volatile变量 [英] Volatile variable

问题描述

哪里是存储在存储在程序存储器（其中部分）？

Where is a volatile variable stored in the stored in program memory(in which section) ?

推荐答案

挥发性是的类型限定符不是存储类说明，所以也没有确定的存储位置在所有;它影响变量的类型，而不是它的存储的定义中。

volatile is a type qualifier not a storage class specifier, so it does not determine storage location at all; it affects the definition of a variable's type, not its storage.

它只是强制编译器明确地读一个变量，其的键入的是挥发性从变量的存储位置（可以是任何地方），而不是假设一些previously在例如寄存器读取值仍然有效。

It simply forces the compiler to explicitly read a variable whose type is volatile from the variable's storage location (wherever that may be) rather than assuming that some previously read value in a register for example remains valid.

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