/*lsp sigset()함수 예제 315p~316p*/
/*ssu_sigset.c*/
/*20162468 박다은*/

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/time.h> //gettimeofday

int main()
{
    struct timeval A, B, C; //시간을 비교할 값들
    gettimeofday(&A, NULL);
    //=======================================

    sigset_t set;

    sigemptyset(&set);
    sigaddset(&set, SIGINT); //SIGINT만 1임

    switch(sigismember(&set, SIGINT))
    {
        case 1 :
            printf("SIGINT is included.\n"); //결과
            break;
        case 0 :
            printf("SIGINT is not included.\n");
            break;
        default :
            printf("failed to call sigismember()\n");
    }

    switch(sigismember(&set, SIGSYS))
    {
        case 1 :
            printf("SIGSYS is included.\n");
            break;
        case 0 :
            printf("SIGSYS is not included.\n");//결과
            break;
        default :
            printf("failed to call sigismember()\n");
    }

    //=======================================
    gettimeofday(&B, NULL);

    C.tv_sec = B.tv_sec - A.tv_sec;
    C.tv_usec = B.tv_usec - A.tv_usec;
    if(C.tv_usec < 0){
        C.tv_sec -= 1;
        C.tv_usec += 1000000;
    }
    printf("ROLLCAKE::Running Time : %ld µs\n", C.tv_sec*1000000 + C.tv_usec); //작은 프로그램이므로 마이크로초로 계산
    exit(0);
}