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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.
// Broadcast is Sunny Day tested in most of the other SbConditionVariable tests.
#include "starboard/once.h"
#include "starboard/configuration_constants.h"
#include "starboard/nplb/thread_helpers.h"
#include "starboard/thread.h"
#include "starboard/thread_types.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace starboard {
namespace nplb {
namespace {
int s_global_value;
void IncrementGlobalValue() {
++s_global_value;
}
TEST(SbOnceTest, SunnyDaySingleInit) {
SbOnceControl once_control = SB_ONCE_INITIALIZER;
s_global_value = 0;
EXPECT_TRUE(SbOnce(&once_control, &IncrementGlobalValue));
EXPECT_EQ(1, s_global_value);
}
TEST(SbOnceTest, SunnyDayMultipleInit) {
SbOnceControl once_control = SB_ONCE_INITIALIZER;
s_global_value = 0;
EXPECT_TRUE(SbOnce(&once_control, &IncrementGlobalValue));
EXPECT_EQ(1, s_global_value);
s_global_value = 0;
EXPECT_TRUE(SbOnce(&once_control, &IncrementGlobalValue));
EXPECT_EQ(0, s_global_value);
s_global_value = 0;
EXPECT_TRUE(SbOnce(&once_control, &IncrementGlobalValue));
EXPECT_EQ(0, s_global_value);
}
struct RunSbOnceContext {
RunSbOnceContext() : once_control(SB_ONCE_INITIALIZER) {
SbMutexCreate(&mutex);
SbConditionVariableCreate(&condition, &mutex);
}
~RunSbOnceContext() {
SbConditionVariableDestroy(&condition);
SbMutexDestroy(&mutex);
}
Semaphore semaphore;
SbMutex mutex;
SbConditionVariable condition;
SbOnceControl once_control;
};
void* RunSbOnceEntryPoint(void* context) {
RunSbOnceContext* run_sbonce_context =
reinterpret_cast<RunSbOnceContext*>(context);
{
SbMutexAcquire(&run_sbonce_context->mutex);
run_sbonce_context->semaphore.Put();
SbConditionVariableWait(&run_sbonce_context->condition,
&run_sbonce_context->mutex);
SbMutexRelease(&run_sbonce_context->mutex);
}
SbThreadYield();
static const int kIterationCount = 3;
for (int i = 0; i < kIterationCount; ++i) {
SbOnce(&run_sbonce_context->once_control, &IncrementGlobalValue);
}
return NULL;
}
// Here we spawn many threads each of which will call SbOnce multiple times
// using a shared SbOnceControl object. We then test that the initialization
// routine got called exactly one time.
TEST(SbOnceTest, SunnyDayMultipleThreadsInit) {
const int kMany = kSbMaxThreads;
std::vector<SbThread> threads(kMany);
const int kIterationCount = 10;
for (int i = 0; i < kIterationCount; ++i) {
SbOnceControl once_control = SB_ONCE_INITIALIZER;
RunSbOnceContext context;
s_global_value = 0;
for (int j = 0; j < kMany; ++j) {
threads[j] =
SbThreadCreate(0, kSbThreadNoPriority, kSbThreadNoAffinity, true,
kThreadName, RunSbOnceEntryPoint, &context);
}
// Wait for all threads to finish initializing and become ready, then
// broadcast the signal to begin. We do this to increase the chances that
// threads will call SbOnce() at the same time as each other.
for (int j = 0; j < kMany; ++j) {
context.semaphore.Take();
}
{
SbMutexAcquire(&context.mutex);
SbConditionVariableBroadcast(&context.condition);
SbMutexRelease(&context.mutex);
}
// Signal threads to beginWait for all threads to complete.
for (int i = 0; i < kMany; ++i) {
void* result;
SbThreadJoin(threads[i], &result);
}
EXPECT_EQ(1, s_global_value);
}
}
TEST(SbOnceTest, RainyDayBadOnceControl) {
s_global_value = 0;
EXPECT_FALSE(SbOnce(NULL, &IncrementGlobalValue));
EXPECT_EQ(0, s_global_value);
}
TEST(SbOnceTest, RainyDayBadInitRoutine) {
SbOnceControl once_control = SB_ONCE_INITIALIZER;
s_global_value = 0;
EXPECT_FALSE(SbOnce(&once_control, NULL));
EXPECT_EQ(0, s_global_value);
}
SB_ONCE_INITIALIZE_FUNCTION(int, GetIntSingleton);
TEST(SbOnceTest, InitializeOnceMacroFunction) {
int* int_singelton = GetIntSingleton();
ASSERT_TRUE(int_singelton);
EXPECT_EQ(0, *int_singelton)
<< "Singleton Macro does not default initialize.";
}
} // namespace.
} // namespace nplb.
} // namespace starboard.