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Lua之协同程序coroutine代码实例

2020-04-24 11:19脚本之家 Lua

这篇文章主要介绍了Lua之协同程序coroutine代码实例,本文给出的代码示例较为复杂,需要对Lua协同程序有一定的了解方能看懂,需要的朋友可以参考下

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do
    --create coroutine table
    --coroutine state: suspended, running, dead, normal
    --when create the coroutine, the status is suspended, After calling it, the status is dead
    --get the coroutine status by the way coroutine.status
    local coA = 0;
    local coB = 0;
 
    function createCoroutineA()
 
        coA = coroutine.create(
                                        function()
                                            --for i = 0, 10 do
                                                print("coA: ", 0);
                                                print("coB status: ", coroutine.status(coB)); --normal status
                                                print("coA status: ", coroutine.status(coA));
                                                print("coA coroutine next status");
                                                --coroutine.yield();--the current coroutine is suspended
                                            --end
                                        end
                                    );
        print("From coA to resume coB");
    end
 
 
    function createCoroutineB()
 
        coB = coroutine.create(
                                        function()
                                            --for i = 0, 10 do
                                                print("coB: ", 0);
                                                print("coA status: ", coroutine.status(coA));
                                                coroutine.resume(coA); --when resume coA, the coB will suspended, calling coB ,the coA status is
                                                --suspended and dead, this time will continue to execute the next code
                                                print("coB status: ", coroutine.status(coB));
                                                print("coB coroutine next status");
                                                --coroutine.yield();
                                            --end
                                        end
                                    );
        print("From coB to resume coA");
    end
 
    --display the coA and coB status
    createCoroutineA();
    print(coroutine.status(coA));
 
    createCoroutineB();
    print(coroutine.status(coB));
 
    coroutine.resume(coB);
    print(coroutine.resume(coB)); --if the coroutine is dead ,the resume will resume false, and can't resume the dead coroutine
    --print("coA status: ", coroutine.status(coA));
    --print("coB status: ", coroutine.status(coB));
end

注:
resume得到返回值,
如果有对应的yield在wait resume,那么yield的参数作为resum的返回值,第一个返回值表示coroutine没有错误,后面的返回值个数及其值视yeild参数而定。
如果没有yield在wait,那么返回值是对应函数的返回值,:true,* * *

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do
    --create coroutine table
    --coroutine state: suspended, running, dead, normal
    --when create the coroutine, the status is suspended, After calling it, the status is dead
    --get the coroutine status by the way coroutine.status
    local coA = 0;
    local coB = 0;
 
    function createCoroutineA()
 
        coA = coroutine.create(
                                        function(paramA, paramB)
                                            --for i = 0, 10 do
                                                print("coA: ", 0);
                                                coroutine.yield(paramA, paramB);--the current coroutine is suspended
                                            --end
                                            return 100, 200;
                                        end
                                    );
        print("From coA to resume coB");
    end
 
 
    function createCoroutineB()
 
        coB = coroutine.create(
                                        function()
                                            --for i = 0, 10 do
                                                print("coB: ", 0);
                                                print("coA status: ", coroutine.status(coA));
                                                coroutine.resume(coA); --when resume coA, the coB will suspended, calling coB ,the coA status is
                                                --suspended and dead, this time will continue to execute the next code
                                                print("coB status: ", coroutine.status(coB));
                                                print("coB coroutine next status");
                                                --coroutine.yield();
                                            --end
                                        end
                                    );
        print("From coB to resume coA");
    end
    createCoroutineA();
    --if not yield is waiting ,the return values that the main function return as the results of the resume
    --or the return as the yield params
    print( coroutine.resume(coA, 10, 20));--OutPut:true, 10, 20
 
 
 
end

 

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