setsockopt和select在设置超时方面的区别解决方案
setsockopt和select在设置超时方面的区别
对于read，write 操作,setsockopt和select在设置非阻塞方面都可以
它们有什么区别呢？
------解决方案--------------------
setsockopt是通过信号来处理的, 超时的时候,read/write返回-1, 而且精度是毫秒级,同时只能一个句柄阻塞.
select可以设置更高的精度(微秒), 同时可以处理多个句柄的阻塞.
------解决方案--------------------
setsockopt方法只要設置一次就行了，以後每個read操作前不需要再設置
而select的話，每個read操作都需要設置一下timeout。
We set this option once for a descriptor, specifying the timeout value, and this timeout then applies to all read operations on that descriptor. The nice thing about this method is that we set the option only once, compared to the previous two methods, which required doing something before every operation on which we wanted to place a time limit.
对于read，write 操作,setsockopt和select在设置非阻塞方面都可以
它们有什么区别呢？
------解决方案--------------------
setsockopt是通过信号来处理的, 超时的时候,read/write返回-1, 而且精度是毫秒级,同时只能一个句柄阻塞.
select可以设置更高的精度(微秒), 同时可以处理多个句柄的阻塞.
------解决方案--------------------
setsockopt方法只要設置一次就行了，以後每個read操作前不需要再設置
而select的話，每個read操作都需要設置一下timeout。
We set this option once for a descriptor, specifying the timeout value, and this timeout then applies to all read operations on that descriptor. The nice thing about this method is that we set the option only once, compared to the previous two methods, which required doing something before every operation on which we wanted to place a time limit.