The functions are cancellation points and might cause a pending signal to get delivered in a threaded environment when the program is not expecting it.
这些函数都是可撤销点，并且可能导致在线程环境中产生一个该程序并不期望的挂起信号。
The functions are cancellation points and might cause a pending signal to get delivered in a threaded environment when the program is not expecting it.
这些函数都是可撤销点，并且可能导致在线程环境中产生一个该程序并不期望的挂起信号。
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