/*
 * Copyright (c) 2010 Cisco Systems, Inc.  All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */

#ifndef OPAL_MEMORY_LINUX_H
#define OPAL_MEMORY_LINUX_H

#include "opal_config.h"

#include "opal/mca/memory/memory.h"

BEGIN_C_DECLS

/* Component structure */

typedef struct opal_memory_linux_component_t {
    opal_memory_base_component_2_0_0_t super;

    /* Component data */
    int verbose_level;
    int enable_ummunotify;
    int enable_ptmalloc2;

#if MEMORY_LINUX_UMMUNOTIFY
    /* Ummunotify-specific data */
    int ummunotify_fd;
#endif

#if MEMORY_LINUX_PTMALLOC2
    /* Ptmalloc2-specific data. Note that these variables are all marked as volatile.
     * This is needed because of what may be a buggy optimization in the GCC 4.9.2
     * compilers and later. These variables are used in different code paths which the
     * compiler is not aware of.
     * Extra details located at these URLs:
     * Open MPI User List: http://www.open-mpi.org/community/lists/users/2015/06/27039.php
     * Bug Discussion: https://github.com/open-mpi/ompi/pull/625
     * GCC Discussion: https://gcc.gnu.org/ml/gcc-bugs/2015-06/msg00757.html
     */
    volatile bool free_invoked;
    volatile bool malloc_invoked;
    volatile bool realloc_invoked;
    volatile bool memalign_invoked;
    volatile bool munmap_invoked;
#endif
} opal_memory_linux_component_t;

/* memory_linux_component.c */

extern opal_memory_linux_component_t mca_memory_linux_component;


#if MEMORY_LINUX_UMMUNOTIFY
/* memory_linux_ummunotify.c */
int opal_memory_linux_ummunotify_open(void);
int opal_memory_linux_ummunotify_close(void);
#endif /* MEMORY_LINUX_UMMUNOTIFY */

#if MEMORY_LINUX_PTMALLOC2
/* memory_linux_ptmalloc2.c */
int opal_memory_linux_ptmalloc2_open(void);
int opal_memory_linux_ptmalloc2_close(void);
OPAL_DECLSPEC void opal_memory_linux_malloc_init_hook(void);

/* memory_linux_munmap.c */
OPAL_DECLSPEC int opal_memory_linux_free_ptmalloc2_munmap(void *start, size_t length, int from_alloc);
OPAL_DECLSPEC int munmap(void* addr, size_t len);
#endif /* !MEMORY_LINUX_PTMALLOC2 */

END_C_DECLS

#endif