git.m6w6.name Git - m6w6/libmemcached/blob - clients/ms_task.h

   1 /*
   2  * File:   ms_task.h
   3  * Author: Mingqiang Zhuang
   4  *
   5  * Created on February 10, 2009
   6  *
   7  * (c) Copyright 2009, Schooner Information Technology, Inc.
   8  * http://www.schoonerinfotech.com/
   9  *
  10  */
  11 #ifndef MS_TASK_H
  12 #define MS_TASK_H
  13
  14 #include <sys/types.h>
  15 #include <stdint.h>
  16 #if !defined(__cplusplus)
  17 # include <stdbool.h>
  18 #endif
  19 #include <time.h>
  20
  21 #ifdef __cplusplus
  22 extern "C" {
  23 #endif
  24
  25 #define UNIT_ITEMS_COUNT     1024               /* each window unit has 1024 items */
  26 #define KEY_PREFIX_SIZE      (sizeof(uint64_t)) /* key prefix length: 8 bytes */
  27 #define INVALID_OFFSET       (-1)               /* invalid offset in the character table */
  28 #define FIXED_EXPIRE_TIME    60                 /* default expire time is 60s */
  29 #define EXPIRE_TIME_ERROR    5                  /* default expire time error is 5s */
  30
  31 /* information of a task item(object) */
  32 typedef struct task_item
  33 {
  34   uint64_t key_prefix;                  /* prefix of the key, 8 bytes, binary */
  35   int key_size;                         /* key size */
  36   int key_suffix_offset;                /* suffix offset in the global character table */
  37
  38   int value_size;                       /* data size */
  39   int value_offset;                     /* data offset in the global character table */
  40
  41   time_t client_time;                   /* the current client time */
  42   int exp_time;                         /* expire time */
  43 } ms_task_item_t;
  44
  45 /* task item for multi-get */
  46 typedef struct mlget_task_item
  47 {
  48   ms_task_item_t *item;                 /* task item */
  49   bool verify;                          /* whether verify data or not */
  50   bool finish_verify;                   /* whether finish data verify or not */
  51   bool get_miss;                        /* whether get miss or not */
  52 } ms_mlget_task_item_t;
  53
  54 /* information of multi-get task */
  55 typedef struct mlget_task
  56 {
  57   ms_mlget_task_item_t *mlget_item;        /* multi-get task array */
  58   int mlget_num;                           /* how many tasks in mlget_task array */
  59   int value_index;                         /* the nth value received by the connect, for multi-get */
  60 } ms_mlget_task_t;
  61
  62 /* structure used to store the state of the running task */
  63 typedef struct task
  64 {
  65   int cmd;                              /* command name */
  66   bool verify;                          /* whether verify data or not */
  67   bool finish_verify;                   /* whether finish data verify or not */
  68   bool get_miss;                        /* whether get miss or not */
  69   ms_task_item_t *item;                 /* task item */
  70
  71   /* counter for command distribution adjustment */
  72   uint64_t get_opt;                     /* number of total get operations */
  73   uint64_t set_opt;                     /* number of total set operations, no including warmup set count */
  74   int cycle_undo_get;                   /* number of undo get in an adjustment cycle */
  75   int cycle_undo_set;                   /* number of undo set in an adjustment cycle */
  76   uint64_t verified_get;                /* number of total verified get operations */
  77   uint64_t overwrite_set;               /* number of total overwrite set operations */
  78 } ms_task_t;
  79
  80 struct conn;
  81
  82 /* the state machine call the function to execute task.*/
  83 int ms_exec_task(struct conn *c);
  84
  85
  86 /* calculate the difference value of two time points */
  87 int64_t ms_time_diff(struct timeval *start_time, struct timeval *end_time);
  88
  89
  90 #ifdef __cplusplus
  91 }
  92 #endif
  93
  94 #endif /* end of MS_TASK_H */