glop_proto_solver.h

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// Copyright 2010-2024 Google LLC
// 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.
 
#ifndef OR_TOOLS_LINEAR_SOLVER_PROTO_SOLVER_GLOP_PROTO_SOLVER_H_
#define OR_TOOLS_LINEAR_SOLVER_PROTO_SOLVER_GLOP_PROTO_SOLVER_H_
 
#include <atomic>
#include <functional>
#include <string>
 
#include "ortools/glop/parameters.pb.h"
#include "ortools/linear_solver/linear_solver.pb.h"
#include "ortools/util/lazy_mutable_copy.h"
 
namespace operations_research {
 
// Solve the input LP model with the GLOP solver.
//
// If possible, std::move the request into this function call to avoid a copy.
//
// If you need to change the solver parameters, please use the
// EncodeParametersAsString() function to set the solver_specific_parameters
// field.
//
// The optional interrupt_solve can be used to interrupt the solve early. It
// must only be set to true, never reset to false. It is also used internally by
// the solver that will set it to true for its own internal logic. As a
// consequence the caller should ignore the stored value and should not use the
// same atomic for different concurrent calls.
//
// The optional logging_callback will be called when the GLOP parameter
// log_search_progress is set to true. Passing a callback will disable the
// default logging to INFO. Note though that by default the GLOP parameter
// log_to_stdout is true so even with a callback, the logs will appear on stdout
// too unless log_to_stdout is set to false. The enable_internal_solver_output
// in the request will act as the GLOP parameter log_search_progress.
MPSolutionResponse GlopSolveProto(
    LazyMutableCopy<MPModelRequest> request,
    std::atomic<bool>* interrupt_solve = nullptr,
    std::function<void(const std::string&)> logging_callback = nullptr);
 
// Returns a string that describes the version of the GLOP solver.
std::string GlopSolverVersion();
 
}  // namespace operations_research
 
#endif  // OR_TOOLS_LINEAR_SOLVER_PROTO_SOLVER_GLOP_PROTO_SOLVER_H_