#ifndef _LXC_STATS_PRIV_H_
# define _LXC_STATS_PRIV_H_

# include "compat/compat.h"
# include "probes/probes.h"

# define NSEC_PER_SEC   1000000000L

# define LXC_DIR        "/var/lib/lxc/"

# define ARRAY_SIZE(a)  (sizeof((a)) / sizeof((a)[0]))

struct      dirent;

/**
 * Store all informations needed to get statistics from a cgroup
 * hierarchy.
 */
struct          _lxcst_controller {
    char        *cgroup_dir;    /**< Mount point of the cgroup hierarchy.   */
    const char  *lxc_dir;       /**< LXC configuration directory (LXC_DIR). */
};

extern struct lxcst_globals _lxcst_globals;

/**
 * Allocate a new lxcst structure for the given container.
 */
struct lxcst    *_lxcst_container_new(const struct _lxcst_controller *, const char *);

/**
 * Free a lxcst structure.
 */
void            _lxcst_container_delete(struct lxcst *);

/**
 * Get the total number of LXC containers on this machine.
 */
int             _lxcst_container_count(const struct _lxcst_controller *ct);

/**
 * Get statistics on a container.
 */
int             _lxcst_container_read_infos(struct lxcst *);

/**
 * Reset the global statistics structure.
 */
void            _lxcst_globals_reset(void);

char            *_lxcst_join_path(char *, size_t , const char *, const char *);

/**
 * @return true if the given path is a directory.
 */
int             _lxcst_isdir(const char *);

/**
 * Allocate a buffer and read an entire file in it.
 *
 * @param [in] path Path to the file to read
 * @param [out] content A pointer to a pointer which will hold the allocated
 * buffer.
 *
 * @return The size of the buffer on sucess, -1 with errno set otherwise.
 */
ssize_t         _lxcst_read_file(const char *path, char **content);

/**
 * Split a string around spaces (defined by isspace()).
 *
 * @param [in] str The string to split, spaces are erased with '\0'.
 * @param [out] fields An array of string, each entry will point to a word of
 * the string.
 * @param [in] nfields Number of entries into the fields array.
 *
 * @return The number of fields found.
 */
int             _lxcst_strsplit(char *str, char **fields, size_t nfields);

#endif