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nimスレッド操作

Posted at

概要

nimのスレッド操作をコツコツと。
nimのコンパイルオプションに、--threads:onを指定する必要があるようです。

以下メモ

スレッド実行サンプル

import locks
import math
import os
block:
  var
    thr: array [0..4, Thread[tuple[a,b,c: int]]]
    L: Lock
  # 乱数初期化
  randomize()
  # スレッドとして実行する関数
  proc threadFunc(interval: tuple[a,b,c: int]) {.thread.} =
    for i in interval.a..interval.b:
      acquire(L) # lock stdout
      echo interval.a,"=>",i
      release(L)
      sleep(interval.c)
  # ロックの初期化
  initLock(L)
  # スレッドを複数実行
  for i in 0..high(thr):
    var sleepTime = random(1000.0).toInt + 1000
    # 関数へ渡す値をタプルで渡す
    createThread(thr[i], threadFunc, (i*10 , i*10+5 , sleepTime ))
  # スレッド終了待機
  joinThreads(thr)
(stdout)
30=>30
0=>0
20=>20
40=>40
10=>10
20=>21
30=>31
40=>41
0=>1
10=>11
20=>22
30=>32
40=>42
0=>2
20=>23
10=>12
30=>33
20=>24
40=>43
0=>3
30=>34
10=>13
20=>25
40=>44
30=>35
0=>4
10=>14
40=>45
0=>5
10=>15
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