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// Copyright (C) 2014 The Android Open Source Project
//
// 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 "emugl/common/thread.h"
#include "emugl/common/mutex.h"
#include <gtest/gtest.h>
namespace emugl {
namespace {
// A simple thread instance that does nothing at all and exits immediately.
class EmptyThread : public ::emugl::Thread {
public:
intptr_t main() { return 42; }
};
class CountingThread : public ::emugl::Thread {
public:
class State {
public:
State() : mLock(), mCount(0) {}
~State() {}
void increment() {
mLock.lock();
mCount++;
mLock.unlock();
}
int count() const {
int ret;
mLock.lock();
ret = mCount;
mLock.unlock();
return ret;
}
private:
mutable Mutex mLock;
int mCount;
};
CountingThread(State* state) : mState(state) {}
intptr_t main() {
mState->increment();
return 0;
}
private:
State* mState;
};
} // namespace
TEST(ThreadTest, SimpleThread) {
Thread* thread = new EmptyThread();
EXPECT_TRUE(thread);
EXPECT_TRUE(thread->start());
intptr_t status;
EXPECT_TRUE(thread->wait(&status));
EXPECT_EQ(42, status);
}
TEST(ThreadTest, MultipleThreads) {
CountingThread::State state;
const size_t kMaxThreads = 100;
Thread* threads[kMaxThreads];
// Create all threads.
for (size_t n = 0; n < kMaxThreads; ++n) {
threads[n] = new CountingThread(&state);
EXPECT_TRUE(threads[n]) << "thread " << n;
}
// Start them all.
for (size_t n = 0; n < kMaxThreads; ++n) {
EXPECT_TRUE(threads[n]->start()) << "thread " << n;
}
// Wait for them all.
for (size_t n = 0; n < kMaxThreads; ++n) {
EXPECT_TRUE(threads[n]->wait(NULL)) << "thread " << n;
}
// Check state.
EXPECT_EQ((int)kMaxThreads, state.count());
// Delete them all.
for (size_t n = 0; n < kMaxThreads; ++n) {
delete threads[n];
}
}
} // namespace emugl
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