63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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This is a personal academic project. Dear PVS-Studio, please check it.
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PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#define _POSIX_C_SOURCE 200112L
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#include "siglib.h"
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#include <signal.h>
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#include "error.h"
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#include <unistd.h>
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void addSignalHandler(void (*changeViewFlag)()) {
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struct sigaction sigAct = {{0}};
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sigAct.sa_handler = changeViewFlag;
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sigAct.sa_flags = 0;
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if (sigaction(SIGSTART, &sigAct, NULL) == -1)
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printSystemError("sigaction() -- ERROR");
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if (sigaction(SIGEND, &sigAct, NULL) == -1)
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printSystemError("sigaction() -- ERROR");
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}
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void blockSignal() {
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sigset_t blockedSet = {{0}};
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if (sigemptyset(&blockedSet) < 0)
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printSystemError("sigaction() -- ERROR");
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if (sigaddset(&blockedSet, SIGSTART) < 0)
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printSystemError("sigaddset() -- ERROR");
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if (sigaddset(&blockedSet, SIGEND) < 0)
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printSystemError("sigaddset() -- ERROR");
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if (sigprocmask(SIG_SETMASK, &blockedSet, NULL) < 0)
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printSystemError("sigprocmask() -- ERROR");
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}
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void waitForSignal() {
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sigset_t set;
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if (sigemptyset(&set) < 0)
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printSystemError("sigemptyset() -- ERROR");
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sigpending(&set);
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if (sigismember(&set, SIGEND)) {
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return;
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}
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if (sigaddset(&set, SIGEND) < 0)
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printSystemError("sigaddset() -- ERROR");
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int temp;
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if (sigwait(&set, &temp) != 0)
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printError("sigwait() -- ERROR");
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}
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void sendSignal(int pid, int sig) {
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union sigval value = {0};
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if (sigqueue(pid, sig, value) < 0)
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printSystemError("sigqueue() -- ERROR");
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}
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void sendStartSignal(int pid) {
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sendSignal(pid, SIGSTART);
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}
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void sendFinishSignal(int pid) {
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sendSignal(pid, SIGEND);
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}
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