1 files changed, 85 insertions, 0 deletions
diff --git a/include/odp/api/spinlock_recursive.h b/include/odp/api/spinlock_recursive.h
new file mode 100644
index 000000000..d98f2bbb6
--- /dev/null
+++ b/include/odp/api/spinlock_recursive.h
@@ -0,0 +1,85 @@
+/* Copyright (c) 2015, Linaro Limited
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ */
+
+/**
+ * @file
+ *
+ * ODP recursive spinlock
+ */
+
+#ifndef ODP_API_SPINLOCK_RECURSIVE_H_
+#define ODP_API_SPINLOCK_RECURSIVE_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @addtogroup odp_locks
+ * @details
+ * <b> Recursive spin lock (odp_spinlock_recursive_t) </b>
+ *
+ * This is recursive version of the spin lock. A thread can acquire the lock
+ * multiple times without a deadlock. To release the lock, the thread must
+ * unlock it the same number of times.
+ * @{
+ */
+
+/**
+ * @typedef odp_spinlock_recursive_t
+ * Recursive spinlock
+ */
+
+/**
+ * Initialize recursive spinlock.
+ *
+ * @param lock    Pointer to a lock
+ */
+void odp_spinlock_recursive_init(odp_spinlock_recursive_t *lock);
+
+/**
+ * Acquire recursive spinlock.
+ *
+ * @param lock    Pointer to a lock
+ */
+void odp_spinlock_recursive_lock(odp_spinlock_recursive_t *lock);
+
+/**
+ * Try to acquire recursive spinlock.
+ *
+ * @param lock    Pointer to a lock
+ *
+ * @retval 1 lock acquired
+ * @retval 0 lock not acquired
+ */
+int odp_spinlock_recursive_trylock(odp_spinlock_recursive_t *lock);
+
+/**
+ * Release recursive spinlock.
+ *
+ * @param lock    Pointer to a lock
+ */
+void odp_spinlock_recursive_unlock(odp_spinlock_recursive_t *lock);
+
+/**
+ * Check if recursive spinlock is locked.
+ *
+ * @param lock    Pointer to a lock
+ *
+ * @retval 1 lock is locked
+ * @retval 0 lock is not locked
+ */
+int odp_spinlock_recursive_is_locked(odp_spinlock_recursive_t *lock);
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif