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// 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::EpsilonDeadline()| may be increased to
// increase tolerance and reduce observed flakiness (though doing so reduces the
// meaningfulness of the test).
#include "mojo/edk/system/awakable_list.h"
#include "mojo/edk/system/handle_signals_state.h"
#include "mojo/edk/system/test_utils.h"
#include "mojo/edk/system/waiter.h"
#include "mojo/edk/system/waiter_test_utils.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace mojo {
namespace edk {
namespace {
TEST(AwakableListTest, BasicCancel) {
MojoResult result;
uintptr_t context;
// Cancel immediately after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 1);
thread.Start();
awakable_list.CancelAll();
// Double-remove okay:
awakable_list.Remove(thread.waiter());
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_CANCELLED, result);
EXPECT_EQ(1u, context);
// Cancel before after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_WRITABLE, 2);
awakable_list.CancelAll();
thread.Start();
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_CANCELLED, result);
EXPECT_EQ(2u, context);
// Cancel some time after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 3);
thread.Start();
test::Sleep(2 * test::EpsilonDeadline());
awakable_list.CancelAll();
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_CANCELLED, result);
EXPECT_EQ(3u, context);
}
TEST(AwakableListTest, BasicAwakeSatisfied) {
MojoResult result;
uintptr_t context;
// Awake immediately after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 1);
thread.Start();
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_READABLE,
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE));
awakable_list.Remove(thread.waiter());
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_OK, result);
EXPECT_EQ(1u, context);
// Awake before after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_WRITABLE, 2);
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_WRITABLE,
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE));
awakable_list.Remove(thread.waiter());
// Double-remove okay:
awakable_list.Remove(thread.waiter());
thread.Start();
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_OK, result);
EXPECT_EQ(2u, context);
// Awake some time after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 3);
thread.Start();
test::Sleep(2 * test::EpsilonDeadline());
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_READABLE,
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE));
awakable_list.Remove(thread.waiter());
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_OK, result);
EXPECT_EQ(3u, context);
}
TEST(AwakableListTest, BasicAwakeUnsatisfiable) {
MojoResult result;
uintptr_t context;
// Awake (for unsatisfiability) immediately after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 1);
thread.Start();
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_NONE, MOJO_HANDLE_SIGNAL_WRITABLE));
awakable_list.Remove(thread.waiter());
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result);
EXPECT_EQ(1u, context);
// Awake (for unsatisfiability) before after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_WRITABLE, 2);
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_READABLE, MOJO_HANDLE_SIGNAL_READABLE));
awakable_list.Remove(thread.waiter());
thread.Start();
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result);
EXPECT_EQ(2u, context);
// Awake (for unsatisfiability) some time after thread start.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread(&result, &context);
awakable_list.Add(thread.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 3);
thread.Start();
test::Sleep(2 * test::EpsilonDeadline());
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_NONE, MOJO_HANDLE_SIGNAL_WRITABLE));
awakable_list.Remove(thread.waiter());
// Double-remove okay:
awakable_list.Remove(thread.waiter());
} // Join |thread|.
EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result);
EXPECT_EQ(3u, context);
}
TEST(AwakableListTest, MultipleAwakables) {
MojoResult result1;
MojoResult result2;
MojoResult result3;
MojoResult result4;
uintptr_t context1;
uintptr_t context2;
uintptr_t context3;
uintptr_t context4;
// Cancel two awakables.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread1(&result1, &context1);
awakable_list.Add(thread1.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 1);
thread1.Start();
test::SimpleWaiterThread thread2(&result2, &context2);
awakable_list.Add(thread2.waiter(), MOJO_HANDLE_SIGNAL_WRITABLE, 2);
thread2.Start();
test::Sleep(2 * test::EpsilonDeadline());
awakable_list.CancelAll();
} // Join threads.
EXPECT_EQ(MOJO_RESULT_CANCELLED, result1);
EXPECT_EQ(1u, context1);
EXPECT_EQ(MOJO_RESULT_CANCELLED, result2);
EXPECT_EQ(2u, context2);
// Awake one awakable, cancel other.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread1(&result1, &context1);
awakable_list.Add(thread1.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 3);
thread1.Start();
test::SimpleWaiterThread thread2(&result2, &context2);
awakable_list.Add(thread2.waiter(), MOJO_HANDLE_SIGNAL_WRITABLE, 4);
thread2.Start();
test::Sleep(2 * test::EpsilonDeadline());
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_READABLE,
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE));
awakable_list.Remove(thread1.waiter());
awakable_list.CancelAll();
} // Join threads.
EXPECT_EQ(MOJO_RESULT_OK, result1);
EXPECT_EQ(3u, context1);
EXPECT_EQ(MOJO_RESULT_CANCELLED, result2);
EXPECT_EQ(4u, context2);
// Cancel one awakable, awake other for unsatisfiability.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread1(&result1, &context1);
awakable_list.Add(thread1.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 5);
thread1.Start();
test::SimpleWaiterThread thread2(&result2, &context2);
awakable_list.Add(thread2.waiter(), MOJO_HANDLE_SIGNAL_WRITABLE, 6);
thread2.Start();
test::Sleep(2 * test::EpsilonDeadline());
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_NONE, MOJO_HANDLE_SIGNAL_READABLE));
awakable_list.Remove(thread2.waiter());
awakable_list.CancelAll();
} // Join threads.
EXPECT_EQ(MOJO_RESULT_CANCELLED, result1);
EXPECT_EQ(5u, context1);
EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result2);
EXPECT_EQ(6u, context2);
// Cancel one awakable, awake other for unsatisfiability.
{
AwakableList awakable_list;
test::SimpleWaiterThread thread1(&result1, &context1);
awakable_list.Add(thread1.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 7);
thread1.Start();
test::Sleep(1 * test::EpsilonDeadline());
// Should do nothing.
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_NONE,
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE));
test::SimpleWaiterThread thread2(&result2, &context2);
awakable_list.Add(thread2.waiter(), MOJO_HANDLE_SIGNAL_WRITABLE, 8);
thread2.Start();
test::Sleep(1 * test::EpsilonDeadline());
// Awake #1.
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_READABLE,
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_WRITABLE));
awakable_list.Remove(thread1.waiter());
test::Sleep(1 * test::EpsilonDeadline());
test::SimpleWaiterThread thread3(&result3, &context3);
awakable_list.Add(thread3.waiter(), MOJO_HANDLE_SIGNAL_WRITABLE, 9);
thread3.Start();
test::SimpleWaiterThread thread4(&result4, &context4);
awakable_list.Add(thread4.waiter(), MOJO_HANDLE_SIGNAL_READABLE, 10);
thread4.Start();
test::Sleep(1 * test::EpsilonDeadline());
// Awake #2 and #3 for unsatisfiability.
awakable_list.AwakeForStateChange(HandleSignalsState(
MOJO_HANDLE_SIGNAL_NONE, MOJO_HANDLE_SIGNAL_READABLE));
awakable_list.Remove(thread2.waiter());
awakable_list.Remove(thread3.waiter());
// Cancel #4.
awakable_list.CancelAll();
} // Join threads.
EXPECT_EQ(MOJO_RESULT_OK, result1);
EXPECT_EQ(7u, context1);
EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result2);
EXPECT_EQ(8u, context2);
EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result3);
EXPECT_EQ(9u, context3);
EXPECT_EQ(MOJO_RESULT_CANCELLED, result4);
EXPECT_EQ(10u, context4);
}
class KeepAwakable : public Awakable {
public:
KeepAwakable() : awake_count(0) {}
bool Awake(MojoResult result, uintptr_t context) override {
awake_count++;
return true;
}
int awake_count;
MOJO_DISALLOW_COPY_AND_ASSIGN(KeepAwakable);
};
class RemoveAwakable : public Awakable {
public:
RemoveAwakable() : awake_count(0) {}
bool Awake(MojoResult result, uintptr_t context) override {
awake_count++;
return false;
}
int awake_count;
MOJO_DISALLOW_COPY_AND_ASSIGN(RemoveAwakable);
};
TEST(AwakableListTest, KeepAwakablesReturningTrue) {
KeepAwakable keep0;
KeepAwakable keep1;
RemoveAwakable remove0;
RemoveAwakable remove1;
RemoveAwakable remove2;
HandleSignalsState hss(MOJO_HANDLE_SIGNAL_WRITABLE,
MOJO_HANDLE_SIGNAL_WRITABLE);
AwakableList remove_all;
remove_all.Add(&remove0, MOJO_HANDLE_SIGNAL_WRITABLE, 0);
remove_all.Add(&remove1, MOJO_HANDLE_SIGNAL_WRITABLE, 0);
remove_all.AwakeForStateChange(hss);
EXPECT_EQ(remove0.awake_count, 1);
EXPECT_EQ(remove1.awake_count, 1);
remove_all.AwakeForStateChange(hss);
EXPECT_EQ(remove0.awake_count, 1);
EXPECT_EQ(remove1.awake_count, 1);
AwakableList remove_first;
remove_first.Add(&remove2, MOJO_HANDLE_SIGNAL_WRITABLE, 0);
remove_first.Add(&keep0, MOJO_HANDLE_SIGNAL_WRITABLE, 0);
remove_first.Add(&keep1, MOJO_HANDLE_SIGNAL_WRITABLE, 0);
remove_first.AwakeForStateChange(hss);
EXPECT_EQ(keep0.awake_count, 1);
EXPECT_EQ(keep1.awake_count, 1);
EXPECT_EQ(remove2.awake_count, 1);
remove_first.AwakeForStateChange(hss);
EXPECT_EQ(keep0.awake_count, 2);
EXPECT_EQ(keep1.awake_count, 2);
EXPECT_EQ(remove2.awake_count, 1);
remove_first.Remove(&keep0);
remove_first.Remove(&keep1);
}
} // namespace
} // namespace edk
} // namespace mojo
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