stream.hpp

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#ifndef GKO_CORE_LOG_STREAM_HPP_
#define GKO_CORE_LOG_STREAM_HPP_


#include <ginkgo/core/log/logger.hpp>


#include <fstream>
#include <iostream>


namespace gko {
namespace log {


template <typename ValueType = default_precision>
class Stream : public Logger {
public:
    /* Executor events */
    void on_allocation_started(const Executor *exec,
                               const size_type &num_bytes) const override;

    void on_allocation_completed(const Executor *exec,
                                 const size_type &num_bytes,
                                 const uintptr &location) const override;

    void on_free_started(const Executor *exec,
                         const uintptr &location) const override;

    void on_free_completed(const Executor *exec,
                           const uintptr &location) const override;

    void on_copy_started(const Executor *from, const Executor *to,
                         const uintptr &location_from,
                         const uintptr &location_to,
                         const size_type &num_bytes) const override;

    void on_copy_completed(const Executor *from, const Executor *to,
                           const uintptr &location_from,
                           const uintptr &location_to,
                           const size_type &num_bytes) const override;

    /* Operation events */
    void on_operation_launched(const Executor *exec,
                               const Operation *operation) const override;

    void on_operation_completed(const Executor *exec,
                                const Operation *operation) const override;

    /* PolymorphicObject events */
    void on_polymorphic_object_create_started(
        const Executor *, const PolymorphicObject *po) const override;

    void on_polymorphic_object_create_completed(
        const Executor *exec, const PolymorphicObject *input,
        const PolymorphicObject *output) const override;

    void on_polymorphic_object_copy_started(
        const Executor *exec, const PolymorphicObject *from,
        const PolymorphicObject *to) const override;

    void on_polymorphic_object_copy_completed(
        const Executor *exec, const PolymorphicObject *from,
        const PolymorphicObject *to) const override;

    void on_polymorphic_object_deleted(
        const Executor *exec, const PolymorphicObject *po) const override;

    /* LinOp events */
    void on_linop_apply_started(const LinOp *A, const LinOp *b,
                                const LinOp *x) const override;

    void on_linop_apply_completed(const LinOp *A, const LinOp *b,
                                  const LinOp *x) const override;

    void on_linop_advanced_apply_started(const LinOp *A, const LinOp *alpha,
                                         const LinOp *b, const LinOp *beta,
                                         const LinOp *x) const override;

    void on_linop_advanced_apply_completed(const LinOp *A, const LinOp *alpha,
                                           const LinOp *b, const LinOp *beta,
                                           const LinOp *x) const override;

    /* LinOpFactory events */
    void on_linop_factory_generate_started(const LinOpFactory *factory,
                                           const LinOp *input) const override;

    void on_linop_factory_generate_completed(
        const LinOpFactory *factory, const LinOp *input,
        const LinOp *output) const override;

    /* Criterion events */
    void on_criterion_check_started(const stop::Criterion *criterion,
                                    const size_type &num_iterations,
                                    const LinOp *residual,
                                    const LinOp *residual_norm,
                                    const LinOp *solution,
                                    const uint8 &stopping_id,
                                    const bool &set_finalized) const override;

    void on_criterion_check_completed(
        const stop::Criterion *criterion, const size_type &num_iterations,
        const LinOp *residual, const LinOp *residual_norm,
        const LinOp *solutino, const uint8 &stopping_id,
        const bool &set_finalized, const Array<stopping_status> *status,
        const bool &one_changed, const bool &all_converged) const override;

    /* Internal solver events */
    void on_iteration_complete(
        const LinOp *solver, const size_type &num_iterations,
        const LinOp *residual, const LinOp *solution = nullptr,
        const LinOp *residual_norm = nullptr) const override;

    static std::unique_ptr<Stream> create(
        std::shared_ptr<const Executor> exec,
        const Logger::mask_type &enabled_events = Logger::all_events_mask,
        std::ostream &os = std::cout, bool verbose = false)
    {
        return std::unique_ptr<Stream>(
            new Stream(exec, enabled_events, os, verbose));
    }

protected:
    explicit Stream(
        std::shared_ptr<const gko::Executor> exec,
        const Logger::mask_type &enabled_events = Logger::all_events_mask,
        std::ostream &os = std::cout, bool verbose = false)
        : Logger(exec, enabled_events), os_(os), verbose_(verbose)
    {}


private:
    std::ostream &os_;
    static constexpr const char *prefix_ = "[LOG] >>> ";
    bool verbose_;
};


}  // namespace log
}  // namespace gko


#endif  // GKO_CORE_LOG_STREAM_HPP_