Add Thread tests; get argument transfer working for all cases

test/miscellaneous/thread.cpp

@@ -0,0 +1,102 @@
+#include <mbgl/util/thread.hpp>
+#include <mbgl/util/run_loop.hpp>
+
+#include "../fixtures/util.hpp"
+
+using namespace mbgl::util;
+
+class TestObject {
+public:
+    TestObject(uv_loop_t*, std::thread::id otherTid)
+        : tid(std::this_thread::get_id()) {
+        EXPECT_NE(tid, otherTid);
+    }
+
+    void fn1(int val) {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        EXPECT_EQ(val, 1);
+    }
+
+    int fn2() {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        return 1;
+    }
+
+    void transferIn(std::unique_ptr<int> val) {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        EXPECT_EQ(*val, 1);
+    }
+
+    std::unique_ptr<int> transferOut() {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        return std::make_unique<int>(1);
+    }
+
+    std::unique_ptr<int> transferInOut(std::unique_ptr<int> val) {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        EXPECT_EQ(*val, 1);
+        return std::move(val);
+    }
+
+    void transferInShared(std::shared_ptr<int> val) {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        EXPECT_EQ(*val, 1);
+    }
+
+    std::shared_ptr<int> transferOutShared() {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        return std::make_shared<int>(1);
+    }
+
+    std::string transferString(const std::string& string) {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        EXPECT_EQ(string, "test");
+        return string;
+    }
+
+    const std::thread::id tid;
+};
+
+TEST(Thread, invoke) {
+    const std::thread::id tid = std::this_thread::get_id();
+
+    RunLoop loop(uv_default_loop());
+
+    loop.invoke([&] {
+        EXPECT_EQ(tid, std::this_thread::get_id());
+        Thread<TestObject> thread("Test", ThreadPriority::Regular, tid);
+
+        thread.invoke(&TestObject::fn1, 1);
+        thread.invokeWithResult<int>(&TestObject::fn2, [&] (int result) {
+            EXPECT_EQ(tid, std::this_thread::get_id());
+            EXPECT_EQ(result, 1);
+        });
+
+        thread.invoke(&TestObject::transferIn, std::make_unique<int>(1));
+        thread.invokeWithResult<std::unique_ptr<int>>(&TestObject::transferOut, [&] (std::unique_ptr<int> result) {
+            EXPECT_EQ(tid, std::this_thread::get_id());
+            EXPECT_EQ(*result, 1);
+        });
+
+        thread.invokeWithResult<std::unique_ptr<int>>(&TestObject::transferInOut, [&] (std::unique_ptr<int> result) {
+            EXPECT_EQ(tid, std::this_thread::get_id());
+            EXPECT_EQ(*result, 1);
+        }, std::make_unique<int>(1));
+
+        thread.invoke(&TestObject::transferInShared, std::make_shared<int>(1));
+        thread.invokeWithResult<std::shared_ptr<int>>(&TestObject::transferOutShared, [&] (std::shared_ptr<int> result) {
+            EXPECT_EQ(tid, std::this_thread::get_id());
+            EXPECT_EQ(*result, 1);
+        });
+
+        std::string test("test");
+        thread.invokeWithResult<std::string>(&TestObject::transferString, [&] (std::string result){
+            EXPECT_EQ(tid, std::this_thread::get_id());
+            EXPECT_EQ(result, "test");
+            loop.stop();
+        }, test);
+        test.clear();
+    });
+
+    uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+}