Restrictions

• You must invoke isetjmp before calling longjmp.

• The env integer array argument to isetjmp and longjmp must be at least 12 elements long.

• You must pass the env variable from the routine that calls isetjmp to the routine that calls longjmp, either by common or as an argument.

• longjmp attempts to clean up the stack. longjmp must be called from a lower call-level than isetjmp.

• Passing isetjmp as an argument that is a procedure name does not work.

See setjmp(3V).