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-rw-r--r--xpcom/tests/gtest/TestThreadPool.cpp124
1 files changed, 124 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestThreadPool.cpp b/xpcom/tests/gtest/TestThreadPool.cpp
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+++ b/xpcom/tests/gtest/TestThreadPool.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 <stdio.h>
+#include <stdlib.h>
+#include "nsXPCOM.h"
+#include "nsXPCOMCIDInternal.h"
+#include "nsIThreadPool.h"
+#include "nsComponentManagerUtils.h"
+#include "nsCOMPtr.h"
+#include "nsIRunnable.h"
+#include "nsThreadUtils.h"
+#include "mozilla/Atomics.h"
+#include "mozilla/Monitor.h"
+#include "gtest/gtest.h"
+
+using namespace mozilla;
+
+class Task final : public nsIRunnable
+{
+public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+
+ explicit Task(int i) : mIndex(i) {}
+
+ NS_IMETHOD Run() override
+ {
+ printf("###(%d) running from thread: %p\n", mIndex, (void *) PR_GetCurrentThread());
+ int r = (int) ((float) rand() * 200 / RAND_MAX);
+ PR_Sleep(PR_MillisecondsToInterval(r));
+ printf("###(%d) exiting from thread: %p\n", mIndex, (void *) PR_GetCurrentThread());
+ ++sCount;
+ return NS_OK;
+ }
+
+ static mozilla::Atomic<int> sCount;
+
+private:
+ ~Task() {}
+
+ int mIndex;
+};
+NS_IMPL_ISUPPORTS(Task, nsIRunnable)
+
+mozilla::Atomic<int> Task::sCount;
+
+TEST(ThreadPool, Main)
+{
+ nsCOMPtr<nsIThreadPool> pool = do_CreateInstance(NS_THREADPOOL_CONTRACTID);
+ EXPECT_TRUE(pool);
+
+ for (int i = 0; i < 100; ++i) {
+ nsCOMPtr<nsIRunnable> task = new Task(i);
+ EXPECT_TRUE(task);
+
+ pool->Dispatch(task, NS_DISPATCH_NORMAL);
+ }
+
+ pool->Shutdown();
+ EXPECT_EQ(Task::sCount, 100);
+}
+
+TEST(ThreadPool, Parallelism)
+{
+ nsCOMPtr<nsIThreadPool> pool = do_CreateInstance(NS_THREADPOOL_CONTRACTID);
+ EXPECT_TRUE(pool);
+
+ // Dispatch and sleep to ensure we have an idle thread
+ nsCOMPtr<nsIRunnable> r0 = new Runnable();
+ pool->Dispatch(r0, NS_DISPATCH_SYNC);
+ PR_Sleep(PR_SecondsToInterval(2));
+
+ class Runnable1 : public Runnable {
+ public:
+ Runnable1(Monitor& aMonitor, bool& aDone)
+ : mMonitor(aMonitor), mDone(aDone) {}
+
+ NS_IMETHOD Run() override {
+ MonitorAutoLock mon(mMonitor);
+ if (!mDone) {
+ // Wait for a reasonable timeout since we don't want to block gtests
+ // forever should any regression happen.
+ mon.Wait(PR_SecondsToInterval(300));
+ }
+ EXPECT_TRUE(mDone);
+ return NS_OK;
+ }
+ private:
+ Monitor& mMonitor;
+ bool& mDone;
+ };
+
+ class Runnable2 : public Runnable {
+ public:
+ Runnable2(Monitor& aMonitor, bool& aDone)
+ : mMonitor(aMonitor), mDone(aDone) {}
+
+ NS_IMETHOD Run() override {
+ MonitorAutoLock mon(mMonitor);
+ mDone = true;
+ mon.NotifyAll();
+ return NS_OK;
+ }
+ private:
+ Monitor& mMonitor;
+ bool& mDone;
+ };
+
+ // Dispatch 2 events in a row. Since we are still within the thread limit,
+ // We should wake up the idle thread and spawn a new thread so these 2 events
+ // can run in parallel. We will time out if r1 and r2 run in sequence for r1
+ // won't finish until r2 finishes.
+ Monitor mon("ThreadPool::Parallelism");
+ bool done = false;
+ nsCOMPtr<nsIRunnable> r1 = new Runnable1(mon, done);
+ nsCOMPtr<nsIRunnable> r2 = new Runnable2(mon, done);
+ pool->Dispatch(r1, NS_DISPATCH_NORMAL);
+ pool->Dispatch(r2, NS_DISPATCH_NORMAL);
+
+ pool->Shutdown();
+}