chore: import upstream snapshot with attribution

2026-07-13 13:29:29 +08:00
commit f52cf32e56
1718 changed files with 366293 additions and 0 deletions
@@ -0,0 +1,108 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "butil/synchronization/waitable_event.h"
+
+#include "butil/compiler_specific.h"
+#include "butil/threading/platform_thread.h"
+#include "butil/time/time.h"
+#include <gtest/gtest.h>
+
+namespace butil {
+
+TEST(WaitableEventTest, ManualBasics) {
+  WaitableEvent event(true, false);
+
+  EXPECT_FALSE(event.IsSignaled());
+
+  event.Signal();
+  EXPECT_TRUE(event.IsSignaled());
+  EXPECT_TRUE(event.IsSignaled());
+
+  event.Reset();
+  EXPECT_FALSE(event.IsSignaled());
+  EXPECT_FALSE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
+
+  event.Signal();
+  event.Wait();
+  EXPECT_TRUE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
+}
+
+TEST(WaitableEventTest, AutoBasics) {
+  WaitableEvent event(false, false);
+
+  EXPECT_FALSE(event.IsSignaled());
+
+  event.Signal();
+  EXPECT_TRUE(event.IsSignaled());
+  EXPECT_FALSE(event.IsSignaled());
+
+  event.Reset();
+  EXPECT_FALSE(event.IsSignaled());
+  EXPECT_FALSE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
+
+  event.Signal();
+  event.Wait();
+  EXPECT_FALSE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
+
+  event.Signal();
+  EXPECT_TRUE(event.TimedWait(TimeDelta::FromMilliseconds(10)));
+}
+
+TEST(WaitableEventTest, WaitManyShortcut) {
+  WaitableEvent* ev[5];
+  for (unsigned i = 0; i < 5; ++i)
+    ev[i] = new WaitableEvent(false, false);
+
+  ev[3]->Signal();
+  EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 3u);
+
+  ev[3]->Signal();
+  EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 3u);
+
+  ev[4]->Signal();
+  EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 4u);
+
+  ev[0]->Signal();
+  EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 0u);
+
+  for (unsigned i = 0; i < 5; ++i)
+    delete ev[i];
+}
+
+class WaitableEventSignaler : public PlatformThread::Delegate {
+ public:
+  WaitableEventSignaler(double seconds, WaitableEvent* ev)
+      : seconds_(seconds),
+        ev_(ev) {
+  }
+
+  virtual void ThreadMain() OVERRIDE {
+    PlatformThread::Sleep(TimeDelta::FromSeconds(static_cast<int>(seconds_)));
+    ev_->Signal();
+  }
+
+ private:
+  const double seconds_;
+  WaitableEvent *const ev_;
+};
+
+TEST(WaitableEventTest, WaitMany) {
+  WaitableEvent* ev[5];
+  for (unsigned i = 0; i < 5; ++i)
+    ev[i] = new WaitableEvent(false, false);
+
+  WaitableEventSignaler signaler(0.1, ev[2]);
+  PlatformThreadHandle thread;
+  PlatformThread::Create(0, &signaler, &thread);
+
+  EXPECT_EQ(WaitableEvent::WaitMany(ev, 5), 2u);
+
+  PlatformThread::Join(thread);
+
+  for (unsigned i = 0; i < 5; ++i)
+    delete ev[i];
+}
+
+}  // namespace butil