[tests] Add utests for ThreadLocal

test/miscellaneous/thread_local.cpp

@@ -0,0 +1,95 @@
+#include <mbgl/util/run_loop.hpp>
+#include <mbgl/util/thread.hpp>
+#include <mbgl/util/thread_local.hpp>
+
+#include "../fixtures/util.hpp"
+
+using namespace mbgl::util;
+
+namespace {
+
+class TestThread {
+public:
+    TestThread(int *number_) {
+        number.set(number_);
+    }
+
+    ~TestThread() {
+        number.set(nullptr);
+    }
+
+    int getNumber() {
+        return *number.get();
+    }
+
+private:
+    static ThreadLocal<int> number;
+};
+
+ThreadLocal<int> TestThread::number;
+
+}
+
+TEST(ThreadLocalStorage, Basic) {
+    RunLoop loop;
+
+    int number1 = 1;
+    int number2 = 2;
+    int number3 = 3;
+
+    ThreadContext context = {"Test", ThreadType::Map, ThreadPriority::Regular};
+
+    Thread<TestThread> thread1(context, &number1);
+    Thread<TestThread> thread2(context, &number2);
+    Thread<TestThread> thread3(context, &number3);
+
+    EXPECT_EQ(number1, thread1.invokeSync<int>(&TestThread::getNumber));
+    EXPECT_EQ(number2, thread2.invokeSync<int>(&TestThread::getNumber));
+    EXPECT_EQ(number3, thread3.invokeSync<int>(&TestThread::getNumber));
+}
+
+TEST(ThreadLocalStorage, NotSetReturnsNull) {
+    static ThreadLocal<int> number;
+
+    EXPECT_EQ(nullptr, number.get());
+}
+
+namespace {
+
+struct DtorCounter {
+    ~DtorCounter() { ++(*value); }
+    unsigned *value;
+};
+
+class TestThreadReclaim {
+public:
+    TestThreadReclaim(DtorCounter* counter_) {
+        counter.set(counter_);
+    }
+
+private:
+    static ThreadLocal<DtorCounter> counter;
+};
+
+ThreadLocal<DtorCounter> TestThreadReclaim::counter;
+
+}
+
+TEST(ThreadLocalStorage, AutoReclaim) {
+    RunLoop loop;
+
+    unsigned counter = 0;
+
+    DtorCounter* dtorCounter1 = new DtorCounter{ &counter };
+    DtorCounter* dtorCounter2 = new DtorCounter{ &counter };
+
+    ThreadContext context = {"Test", ThreadType::Map, ThreadPriority::Regular};
+
+    auto thread1 = std::make_unique<Thread<TestThreadReclaim>>(context, dtorCounter1);
+    auto thread2 = std::make_unique<Thread<TestThreadReclaim>>(context, dtorCounter2);
+
+    thread1.reset();
+    thread2.reset();
+
+    EXPECT_EQ(counter, 2);
+}

test/test.gypi

@@ -61,6 +61,7 @@
         'miscellaneous/style_parser.cpp',
         'miscellaneous/text_conversions.cpp',
         'miscellaneous/thread.cpp',
+        'miscellaneous/thread_local.cpp',
         'miscellaneous/tile.cpp',
         'miscellaneous/timer.cpp',
         'miscellaneous/token.cpp',