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// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// 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 "starboard/thread.h"
#include "starboard/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace starboard {
namespace nplb {
namespace {
// Allow millisecond-level precision.
const SbTime kPrecision = kSbTimeMillisecond;
TEST(SbThreadSleepTest, SunnyDay) {
SbThreadSleep(0);
// Well, my work here is done.
}
// My strategy here is to sleep for an amount of time, and ensure that AT LEAST
// that amount of time has passed. There's really no upper bound for how late
// the thread can wake up, something I completely sympathize with.
TEST(SbThreadSleepTest, SunnyDayAtLeastDelay) {
const int kTrials = 12;
const int64_t one = 1;
for (int trial = 0; trial < kTrials; ++trial) {
// This tests several delays, between about 15 to about 4 milliseconds.
const SbTime kDelay = kSbTimeSecond / (one << ((trial % 3) + 6));
SbTimeMonotonic start = SbTimeGetMonotonicNow();
SbThreadSleep(kDelay);
SbTimeMonotonic end = SbTimeGetMonotonicNow();
EXPECT_LE(start + kDelay, end + kPrecision) << "Trial " << trial
<< ", kDelay=" << kDelay;
}
}
TEST(SbThreadSleepTest, RainyDayNegativeDuration) {
const int kTrials = 128;
for (int trial = 0; trial < kTrials; ++trial) {
SbTimeMonotonic start = SbTimeGetMonotonicNow();
SbThreadSleep(-kSbTimeSecond);
EXPECT_GT(kSbTimeSecond / 5, SbTimeGetMonotonicNow() - start) << "Trial "
<< trial;
}
}
} // namespace
} // namespace nplb
} // namespace starboard