blt-gp/src/program.cpp

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/*
* <Short Description>
* Copyright (C) 2024 Brett Terpstra
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <blt/gp/program.h>
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#include <iostream>
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namespace blt::gp
{
// default static references for mutation, crossover, and initializer
// this is largely to not break the tests :3
// it's also to allow for quick setup of a gp program if you don't care how crossover or mutation is handled
static mutation_t s_mutator;
static crossover_t s_crossover;
static ramped_half_initializer_t s_init;
prog_config_t::prog_config_t(): mutator(s_mutator), crossover(s_crossover), pop_initializer(s_init)
{
}
prog_config_t::prog_config_t(const std::reference_wrapper<population_initializer_t>& popInitializer):
mutator(s_mutator), crossover(s_crossover), pop_initializer(popInitializer)
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{}
prog_config_t::prog_config_t(size_t populationSize, const std::reference_wrapper<population_initializer_t>& popInitializer):
population_size(populationSize), mutator(s_mutator), crossover(s_crossover), pop_initializer(popInitializer)
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{}
prog_config_t::prog_config_t(size_t populationSize):
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population_size(populationSize), mutator(s_mutator), crossover(s_crossover), pop_initializer(s_init)
{}
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random_t& gp_program::get_random() const
{
thread_local static blt::gp::random_t random_engine{seed};
return random_engine;
}
void gp_program::create_threads()
{
if (config.threads == 0)
config.set_thread_count(std::thread::hardware_concurrency());
// main thread is thread0
for (blt::size_t i = 1; i < config.threads; i++)
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{
thread_helper.threads.emplace_back(new std::thread([this]() {
while (!should_thread_terminate())
{
if (thread_execution_service != nullptr)
(*thread_execution_service)();
std::this_thread::sleep_for(std::chrono::milliseconds(1));
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}
}));
}
}
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}