--%>
Assignment Help - homework help

Use of setjmp and longjmp

Use of setjmp() and longjmp(): In C/C++, setjmp() saves the contents of the registers at a particular state in the program and longjmp() will restore that state later. In this way, longjmp() “returns” to the state of the program when setjmp() was called.

In general these functions are problematic for C++ because they do not support C++ object semantics. In particular, they do not ensure the proper destructor calls and so objects may not be cleaned up properly, leaving the system in a bad state.

Using these functions may also degrade performance by preventing optimization on local variables. For C++ exception handling, try/catch constructs are recommended instead.

214_serjmp.jpg

For model checking in particular, non-hierarchical long jumps are difficult to model with modeling languages like Java. These functions need to do register restoration which requires modeling of registers and their related operations, adding considerable overhead to model-checking effort.

   Related Questions in Programming Languages

  • Q : Define Loop variable Loop variable : A

    Loop variable: A variable employed to control the operation of a loop, like a for loop. Usually, a loop variable will be provided an initial value and it is then incremented after each and every iteration till it passes or reaches a terminating value.

    		•
  • Q : Explain Increment operator Increment

    Increment operator: The operator (++) which adds one to its operand. It consists of two forms: pre-increment (++x) and post-increment (x++). In its pre-increment form, the outcome of the expression is the value of its argument subsequent to the increm

    		•
  • Q : Choices in the Choice Activity Normal 0

    Normal 0 false false

  • Q : Describe IEEE 754 IEEE 754 : The

    IEEE 754: The standard 754-1985 issued by Institute of Electrical and Electronic Engineers for the binary floating point arithmetic. It is the standard to which Java's arithmetic matches.

    		•
  • Q : What is Disk drive Disk drive : It is a

    Disk drive: It is a hardware device employed to store the data. They come in numerous forms, like floppy disks, compact disks, and hard disks.

    		•
  • Q : Windows Communication Foundation or WCF

    Why did Microsoft develop the Windows Communication Foundation (WCF) technology?

    		•
  • Q : What is Factory pattern Factory pattern

    Factory pattern: A pattern of class definition which is employed as a generator of instances of other classes. Frequently employed to form platform- or locale-particular implementations of abstract classes or interfaces. This decreases coupling betwee

    		•
  • Q : State Default label Default label : The

    Default label: The destination for all values employed in a switch statement expression which do not contain explicit case labels. The default label is not obligatory.

    		•
  • Q : What is Bounded repetition Bounded

    Bounded repetition: The Repetition where statements within a loop's body are executed a fixed number of times and the number of times is established whenever the loop began. There is no control structure in Java which guarantees the bounded repetition

    		•
  • Q : Define Hardware Hardware : It is the

    Hardware: It is the physical devices of a computer system, like its micro-chips, keyboard, disk drives, printer, sound card, and so forth. It is termed `hardware' in contrary to programs, which are termed `software'.

    		•