text: /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
  /*
   * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
   *                         University Research and Technology
   *                         Corporation.  All rights reserved.
   * Copyright (c) 2004-2013 The University of Tennessee and The University
   *                         of Tennessee Research Foundation.  All rights
   *                         reserved.
   * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
   *                         University of Stuttgart.  All rights reserved.
   * Copyright (c) 2004-2005 The Regents of the University of California.
   *                         All rights reserved.
   * Copyright (c) 2006      Voltaire. All rights reserved.
   * Copyright (c) 2011-2015 Los Alamos National Security, LLC. All rights
   *                         reserved.
   *
   * $COPYRIGHT$
   *
   * Additional copyrights may follow
   *
   * $HEADER$
   */
  /**
   * @file
   */
  #ifndef MCA_MPOOL_HUGEPAGE_H
  #define MCA_MPOOL_HUGEPAGE_H
  
  #include "opal_config.h"
  #include "opal/class/opal_list.h"
  #include "opal/class/opal_free_list.h"
  #include "opal/mca/event/event.h"
  #include "opal/mca/mpool/mpool.h"
  #include "opal/util/proc.h"
  #include "opal/mca/allocator/allocator.h"
  #include "opal/util/sys_limits.h"
  
  BEGIN_C_DECLS
  struct mca_mpool_hugepage_module_t;
  typedef struct mca_mpool_hugepage_module_t mca_mpool_hugepage_module_t;
  
  struct mca_mpool_hugepage_component_t {
      mca_mpool_base_component_t super;
      bool print_stats;
      opal_list_t huge_pages;
      mca_mpool_hugepage_module_t *modules;
      int module_count;
      unsigned long bytes_allocated;
  };
  typedef struct mca_mpool_hugepage_component_t mca_mpool_hugepage_component_t;
  
  OPAL_DECLSPEC extern mca_mpool_hugepage_component_t mca_mpool_hugepage_component;
  
  struct mca_mpool_hugepage_module_t;
  
  struct mca_mpool_hugepage_hugepage_t {
      /** opal list item superclass */
      opal_list_item_t super;
      /** page size in bytes */
      unsigned long    page_size;
      /** path for mmapped files */
      char            *path;
      /** counter to help ensure unique file names for mmaped files */
      volatile int32_t count;
      /** some platforms allow allocation of hugepages through mmap flags */
      int              mmap_flags;
  };
  typedef struct mca_mpool_hugepage_hugepage_t mca_mpool_hugepage_hugepage_t;
  
  OBJ_CLASS_DECLARATION(mca_mpool_hugepage_hugepage_t);
  
  struct mca_mpool_hugepage_module_t {
      mca_mpool_base_module_t super;
      mca_mpool_hugepage_hugepage_t *huge_page;
      mca_allocator_base_module_t *allocator;
      opal_mutex_t lock;
      opal_rb_tree_t allocation_tree;
  };
  
  /*
   *  Initializes the mpool module.
   */
  int mca_mpool_hugepage_module_init (mca_mpool_hugepage_module_t *mpool,
                                      mca_mpool_hugepage_hugepage_t *huge_page);
  
  void *mca_mpool_hugepage_seg_alloc (void *ctx, size_t *sizep);
  void mca_mpool_hugepage_seg_free (void *ctx, void *addr);
  
  END_C_DECLS
  #endif
  