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1 // Copyright 2015 The Go Authors. All rights reserved.
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2 // Use of this source code is governed by a BSD-style
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3 // license that can be found in the LICENSE file.
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4
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5 // +build !windows
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6
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7 #include <signal.h>
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8 #include <stdlib.h>
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9 #include <pthread.h>
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10 #include <stdio.h>
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11 #include <unistd.h>
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12
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13 extern void IntoGoAndBack();
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14
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15 int CheckBlocked() {
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16 sigset_t mask;
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17 sigprocmask(SIG_BLOCK, NULL, &mask);
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18 return sigismember(&mask, SIGIO);
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19 }
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20
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21 static void* sigthreadfunc(void* unused) {
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22 sigset_t mask;
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23 sigemptyset(&mask);
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24 sigaddset(&mask, SIGIO);
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25 sigprocmask(SIG_BLOCK, &mask, NULL);
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26 IntoGoAndBack();
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27 return NULL;
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28 }
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29
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30 int RunSigThread() {
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31 pthread_t thread;
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32 int r;
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33
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34 r = pthread_create(&thread, NULL, &sigthreadfunc, NULL);
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35 if (r != 0)
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36 return r;
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37 return pthread_join(thread, NULL);
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38 }
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