Name
setjmp function — Establishes nonlocal label
Synopsis
int setjmp(jmp_buf env);The setjmp function stores
the current execution environment in its argument so that the
environment can be restored by a call to longjmp. The first time setjmp is called, it returns 0. When longjmp is called, setjmp returns the val argument that was passed to longjmp; that value is guaranteed to be
nonzero.
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