Name 

Description 

longjmp 

Header File
setjmp.h
Category
Miscellaneous Routines
Prototype
void longjmp(jmp_buf jmpb, int retval);
Description
Performs nonlocal goto.
A call to longjmp restores the task state captured by the last call to setjmp with the argument jmpb. It then returns in such a way that setjmp appears to have returned with the value retval.
A Win32 task state includes:

• Register variables
• EBX, EDI, ESI
• Stack pointer (ESP)
• Frame pointer (EBP)
• No segment registers are saved
• Flags are not saved

A task state is complete enough that setjmp and longjmp can be used to implement co-routines.
setjmp must be called before longjmp. The... more 

setjmp 

Header File
setjmp.h
Category
Miscellaneous Routines
Prototype
int setjmp(jmp_buf jmpb);
Description
Sets up for nonlocal goto.
setjmp captures the complete task state in jmpb and returns 0.
A later call to longjmp with jmpb restores the captured task state and returns in such a way that setjmp appears to have returned with the value val.
Under Win32, a task state includes:

• No segment registers are saved
• Register variables
• EBX, EDI, ESI
• Stack pointer (ESP)
• Frame pointer (EBP)
• Flags are not saved

A task state is complete enough that setjmp can be used to implement co-routines.
setjmp must be called before... more