nuttx-apps/examples/etl/etl_main.cxx
2022-08-05 13:56:36 +08:00

145 lines
4.2 KiB
C++

//***************************************************************************
// apps/examples/etl/etl_main.cxx
//
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership. The
// ASF licenses this file to you 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.
//
//***************************************************************************
//***************************************************************************
// Included Files
//***************************************************************************
#include <nuttx/config.h>
#include <cstdio>
#include <debug.h>
#include <etl/vector.h>
#include <etl/numeric.h>
//***************************************************************************
// Definitions
//***************************************************************************
// Configuration ************************************************************
// Debug ********************************************************************
// Non-standard debug that may be enabled just for testing the constructors
#ifndef CONFIG_DEBUG_FEATURES
# undef CONFIG_DEBUG_CXX
#endif
#ifdef CONFIG_DEBUG_CXX
# define cxxinfo _info
#else
# define cxxinfo(x...)
#endif
typedef etl::vector<int, 10> Data;
//***************************************************************************
// Private Classes
//***************************************************************************
class CETL
{
public:
CETL(void) : mSecret(42)
{
cxxinfo("Constructor: mSecret=%d\n", mSecret);
}
~CETL(void)
{
cxxinfo("Destructor\n");
}
bool HelloWorld(void)
{
cxxinfo("HelloWorld: mSecret=%d\n", mSecret);
// Declare the vector instances.
etl::vector<int, 10> v1(10);
etl::vector<int, 20> v2(20);
etl::iota(v1.begin(), v1.end(), 0); // Fill with 0 through 9
etl::iota(v2.begin(), v2.end(), 10); // Fill with 10 through 29
printf("v1 with 0 through 9\n");
for (auto& it : v1) {
printf("%i ", it);
}
printf("\n");
printf("v2 with 10 through 29\n");
for (auto& it : v2) {
printf("%i ", it);
}
printf("\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 CETL g_HelloWorld;
#endif
//***************************************************************************
// Public Functions
//***************************************************************************
/****************************************************************************
* Name: etl_main
****************************************************************************/
extern "C" int main(int argc, FAR char *argv[])
{
// Exercise an explicitly instantiated C++ object
CETL *pHelloWorld = new CETL;
printf("etl_main: Testing ETL from the dynamically constructed instance\n");
pHelloWorld->HelloWorld();
// Exercise an C++ object instantiated on the stack
CETL HelloWorld;
printf("etl_main: Testing ETL from the instance constructed on the stack\n");
HelloWorld.HelloWorld();
// Exercise an statically constructed C++ object
#ifdef CONFIG_HAVE_CXXINITIALIZE
printf("etl_main: Testing ETL from the statically constructed instance\n");
g_HelloWorld.HelloWorld();
#endif
delete pHelloWorld;
return 0;
}