Question

我正在尝试使用两个Lua通道之间的锁，但发现这两个通道同时进入了lock_func ..Below是片段

Code Snippet
==================

require"lanes"

local linda = lanes.linda()
lock_func = lanes.genlock(linda,"M",1)

local function lock_func()
    print("Lock Acquired")
    while(true) do

    end
end


local function readerThread()

print("readerThread acquiring lock")

lock_func()

end

local function writerThread()

print("writerThread acquiring lock")
lock_func()


end


Thread1= lanes.gen("*",{globals = _G},writerThread)
Thread2= lanes.gen("*",{globals = _G},readerThread)

T1 = Thread1()
T2 = Thread2()

T1:join()
T2:join()

从下面的输出我们可以看到两个车道同时进入了lock_func功能

output
==================
writerThread acquiring lock
Lock Acquired
readerThread acquiring lock
Lock Acquired

从上面的代码执行锁定有什么问题吗？

Answer 1

lua中锁的实现可以在下面的代码片段中完成。只有来自编写器或读取器通道的打印才能从下面的代码执行，因为获取锁的任何通道都将进入无限循环（只是为了看到锁正在按预期工作）＆amp;其他车道将等待锁定被释放。

require"lanes"

local linda = lanes.linda()
f = lanes.genlock(linda,"M",1)


local function readerThread()
require"lanes"

f(1)
print("readerThread acquiring lock")
while(true) do
end
f(-1)

end

local function writerThread()
require"lanes"

f(1)
print("writerThread acquiring lock")
while(true) do
end
f(-1)

end


Thread1= lanes.gen("*",{globals = _G},writerThread)
Thread2= lanes.gen("*",{globals = _G},readerThread)

T1 = Thread1()
T2 = Thread2()

T1:join()
T2:join()

在Lua车道之间锁定

1 个答案: