linuxmanpselect中的race含义Thereasonthatpselect()isneededisthatifonewantstowaitforeitherasignalorforafiledescriptortobecomeready,thenanatomictestisneededtopreventraceconditions.这段话中,thenanatomictestis

Question

linux man pselect 中的race含义
The reason that pselect() is needed is that if one wants to wait for
either a signal or for a file descriptor to become ready,then an
atomic test is needed to prevent race conditions.
这段话中,then an atomic test is needed to prevent race conditions 中的race 与 atomic 应该如何理解

Answer 1

atomic 自动地【前后文：is equivalent to atomically executing the following calls:】race 竞争【前后文：hang indefinitely if the signal arrived just after the test but just before the call】...