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Issue 2101163002: Reland Mojo-based waiting for IPC::SyncChannel (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: rebase Created 4 years, 5 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "ipc/ipc_sync_message.h" 5 #include "ipc/ipc_sync_message.h"
6 6
7 #include <stdint.h> 7 #include <stdint.h>
8 8
9 #include <stack> 9 #include <stack>
10 10
11 #include "base/atomic_sequence_num.h" 11 #include "base/atomic_sequence_num.h"
12 #include "base/lazy_instance.h"
13 #include "base/logging.h" 12 #include "base/logging.h"
14 #include "base/synchronization/waitable_event.h"
15 #include "build/build_config.h" 13 #include "build/build_config.h"
16 14
17 namespace { 15 namespace {
18 16
19 struct WaitableEventLazyInstanceTraits
20 : public base::DefaultLazyInstanceTraits<base::WaitableEvent> {
21 static base::WaitableEvent* New(void* instance) {
22 // Use placement new to initialize our instance in our preallocated space.
23 return new (instance)
24 base::WaitableEvent(base::WaitableEvent::ResetPolicy::MANUAL,
25 base::WaitableEvent::InitialState::SIGNALED);
26 }
27 };
28
29 base::LazyInstance<base::WaitableEvent, WaitableEventLazyInstanceTraits>
30 dummy_event = LAZY_INSTANCE_INITIALIZER;
31
32 base::StaticAtomicSequenceNumber g_next_id; 17 base::StaticAtomicSequenceNumber g_next_id;
33 18
34 } // namespace 19 } // namespace
35 20
36 namespace IPC { 21 namespace IPC {
37 22
38 #define kSyncMessageHeaderSize 4 23 #define kSyncMessageHeaderSize 4
39 24
40 SyncMessage::SyncMessage(int32_t routing_id, 25 SyncMessage::SyncMessage(int32_t routing_id,
41 uint32_t type, 26 uint32_t type,
42 PriorityValue priority, 27 PriorityValue priority,
43 MessageReplyDeserializer* deserializer) 28 MessageReplyDeserializer* deserializer)
44 : Message(routing_id, type, priority), 29 : Message(routing_id, type, priority),
45 deserializer_(deserializer), 30 deserializer_(deserializer) {
46 pump_messages_event_(NULL) {
47 set_sync(); 31 set_sync();
48 set_unblock(true); 32 set_unblock(true);
49 33
50 // Add synchronous message data before the message payload. 34 // Add synchronous message data before the message payload.
51 SyncHeader header; 35 SyncHeader header;
52 header.message_id = g_next_id.GetNext(); 36 header.message_id = g_next_id.GetNext();
53 WriteSyncHeader(this, header); 37 WriteSyncHeader(this, header);
54 } 38 }
55 39
56 SyncMessage::~SyncMessage() { 40 SyncMessage::~SyncMessage() {
57 } 41 }
58 42
59 MessageReplyDeserializer* SyncMessage::GetReplyDeserializer() { 43 MessageReplyDeserializer* SyncMessage::GetReplyDeserializer() {
60 DCHECK(deserializer_.get()); 44 DCHECK(deserializer_.get());
61 return deserializer_.release(); 45 return deserializer_.release();
62 } 46 }
63 47
64 void SyncMessage::EnableMessagePumping() {
65 DCHECK(!pump_messages_event_);
66 set_pump_messages_event(dummy_event.Pointer());
67 }
68
69 bool SyncMessage::IsMessageReplyTo(const Message& msg, int request_id) { 48 bool SyncMessage::IsMessageReplyTo(const Message& msg, int request_id) {
70 if (!msg.is_reply()) 49 if (!msg.is_reply())
71 return false; 50 return false;
72 51
73 return GetMessageId(msg) == request_id; 52 return GetMessageId(msg) == request_id;
74 } 53 }
75 54
76 base::PickleIterator SyncMessage::GetDataIterator(const Message* msg) { 55 base::PickleIterator SyncMessage::GetDataIterator(const Message* msg) {
77 base::PickleIterator iter(*msg); 56 base::PickleIterator iter(*msg);
78 if (!iter.SkipBytes(kSyncMessageHeaderSize)) 57 if (!iter.SkipBytes(kSyncMessageHeaderSize))
(...skipping 56 matching lines...) Expand 10 before | Expand all | Expand 10 after
135 114
136 return true; 115 return true;
137 } 116 }
138 117
139 118
140 bool MessageReplyDeserializer::SerializeOutputParameters(const Message& msg) { 119 bool MessageReplyDeserializer::SerializeOutputParameters(const Message& msg) {
141 return SerializeOutputParameters(msg, SyncMessage::GetDataIterator(&msg)); 120 return SerializeOutputParameters(msg, SyncMessage::GetDataIterator(&msg));
142 } 121 }
143 122
144 } // namespace IPC 123 } // namespace IPC
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