openmp_internal.h

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/*
 * Copyright 2025 Stanford University, NVIDIA Corporation
 * SPDX-License-Identifier: Apache-2.0
 *
 * 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 REALM_OPENMP_INTERNAL_H
#define REALM_OPENMP_INTERNAL_H
 
#include "realm/realm_config.h"
#include "realm/proc_impl.h"
#include "realm/tasks.h"
 
#include <vector>
 
namespace Realm {
 
#ifndef REALM_OPENMP_SYSTEM_RUNTIME
  class ThreadPool;
#endif
 
  // this is nearly identical to a LocalCPUProcessor, but it asks for its thread(s)
  //  to run on the specified numa domain
 
  class REALM_INTERNAL_API_EXTERNAL_LINKAGE LocalOpenMPProcessor
    : public LocalTaskProcessor {
  public:
    LocalOpenMPProcessor(RuntimeImpl *runtime_impl, Processor _me, int _numa_node,
                         int _num_threads, bool _fake_cpukind, CoreReservationSet &crs,
                         size_t _stack_size, bool _force_kthreads);
    virtual ~LocalOpenMPProcessor(void);
 
    virtual void shutdown(void);
 
    int get_num_threads(void) const noexcept;
 
  protected:
    class OpenMPContextManager : public TaskContextManager {
    public:
      OpenMPContextManager(LocalOpenMPProcessor *_proc);
 
      void lazy_init_affinity() const;
 
      void *create_context(InternalTask *task) const override;
      void *create_context(Task *task) const override;
      void destroy_context(Task *task, void *context) const override;
      void destroy_context(InternalTask *task, void *context) const override;
 
    protected:
      LocalOpenMPProcessor *proc;
    };
 
    int numa_node;
    int num_threads;
    CoreReservation *core_rsrv;
    OpenMPContextManager ctxmgr;
#ifdef REALM_OPENMP_SYSTEM_RUNTIME
    bool omp_threads_mapped;
#else
    ThreadPool *pool;
#endif
  };
 
}; // namespace Realm
 
#endif