--%>
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 : Level-triggering interrupt Normal 0

    Normal 0 false false

  • Q : What are Relational operators

    Relational operators: Operators, like <, >, <=, >=, == and!=, which produce a Boolean outcome, as portion of a Boolean expression.

    		•
  • Q : Problem on Planar scintigraphy Let

    Let assume seven PMTs situated around the origin of the x-y coordinates on the face of the Anger camera as illustrated in the figure. The size of the PMTs is 2mm by 2 mm and each PMT has been allocated a number. The single scintillation event yields a response from PM

    		•
  • Q : Write programme to find value using

    		•
  • Q : Explain Try statement Try statement :

    Try statement: The try statement performs as an exception handler - a position where exception objects are caught and dealt with. In its most common form, it comprises of a try clause, one or more catch clauses and the finally clause.

    		•
  • Q : What is Universal Character Set or UTF

    UTF: Universal Character Set (abbreviated as UCS) Transformation Format. The format for symbolizing multibyte characters which is compatible with programs and file systems which were only made to handle single byte characters.

    		•
  • Q : Define Encapsulation Encapsulation :

    Encapsulation: Safeguarding the state of objects by stating its attributes as private and channeling entrance to them via accessor and mutator techniques.

    		•
  • Q : State the term tombstone lifetime

    State the term tombstone lifetime attribute?

    		•
  • Q : What is Behavior Behavior : It is the

    Behavior: It is the methods of a class which implement its behavior. A particular object's behavior is a mixture of the method definitions of its class and the present state of the object.

    		•
  • Q : Define White space White space :

    White space: Characters employed to make visual spacing in a program. White spaces comprise space, tab, carriage return and the line feed characters.

    		•