parallel_core.h

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/*
**  parallel_core.h
**
**  This is part of Shiokaze, a research-oriented fluid solver for computer graphics.
**  Created by Ryoichi Ando <rand@nii.ac.jp> on Feb 1, 2017.
**
**  Permission is hereby granted, free of charge, to any person obtaining a copy of
**  this software and associated documentation files (the "Software"), to deal in
**  the Software without restriction, including without limitation the rights to use,
**  copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
**  Software, and to permit persons to whom the Software is furnished to do so,
**  subject to the following conditions:
**
**  The above copyright notice and this permission notice shall be included in all copies
**  or substantial portions of the Software.
**
**  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
**  INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
**  PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
**  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
**  CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
**  OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
//
#ifndef SHKZ_PARALLEL_CORE_H
#define SHKZ_PARALLEL_CORE_H
//
#include <shiokaze/core/recursive_configurable_module.h>
#include <functional>
#include <vector>
#include <dlfcn.h>
//
SHKZ_BEGIN_NAMESPACE
//
static bool *g_shkz_force_single_thread {nullptr};
//
class parallel_core : public recursive_configurable_module {
public:
    //
    DEFINE_MODULE(parallel_core,"Parallel Core","Parallel","Paralell operation dispatcher module")
    virtual void for_each(
        std::function<void(size_t n, int thread_index)> func,
        std::function<size_t(int thread_index)> iterator_start,
        std::function<bool(size_t &n, int thread_index)> iterator_advance,
        int num_threads ) const = 0;
    virtual void run( const std::vector<std::function<void()> > &functions ) const = 0;
    static void force_single_thread( bool value ) {
        if( ! g_shkz_force_single_thread ) {
            g_shkz_force_single_thread = static_cast<bool *>(::dlsym(RTLD_DEFAULT,"g_shkz_force_single_thread"));
            assert(g_shkz_force_single_thread);
        }
        *g_shkz_force_single_thread = value;
    }
private:
};
//
using parallel_ptr = std::unique_ptr<parallel_core>;
//
SHKZ_END_NAMESPACE
//
#endif
//