(原)torch中threads的addjob函数使用方法

转载请注明出处:

http://www.cnblogs.com/darkknightzh/p/6549452.html

参考网址:

https://github.com/torch/threads#examples

 

1. addjob简单示例

参考网址中给出了torch中threads的addjob函数使用方法:

local threads = require 'threads'

local nthread = 4
local njob = 10
local msg = "hello from a satellite thread"

local pool = threads.Threads(
   nthread,
   function(threadid)
      print('starting a new thread/state number ' .. threadid)
      gmsg = msg -- get it the msg upvalue and store it in thread state
   end
)

local jobdone = 0
for i=1,njob do
   pool:addjob(
      function()  -- note1
         print(string.format('%s -- thread ID is %x', gmsg, __threadid))
         return __threadid
      end,
      function(id)
         print(string.format("task %d finished (ran on thread ID %x)", i, id))
         jobdone = jobdone + 1
      end
      -- note2
   )
end

pool:synchronize()
print(string.format('%d jobs done', jobdone))
pool:terminate()

上面程序是一个简单的例子。

2. addjob传入参数

note1的地方,当该函数无输入参数时,直接那样写,同时note2处什么也不写。

如果note1的function需要传入参数,可以写上参数列表,同时在note2处加上参数。如下所示:

pool:addjob(
   function(variable1, variable2, bariable3)  -- note1
      -- code …
   end,
   function(id)
      -- code …
   end,
   var1,    -- note2
   var2,
   var3
)

3. addjob函数说明

addjob函数如下:

Threads:addjob([id], callback, [endcallback], [...])

callback为在队列线程中执行的函数,endcallback为在主线程中执行的函数。

 

posted on 2017-03-14 17:00  darkknightzh  阅读(811)  评论(0编辑  收藏  举报

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