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