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#include <mbgl/util/async_task.hpp>
#include <mbgl/util/run_loop.hpp>
#include <mbgl/util/thread.hpp>
#include <mbgl/test/util.hpp>
#include <vector>
using namespace mbgl::util;
namespace {
class TestWorker {
public:
TestWorker(AsyncTask *async_)
: async(async_) {}
void run() {
for (unsigned i = 0; i < 100000; ++i) {
async->send();
}
}
void runWithCallback(std::function<void()> cb) {
for (unsigned i = 0; i < 100000; ++i) {
async->send();
}
cb();
}
private:
AsyncTask *async;
};
} // namespace
TEST(AsyncTask, RequestCoalescing) {
RunLoop loop;
unsigned count = 0;
AsyncTask async([&count] { ++count; });
async.send();
async.send();
async.send();
async.send();
async.send();
loop.runOnce();
EXPECT_EQ(count, 1);
}
TEST(AsyncTask, DestroyShouldNotRunQueue) {
RunLoop loop;
unsigned count = 0;
auto async = std::make_unique<AsyncTask>([&count] { ++count; });
async->send();
async.reset();
EXPECT_EQ(count, 0);
}
TEST(AsyncTask, RequestCoalescingMultithreaded) {
RunLoop loop;
unsigned count = 0;
AsyncTask async([&count] { ++count; });
std::vector<std::unique_ptr<Thread<TestWorker>>> threads;
ThreadContext context = {"Test", ThreadType::Map, ThreadPriority::Regular};
unsigned numThreads = 25;
for (unsigned i = 0; i < numThreads; ++i) {
std::unique_ptr<Thread<TestWorker>> thread =
std::make_unique<Thread<TestWorker>>(context, &async);
thread->invoke(&TestWorker::run);
threads.push_back(std::move(thread));
}
// Join all the threads
threads.clear();
loop.runOnce();
EXPECT_EQ(count, 1);
}
TEST(AsyncTask, ThreadSafety) {
RunLoop loop;
unsigned count = 0;
AsyncTask async([&count] { ++count; });
unsigned numThreads = 25;
auto callback = [&] {
if (!--numThreads) {
loop.stop();
}
};
std::vector<std::unique_ptr<Thread<TestWorker>>> threads;
std::vector<std::unique_ptr<mbgl::WorkRequest>> requests;
ThreadContext context = {"Test", ThreadType::Map, ThreadPriority::Regular};
for (unsigned i = 0; i < numThreads; ++i) {
std::unique_ptr<Thread<TestWorker>> thread =
std::make_unique<Thread<TestWorker>>(context, &async);
requests.push_back(
thread->invokeWithCallback(&TestWorker::runWithCallback, callback));
threads.push_back(std::move(thread));
}
loop.run();
// We expect here more than 1 but 1 would also be
// a valid result, although very unlikely (I hope).
EXPECT_GT(count, 1);
}
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