Merge pull request #3111 from BernardXiong/spin_lock

Add spin lock API in Kernel

1 files changed, 21 insertions, 0 deletions

diff --git a/include/rtthread.h b/include/rtthread.h
index d703f36268..13a1a4424b 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -391,6 +391,27 @@ rt_err_t rt_mq_recv(rt_mq_t    mq,
 rt_err_t rt_mq_control(rt_mq_t mq, int cmd, void *arg);
 #endif
 
+/*
+ * spinlock
+ */
+#ifdef RT_USING_SMP
+struct rt_spinlock;
+
+void rt_spin_lock_init(struct rt_spinlock *lock);
+void rt_spin_lock(struct rt_spinlock *lock);
+void rt_spin_unlock(struct rt_spinlock *lock);
+rt_base_t rt_spin_lock_irqsave(struct rt_spinlock *lock);
+void rt_spin_unlock_irqrestore(struct rt_spinlock *lock, rt_base_t level);
+
+#else
+#define rt_spin_lock_init(lock)                 /* nothing */
+#define rt_spin_lock(lock)                      rt_enter_critical()
+#define rt_spin_unlock(lock)                    rt_exit_critical()
+#define rt_spin_lock_irqsave(lock)              rt_hw_interrupt_disable()
+#define rt_spin_unlock_irqrestore(lock, level)  rt_hw_interrupt_enable(level)
+
+#endif
+
 /**@}*/
 
 #ifdef RT_USING_DEVICE