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# Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed 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.
def generate_files(injection_graph, generate_runtime_bench_code):
file_content_by_name = dict()
for node_id in injection_graph.nodes_iter():
file_content_by_name['component%s.h' % node_id] = _generate_component_header(node_id)
file_content_by_name['component%s.cpp' % node_id] = _generate_component_source(node_id, injection_graph.successors(node_id))
[toplevel_node] = [node_id
for node_id in injection_graph.nodes_iter()
if not injection_graph.predecessors(node_id)]
file_content_by_name['main.cpp'] = _generate_main(toplevel_node, generate_runtime_bench_code)
return file_content_by_name
def _get_component_type(component_index):
return 'fruit::Component<Interface{component_index}>'.format(**locals())
def _generate_component_header(component_index):
component_type = _get_component_type(component_index)
template = """
#ifndef COMPONENT{component_index}_H
#define COMPONENT{component_index}_H
#include <fruit/fruit.h>
// Example include that the code might use
#include <vector>
struct Interface{component_index} {{
virtual ~Interface{component_index}() = default;
}};
{component_type} getComponent{component_index}();
#endif // COMPONENT{component_index}_H
"""
return template.format(**locals())
def _generate_component_source(component_index, deps):
include_directives = ''.join(['#include "component%s.h"\n' % index for index in deps + [component_index]])
fields = ''.join(['Interface%s& x%s;\n' % (dep, dep)
for dep in deps])
component_deps = ', '.join(['Interface%s& x%s' % (dep, dep)
for dep in deps])
param_initializers = ', '.join('x%s(x%s)' % (dep, dep)
for dep in deps)
if param_initializers:
param_initializers = ': ' + param_initializers
install_expressions = ''.join([' .install(getComponent%s)\n' % dep for dep in deps])
component_type = _get_component_type(component_index)
template = """
{include_directives}
namespace {{
struct X{component_index} : public Interface{component_index} {{
{fields}
INJECT(X{component_index}({component_deps})) {param_initializers} {{}}
virtual ~X{component_index}() = default;
}};
}}
"""
template += """
{component_type} getComponent{component_index}() {{
return fruit::createComponent(){install_expressions}
.bind<Interface{component_index}, X{component_index}>();
}}
"""
return template.format(**locals())
def _generate_main(toplevel_component, generate_runtime_bench_code):
if generate_runtime_bench_code:
template = """
#include "component{toplevel_component}.h"
#include <ctime>
#include <iostream>
#include <cstdlib>
#include <iomanip>
#include <chrono>
using namespace std;
fruit::Component<> getEmptyComponent() {{
return fruit::createComponent();
}}
int main(int argc, char* argv[]) {{
if (argc != 2) {{
std::cout << "Need to specify num_loops as argument." << std::endl;
exit(1);
}}
size_t num_loops = std::atoi(argv[1]);
std::chrono::high_resolution_clock::time_point start_time = std::chrono::high_resolution_clock::now();
for (size_t i = 0; i < 1 + num_loops/100; i++) {{
fruit::NormalizedComponent<Interface{toplevel_component}> normalizedComponent(getComponent{toplevel_component});
(void)normalizedComponent;
}}
double componentNormalizationTime = std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::high_resolution_clock::now() - start_time).count();
start_time = std::chrono::high_resolution_clock::now();
for (size_t i = 0; i < 1 + num_loops/100; i++) {{
fruit::Injector<Interface{toplevel_component}> injector(getComponent{toplevel_component});
injector.get<std::shared_ptr<Interface{toplevel_component}>>();
}}
double fullInjectionTime = std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::high_resolution_clock::now() - start_time).count();
fruit::NormalizedComponent<Interface{toplevel_component}> normalizedComponent(getComponent{toplevel_component});
start_time = std::chrono::high_resolution_clock::now();
for (size_t i = 0; i < num_loops; i++) {{
fruit::Injector<Interface{toplevel_component}> injector(normalizedComponent, getEmptyComponent);
injector.get<std::shared_ptr<Interface{toplevel_component}>>();
}}
double perRequestTime = std::chrono::duration_cast<std::chrono::duration<double>>(std::chrono::high_resolution_clock::now() - start_time).count();
std::cout << std::fixed;
std::cout << std::setprecision(15);
std::cout << "componentNormalizationTime = " << componentNormalizationTime * 100 / num_loops << std::endl;
std::cout << "Total for setup = " << componentNormalizationTime * 100 / num_loops << std::endl;
std::cout << "Full injection time = " << fullInjectionTime * 100 / num_loops << std::endl;
std::cout << "Total per request = " << perRequestTime / num_loops << std::endl;
return 0;
}}
"""
else:
template = """
#include "component{toplevel_component}.h"
int main(void) {{
fruit::Injector<Interface{toplevel_component}> injector(getComponent{toplevel_component});
injector.get<std::shared_ptr<Interface{toplevel_component}>>();
return 0;
}}
"""
return template.format(**locals())
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