git.m6w6.name Git - m6w6/libmemcached/blob - contrib/bin/memaslap/ms_task.h

   1 /*
   2     +--------------------------------------------------------------------+
   3     | libmemcached - C/C++ Client Library for memcached                  |
   4     +--------------------------------------------------------------------+
   5     | Redistribution and use in source and binary forms, with or without |
   6     | modification, are permitted under the terms of the BSD license.    |
   7     | You should have received a copy of the license in a bundled file   |
   8     | named LICENSE; in case you did not receive a copy you can review   |
   9     | the terms online at: https://opensource.org/licenses/BSD-3-Clause  |
  10     +--------------------------------------------------------------------+
  11     | Copyright (c) 2006-2014 Brian Aker   https://datadifferential.com/ |
  12     | Copyright (c) 2020 Michael Wallner   <mike@php.net>                |
  13     +--------------------------------------------------------------------+
  14 */
  15
  16 #ifndef MS_TASK_H
  17 #define MS_TASK_H
  18
  19 #include <sys/types.h>
  20 #include <stdint.h>
  21 #if !defined(__cplusplus)
  22 #  include <stdbool.h>
  23 #endif
  24 #include <time.h>
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 #define UNIT_ITEMS_COUNT  1024               /* each window unit has 1024 items */
  31 #define KEY_PREFIX_SIZE   (sizeof(uint64_t)) /* key prefix length: 8 bytes */
  32 #define INVALID_OFFSET    (-1)               /* invalid offset in the character table */
  33 #define FIXED_EXPIRE_TIME 60                 /* default expire time is 60s */
  34 #define EXPIRE_TIME_ERROR 5                  /* default expire time error is 5s */
  35
  36 /* information of a task item(object) */
  37 typedef struct task_item {
  38   uint64_t key_prefix;   /* prefix of the key, 8 bytes, binary */
  39   int key_size;          /* key size */
  40   int key_suffix_offset; /* suffix offset in the global character table */
  41
  42   int value_size;   /* data size */
  43   int value_offset; /* data offset in the global character table */
  44
  45   time_t client_time; /* the current client time */
  46   int exp_time;       /* expire time */
  47 } ms_task_item_t;
  48
  49 /* task item for multi-get */
  50 typedef struct mlget_task_item {
  51   ms_task_item_t *item; /* task item */
  52   bool verify;          /* whether verify data or not */
  53   bool finish_verify;   /* whether finish data verify or not */
  54   bool get_miss;        /* whether get miss or not */
  55 } ms_mlget_task_item_t;
  56
  57 /* information of multi-get task */
  58 typedef struct mlget_task {
  59   ms_mlget_task_item_t *mlget_item; /* multi-get task array */
  60   int mlget_num;                    /* how many tasks in mlget_task array */
  61   int value_index;                  /* the nth value received by the connect, for multi-get */
  62 } ms_mlget_task_t;
  63
  64 /* structure used to store the state of the running task */
  65 typedef struct task {
  66   int cmd;              /* command name */
  67   bool verify;          /* whether verify data or not */
  68   bool finish_verify;   /* whether finish data verify or not */
  69   bool get_miss;        /* whether get miss or not */
  70   ms_task_item_t *item; /* task item */
  71
  72   /* counter for command distribution adjustment */
  73   uint64_t get_opt;       /* number of total get operations */
  74   uint64_t set_opt;       /* number of total set operations, no including warmup set count */
  75   int cycle_undo_get;     /* number of undo get in an adjustment cycle */
  76   int cycle_undo_set;     /* number of undo set in an adjustment cycle */
  77   uint64_t verified_get;  /* number of total verified get operations */
  78   uint64_t overwrite_set; /* number of total overwrite set operations */
  79 } ms_task_t;
  80
  81 struct conn;
  82
  83 /* the state machine call the function to execute task.*/
  84 int ms_exec_task(struct conn *c);
  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 #ifdef __cplusplus
  90 }
  91 #endif
  92
  93 #endif /* end of MS_TASK_H */