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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !windows
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <pthread.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
extern void IntoGoAndBack();
int CheckBlocked() {
sigset_t mask;
sigprocmask(SIG_BLOCK, NULL, &mask);
return sigismember(&mask, SIGIO);
}
static void* sigthreadfunc(void* unused) {
sigset_t mask;
sigemptyset(&mask);
sigaddset(&mask, SIGIO);
sigprocmask(SIG_BLOCK, &mask, NULL);
IntoGoAndBack();
return NULL;
}
int RunSigThread() {
int tries;
pthread_t thread;
int r;
struct timespec ts;
for (tries = 0; tries < 20; tries++) {
r = pthread_create(&thread, NULL, &sigthreadfunc, NULL);
if (r == 0) {
return pthread_join(thread, NULL);
}
if (r != EAGAIN) {
return r;
}
ts.tv_sec = 0;
ts.tv_nsec = (tries + 1) * 1000 * 1000; // Milliseconds.
nanosleep(&ts, NULL);
}
return EAGAIN;
}
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