added first unittests

src/core/pool.rs

@@ -5,12 +5,15 @@ pub struct PoolCfg {
 }
 
 impl PoolCfg {
-    pub fn add_pool(&mut self, num_elems: NumBuckets, elem_size: usize) {
-        self.cfg.push((num_elems, elem_size))
+    pub fn new(cfg: Vec<(NumBuckets, usize)>) -> Self {
+        PoolCfg { cfg }
     }
 
-    fn order(&mut self) -> usize {
-        self.cfg.sort_unstable();
+    pub fn sanitize(&mut self) -> usize {
+        self.cfg
+            .retain(|&(bucket_num, size)| bucket_num > 0 && size < LocalPool::MAX_SIZE);
+        self.cfg
+            .sort_unstable_by(|(_, sz0), (_, sz1)| sz0.partial_cmp(sz1).unwrap());
         self.cfg.len()
     }
 }
@@ -51,7 +54,7 @@ impl LocalPool {
     const MAX_SIZE: PoolSize = Self::STORE_FREE - 1;
 
     pub fn new(mut cfg: PoolCfg) -> LocalPool {
-        let subpools_num = cfg.order();
+        let subpools_num = cfg.sanitize();
         let mut local_pool = LocalPool {
             pool_cfg: cfg,
             pool: Vec::with_capacity(subpools_num),
@@ -186,3 +189,34 @@ impl LocalPool {
         Some(addr.packet_idx as usize * size)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::core::pool::{LocalPool, PoolCfg};
+
+    #[test]
+    fn test_cfg() {
+        // Values where number of buckets is 0 or size is too large should be removed
+        let mut pool_cfg = PoolCfg::new(vec![(0, 0), (1, 0), (2, LocalPool::MAX_SIZE)]);
+        pool_cfg.sanitize();
+        assert_eq!(pool_cfg.cfg, vec![(1, 0)]);
+        // Entries should be ordered according to bucket size
+        pool_cfg = PoolCfg::new(vec![(16, 6), (32, 3), (8, 12)]);
+        pool_cfg.sanitize();
+        assert_eq!(pool_cfg.cfg, vec![(32, 3), (16, 6), (8, 12)]);
+        // Unstable sort is used, so order of entries with same block length should not matter
+        pool_cfg = PoolCfg::new(vec![(12, 12), (14, 16), (10, 12)]);
+        pool_cfg.sanitize();
+        assert!(
+            pool_cfg.cfg == vec![(12, 12), (10, 12), (14, 16)]
+                || pool_cfg.cfg == vec![(10, 12), (12, 12), (14, 16)]
+        );
+    }
+
+    #[test]
+    fn test_basic() {
+        // 4 buckets of 4 bytes, 2 of 8 bytes and 1 of 16 bytes
+        let pool_cfg = PoolCfg::new(vec![(4, 4), (2, 8), (1, 16)]);
+        let _local_pool = LocalPool::new(pool_cfg);
+    }
+}

src/main.rs

@@ -1,3 +1,91 @@
-fn main() {
-    println!("Hello World")
+use std::sync::{Arc, RwLock};
+use std::thread;
+
+struct PoolDummy {
+    test_buf: [u8; 128],
+}
+
+struct PoolAccessDummy<'a> {
+    pool_dummy: &'a mut PoolDummy,
+    no_deletion: bool,
+}
+
+impl PoolAccessDummy<'_> {
+    fn modify(&mut self) -> &mut [u8] {
+        self.pool_dummy.modify()
+    }
+
+    fn release(&mut self) {
+        self.no_deletion = true;
+    }
+}
+
+impl Drop for PoolAccessDummy<'_> {
+    fn drop(&mut self) {
+        if self.no_deletion {
+            println!("Pool access: Drop with no deletion")
+        } else {
+            self.pool_dummy.delete();
+            println!("Pool access: Drop with deletion");
+        }
+    }
+}
+
+impl Default for PoolDummy {
+    fn default() -> Self {
+        PoolDummy { test_buf: [0; 128] }
+    }
+}
+
+impl PoolDummy {
+    fn modify(&mut self) -> &mut [u8] {
+        self.test_buf.as_mut_slice()
+    }
+
+    fn modify_with_accessor(&mut self) -> PoolAccessDummy {
+        PoolAccessDummy {
+            pool_dummy: self,
+            no_deletion: false,
+        }
+    }
+
+    fn read(&self) -> &[u8] {
+        self.test_buf.as_slice()
+    }
+
+    fn delete(&mut self) {
+        println!("Store content was deleted");
+    }
+}
+fn main() {
+    println!("Hello World");
+    let shared_dummy = Arc::new(RwLock::new(PoolDummy::default()));
+    let shared_clone = shared_dummy.clone();
+    let jh0 = thread::spawn(move || loop {
+        {
+            let mut dummy = shared_dummy.write().unwrap();
+            let buf = dummy.modify();
+            buf[0] = 1;
+
+            let mut accessor = dummy.modify_with_accessor();
+            let buf = accessor.modify();
+            buf[0] = 2;
+        }
+    });
+
+    let jh1 = thread::spawn(move || loop {
+        {
+            let dummy = shared_clone.read().unwrap();
+            let buf = dummy.read();
+            println!("Buffer 0: {:?}", buf[0]);
+        }
+
+        let mut dummy = shared_clone.write().unwrap();
+        let mut accessor = dummy.modify_with_accessor();
+        let buf = accessor.modify();
+        buf[0] = 3;
+        accessor.release();
+    });
+    jh0.join().unwrap();
+    jh1.join().unwrap();
 }