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https://github.com/golang/go
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f03ee913e2
This is the same retry loop we use in _cgo_try_pthread_create in runtime/cgo. Fixes #25078 Change-Id: I7ef4d4fc7fb89cbfb674c4f93cbdd7a033dd8983 Reviewed-on: https://go-review.googlesource.com/121096 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build !windows
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <time.h>
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#include <unistd.h>
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extern void IntoGoAndBack();
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int CheckBlocked() {
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sigset_t mask;
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sigprocmask(SIG_BLOCK, NULL, &mask);
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return sigismember(&mask, SIGIO);
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}
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static void* sigthreadfunc(void* unused) {
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, SIGIO);
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sigprocmask(SIG_BLOCK, &mask, NULL);
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IntoGoAndBack();
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return NULL;
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}
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int RunSigThread() {
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int tries;
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pthread_t thread;
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int r;
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struct timespec ts;
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for (tries = 0; tries < 20; tries++) {
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r = pthread_create(&thread, NULL, &sigthreadfunc, NULL);
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if (r == 0) {
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return pthread_join(thread, NULL);
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}
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if (r != EAGAIN) {
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return r;
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}
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ts.tv_sec = 0;
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ts.tv_nsec = (tries + 1) * 1000 * 1000; // Milliseconds.
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nanosleep(&ts, NULL);
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}
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return EAGAIN;
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}
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