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annotate _lxcstats.h @ 3:2cb8a6cbe468

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cpuacct: convert per cpu usage from nanoseconds to jiffies
author Louis Opter <louis@dotcloud.com>
date Fri, 31 Dec 2010 20:04:25 +0100
parents 6ce4443e7545
children 50215911acb3
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1 #ifndef _LXC_STATS_PRIV_H_
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2 # define _LXC_STATS_PRIV_H_
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3
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4 # include "compat/compat.h"
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5 # include "probes/probes.h"
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6
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7 # define NSEC_PER_SEC 1000000000L
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8
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9 struct dirent;
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10
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11 /**
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12 * Store all informations needed to get statistics from a cgroup
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13 * hierarchy.
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14 */
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15 struct _lxcst_controller {
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16 char *cgroup_dir; /**< Mount point of the cgroup hierarchy. */
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17 };
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18
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19 /**
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20 * Allocate a new lxcst structure for the given container.
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21 */
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22 struct lxcst *_lxcst_container_new(struct _lxcst_controller *, const char *);
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23
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24 /**
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25 * Free a lxcst structure.
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26 */
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27 void _lxcst_container_delete(struct lxcst *);
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28
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29 /**
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30 * Get statistics on a container.
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31 */
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32 int _lxcst_container_read_infos(struct lxcst *);
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33
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34 char *_lxcst_join_path(char *, size_t , const char *, const char *);
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35
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36 /**
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37 * Used to select only directories with scandir. We can't directly use it with
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38 * scandir because we need the cgroup_dir.
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39 *
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40 * @return true if the given directory entry is a directory.
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41 */
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42 int _lxcst_isdir(const struct _lxcst_controller *, const struct dirent *);
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43
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44 /**
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45 * Allocate a buffer and read an entire file in it.
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46 *
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47 * @param [in] path Path to the file to read
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48 * @param [out] content A pointer to a pointer which will hold the allocated
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49 * buffer.
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50 *
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51 * @return The size of the buffer on sucess, -1 with errno set otherwise.
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52 */
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53 ssize_t _lxcst_read_file(const char *path, char **content);
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54
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55 #endif