Diff: CThunkIRQ.h

Revision:

9:d3b51b06ac54

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CThunkIRQ.h	Thu Aug 21 17:09:11 2014 +0000
@@ -0,0 +1,93 @@
+/* General C++ Object Thunking class
+ *
+ * - allows direct callbacks to non-static C++ class functions
+ * - keeps track for the corresponding class instance
+ * - supports an optional context parameter for the called function
+ * - ideally suited for class object receiving interrupts (NVIC_SetVector)
+ *
+ * Copyright (c) 2014 ARM Limited
+ *
+ * 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.
+ */
+ 
+#ifndef __CTHUNKIRQ_H__
+#define __CTHUNKIRQ_H__
+
+#include "CThunk.h"
+
+template<class T>
+class CThunkIRQ: CThunk<T> {
+
+public:
+    typedef void (T::*CCallbackSimple)(void);
+    typedef void (T::*CCallback)(void* context);
+
+    inline CThunkIRQ(T *instance, IRQn_Type IRQn)
+        :CThunk<T>(instance)
+    {
+        register_irq(IRQn);
+    }
+
+    inline CThunkIRQ(T *instance, IRQn_Type IRQn, CCallback callback)
+        :CThunk<T>(instance, callback)
+    {
+        register_irq(IRQn);
+    }
+
+    inline CThunkIRQ(T *instance, IRQn_Type IRQn, CCallbackSimple callback)
+        :CThunk<T>(instance, callback)
+    {
+        register_irq(IRQn);
+    }
+
+    inline CThunkIRQ(T &instance, IRQn_Type IRQn, CCallback callback)
+        :CThunk<T>(instance, callback)
+    {
+        register_irq(IRQn);
+    }
+
+    inline CThunkIRQ(T &instance, IRQn_Type IRQn, CCallbackSimple callback)
+        :CThunk<T>(instance, callback)
+    {
+        register_irq(IRQn);
+    }
+
+    inline CThunkIRQ(T &instance, IRQn_Type IRQn, CCallback callback, void* context)
+        :CThunk<T>(instance, callback, context)
+    {
+        register_irq(IRQn);
+    }
+
+    inline ~CThunkIRQ(void)
+    {
+        NVIC_DisableIRQ(m_irqn);
+        NVIC_SetVector(m_irqn, m_prev_handler);        
+    }
+
+private:
+    IRQn_Type m_irqn;
+    uint32_t m_prev_handler;
+    inline void register_irq(IRQn_Type IRQn)
+    {
+        /* remember IRQn for destructor */
+        m_irqn = IRQn;
+
+        /* update IRQ handler atomically */
+        NVIC_DisableIRQ(IRQn);
+        m_prev_handler = NVIC_GetVector(IRQn);
+        NVIC_SetVector(IRQn, CThunk<T>::entry());
+        NVIC_EnableIRQ(IRQn);
+    }
+};
+
+#endif/*__CTHUNKIRQ_H__*/