diff options
author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-10-29 19:32:05 +0000 |
---|---|---|
committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-10-29 19:32:05 +0000 |
commit | 9e45144d3ad1420908cfdf84306c76f637829023 (patch) | |
tree | 63a4ac04f182a282aac2d649973c99285b12cad5 /apps/examples/elf/tests/helloxx/hello++3.cpp | |
parent | ade5fb42679b7e890f29487ca850c65f9944fa1e (diff) | |
download | nuttx-9e45144d3ad1420908cfdf84306c76f637829023.tar.gz nuttx-9e45144d3ad1420908cfdf84306c76f637829023.tar.bz2 nuttx-9e45144d3ad1420908cfdf84306c76f637829023.zip |
C++ constructors work with ELF load now
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5273 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'apps/examples/elf/tests/helloxx/hello++3.cpp')
-rw-r--r-- | apps/examples/elf/tests/helloxx/hello++3.cpp | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/apps/examples/elf/tests/helloxx/hello++3.cpp b/apps/examples/elf/tests/helloxx/hello++3.cpp new file mode 100644 index 000000000..6661a3fd1 --- /dev/null +++ b/apps/examples/elf/tests/helloxx/hello++3.cpp @@ -0,0 +1,132 @@ +///////////////////////////////////////////////////////////////////////////// +// examples/elf/tests/helloxx/hello++3.c +// +// Copyright (C) 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. +// +///////////////////////////////////////////////////////////////////////////// +// +// This is an another trivial version of "Hello, World" design. It illustrates +// +// - Building a C++ program to use the C library and stdio +// - Basic class creation with virtual methods. +// - Static constructor and destructors (in main program only) +// - NO Streams +// +///////////////////////////////////////////////////////////////////////////// + +///////////////////////////////////////////////////////////////////////////// +// Included Files +///////////////////////////////////////////////////////////////////////////// + +#include <cstdio> + +///////////////////////////////////////////////////////////////////////////// +// Classes +///////////////////////////////////////////////////////////////////////////// + +class CThingSayer +{ + const char *szWhatToSay; +public: + CThingSayer(void); + virtual ~CThingSayer(void); + virtual void Initialize(const char *czSayThis); + virtual void SayThing(void); +}; + +// A static instance of the CThingSayer class. This instance MUST +// be constructed by the system BEFORE the program is started at +// main() and must be destructed by the system AFTER the main() +// returns to the system + +static CThingSayer MyThingSayer; + +// These are implementations of the methods of the CThingSayer class + +CThingSayer::CThingSayer(void) +{ + printf("CThingSayer::CThingSayer: I am!\n"); + szWhatToSay = (const char*)NULL; +} + +CThingSayer::~CThingSayer(void) +{ + printf("CThingSayer::~CThingSayer: I cease to be\n"); + if (szWhatToSay) + { + printf("CThingSayer::~CThingSayer: I will never say '%s' again\n", + szWhatToSay); + } + szWhatToSay = (const char*)NULL; +} + +void CThingSayer::Initialize(const char *czSayThis) +{ + printf("CThingSayer::Initialize: When told, I will say '%s'\n", + czSayThis); + szWhatToSay = czSayThis; +} + +void CThingSayer::SayThing(void) +{ + printf("CThingSayer::SayThing: I am now saying '%s'\n", szWhatToSay); +} + +///////////////////////////////////////////////////////////////////////////// +// Public Functions +///////////////////////////////////////////////////////////////////////////// + +int main(int argc, char **argv) +{ + // We should see the message from constructor, CThingSayer::CThingSayer(), + // BEFORE we see the following messages. That is proof that the + // C++ static initializer is working + + printf("main: Started. MyThingSayer should already exist\n"); + + // Tell MyThingSayer that "Hello, World!" is the string to be said + + printf("main: Calling MyThingSayer.Initialize\n");; + MyThingSayer.Initialize("Hello, World!"); + + // Tell MyThingSayer to say the thing we told it to say + + printf("main: Calling MyThingSayer.SayThing\n");; + MyThingSayer.SayThing(); + + // We are finished, return. We should see the message from the + // destructor, CThingSayer::~CThingSayer(), AFTER we see the following + // message. That is proof that the C++ static destructor logic + // is working + + printf("main: Returning. MyThingSayer should be destroyed\n");; + return 0; +} |