are properly released when batch lock acquisition fails to avoid memory leaks
Improve the lock protection mechanism to prevent double release issues
Add complete Apache license declarations to all files

Signed-off-by: junxiang Mu <1948535941@qq.com>

---------

Signed-off-by: junxiang Mu <1948535941@qq.com>

crates/lock/src/fast_lock/optimized_notify.rs

@@ -0,0 +1,134 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use once_cell::sync::Lazy;
+use std::sync::Arc;
+use std::sync::atomic::{AtomicU32, AtomicUsize, Ordering};
+use tokio::sync::Notify;
+
+/// Optimized notification pool to reduce memory overhead and thundering herd effects
+static NOTIFY_POOL: Lazy<Vec<Arc<Notify>>> = Lazy::new(|| (0..64).map(|_| Arc::new(Notify::new())).collect());
+
+/// Optimized notification system for object locks
+#[derive(Debug)]
+pub struct OptimizedNotify {
+    /// Number of readers waiting
+    pub reader_waiters: AtomicU32,
+    /// Number of writers waiting
+    pub writer_waiters: AtomicU32,
+    /// Index into the global notify pool
+    pub notify_pool_index: AtomicUsize,
+}
+
+impl OptimizedNotify {
+    pub fn new() -> Self {
+        // Use random pool index to distribute load
+        use std::time::{SystemTime, UNIX_EPOCH};
+        let seed = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .map(|d| d.as_nanos() as u64)
+            .unwrap_or(0);
+        let pool_index = (seed as usize) % NOTIFY_POOL.len();
+
+        Self {
+            reader_waiters: AtomicU32::new(0),
+            writer_waiters: AtomicU32::new(0),
+            notify_pool_index: AtomicUsize::new(pool_index),
+        }
+    }
+
+    /// Notify waiting readers
+    pub fn notify_readers(&self) {
+        if self.reader_waiters.load(Ordering::Acquire) > 0 {
+            let pool_index = self.notify_pool_index.load(Ordering::Relaxed) % NOTIFY_POOL.len();
+            NOTIFY_POOL[pool_index].notify_waiters();
+        }
+    }
+
+    /// Notify one waiting writer
+    pub fn notify_writer(&self) {
+        if self.writer_waiters.load(Ordering::Acquire) > 0 {
+            let pool_index = self.notify_pool_index.load(Ordering::Relaxed) % NOTIFY_POOL.len();
+            NOTIFY_POOL[pool_index].notify_one();
+        }
+    }
+
+    /// Wait for reader notification
+    pub async fn wait_for_read(&self) {
+        self.reader_waiters.fetch_add(1, Ordering::AcqRel);
+        let pool_index = self.notify_pool_index.load(Ordering::Relaxed) % NOTIFY_POOL.len();
+        NOTIFY_POOL[pool_index].notified().await;
+        self.reader_waiters.fetch_sub(1, Ordering::AcqRel);
+    }
+
+    /// Wait for writer notification
+    pub async fn wait_for_write(&self) {
+        self.writer_waiters.fetch_add(1, Ordering::AcqRel);
+        let pool_index = self.notify_pool_index.load(Ordering::Relaxed) % NOTIFY_POOL.len();
+        NOTIFY_POOL[pool_index].notified().await;
+        self.writer_waiters.fetch_sub(1, Ordering::AcqRel);
+    }
+
+    /// Check if anyone is waiting
+    pub fn has_waiters(&self) -> bool {
+        self.reader_waiters.load(Ordering::Acquire) > 0 || self.writer_waiters.load(Ordering::Acquire) > 0
+    }
+}
+
+impl Default for OptimizedNotify {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tokio::time::{Duration, timeout};
+
+    #[tokio::test]
+    async fn test_optimized_notify() {
+        let notify = OptimizedNotify::new();
+
+        // Test that notification works
+        let notify_clone = Arc::new(notify);
+        let notify_for_task = notify_clone.clone();
+
+        let handle = tokio::spawn(async move {
+            notify_for_task.wait_for_read().await;
+        });
+
+        // Give some time for the task to start waiting
+        tokio::time::sleep(Duration::from_millis(10)).await;
+        notify_clone.notify_readers();
+
+        // Should complete quickly
+        assert!(timeout(Duration::from_millis(100), handle).await.is_ok());
+    }
+
+    #[tokio::test]
+    async fn test_writer_notification() {
+        let notify = Arc::new(OptimizedNotify::new());
+        let notify_for_task = notify.clone();
+
+        let handle = tokio::spawn(async move {
+            notify_for_task.wait_for_write().await;
+        });
+
+        tokio::time::sleep(Duration::from_millis(10)).await;
+        notify.notify_writer();
+
+        assert!(timeout(Duration::from_millis(100), handle).await.is_ok());
+    }
+}