/*
This is a personal academic project. Dear PVS-Studio, please check it.
PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#define _POSIX_C_SOURCE 200112L

#include "siglib.h"
#include <signal.h>
#include "error.h"
#include <unistd.h>

void addSignalHandler(void (*changeViewFlag)()) {
    struct sigaction sigAct = {{0}};
    sigAct.sa_handler = changeViewFlag;
    sigAct.sa_flags = 0;

    if (sigaction(SIGSTART, &sigAct, NULL) == -1)
        printSystemError("sigaction() -- ERROR");
}

void blockSignal() {
    sigset_t blockedSet = {{0}};
    sigaddset(&blockedSet, SIGSTART);
    sigprocmask(SIG_BLOCK, &blockedSet, NULL);
}

void waitForSignal() {
    sigset_t set;
    sigaddset(&set, SIGEND);
    int temp;
    sigwait(&set, &temp);
}

void sendSignal(int pid, int sig) {
    union sigval value = {0};
    sigqueue(pid, sig, value);
}

void sendStartSignal(int pid) {
    sendSignal(pid, SIGSTART);
}

void sendFinishSignal(int pid) {
    sendSignal(pid, SIGEND);
}