text: /*
   * Copyright (c) 2014 Nicira, Inc.
   *
   * 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 OVS_NUMA_H
  #define OVS_NUMA_H 1
  
  #include <limits.h>
  #include <stdbool.h>
  
  #include "compiler.h"
  #include "list.h"
  
  #define OVS_CORE_UNSPEC INT_MAX
  #define OVS_NUMA_UNSPEC INT_MAX
  
  /* Dump of a list of 'struct ovs_numa_info'. */
  struct ovs_numa_dump {
      struct ovs_list dump;
  };
  
  /* A numa_id - core_id pair. */
  struct ovs_numa_info {
      struct ovs_list list_node;
      int numa_id;
      int core_id;
  };
  
  #ifdef __linux__
  
  void ovs_numa_init(void);
  bool ovs_numa_numa_id_is_valid(int numa_id);
  bool ovs_numa_core_id_is_valid(int core_id);
  bool ovs_numa_core_is_pinned(int core_id);
  int ovs_numa_get_n_numas(void);
  void ovs_numa_set_cpu_mask(const char *cmask);
  int ovs_numa_get_n_cores(void);
  int ovs_numa_get_numa_id(int core_id);
  int ovs_numa_get_n_cores_on_numa(int numa_id);
  int ovs_numa_get_n_unpinned_cores_on_numa(int numa_id);
  bool ovs_numa_try_pin_core_specific(int core_id);
  int ovs_numa_get_unpinned_core_any(void);
  int ovs_numa_get_unpinned_core_on_numa(int numa_id);
  void ovs_numa_unpin_core(int core_id);
  struct ovs_numa_dump *ovs_numa_dump_cores_on_numa(int numa_id);
  void ovs_numa_dump_destroy(struct ovs_numa_dump *);
  
  #define FOR_EACH_CORE_ON_NUMA(ITER, DUMP)                    \
      LIST_FOR_EACH((ITER), list_node, &(DUMP)->dump)
  
  #else
  
  static inline void
  ovs_numa_init(void)
  {
      /* Nothing */
  }
  
  static inline bool
  ovs_numa_numa_id_is_valid(int numa_id OVS_UNUSED)
  {
      return false;
  }
  
  static inline bool
  ovs_numa_core_id_is_valid(int core_id OVS_UNUSED)
  {
      return false;
  }
  
  static inline bool
  ovs_numa_core_is_pinned(int core_id OVS_UNUSED)
  {
      return false;
  }
  
  static inline void
  ovs_numa_set_cpu_mask(const char *cmask OVS_UNUSED)
  {
      /* Nothing */
  }
  
  static inline int
  ovs_numa_get_n_numas(void)
  {
      return OVS_NUMA_UNSPEC;
  }
  
  static inline int
  ovs_numa_get_n_cores(void)
  {
      return OVS_CORE_UNSPEC;
  }
  
  static inline int
  ovs_numa_get_numa_id(int core_id OVS_UNUSED)
  {
      return OVS_NUMA_UNSPEC;
  }
  
  static inline int
  ovs_numa_get_n_cores_on_numa(int numa_id OVS_UNUSED)
  {
      return OVS_CORE_UNSPEC;
  }
  
  static inline int
  ovs_numa_get_n_unpinned_cores_on_numa(int numa_id OVS_UNUSED)
  {
      return OVS_CORE_UNSPEC;
  }
  
  static inline bool
  ovs_numa_try_pin_core_specific(int core_id OVS_UNUSED)
  {
      return false;
  }
  
  static inline int
  ovs_numa_get_unpinned_core_any(void)
  {
      return OVS_CORE_UNSPEC;
  }
  
  static inline int
  ovs_numa_get_unpinned_core_on_numa(int numa_id OVS_UNUSED)
  {
      return OVS_CORE_UNSPEC;
  }
  
  static inline void
  ovs_numa_unpin_core(int core_id OVS_UNUSED)
  {
      /* Nothing */
  }
  
  static inline struct ovs_numa_dump *
  ovs_numa_dump_cores_on_numa(int numa_id OVS_UNUSED)
  {
      return NULL;
  }
  
  static inline void
  ovs_numa_dump_destroy(struct ovs_numa_dump *dump OVS_UNUSED)
  {
      /* Nothing */
  }
  
  /* No loop. */
  #define FOR_EACH_CORE_ON_NUMA(ITER, DUMP)                    \
      for ((ITER) = NULL; (ITER);)
  
  #endif /* __linux__ */
  #endif /* ovs-thead.h */
  