/*
 * Copyright © 2009      CNRS
 * Copyright © 2009-2014 Inria.  All rights reserved.
 * Copyright © 2009-2012 Université Bordeaux 1
 * Copyright © 2009-2011 Cisco Systems, Inc.  All rights reserved.
 *
 * See COPYING in top-level directory.
 */

/* Internal types and helpers. */


#ifdef HWLOC_INSIDE_PLUGIN
/*
 * these declarations are internal only, they are not available to plugins
 * (many functions below are internal static symbols).
 */
#error This file should not be used in plugins
#endif


#ifndef HWLOC_PRIVATE_H
#define HWLOC_PRIVATE_H

#include <private/autogen/config.h>
#include <hwloc.h>
#include <hwloc/bitmap.h>
#include <private/components.h>
#include <private/debug.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_SYS_UTSNAME_H
#include <sys/utsname.h>
#endif
#include <string.h>

enum hwloc_ignore_type_e {
  HWLOC_IGNORE_TYPE_NEVER = 0,
  HWLOC_IGNORE_TYPE_KEEP_STRUCTURE,
  HWLOC_IGNORE_TYPE_ALWAYS
};

#define HWLOC_DEPTH_MAX 128

struct hwloc_topology {
  unsigned nb_levels;					/* Number of horizontal levels */
  unsigned next_group_depth;				/* Depth of the next Group object that we may create */
  unsigned level_nbobjects[HWLOC_DEPTH_MAX]; 		/* Number of objects on each horizontal level */
  struct hwloc_obj **levels[HWLOC_DEPTH_MAX];		/* Direct access to levels, levels[l = 0 .. nblevels-1][0..level_nbobjects[l]] */
  unsigned long flags;
  int type_depth[HWLOC_OBJ_TYPE_MAX];
  enum hwloc_ignore_type_e ignored_types[HWLOC_OBJ_TYPE_MAX];
  int is_thissystem;
  int is_loaded;
  hwloc_pid_t pid;                                      /* Process ID the topology is view from, 0 for self */

  unsigned bridge_nbobjects;
  struct hwloc_obj **bridge_level;
  struct hwloc_obj *first_bridge, *last_bridge;
  unsigned pcidev_nbobjects;
  struct hwloc_obj **pcidev_level;
  struct hwloc_obj *first_pcidev, *last_pcidev;
  unsigned osdev_nbobjects;
  struct hwloc_obj **osdev_level;
  struct hwloc_obj *first_osdev, *last_osdev;

  struct hwloc_binding_hooks {
    int (*set_thisproc_cpubind)(hwloc_topology_t topology, hwloc_const_cpuset_t set, int flags);
    int (*get_thisproc_cpubind)(hwloc_topology_t topology, hwloc_cpuset_t set, int flags);
    int (*set_thisthread_cpubind)(hwloc_topology_t topology, hwloc_const_cpuset_t set, int flags);
    int (*get_thisthread_cpubind)(hwloc_topology_t topology, hwloc_cpuset_t set, int flags);
    int (*set_proc_cpubind)(hwloc_topology_t topology, hwloc_pid_t pid, hwloc_const_cpuset_t set, int flags);
    int (*get_proc_cpubind)(hwloc_topology_t topology, hwloc_pid_t pid, hwloc_cpuset_t set, int flags);
#ifdef hwloc_thread_t
    int (*set_thread_cpubind)(hwloc_topology_t topology, hwloc_thread_t tid, hwloc_const_cpuset_t set, int flags);
    int (*get_thread_cpubind)(hwloc_topology_t topology, hwloc_thread_t tid, hwloc_cpuset_t set, int flags);
#endif

    int (*get_thisproc_last_cpu_location)(hwloc_topology_t topology, hwloc_cpuset_t set, int flags);
    int (*get_thisthread_last_cpu_location)(hwloc_topology_t topology, hwloc_cpuset_t set, int flags);
    int (*get_proc_last_cpu_location)(hwloc_topology_t topology, hwloc_pid_t pid, hwloc_cpuset_t set, int flags);

    int (*set_thisproc_membind)(hwloc_topology_t topology, hwloc_const_nodeset_t nodeset, hwloc_membind_policy_t policy, int flags);
    int (*get_thisproc_membind)(hwloc_topology_t topology, hwloc_nodeset_t nodeset, hwloc_membind_policy_t * policy, int flags);
    int (*set_thisthread_membind)(hwloc_topology_t topology, hwloc_const_nodeset_t nodeset, hwloc_membind_policy_t policy, int flags);
    int (*get_thisthread_membind)(hwloc_topology_t topology, hwloc_nodeset_t nodeset, hwloc_membind_policy_t * policy, int flags);
    int (*set_proc_membind)(hwloc_topology_t topology, hwloc_pid_t pid, hwloc_const_nodeset_t nodeset, hwloc_membind_policy_t policy, int flags);
    int (*get_proc_membind)(hwloc_topology_t topology, hwloc_pid_t pid, hwloc_nodeset_t nodeset, hwloc_membind_policy_t * policy, int flags);
    int (*set_area_membind)(hwloc_topology_t topology, const void *addr, size_t len, hwloc_const_nodeset_t nodeset, hwloc_membind_policy_t policy, int flags);
    int (*get_area_membind)(hwloc_topology_t topology, const void *addr, size_t len, hwloc_nodeset_t nodeset, hwloc_membind_policy_t * policy, int flags);
    /* This has to return the same kind of pointer as alloc_membind, so that free_membind can be used on it */
    void *(*alloc)(hwloc_topology_t topology, size_t len);
    /* alloc_membind has to always succeed if !(flags & HWLOC_MEMBIND_STRICT).
     * see hwloc_alloc_or_fail which is convenient for that.  */
    void *(*alloc_membind)(hwloc_topology_t topology, size_t len, hwloc_const_nodeset_t nodeset, hwloc_membind_policy_t policy, int flags);
    int (*free_membind)(hwloc_topology_t topology, void *addr, size_t len);
  } binding_hooks;

  struct hwloc_topology_support support;

  void (*userdata_export_cb)(void *reserved, struct hwloc_topology *topology, struct hwloc_obj *obj);
  void (*userdata_import_cb)(struct hwloc_topology *topology, struct hwloc_obj *obj, const char *name, const void *buffer, size_t length);

  struct hwloc_os_distances_s {
    hwloc_obj_type_t type;
    int nbobjs;
    unsigned *indexes; /* array of OS indexes before we can convert them into objs. always available.
			*/
    struct hwloc_obj **objs; /* array of objects, in the same order as above.
			      * either given (by a backend) together with the indexes array above.
			      * or build from the above indexes array when not given (by the user).
			      */
    float *distances; /* distance matrices, ordered according to the above indexes/objs array.
		       * distance from i to j is stored in slot i*nbnodes+j.
		       * will be copied into the main logical-index-ordered distance at the end of the discovery.
		       */
    int forced; /* set if the user forced a matrix to ignore the OS one */

    struct hwloc_os_distances_s *prev, *next;
  } *first_osdist, *last_osdist;

  /* list of enabled backends. */
  struct hwloc_backend * backends;
};

extern void hwloc_alloc_obj_cpusets(hwloc_obj_t obj);
extern void hwloc_setup_pu_level(struct hwloc_topology *topology, unsigned nb_pus);
extern int hwloc_get_sysctlbyname(const char *name, int64_t *n);
extern int hwloc_get_sysctl(int name[], unsigned namelen, int *n);
extern unsigned hwloc_fallback_nbprocessors(struct hwloc_topology *topology);
extern void hwloc_connect_children(hwloc_obj_t obj);
extern int hwloc_connect_levels(hwloc_topology_t topology);

extern void hwloc_topology_setup_defaults(struct hwloc_topology *topology);
extern void hwloc_topology_clear(struct hwloc_topology *topology);

extern void hwloc__add_info(struct hwloc_obj_info_s **infosp, unsigned *countp, const char *name, const char *value);
extern char ** hwloc__find_info_slot(struct hwloc_obj_info_s **infosp, unsigned *countp, const char *name);
extern void hwloc__move_infos(struct hwloc_obj_info_s **dst_infosp, unsigned *dst_countp, struct hwloc_obj_info_s **src_infosp, unsigned *src_countp);
extern void hwloc__free_infos(struct hwloc_obj_info_s *infos, unsigned count);

/* set native OS binding hooks */
extern void hwloc_set_native_binding_hooks(struct hwloc_binding_hooks *hooks, struct hwloc_topology_support *support);
/* set either native OS binding hooks (if thissystem), or dummy ones */
extern void hwloc_set_binding_hooks(struct hwloc_topology *topology);

#if defined(HWLOC_LINUX_SYS)
extern void hwloc_set_linuxfs_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_LINUX_SYS */

#if defined(HWLOC_BGQ_SYS)
extern void hwloc_set_bgq_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_BGQ_SYS */

#ifdef HWLOC_SOLARIS_SYS
extern void hwloc_set_solaris_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_SOLARIS_SYS */

#ifdef HWLOC_AIX_SYS
extern void hwloc_set_aix_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_AIX_SYS */

#ifdef HWLOC_OSF_SYS
extern void hwloc_set_osf_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_OSF_SYS */

#ifdef HWLOC_WIN_SYS
extern void hwloc_set_windows_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_WIN_SYS */

#ifdef HWLOC_DARWIN_SYS
extern void hwloc_set_darwin_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_DARWIN_SYS */

#ifdef HWLOC_FREEBSD_SYS
extern void hwloc_set_freebsd_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_FREEBSD_SYS */

#ifdef HWLOC_NETBSD_SYS
extern void hwloc_set_netbsd_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_NETBSD_SYS */

#ifdef HWLOC_HPUX_SYS
extern void hwloc_set_hpux_hooks(struct hwloc_binding_hooks *binding_hooks, struct hwloc_topology_support *support);
#endif /* HWLOC_HPUX_SYS */

/* Insert uname-specific names/values in the object infos array.
 * If cached_uname isn't NULL, it is used as a struct utsname instead of recalling uname.
 * Any field that starts with \0 is ignored.
 */
extern void hwloc_add_uname_info(struct hwloc_topology *topology, void *cached_uname);

/* Free obj and its attributes assuming it doesn't have any children/parent anymore */
extern void hwloc_free_unlinked_object(hwloc_obj_t obj);

/* Duplicate src and its children under newparent in newtopology */
extern void hwloc__duplicate_objects(struct hwloc_topology *newtopology, struct hwloc_obj *newparent, struct hwloc_obj *src);

/* This can be used for the alloc field to get allocated data that can be freed by free() */
void *hwloc_alloc_heap(hwloc_topology_t topology, size_t len);

/* This can be used for the alloc field to get allocated data that can be freed by munmap() */
void *hwloc_alloc_mmap(hwloc_topology_t topology, size_t len);

/* This can be used for the free_membind field to free data using free() */
int hwloc_free_heap(hwloc_topology_t topology, void *addr, size_t len);

/* This can be used for the free_membind field to free data using munmap() */
int hwloc_free_mmap(hwloc_topology_t topology, void *addr, size_t len);

/* Allocates unbound memory or fail, depending on whether STRICT is requested
 * or not */
static __hwloc_inline void *
hwloc_alloc_or_fail(hwloc_topology_t topology, size_t len, int flags)
{
  if (flags & HWLOC_MEMBIND_STRICT)
    return NULL;
  return hwloc_alloc(topology, len);
}

extern void hwloc_distances_init(struct hwloc_topology *topology);
extern void hwloc_distances_destroy(struct hwloc_topology *topology);
extern void hwloc_distances_set(struct hwloc_topology *topology, hwloc_obj_type_t type, unsigned nbobjs, unsigned *indexes, hwloc_obj_t *objs, float *distances, int force);
extern void hwloc_distances_set_from_env(struct hwloc_topology *topology);
extern void hwloc_distances_restrict_os(struct hwloc_topology *topology);
extern void hwloc_distances_restrict(struct hwloc_topology *topology, unsigned long flags);
extern void hwloc_distances_finalize_os(struct hwloc_topology *topology);
extern void hwloc_distances_finalize_logical(struct hwloc_topology *topology);
extern void hwloc_clear_object_distances(struct hwloc_obj *obj);
extern void hwloc_clear_object_distances_one(struct hwloc_distances_s *distances);
extern void hwloc_group_by_distances(struct hwloc_topology *topology);

#ifdef HAVE_USELOCALE
#include "locale.h"
#ifdef HAVE_XLOCALE_H
#include "xlocale.h"
#endif
#define hwloc_localeswitch_declare locale_t __old_locale = (locale_t)0, __new_locale
#define hwloc_localeswitch_init() do {                     \
  __new_locale = newlocale(LC_ALL_MASK, "C", (locale_t)0); \
  if (__new_locale != (locale_t)0)                         \
    __old_locale = uselocale(__new_locale);                \
} while (0)
#define hwloc_localeswitch_fini() do { \
  if (__new_locale != (locale_t)0) {   \
    uselocale(__old_locale);           \
    freelocale(__new_locale);          \
  }                                    \
} while(0)
#else /* HAVE_USELOCALE */
#define hwloc_localeswitch_declare int __dummy_nolocale __hwloc_attribute_unused
#define hwloc_localeswitch_init()
#define hwloc_localeswitch_fini()
#endif /* HAVE_USELOCALE */

#if !HAVE_DECL_FABSF
#define fabsf(f) fabs((double)(f))
#endif

#if HAVE_DECL__SC_PAGE_SIZE
#define hwloc_getpagesize() sysconf(_SC_PAGE_SIZE)
#elif HAVE_DECL__SC_PAGESIZE
#define hwloc_getpagesize() sysconf(_SC_PAGESIZE)
#elif defined HAVE_GETPAGESIZE
#define hwloc_getpagesize() getpagesize()
#else
#undef hwloc_getpagesize
#endif

/* encode src buffer into target buffer.
 * targsize must be at least 4*((srclength+2)/3)+1.
 * target will be 0-terminated.
 */
extern int hwloc_encode_to_base64(const char *src, size_t srclength, char *target, size_t targsize);
/* decode src buffer into target buffer.
 * src is 0-terminated.
 * targsize must be at least srclength*3/4+1 (srclength not including \0)
 * but only srclength*3/4 characters will be meaningful
 * (the next one may be partially written during decoding, but it should be ignored).
 */
extern int hwloc_decode_from_base64(char const *src, char *target, size_t targsize);

/* Check whether needle matches the beginning of haystack, at least n, and up
 * to a colon or \0 */
extern int hwloc_namecoloncmp(const char *haystack, const char *needle, size_t n);

#ifdef HWLOC_HAVE_ATTRIBUTE_FORMAT
# if HWLOC_HAVE_ATTRIBUTE_FORMAT
#  define __hwloc_attribute_format(type, str, arg)  __attribute__((__format__(type, str, arg)))
# else
#  define __hwloc_attribute_format(type, str, arg)
# endif
#else
# define __hwloc_attribute_format(type, str, arg)
#endif

/* On some systems, snprintf returns the size of written data, not the actually
 * required size.  hwloc_snprintf always report the actually required size. */
extern int hwloc_snprintf(char *str, size_t size, const char *format, ...) __hwloc_attribute_format(printf, 3, 4);

extern void hwloc_obj_add_info_nodup(hwloc_obj_t obj, const char *name, const char *value, int nodup);

#endif /* HWLOC_PRIVATE_H */
