git.m6w6.name Git - awesomized/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 #include <stdbool.h>
  17 #include <time.h>
  18
  19 #ifdef __cplusplus
  20 extern "C" {
  21 #endif
  22
  23 #define UNIT_ITEMS_COUNT     1024               /* each window unit has 1024 items */
  24 #define KEY_PREFIX_SIZE      (sizeof(uint64_t)) /* key prefix length: 8 bytes */
  25 #define INVALID_OFFSET       (-1)               /* invalid offset in the character table */
  26 #define FIXED_EXPIRE_TIME    60                 /* default expire time is 60s */
  27 #define EXPIRE_TIME_ERROR    5                  /* default expire time error is 5s */
  28
  29 /* information of a task item(object) */
  30 typedef struct task_item
  31 {
  32   uint64_t key_prefix;                  /* prefix of the key, 8 bytes, binary */
  33   int key_size;                         /* key size */
  34   int key_suffix_offset;                /* suffix offset in the global character table */
  35
  36   int value_size;                       /* data size */
  37   int value_offset;                     /* data offset in the global character table */
  38
  39   time_t client_time;                   /* the current client time */
  40   int exp_time;                         /* expire time */
  41 } ms_task_item_t;
  42
  43 /* task item for multi-get */
  44 typedef struct mlget_task_item
  45 {
  46   ms_task_item_t *item;                 /* task item */
  47   bool verify;                          /* whether verify data or not */
  48   bool finish_verify;                   /* whether finish data verify or not */
  49   bool get_miss;                        /* whether get miss or not */
  50 } ms_mlget_task_item_t;
  51
  52 /* information of multi-get task */
  53 typedef struct mlget_task
  54 {
  55   ms_mlget_task_item_t *mlget_item;        /* multi-get task array */
  56   int mlget_num;                           /* how many tasks in mlget_task array */
  57   int value_index;                         /* the nth value received by the connect, for multi-get */
  58 } ms_mlget_task_t;
  59
  60 /* structure used to store the state of the running task */
  61 typedef struct task
  62 {
  63   int cmd;                              /* command name */
  64   bool verify;                          /* whether verify data or not */
  65   bool finish_verify;                   /* whether finish data verify or not */
  66   bool get_miss;                        /* whether get miss or not */
  67   ms_task_item_t *item;                 /* task item */
  68
  69   /* counter for command distribution adjustment */
  70   uint64_t get_opt;                     /* number of total get operations */
  71   uint64_t set_opt;                     /* number of total set operations, no including warmup set count */
  72   int cycle_undo_get;                   /* number of undo get in an adjustment cycle */
  73   int cycle_undo_set;                   /* number of undo set in an adjustment cycle */
  74   uint64_t verified_get;                /* number of total verified get operations */
  75   uint64_t overwrite_set;               /* number of total overwrite set operations */
  76 } ms_task_t;
  77
  78 struct conn;
  79
  80 /* the state machine call the function to execute task.*/
  81 int ms_exec_task(struct conn *c);
  82
  83
  84 /* calculate the difference value of two time points */
  85 int64_t ms_time_diff(struct timeval *start_time, struct timeval *end_time);
  86
  87
  88 #ifdef __cplusplus
  89 }
  90 #endif
  91
  92 #endif /* end of MS_TASK_H */