130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
//***************************************************************************
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// apps/examples/helloxx/helloxx_main.cxx
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//
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// Licensed to the Apache Software Foundation (ASF) under one or more
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// contributor license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright ownership. The
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// ASF licenses this file to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance with the
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// License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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//
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//***************************************************************************
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//***************************************************************************
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// Included Files
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//***************************************************************************
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#include <nuttx/config.h>
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#include <cstdio>
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#include <debug.h>
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//***************************************************************************
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// Definitions
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//***************************************************************************
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// Configuration ************************************************************
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// Debug ********************************************************************
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// Non-standard debug that may be enabled just for testing the constructors
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#ifdef CONFIG_DEBUG_FEATURES
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# define CONFIG_DEBUG_CXX
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#endif
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#ifdef CONFIG_DEBUG_CXX
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# define cxxinfo _info
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#else
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# define cxxinfo(x...)
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#endif
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//***************************************************************************
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// Private Classes
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//***************************************************************************
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class CHelloWorld
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{
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public:
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CHelloWorld(void) : mSecret(42)
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{
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cxxinfo("Constructor: mSecret=%d\n", mSecret);
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}
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~CHelloWorld(void)
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{
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cxxinfo("Destructor\n");
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}
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bool HelloWorld(void)
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{
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cxxinfo("HelloWorld: mSecret=%d\n", mSecret);
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if (mSecret != 42)
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{
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printf("CHelloWorld::HelloWorld: CONSTRUCTION FAILED!\n");
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return false;
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}
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else
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{
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printf("CHelloWorld::HelloWorld: Hello, World!!\n");
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return true;
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}
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}
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private:
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int mSecret;
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};
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//***************************************************************************
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// Private Data
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//***************************************************************************
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// Define a statically constructed CHellowWorld instance if C++ static
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// initializers are supported by the platform
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#ifdef CONFIG_HAVE_CXXINITIALIZE
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static CHelloWorld g_HelloWorld;
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#endif
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//***************************************************************************
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// Public Functions
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//***************************************************************************
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/****************************************************************************
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* Name: helloxx_main
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****************************************************************************/
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extern "C" int main(int argc, FAR char *argv[])
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{
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// Exercise an explicitly instantiated C++ object
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CHelloWorld *pHelloWorld = new CHelloWorld;
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printf("helloxx_main: Saying hello from the dynamically constructed instance\n");
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pHelloWorld->HelloWorld();
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// Exercise an C++ object instantiated on the stack
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CHelloWorld HelloWorld;
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printf("helloxx_main: Saying hello from the instance constructed on the stack\n");
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HelloWorld.HelloWorld();
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// Exercise an statically constructed C++ object
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#ifdef CONFIG_HAVE_CXXINITIALIZE
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printf("helloxx_main: Saying hello from the statically constructed instance\n");
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g_HelloWorld.HelloWorld();
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#endif
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delete pHelloWorld;
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return 0;
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}
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