1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
// Copyright 2014 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.
#ifndef MOJO_PUBLIC_CPP_SYSTEM_DATA_PIPE_H_
#define MOJO_PUBLIC_CPP_SYSTEM_DATA_PIPE_H_
#include <assert.h>
#include "mojo/public/c/system/data_pipe.h"
#include "mojo/public/cpp/system/handle.h"
#include "mojo/public/cpp/system/macros.h"
namespace mojo {
// DataPipeProducerHandle and DataPipeConsumerHandle ---------------------------
class DataPipeProducerHandle : public Handle {
public:
DataPipeProducerHandle() {}
explicit DataPipeProducerHandle(MojoHandle value) : Handle(value) {}
// Copying and assignment allowed.
};
MOJO_COMPILE_ASSERT(sizeof(DataPipeProducerHandle) == sizeof(Handle),
bad_size_for_cpp_DataPipeProducerHandle);
typedef ScopedHandleBase<DataPipeProducerHandle> ScopedDataPipeProducerHandle;
MOJO_COMPILE_ASSERT(sizeof(ScopedDataPipeProducerHandle) ==
sizeof(DataPipeProducerHandle),
bad_size_for_cpp_ScopedDataPipeProducerHandle);
class DataPipeConsumerHandle : public Handle {
public:
DataPipeConsumerHandle() {}
explicit DataPipeConsumerHandle(MojoHandle value) : Handle(value) {}
// Copying and assignment allowed.
};
MOJO_COMPILE_ASSERT(sizeof(DataPipeConsumerHandle) == sizeof(Handle),
bad_size_for_cpp_DataPipeConsumerHandle);
typedef ScopedHandleBase<DataPipeConsumerHandle> ScopedDataPipeConsumerHandle;
MOJO_COMPILE_ASSERT(sizeof(ScopedDataPipeConsumerHandle) ==
sizeof(DataPipeConsumerHandle),
bad_size_for_cpp_ScopedDataPipeConsumerHandle);
inline MojoResult CreateDataPipe(
const MojoCreateDataPipeOptions* options,
ScopedDataPipeProducerHandle* data_pipe_producer,
ScopedDataPipeConsumerHandle* data_pipe_consumer) {
assert(data_pipe_producer);
assert(data_pipe_consumer);
DataPipeProducerHandle producer_handle;
DataPipeConsumerHandle consumer_handle;
MojoResult rv = MojoCreateDataPipe(options, producer_handle.mutable_value(),
consumer_handle.mutable_value());
// Reset even on failure (reduces the chances that a "stale"/incorrect handle
// will be used).
data_pipe_producer->reset(producer_handle);
data_pipe_consumer->reset(consumer_handle);
return rv;
}
inline MojoResult WriteDataRaw(DataPipeProducerHandle data_pipe_producer,
const void* elements,
uint32_t* num_bytes,
MojoWriteDataFlags flags) {
return MojoWriteData(data_pipe_producer.value(), elements, num_bytes, flags);
}
inline MojoResult BeginWriteDataRaw(DataPipeProducerHandle data_pipe_producer,
void** buffer,
uint32_t* buffer_num_bytes,
MojoWriteDataFlags flags) {
return MojoBeginWriteData(data_pipe_producer.value(), buffer,
buffer_num_bytes, flags);
}
inline MojoResult EndWriteDataRaw(DataPipeProducerHandle data_pipe_producer,
uint32_t num_bytes_written) {
return MojoEndWriteData(data_pipe_producer.value(), num_bytes_written);
}
inline MojoResult ReadDataRaw(DataPipeConsumerHandle data_pipe_consumer,
void* elements,
uint32_t* num_bytes,
MojoReadDataFlags flags) {
return MojoReadData(data_pipe_consumer.value(), elements, num_bytes, flags);
}
inline MojoResult BeginReadDataRaw(DataPipeConsumerHandle data_pipe_consumer,
const void** buffer,
uint32_t* buffer_num_bytes,
MojoReadDataFlags flags) {
return MojoBeginReadData(data_pipe_consumer.value(), buffer, buffer_num_bytes,
flags);
}
inline MojoResult EndReadDataRaw(DataPipeConsumerHandle data_pipe_consumer,
uint32_t num_bytes_read) {
return MojoEndReadData(data_pipe_consumer.value(), num_bytes_read);
}
// A wrapper class that automatically creates a data pipe and owns both handles.
// TODO(vtl): Make an even more friendly version? (Maybe templatized for a
// particular type instead of some "element"? Maybe functions that take
// vectors?)
class DataPipe {
public:
DataPipe();
explicit DataPipe(const MojoCreateDataPipeOptions& options);
~DataPipe();
ScopedDataPipeProducerHandle producer_handle;
ScopedDataPipeConsumerHandle consumer_handle;
};
inline DataPipe::DataPipe() {
MojoResult result MOJO_ALLOW_UNUSED =
CreateDataPipe(nullptr, &producer_handle, &consumer_handle);
assert(result == MOJO_RESULT_OK);
}
inline DataPipe::DataPipe(const MojoCreateDataPipeOptions& options) {
MojoResult result MOJO_ALLOW_UNUSED =
CreateDataPipe(&options, &producer_handle, &consumer_handle);
assert(result == MOJO_RESULT_OK);
}
inline DataPipe::~DataPipe() {
}
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_SYSTEM_DATA_PIPE_H_
|
