Extract SleepSafe from test_util

Allows socket tests that rely on test_util to compile on Fuchsia.

PiperOrigin-RevId: 249884084
Change-Id: I17617e3f1baaba4c85c689f40db4a42a8de1597e

1 files changed, 41 insertions, 0 deletions

diff --git a/test/util/time_util.cc b/test/util/time_util.cc
new file mode 100644
index 000000000..1ddfbfc9c
--- /dev/null
+++ b/test/util/time_util.cc
@@ -0,0 +1,41 @@
+// Copyright 2019 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "test/util/time_util.h"
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#include "absl/time/time.h"
+
+namespace gvisor {
+namespace testing {
+
+void SleepSafe(absl::Duration duration) {
+  if (duration == absl::ZeroDuration()) {
+    return;
+  }
+
+  struct timespec ts = absl::ToTimespec(duration);
+  int ret;
+  while (1) {
+    ret = syscall(__NR_nanosleep, &ts, &ts);
+    if (ret == 0 || (ret <= 0 && errno != EINTR)) {
+      break;
+    }
+  }
+}
+
+}  // namespace testing
+}  // namespace gvisor