Template Class ReentrantSpinLock¶

Defined in File reentrant_spin_lock.h

Class Documentation¶

template<typename T = uint32_t> class ReentrantSpinLock¶

Reentrant spin lock allowing the same thread to lock multiple times.

Unlike SpinLock, the same thread can acquire the lock multiple times without deadlocking. Each lock() must be matched with an unlock(). Maintains a reference count per thread.

Use when: Recursive calls may re-acquire the same lock (call chains, nested operations) Use SpinLock when: No recursion needed (simpler, slightly faster)

Example (Recursive tree traversal):

ReentrantSpinLock tree_lock;
void process_node(Node* node) {
    std::lock_guard lock(tree_lock);  // Safe even if already locked
    process(node);
    if (node->left) process_node(node->left);   // Recursive call re-locks
    if (node->right) process_node(node->right);
}