ai/genetic-bit-string-evolver
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Duplicated EvaluateFitness() to EvaluateError(), reversed

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This commit is contained in:
Mike 2018-04-14 04:18:05 -07:00
parent b256a47cde
commit a233802f6c
2 changed files with 79 additions and 0 deletions
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74
Population.cpp
View File

@ -237,6 +237,45 @@ namespace BitEvolver
}
}
//
void Population::EvaluateError(std::function<double(std::shared_ptr<Chromosome>)> evaluation_callback)
{
//
std::shared_ptr<std::vector<std::shared_ptr<Chromosome>>> _chromosomes_copy;
std::vector<std::shared_ptr<std::thread>> threads;
std::shared_ptr<std::thread> thread;
int
threads_count,
i
;
// Make a new vector containing all current chromosomes
this->population_modification_mutex.lock();
_chromosomes_copy = std::shared_ptr<std::vector<std::shared_ptr<Chromosome>>>(
new std::vector<std::shared_ptr<Chromosome>>()
);
for ( i=0; i<(int)this->chromosomes.size(); i++ ) {
_chromosomes_copy->push_back( this->chromosomes[i] );
}
this->population_modification_mutex.unlock();
// Spawn threads
threads_count = this->GetThreadCountSuggestion();
for ( i=0; i<threads_count; i++) {
//
thread = std::shared_ptr<std::thread>(
new std::thread(&Population::EvaluateError_Thread, this, _chromosomes_copy, evaluation_callback)
);
threads.push_back(thread);
}
// Wait for threads to finish
for ( i=0; i<threads_count; i++ ) {
threads[i]->join();
}
}
//
void Population::Evolve()
{
@ -448,6 +487,41 @@ namespace BitEvolver
}
}
//
void Population::EvaluateError_Thread(
std::shared_ptr<std::vector<std::shared_ptr<Chromosome>>> _chromosomes,
std::function<double(std::shared_ptr<Chromosome>)> evaluation_callback
)
{
//
std::shared_ptr<Chromosome> chromosome;
double error;
//
while (true)
{
// Grab a free chromosome
this->evaluate_fitness_mutex.lock();
chromosome = nullptr;
if ( _chromosomes->size() ) {
chromosome = _chromosomes->at(_chromosomes->size()-1);
_chromosomes->pop_back();
}
this->evaluate_fitness_mutex.unlock();
// Call the evaluation callback
if ( chromosome != nullptr ) {
error = evaluation_callback(chromosome);
chromosome->SetError(error);
}
// We're done if there was nothing to grab
else{
break;
}
}
}
//
std::shared_ptr<Chromosome> Population::BreedChild()
{

5
Population.h
View File

@ -58,6 +58,7 @@ namespace BitEvolver
//
void EvaluateFitness(std::function<double(std::shared_ptr<Chromosome>)> evaluation_callback);
void EvaluateError(std::function<double(std::shared_ptr<Chromosome>)> evaluation_callback);
//
void Evolve();
@ -117,6 +118,10 @@ namespace BitEvolver
std::shared_ptr<std::vector<std::shared_ptr<Chromosome>>> _chromosomes,
std::function<double(std::shared_ptr<Chromosome>)> evaluation_callback
);
void EvaluateError_Thread(
std::shared_ptr<std::vector<std::shared_ptr<Chromosome>>> _chromosomes,
std::function<double(std::shared_ptr<Chromosome>)> evaluation_callback
);
//
std::shared_ptr<Chromosome> BreedChild();