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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/nplb/thread_helpers.h"
#include "starboard/thread.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace starboard {
namespace nplb {
namespace {
TEST(SbConditionVariableWaitTest, SunnyDayAutoInit) {
TakeThenSignalContext context = {TestSemaphore(0), SB_MUTEX_INITIALIZER,
SB_CONDITION_VARIABLE_INITIALIZER};
// Start the thread.
SbThread thread =
SbThreadCreate(0, kSbThreadNoPriority, kSbThreadNoAffinity, true, NULL,
TakeThenSignalEntryPoint, &context);
EXPECT_TRUE(SbMutexIsSuccess(SbMutexAcquire(&context.mutex)));
// Tell the thread to signal the condvar, which will cause it to attempt to
// acquire the mutex we are holding.
context.do_signal.Put();
// We release the mutex when we wait, allowing the thread to actually do the
// signaling, and ensuring we are waiting before it signals.
SbConditionVariableResult result =
SbConditionVariableWait(&context.condition, &context.mutex);
EXPECT_EQ(kSbConditionVariableSignaled, result);
EXPECT_TRUE(SbMutexRelease(&context.mutex));
// Now we wait for the thread to exit.
EXPECT_TRUE(SbThreadJoin(thread, NULL));
EXPECT_TRUE(SbConditionVariableDestroy(&context.condition));
EXPECT_TRUE(SbMutexDestroy(&context.mutex));
}
TEST(SbConditionVariableWaitTest, SunnyDay) {
const int kMany = SB_MAX_THREADS > 64 ? 64 : SB_MAX_THREADS;
WaiterContext context;
SbThread threads[kMany];
for (int i = 0; i < kMany; ++i) {
threads[i] = SbThreadCreate(0, kSbThreadNoPriority, kSbThreadNoAffinity,
true, NULL, WaiterEntryPoint, &context);
}
for (int i = 0; i < kMany; ++i) {
context.WaitForReturnSignal();
}
// Signal the conditions to make the thread wake up and exit.
EXPECT_TRUE(SbConditionVariableBroadcast(&context.condition));
// Now we wait for the threads to exit.
for (int i = 0; i < kMany; ++i) {
EXPECT_TRUE(SbThreadJoin(threads[i], NULL)) << "thread = " << threads[i];
}
}
TEST(SbConditionVariableWaitTest, RainyDayNull) {
SbConditionVariableResult result = SbConditionVariableWait(NULL, NULL);
EXPECT_EQ(kSbConditionVariableFailed, result);
SbMutex mutex = SB_MUTEX_INITIALIZER;
result = SbConditionVariableWait(NULL, &mutex);
EXPECT_EQ(kSbConditionVariableFailed, result);
SbConditionVariable condition = SB_CONDITION_VARIABLE_INITIALIZER;
result = SbConditionVariableWait(&condition, NULL);
EXPECT_EQ(kSbConditionVariableFailed, result);
}
} // namespace
} // namespace nplb
} // namespace starboard