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
|
// 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_SYSTEM_EMBEDDER_EMBEDDER_H_
#define MOJO_SYSTEM_EMBEDDER_EMBEDDER_H_
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/task_runner.h"
#include "mojo/public/system/core.h"
#include "mojo/system/embedder/scoped_platform_handle.h"
#include "mojo/system/system_impl_export.h"
namespace mojo {
namespace embedder {
// Must be called first to initialize the (global, singleton) system.
MOJO_SYSTEM_IMPL_EXPORT void Init();
// Creates a new "channel", returning a handle to the bootstrap message pipe on
// that channel. |platform_handle| should be an OS-dependent handle to one side
// of a suitable bidirectional OS "pipe" (e.g., a file descriptor to a socket on
// POSIX, a handle to a named pipe on Windows); this "pipe" should be connected
// and ready for operation (e.g., to be written to or read from).
// |io_thread_task_runner| should be a |TaskRunner| for the thread on which the
// "channel" will run (read data and demultiplex).
//
// Returns |MOJO_HANDLE_INVALID| on error. Note that this will happen only if,
// e.g., the handle table is full (operation of the channel begins
// asynchronously and if, e.g., the other end of the "pipe" is closed, this will
// report an error to the returned handle in the usual way).
//
// Notes: The handle returned is ready for use immediately, with messages
// written to it queued. E.g., it would be perfectly valid for a message to be
// immediately written to the returned handle and the handle closed, all before
// the channel has begun operation on the IO thread. In this case, the channel
// is expected to connect as usual, send the queued message, and report that the
// handle was closed to the other side. (This message may well contain another
// handle, so there may well still be message pipes "on" this channel.)
//
// TODO(vtl): Figure out channel teardown.
struct ChannelInfo;
typedef base::Callback<void(ChannelInfo*)> DidCreateChannelOnIOThreadCallback;
MOJO_SYSTEM_IMPL_EXPORT MojoHandle CreateChannel(
ScopedPlatformHandle platform_handle,
scoped_refptr<base::TaskRunner> io_thread_task_runner,
DidCreateChannelOnIOThreadCallback callback);
MOJO_SYSTEM_IMPL_EXPORT void DestroyChannelOnIOThread(
ChannelInfo* channel_info);
} // namespace embedder
} // namespace mojo
#endif // MOJO_SYSTEM_EMBEDDER_EMBEDDER_H_
|
