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Side by Side Diff: mojo/system/waiter_test_utils.h

Issue 621153003: Move mojo edk into mojo/edk (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: fix checkdeps Created 6 years, 2 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef MOJO_SYSTEM_WAITER_TEST_UTILS_H_
6 #define MOJO_SYSTEM_WAITER_TEST_UTILS_H_
7
8 #include <stdint.h>
9
10 #include "base/compiler_specific.h"
11 #include "base/macros.h"
12 #include "base/memory/ref_counted.h"
13 #include "base/threading/simple_thread.h"
14 #include "mojo/public/c/system/types.h"
15 #include "mojo/system/dispatcher.h"
16 #include "mojo/system/handle_signals_state.h"
17 #include "mojo/system/waiter.h"
18
19 namespace mojo {
20 namespace system {
21 namespace test {
22
23 // This is a very simple thread that has a |Waiter|, on which it waits
24 // indefinitely (and records the result). It will create and initialize the
25 // |Waiter| on creation, but the caller must start the thread with |Start()|. It
26 // will join the thread on destruction.
27 //
28 // One usually uses it like:
29 //
30 // MojoResult result;
31 // {
32 // WaiterList waiter_list;
33 // test::SimpleWaiterThread thread(&result);
34 // waiter_list.AddWaiter(thread.waiter(), ...);
35 // thread.Start();
36 // ... some stuff to wake the waiter ...
37 // waiter_list.RemoveWaiter(thread.waiter());
38 // } // Join |thread|.
39 // EXPECT_EQ(..., result);
40 //
41 // There's a bit of unrealism in its use: In this sort of usage, calls such as
42 // |Waiter::Init()|, |AddWaiter()|, and |RemoveWaiter()| are done in the main
43 // (test) thread, not the waiter thread (as would actually happen in real code).
44 // (We accept this unrealism for simplicity, since |WaiterList| is
45 // thread-unsafe so making it more realistic would require adding nontrivial
46 // synchronization machinery.)
47 class SimpleWaiterThread : public base::SimpleThread {
48 public:
49 // For the duration of the lifetime of this object, |*result| belongs to it
50 // (in the sense that it will write to it whenever it wants).
51 SimpleWaiterThread(MojoResult* result, uint32_t* context);
52 virtual ~SimpleWaiterThread(); // Joins the thread.
53
54 Waiter* waiter() { return &waiter_; }
55
56 private:
57 virtual void Run() override;
58
59 MojoResult* const result_;
60 uint32_t* const context_;
61 Waiter waiter_;
62
63 DISALLOW_COPY_AND_ASSIGN(SimpleWaiterThread);
64 };
65
66 // This is a more complex and realistic thread that has a |Waiter|, on which it
67 // waits for the given deadline (with the given flags). Unlike
68 // |SimpleWaiterThread|, it requires the machinery of |Dispatcher|.
69 class WaiterThread : public base::SimpleThread {
70 public:
71 // Note: |*did_wait_out|, |*result_out|, |*context_out| and
72 // |*signals_state_out| "belong" to this object (i.e., may be modified by, on
73 // some other thread) while it's alive.
74 WaiterThread(scoped_refptr<Dispatcher> dispatcher,
75 MojoHandleSignals handle_signals,
76 MojoDeadline deadline,
77 uint32_t context,
78 bool* did_wait_out,
79 MojoResult* result_out,
80 uint32_t* context_out,
81 HandleSignalsState* signals_state_out);
82 virtual ~WaiterThread();
83
84 private:
85 virtual void Run() override;
86
87 const scoped_refptr<Dispatcher> dispatcher_;
88 const MojoHandleSignals handle_signals_;
89 const MojoDeadline deadline_;
90 const uint32_t context_;
91 bool* const did_wait_out_;
92 MojoResult* const result_out_;
93 uint32_t* const context_out_;
94 HandleSignalsState* const signals_state_out_;
95
96 Waiter waiter_;
97
98 DISALLOW_COPY_AND_ASSIGN(WaiterThread);
99 };
100
101 } // namespace test
102 } // namespace system
103 } // namespace mojo
104
105 #endif // MOJO_SYSTEM_WAITER_TEST_UTILS_H_
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