64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/*
|
|
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>
|
|
#include <stdio.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");
|
|
if (sigaction(SIGEND, &sigAct, NULL) == -1)
|
|
printSystemError("sigaction() -- ERROR");
|
|
}
|
|
|
|
void blockSignal() {
|
|
sigset_t blockedSet = {{0}};
|
|
if (sigemptyset(&blockedSet) < 0)
|
|
printSystemError("sigaction() -- ERROR");
|
|
if (sigaddset(&blockedSet, SIGSTART) < 0)
|
|
printSystemError("sigaddset() -- ERROR");
|
|
if (sigaddset(&blockedSet, SIGEND) < 0)
|
|
printSystemError("sigaddset() -- ERROR");
|
|
if (sigprocmask(SIG_SETMASK, &blockedSet, NULL) < 0)
|
|
printSystemError("sigprocmask() -- ERROR");
|
|
}
|
|
|
|
void waitForSignal() {
|
|
sigset_t set;
|
|
if (sigemptyset(&set) < 0)
|
|
printSystemError("sigemptyset() -- ERROR");
|
|
sigpending(&set);
|
|
if (sigismember(&set, SIGEND)) {
|
|
return;
|
|
}
|
|
if (sigaddset(&set, SIGEND) < 0)
|
|
printSystemError("sigaddset() -- ERROR");
|
|
int temp;
|
|
if (sigwait(&set, &temp) != 0)
|
|
printError("sigwait() -- ERROR");
|
|
}
|
|
|
|
void sendSignal(int pid, int sig) {
|
|
union sigval value = {0};
|
|
if (sigqueue(pid, sig, value) < 0)
|
|
printSystemError("sigqueue() -- ERROR");
|
|
}
|
|
|
|
void sendStartSignal(int pid) {
|
|
sendSignal(pid, SIGSTART);
|
|
}
|
|
|
|
void sendFinishSignal(int pid) {
|
|
sendSignal(pid, SIGEND);
|
|
}
|