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Embedded Template Library (ETL) Example application

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Peter van der Perk 2022-08-04 23:08:38 +02:00 committed by Xiang Xiao
parent 30805a7001
commit 9179783906
4 changed files with 213 additions and 0 deletions
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12
examples/etl/Kconfig Normal file
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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
config EXAMPLES_ETL
tristate "Embedded Template Library (ETL) C++ example"
default n
depends on HAVE_CXX && ETL
---help---
Enable the ETL C++ example which showcases the etl::vector container
and C++11 iterator

23
examples/etl/Make.defs Normal file
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############################################################################
# apps/examples/helloxx/Make.defs
#
# 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.
#
############################################################################
ifneq ($(CONFIG_EXAMPLES_ETL),)
CONFIGURED_APPS += $(APPDIR)/examples/etl
endif

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examples/etl/Makefile Normal file
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############################################################################
# apps/examples/etl/Makefile
#
# 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.
#
############################################################################
include $(APPDIR)/Make.defs
# ETL C++ Example
MAINSRC = etl_main.cxx
# etl built-in application info
PROGNAME = etl
PRIORITY = SCHED_PRIORITY_DEFAULT
STACKSIZE = $(CONFIG_DEFAULT_TASK_STACKSIZE)
MODULE = $(CONFIG_EXAMPLES_HELLOXX)
include $(APPDIR)/Application.mk

144
examples/etl/etl_main.cxx Normal file
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//***************************************************************************
// 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;
}