linux多线程2

下面我们将上面两个线程进行同步。

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------------- a = 0+++++++++++++ a = 1------------- b = 1+++++++++++++ b = 2------------- a = 2+++++++++++++ a = 3------------- b = 3+++++++++++++ b = 4------------- a = 4+++++++++++++ a = 5------------- b = 5+++++++++++++ b = 6------------- a = 6+++++++++++++ a = 7------------- b = 7+++++++++++++ b = 8------------- a = 8