Add template and build environment.

1 files changed, 202 insertions, 0 deletions

diff --git a/ext/FunctionPointer.h b/ext/FunctionPointer.h
new file mode 100644
index 0000000..7b6be7a
--- /dev/null
+++ b/ext/FunctionPointer.h
@@ -0,0 +1,202 @@
+/* mbed Microcontroller Library

+ * Copyright (c) 2006-2015 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 MBED_FUNCTIONPOINTER_H

+#define MBED_FUNCTIONPOINTER_H

+

+#include <string.h>

+#include <stdint.h>

+

+namespace mbed {

+

+/* If we had variaditic templates, this wouldn't be a problem, but until C++11 is enabled, we are stuck with multiple classes... */

+

+/** A class for storing and calling a pointer to a static or member function

+ */

+template <typename R, typename A1>

+class FunctionPointerArg1{

+public:

+    /** Create a FunctionPointer, attaching a static function

+     *

+     *  @param function The static function to attach (default is none)

+     */

+    FunctionPointerArg1(R (*function)(A1) = 0) {

+        attach(function);

+    }

+

+    /** Create a FunctionPointer, attaching a member function

+     *

+     *  @param object The object pointer to invoke the member function on (i.e. the this pointer)

+     *  @param function The address of the member function to attach

+     */

+    template<typename T>

+    FunctionPointerArg1(T *object, R (T::*member)(A1)) {

+        attach(object, member);

+    }

+

+    /** Attach a static function

+     *

+     *  @param function The static function to attach (default is none)

+     */

+    void attach(R (*function)(A1)) {

+        _p.function = function;

+        _membercaller = 0;

+    }

+

+    /** Attach a member function

+     *

+     *  @param object The object pointer to invoke the member function on (i.e. the this pointer)

+     *  @param function The address of the member function to attach

+     */

+    template<typename T>

+    void attach(T *object, R (T::*member)(A1)) {

+        _p.object = static_cast<void*>(object);

+        *reinterpret_cast<R (T::**)(A1)>(_member) = member;

+        _membercaller = &FunctionPointerArg1::membercaller<T>;

+    }

+

+    /** Call the attached static or member function

+     */

+    R call(A1 a) {

+        if (_membercaller == 0 && _p.function) {

+           return _p.function(a);

+        } else if (_membercaller && _p.object) {

+           return _membercaller(_p.object, _member, a);

+        }

+        return (R)0;

+    }

+

+    /** Get registered static function

+     */

+    R(*get_function(A1))() {

+        return _membercaller ? (R(*)(A1))0 : (R(*)(A1))_p.function;

+    }

+

+#ifdef MBED_OPERATORS

+    R operator ()(A1 a) {

+        return call(a);

+    }

+    operator bool(void) const {

+        return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;

+    }

+#endif

+private:

+    template<typename T>

+    static R membercaller(void *object, uintptr_t *member, A1 a) {

+        T* o = static_cast<T*>(object);

+        R (T::**m)(A1) = reinterpret_cast<R (T::**)(A1)>(member);

+        return (o->**m)(a);

+    }

+

+    union {

+        R (*function)(A1); // static function pointer

+        void *object;      // object this pointer

+    } _p;

+    uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller

+    R (*_membercaller)(void*, uintptr_t*, A1); // registered membercaller function to convert back and call _m.member on _object

+};

+

+/** A class for storing and calling a pointer to a static or member function (R ()(void))

+ */

+template <typename R>

+class FunctionPointerArg1<R, void>{

+public:

+    /** Create a FunctionPointer, attaching a static function

+     *

+     *  @param function The static function to attach (default is none)

+     */

+    FunctionPointerArg1(R (*function)(void) = 0) {

+        attach(function);

+    }

+

+    /** Create a FunctionPointer, attaching a member function

+     *

+     *  @param object The object pointer to invoke the member function on (i.e. the this pointer)

+     *  @param function The address of the void member function to attach

+     */

+    template<typename T>

+    FunctionPointerArg1(T *object, R (T::*member)(void)) {

+        attach(object, member);

+    }

+

+    /** Attach a static function

+     *

+     *  @param function The void static function to attach (default is none)

+     */

+    void attach(R (*function)(void)) {

+        _p.function = function;

+        _membercaller = 0;

+    }

+

+    /** Attach a member function

+     *

+     *  @param object The object pointer to invoke the member function on (i.e. the this pointer)

+     *  @param function The address of the void member function to attach

+     */

+    template<typename T>

+    void attach(T *object, R (T::*member)(void)) {

+        _p.object = static_cast<void*>(object);

+        *reinterpret_cast<R (T::**)(void)>(_member) = member;

+        _membercaller = &FunctionPointerArg1::membercaller<T>;

+    }

+

+    /** Call the attached static or member function

+     */

+    R call(){

+        if (_membercaller == 0 && _p.function) {

+            return _p.function();

+        } else if (_membercaller && _p.object) {

+            return _membercaller(_p.object, _member);

+        }

+        return (R)0;

+    }

+

+    /** Get registered static function

+     */

+    R(*get_function())() {

+        return _membercaller ? (R(*)())0 : (R(*)())_p.function;

+    }

+

+#ifdef MBED_OPERATORS

+    R operator ()(void) {

+        return call();

+    }

+    operator bool(void) const {

+        return (_membercaller != NULL ? _p.object : (void*)_p.function) != NULL;

+    }

+#endif

+

+private:

+    template<typename T>

+    static R membercaller(void *object, uintptr_t *member) {

+        T* o = static_cast<T*>(object);

+        R (T::**m)(void) = reinterpret_cast<R (T::**)(void)>(member);

+        return (o->**m)();

+    }

+

+    union {

+        R (*function)(void); // static function pointer

+        void *object;        // object this pointer

+    } _p;

+    uintptr_t _member[4]; // aligned raw member function pointer storage - converted back by registered _membercaller

+    R (*_membercaller)(void*, uintptr_t*); // registered membercaller function to convert back and call _m.member on _object

+};

+

+typedef FunctionPointerArg1<void, void> FunctionPointer;

+typedef FunctionPointerArg1<void, int> event_callback_t;

+

+} // namespace mbed

+

+#endif