diff options
Diffstat (limited to 'apps/examples/helloxx/main.cxx')
-rw-r--r-- | apps/examples/helloxx/main.cxx | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/apps/examples/helloxx/main.cxx b/apps/examples/helloxx/main.cxx new file mode 100644 index 000000000..8514fead2 --- /dev/null +++ b/apps/examples/helloxx/main.cxx @@ -0,0 +1,178 @@ +//*************************************************************************** +// examples/helloxx/main.cxx +// +// Copyright (C) 2009, 2011-2012 Gregory Nutt. All rights reserved. +// Author: Gregory Nutt <gnutt@nuttx.org> +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions +// are met: +// +// 1. Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// 2. Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in +// the documentation and/or other materials provided with the +// distribution. +// 3. Neither the name NuttX nor the names of its contributors may be +// used to endorse or promote products derived from this software +// without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +// POSSIBILITY OF SUCH DAMAGE. +// +//*************************************************************************** + +//*************************************************************************** +// Included Files +//*************************************************************************** + +#include <nuttx/config.h> + +#include <cstdio> +#include <debug.h> + +#include <nuttx/init.h> +#include <nuttx/arch.h> + +//*************************************************************************** +// Definitions +//*************************************************************************** +// Debug ******************************************************************** +// Non-standard debug that may be enabled just for testing the constructors + +#ifndef CONFIG_DEBUG +# undef CONFIG_DEBUG_CXX +#endif + +#ifdef CONFIG_DEBUG_CXX +# define cxxdbg dbg +# define cxxlldbg lldbg +# ifdef CONFIG_DEBUG_VERBOSE +# define cxxvdbg vdbg +# define cxxllvdbg llvdbg +# else +# define cxxvdbg(x...) +# define cxxllvdbg(x...) +# endif +#else +# define cxxdbg(x...) +# define cxxlldbg(x...) +# define cxxvdbg(x...) +# define cxxllvdbg(x...) +#endif + +//*************************************************************************** +// Private Classes +//*************************************************************************** + +class CHelloWorld +{ + public: + CHelloWorld(void) : mSecret(42) + { + cxxdbg("Constructor: mSecret=%d\n", mSecret); + } + + ~CHelloWorld(void) + { + cxxdbg("Destructor\n"); + } + + bool HelloWorld(void) + { + cxxdbg("HelloWorld: mSecret=%d\n", mSecret); + + if (mSecret != 42) + { + printf("CHelloWorld::HelloWorld: CONSTRUCTION FAILED!\n"); + return false; + } + else + { + printf("CHelloWorld::HelloWorld: Hello, World!!\n"); + return true; + } + } + + private: + int mSecret; +}; + +//*************************************************************************** +// Private Data +//*************************************************************************** + +// Define a statically constructed CHellowWorld instance if C++ static +// initializers are supported by the platform + +#ifdef CONFIG_HAVE_CXXINITIALIZE +static CHelloWorld g_HelloWorld; +#endif + +//*************************************************************************** +// Public Functions +//*************************************************************************** + +//*************************************************************************** +// user_start +//*************************************************************************** + +/**************************************************************************** + * Name: user_start/nxhello_main + ****************************************************************************/ + +#ifdef CONFIG_EXAMPLES_HELLOXX_BUILTIN +extern "C" int helloxx_main(int argc, char *argv[]); +# define MAIN_NAME helloxx_main +# define MAIN_STRING "helloxx_main: " +#else +# define MAIN_NAME user_start +# define MAIN_STRING "user_start: " +#endif + +int MAIN_NAME(int argc, char *argv[]) +{ + // If C++ initialization for static constructors is supported, then do + // that first + +#ifdef CONFIG_HAVE_CXXINITIALIZE + up_cxxinitialize(); +#endif + + // Exercise an explictly instantiated C++ object + + CHelloWorld *pHelloWorld = new CHelloWorld; + printf(MAIN_STRING "Saying hello from the dynamically constructed instance\n"); + pHelloWorld->HelloWorld(); + + // Exercise an C++ object instantiated on the stack + +#ifndef CONFIG_EXAMPLES_HELLOXX_NOSTACKCONST + CHelloWorld HelloWorld; + + printf(MAIN_STRING "Saying hello from the instance constructed on the stack\n"); + HelloWorld.HelloWorld(); +#endif + + // Exercise an statically constructed C++ object + +#ifdef CONFIG_HAVE_CXXINITIALIZE + printf(MAIN_STRING "Saying hello from the statically constructed instance\n"); + g_HelloWorld.HelloWorld(); +#endif + + delete pHelloWorld; + return 0; +} + |