1 files changed, 260 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestRacingServiceManager.cpp b/xpcom/tests/gtest/TestRacingServiceManager.cpp
new file mode 100644
index 0000000000..ad6c08d97b
--- /dev/null
+++ b/xpcom/tests/gtest/TestRacingServiceManager.cpp
@@ -0,0 +1,260 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIFactory.h"
+#include "nsXULAppAPI.h"
+#include "nsIThread.h"
+
+#include "nsComponentManager.h"
+#include "nsServiceManagerUtils.h"
+#include "nsThreadUtils.h"
+#include "nsXPCOMCIDInternal.h"
+#include "pratom.h"
+#include "prmon.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/gtest/MozAssertions.h"
+
+#include "mozilla/ReentrantMonitor.h"
+
+#include "gtest/gtest.h"
+
+using namespace mozilla;
+
+/* f93f6bdc-88af-42d7-9d64-1b43c649a3e5 */
+#define FACTORY_CID1                                 \
+  {                                                  \
+    0xf93f6bdc, 0x88af, 0x42d7, {                    \
+      0x9d, 0x64, 0x1b, 0x43, 0xc6, 0x49, 0xa3, 0xe5 \
+    }                                                \
+  }
+NS_DEFINE_CID(kFactoryCID1, FACTORY_CID1);
+
+/* ef38ad65-6595-49f0-8048-e819f81d15e2 */
+#define FACTORY_CID2                                 \
+  {                                                  \
+    0xef38ad65, 0x6595, 0x49f0, {                    \
+      0x80, 0x48, 0xe8, 0x19, 0xf8, 0x1d, 0x15, 0xe2 \
+    }                                                \
+  }
+NS_DEFINE_CID(kFactoryCID2, FACTORY_CID2);
+
+#define FACTORY_CONTRACTID "TestRacingThreadManager/factory;1"
+
+namespace TestRacingServiceManager {
+int32_t gComponent1Count = 0;
+int32_t gComponent2Count = 0;
+
+ReentrantMonitor* gReentrantMonitor = nullptr;
+
+bool gCreateInstanceCalled = false;
+bool gMainThreadWaiting = false;
+
+class AutoCreateAndDestroyReentrantMonitor {
+ public:
+  explicit AutoCreateAndDestroyReentrantMonitor(
+      ReentrantMonitor** aReentrantMonitorPtr)
+      : mReentrantMonitorPtr(aReentrantMonitorPtr) {
+    *aReentrantMonitorPtr =
+        new ReentrantMonitor("TestRacingServiceManager::AutoMon");
+    MOZ_RELEASE_ASSERT(*aReentrantMonitorPtr, "Out of memory!");
+  }
+
+  ~AutoCreateAndDestroyReentrantMonitor() {
+    if (*mReentrantMonitorPtr) {
+      delete *mReentrantMonitorPtr;
+      *mReentrantMonitorPtr = nullptr;
+    }
+  }
+
+ private:
+  ReentrantMonitor** mReentrantMonitorPtr;
+};
+
+class Factory final : public nsIFactory {
+  ~Factory() = default;
+
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  Factory() : mFirstComponentCreated(false) {}
+
+  NS_IMETHOD CreateInstance(const nsIID& aIID, void** aResult) override;
+
+  bool mFirstComponentCreated;
+};
+
+NS_IMPL_ISUPPORTS(Factory, nsIFactory)
+
+class Component1 final : public nsISupports {
+  ~Component1() = default;
+
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  Component1() {
+    // This is the real test - make sure that only one instance is ever created.
+    int32_t count = PR_AtomicIncrement(&gComponent1Count);
+    MOZ_RELEASE_ASSERT(count == 1, "Too many components created!");
+  }
+};
+
+NS_IMPL_ADDREF(Component1)
+NS_IMPL_RELEASE(Component1)
+
+NS_INTERFACE_MAP_BEGIN(Component1)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+class Component2 final : public nsISupports {
+  ~Component2() = default;
+
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  Component2() {
+    // This is the real test - make sure that only one instance is ever created.
+    int32_t count = PR_AtomicIncrement(&gComponent2Count);
+    EXPECT_EQ(count, int32_t(1)) << "Too many components created!";
+  }
+};
+
+NS_IMPL_ADDREF(Component2)
+NS_IMPL_RELEASE(Component2)
+
+NS_INTERFACE_MAP_BEGIN(Component2)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMETHODIMP
+Factory::CreateInstance(const nsIID& aIID, void** aResult) {
+  // Make sure that the second thread beat the main thread to the getService
+  // call.
+  MOZ_RELEASE_ASSERT(!NS_IsMainThread(), "Wrong thread!");
+
+  {
+    ReentrantMonitorAutoEnter mon(*gReentrantMonitor);
+
+    gCreateInstanceCalled = true;
+    mon.Notify();
+
+    mon.Wait(PR_MillisecondsToInterval(3000));
+  }
+
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  nsCOMPtr<nsISupports> instance;
+
+  if (!mFirstComponentCreated) {
+    instance = new Component1();
+  } else {
+    instance = new Component2();
+  }
+  NS_ENSURE_TRUE(instance, NS_ERROR_OUT_OF_MEMORY);
+
+  nsresult rv = instance->QueryInterface(aIID, aResult);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+class TestRunnable : public Runnable {
+ public:
+  NS_DECL_NSIRUNNABLE
+
+  TestRunnable()
+      : mozilla::Runnable("TestRacingServiceManager::TestRunnable"),
+        mFirstRunnableDone(false) {}
+
+  bool mFirstRunnableDone;
+};
+
+NS_IMETHODIMP
+TestRunnable::Run() {
+  {
+    ReentrantMonitorAutoEnter mon(*gReentrantMonitor);
+
+    while (!gMainThreadWaiting) {
+      mon.Wait();
+    }
+  }
+
+  nsresult rv;
+  nsCOMPtr<nsISupports> component;
+
+  if (!mFirstRunnableDone) {
+    component = do_GetService(kFactoryCID1, &rv);
+  } else {
+    component = do_GetService(FACTORY_CONTRACTID, &rv);
+  }
+  EXPECT_TRUE(NS_SUCCEEDED(rv)) << "GetService failed!";
+
+  return NS_OK;
+}
+
+static Factory* gFactory;
+
+TEST(RacingServiceManager, Test)
+{
+  nsresult rv;
+
+  gFactory = new Factory();
+  NS_ADDREF(gFactory);
+
+  nsComponentManagerImpl::gComponentManager->RegisterFactory(
+      kFactoryCID2, "factory1", FACTORY_CONTRACTID, gFactory);
+  nsComponentManagerImpl::gComponentManager->RegisterFactory(
+      kFactoryCID1, "factory2", nullptr, gFactory);
+
+  AutoCreateAndDestroyReentrantMonitor mon1(&gReentrantMonitor);
+
+  RefPtr<TestRunnable> runnable = new TestRunnable();
+  ASSERT_TRUE(runnable);
+
+  // Run the classID test
+  nsCOMPtr<nsIThread> newThread;
+  rv = NS_NewNamedThread("RacingServMan", getter_AddRefs(newThread), runnable);
+  ASSERT_NS_SUCCEEDED(rv);
+
+  {
+    ReentrantMonitorAutoEnter mon2(*gReentrantMonitor);
+
+    gMainThreadWaiting = true;
+    mon2.Notify();
+
+    while (!gCreateInstanceCalled) {
+      mon2.Wait();
+    }
+  }
+
+  nsCOMPtr<nsISupports> component(do_GetService(kFactoryCID1, &rv));
+  ASSERT_NS_SUCCEEDED(rv);
+
+  // Reset for the contractID test
+  gMainThreadWaiting = gCreateInstanceCalled = false;
+  gFactory->mFirstComponentCreated = runnable->mFirstRunnableDone = true;
+  component = nullptr;
+
+  rv = newThread->Dispatch(runnable, NS_DISPATCH_NORMAL);
+  ASSERT_NS_SUCCEEDED(rv);
+
+  {
+    ReentrantMonitorAutoEnter mon3(*gReentrantMonitor);
+
+    gMainThreadWaiting = true;
+    mon3.Notify();
+
+    while (!gCreateInstanceCalled) {
+      mon3.Wait();
+    }
+  }
+
+  component = do_GetService(FACTORY_CONTRACTID, &rv);
+  ASSERT_NS_SUCCEEDED(rv);
+
+  NS_RELEASE(gFactory);
+}
+
+}  // namespace TestRacingServiceManager