C Standard Library 简明教程

C Library - <setjmp.h>

setjmp.h 头文件定义宏 setjmp() 、一个函数 longjmp() 和一个变量类型 jmp_buf ，以绕过正常函数调用和返回规则。

The setjmp.h header defines the macro setjmp(), one function longjmp(), and one variable type jmp_buf, for bypassing the normal function call and return discipline.

Library Variables

头文件 setjmp.h 中定义的变量类型如下 −

Following is the variable type defined in the header setjmp.h −

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Variable & Description

jmp_buf This is an array type used for holding information for macro setjmp() and function longjmp().

Library Macros

此库中仅定义了一个宏 −

There is only one macro defined in this library −

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Macro & Description

int setjmp(jmp_buf environment)This macro saves the current environment into the variable environment for later use by the function longjmp(). If this macro returns directly from the macro invocation, it returns zero but if it returns from a longjmp() function call, then a non-zero value is returned.

Library Functions

头文件 setjmp.h 中定义的唯一一个函数如下 −

Following is the only one function defined in the header setjmp.h −

Sr.No.

Function & Description

void longjmp(jmp_buf environment, int value)This function restores the environment saved by the most recent call to setjmp() macro in the same invocation of the program with the corresponding jmp_buf argument.