Add //mojo/edk/platform/thread_utils.* containing "yield" and "sleep".

mojo/edk/system/simple_dispatcher_unittest.cc

 // Copyright 2013 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.
 
 // NOTE(vtl): Some of these tests are inherently flaky (e.g., if run on a
 // heavily-loaded system). Sorry. |test::EpsilonTimeout()| may be increased to
 // increase tolerance and reduce observed flakiness (though doing so reduces the
 // meaningfulness of the test).
 
 #include "mojo/edk/system/simple_dispatcher.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/logging.h"
-#include "mojo/edk/system/test/sleep.h"
+#include "mojo/edk/platform/thread_utils.h"
 #include "mojo/edk/system/test/stopwatch.h"
 #include "mojo/edk/system/test/timeouts.h"
 #include "mojo/edk/system/waiter.h"
 #include "mojo/edk/system/waiter_test_utils.h"
 #include "mojo/edk/util/make_unique.h"
 #include "mojo/edk/util/ref_ptr.h"
 #include "mojo/edk/util/thread_annotations.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using mojo::platform::ThreadSleep;
 using mojo::util::MakeRefCounted;
 using mojo::util::MakeUnique;
 using mojo::util::MutexLocker;
 using mojo::util::RefPtr;
 
 namespace mojo {
 namespace system {
 namespace {
 
 class MockSimpleDispatcher final : public SimpleDispatcher {
@@ skipping 320 matching lines @@
 
   // Wait for readable and becomes readable after some time.
   {
     auto d = MakeRefCounted<MockSimpleDispatcher>();
     {
       test::WaiterThread thread(d, MOJO_HANDLE_SIGNAL_READABLE,
                                 MOJO_DEADLINE_INDEFINITE, 2, &did_wait, &result,
                                 &context, &hss);
       stopwatch.Start();
       thread.Start();
-      test::Sleep(2 * test::EpsilonTimeout());
+      ThreadSleep(2 * test::EpsilonTimeout());
       d->SetSatisfiedSignals(MOJO_HANDLE_SIGNAL_READABLE);
     }  // Joins the thread.
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }
   MojoDeadline elapsed = stopwatch.Elapsed();
   EXPECT_GT(elapsed, (2 - 1) * test::EpsilonTimeout());
   EXPECT_LT(elapsed, (2 + 1) * test::EpsilonTimeout());
   EXPECT_TRUE(did_wait);
   EXPECT_EQ(MOJO_RESULT_OK, result);
   EXPECT_EQ(2u, context);
   EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE, hss.satisfied_signals);
   EXPECT_EQ(MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE,
             hss.satisfiable_signals);
 
   // Wait for readable and becomes never-readable after some time.
   {
     auto d = MakeRefCounted<MockSimpleDispatcher>();
     {
       test::WaiterThread thread(d, MOJO_HANDLE_SIGNAL_READABLE,
                                 MOJO_DEADLINE_INDEFINITE, 3, &did_wait, &result,
                                 &context, &hss);
       stopwatch.Start();
       thread.Start();
-      test::Sleep(2 * test::EpsilonTimeout());
+      ThreadSleep(2 * test::EpsilonTimeout());
       d->SetSatisfiableSignals(MOJO_HANDLE_SIGNAL_NONE);
     }  // Joins the thread.
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }
   elapsed = stopwatch.Elapsed();
   EXPECT_GT(elapsed, (2 - 1) * test::EpsilonTimeout());
   EXPECT_LT(elapsed, (2 + 1) * test::EpsilonTimeout());
   EXPECT_TRUE(did_wait);
   EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result);
   EXPECT_EQ(3u, context);
   EXPECT_EQ(0u, hss.satisfied_signals);
   EXPECT_EQ(0u, hss.satisfiable_signals);
 
   // Wait for readable and dispatcher gets closed.
   {
     auto d = MakeRefCounted<MockSimpleDispatcher>();
     test::WaiterThread thread(d, MOJO_HANDLE_SIGNAL_READABLE,
                               MOJO_DEADLINE_INDEFINITE, 4, &did_wait, &result,
                               &context, &hss);
     stopwatch.Start();
     thread.Start();
-    test::Sleep(2 * test::EpsilonTimeout());
+    ThreadSleep(2 * test::EpsilonTimeout());
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }  // Joins the thread.
   elapsed = stopwatch.Elapsed();
   EXPECT_GT(elapsed, (2 - 1) * test::EpsilonTimeout());
   EXPECT_LT(elapsed, (2 + 1) * test::EpsilonTimeout());
   EXPECT_TRUE(did_wait);
   EXPECT_EQ(MOJO_RESULT_CANCELLED, result);
   EXPECT_EQ(4u, context);
   EXPECT_EQ(0u, hss.satisfied_signals);
   EXPECT_EQ(0u, hss.satisfiable_signals);
 
   // Wait for readable and times out.
   {
     auto d = MakeRefCounted<MockSimpleDispatcher>();
     {
       test::WaiterThread thread(d, MOJO_HANDLE_SIGNAL_READABLE,
                                 2 * test::EpsilonTimeout(), 5, &did_wait,
                                 &result, &context, &hss);
       stopwatch.Start();
       thread.Start();
-      test::Sleep(1 * test::EpsilonTimeout());
+      ThreadSleep(1 * test::EpsilonTimeout());
       // Not what we're waiting for.
       d->SetSatisfiedSignals(MOJO_HANDLE_SIGNAL_WRITABLE);
     }  // Joins the thread (after its wait times out).
     // If we closed earlier, then probably we'd get a |MOJO_RESULT_CANCELLED|.
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }
   elapsed = stopwatch.Elapsed();
   EXPECT_GT(elapsed, (2 - 1) * test::EpsilonTimeout());
   EXPECT_LT(elapsed, (2 + 1) * test::EpsilonTimeout());
   EXPECT_TRUE(did_wait);
@@ skipping 14 matching lines @@
   // All wait for readable and becomes readable after some time.
   {
     auto d = MakeRefCounted<MockSimpleDispatcher>();
     std::vector<std::unique_ptr<test::WaiterThread>> threads;
     for (uint32_t i = 0; i < kNumWaiters; i++) {
       threads.push_back(MakeUnique<test::WaiterThread>(
           d, MOJO_HANDLE_SIGNAL_READABLE, MOJO_DEADLINE_INDEFINITE, i,
           &did_wait[i], &result[i], &context[i], &hss[i]));
       threads.back()->Start();
     }
-    test::Sleep(2 * test::EpsilonTimeout());
+    ThreadSleep(2 * test::EpsilonTimeout());
     d->SetSatisfiedSignals(MOJO_HANDLE_SIGNAL_READABLE);
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }  // Joins the threads.
   for (uint32_t i = 0; i < kNumWaiters; i++) {
     EXPECT_TRUE(did_wait[i]) << i;
     EXPECT_EQ(MOJO_RESULT_OK, result[i]) << i;
     EXPECT_EQ(i, context[i]) << i;
     // Since we closed before joining, we can't say much about what each thread
     // saw as the state.
   }
 
   // Some wait for readable, some for writable, and becomes readable after some
   // time.
   {
     auto d = MakeRefCounted<MockSimpleDispatcher>();
     std::vector<std::unique_ptr<test::WaiterThread>> threads;
     for (uint32_t i = 0; i < kNumWaiters / 2; i++) {
       threads.push_back(MakeUnique<test::WaiterThread>(
           d, MOJO_HANDLE_SIGNAL_READABLE, MOJO_DEADLINE_INDEFINITE, i,
           &did_wait[i], &result[i], &context[i], &hss[i]));
       threads.back()->Start();
     }
     for (uint32_t i = kNumWaiters / 2; i < kNumWaiters; i++) {
       threads.push_back(MakeUnique<test::WaiterThread>(
           d, MOJO_HANDLE_SIGNAL_WRITABLE, MOJO_DEADLINE_INDEFINITE, i,
           &did_wait[i], &result[i], &context[i], &hss[i]));
       threads.back()->Start();
     }
-    test::Sleep(2 * test::EpsilonTimeout());
+    ThreadSleep(2 * test::EpsilonTimeout());
     d->SetSatisfiedSignals(MOJO_HANDLE_SIGNAL_READABLE);
     // This will wake up the ones waiting to write.
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }  // Joins the threads.
   for (uint32_t i = 0; i < kNumWaiters / 2; i++) {
     EXPECT_TRUE(did_wait[i]) << i;
     EXPECT_EQ(MOJO_RESULT_OK, result[i]) << i;
     EXPECT_EQ(i, context[i]) << i;
     // Since we closed before joining, we can't say much about what each thread
     // saw as the state.
@@ skipping 16 matching lines @@
           d, MOJO_HANDLE_SIGNAL_READABLE, MOJO_DEADLINE_INDEFINITE, i,
           &did_wait[i], &result[i], &context[i], &hss[i]));
       threads.back()->Start();
     }
     for (uint32_t i = kNumWaiters / 2; i < kNumWaiters; i++) {
       threads.push_back(MakeUnique<test::WaiterThread>(
           d, MOJO_HANDLE_SIGNAL_WRITABLE, MOJO_DEADLINE_INDEFINITE, i,
           &did_wait[i], &result[i], &context[i], &hss[i]));
       threads.back()->Start();
     }
-    test::Sleep(1 * test::EpsilonTimeout());
+    ThreadSleep(1 * test::EpsilonTimeout());
     d->SetSatisfiableSignals(MOJO_HANDLE_SIGNAL_READABLE);
-    test::Sleep(1 * test::EpsilonTimeout());
+    ThreadSleep(1 * test::EpsilonTimeout());
     d->SetSatisfiedSignals(MOJO_HANDLE_SIGNAL_READABLE);
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }  // Joins the threads.
   for (uint32_t i = 0; i < kNumWaiters / 2; i++) {
     EXPECT_TRUE(did_wait[i]) << i;
     EXPECT_EQ(MOJO_RESULT_OK, result[i]) << i;
     EXPECT_EQ(i, context[i]) << i;
     // Since we closed before joining, we can't say much about what each thread
     // saw as the state.
   }
@@ skipping 15 matching lines @@
           d, MOJO_HANDLE_SIGNAL_READABLE, 3 * test::EpsilonTimeout(), i,
           &did_wait[i], &result[i], &context[i], &hss[i]));
       threads.back()->Start();
     }
     for (uint32_t i = kNumWaiters / 2; i < kNumWaiters; i++) {
       threads.push_back(MakeUnique<test::WaiterThread>(
           d, MOJO_HANDLE_SIGNAL_WRITABLE, 1 * test::EpsilonTimeout(), i,
           &did_wait[i], &result[i], &context[i], &hss[i]));
       threads.back()->Start();
     }
-    test::Sleep(2 * test::EpsilonTimeout());
+    ThreadSleep(2 * test::EpsilonTimeout());
     d->SetSatisfiedSignals(MOJO_HANDLE_SIGNAL_READABLE);
     // All those waiting for writable should have timed out.
     EXPECT_EQ(MOJO_RESULT_OK, d->Close());
   }  // Joins the threads.
   for (uint32_t i = 0; i < kNumWaiters / 2; i++) {
     EXPECT_TRUE(did_wait[i]) << i;
     EXPECT_EQ(MOJO_RESULT_OK, result[i]) << i;
     EXPECT_EQ(i, context[i]) << i;
     // Since we closed before joining, we can't say much about what each thread
     // saw as the state.
   }
   for (uint32_t i = kNumWaiters / 2; i < kNumWaiters; i++) {
     EXPECT_TRUE(did_wait[i]) << i;
     EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, result[i]) << i;
     // Since we closed before joining, we can't say much about what each thread
     // saw as the state.
   }
 }
 
 // TODO(vtl): Stress test?
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo