这是因为实际的源代码和变量绑定可以更改,这是建立在环境或者构建宏预处理程序指令的时间定义的基础上的。
This is because the actual source code and the variable binding can change, based on the environment or the build time definitions of macros and preprocessor commands.
宏 INIT_WORK 提供必需的初始化数据以及处理程序函数的配置(由用户传递进来)。
The INIT_WORK macro provides for the necessary initialization and setting of the handler function (passed by the user).
编译的预处理阶段对程序文本进行宏替换,包含进其他源文件,并进行条件编译。
A preprocessing step performs macro substitution on program text, inclusion of other source files, and conditional compilation.
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