libASSA Programmer's Manual
<<< PreviousChapter 4. Class ReferenceNext >>>

4.13. SigSet Class

SigSet class implements a wrapper around POSIX.1 sigset_t structure, providing all manipulators on this structure as well.

4.13.1. DEFINITION


class SigSet
{
public:
    SigSet();
    SigSet(sigset_t* source_);
    ~SigSet();

    int empty (void);
    int fill(void);

    int add(int signo_);
    int del(int signo_);

    int is_member(int signo_);
    operator sigset_t *();
};

4.13.2. USAGE

The Conversion operator that converts SigSet to a pointer to the internal sigset_t data member for direct use with "C" library functions can be used as: 


SigSet  source;
sigset_t*  targetp;
     
targetp = source;

Because lvalue is expected to be sigset_t*, and there is a conversion operator defined for SigSet, the conversion happens automatically.

Another example would be to use it in conjunction with struct sigaction: 


void foo ()
{
    struct sigaction action;
    SigSet signals_to_block;
     
    // manipulate signal set in some meaningful way
     
    action.sa_mask = *signals_to_block;
}
<<< PreviousHomeNext >>>
SigHandlers ClassUpSingleton Class