1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #ifndef __QEMU_PIPE_STREAM_H
17 #define __QEMU_PIPE_STREAM_H
18 
19 /* This file implements an IOStream that uses a QEMU fast-pipe
20  * to communicate with the emulator's 'opengles' service. See
21  * <hardware/qemu_pipe.h> for more details.
22  */
23 #include <stdlib.h>
24 #include <memory>
25 #include "IOStream.h"
26 
27 #include <qemu_pipe_bp.h>
28 
29 #ifdef __Fuchsia__
30 #include <fuchsia/hardware/goldfish/llcpp/fidl.h>
31 #include <lib/zx/event.h>
32 #include <lib/zx/vmo.h>
33 #endif
34 
35 class QemuPipeStream : public IOStream {
36 public:
37     typedef enum { ERR_INVALID_SOCKET = -1000 } QemuPipeStreamError;
38 
39     explicit QemuPipeStream(size_t bufsize = 10000);
40     ~QemuPipeStream();
41     int connect(void);
42 
43     virtual void *allocBuffer(size_t minSize);
44     virtual int commitBuffer(size_t size);
45     virtual const unsigned char *readFully( void *buf, size_t len);
46     virtual const unsigned char *commitBufferAndReadFully(size_t size, void *buf, size_t len);
47     virtual const unsigned char *read( void *buf, size_t *inout_len);
48 
valid()49     bool valid() { return qemu_pipe_valid(m_sock); }
50     int recv(void *buf, size_t len);
51 
52     virtual int writeFully(const void *buf, size_t len);
53 
54     QEMU_PIPE_HANDLE getSocket() const;
55 private:
56     QEMU_PIPE_HANDLE m_sock;
57     size_t m_bufsize;
58     unsigned char *m_buf;
59     size_t m_read;
60     size_t m_readLeft;
61 #ifdef __Fuchsia__
62     std::unique_ptr<llcpp::fuchsia::hardware::goldfish::PipeDevice::SyncClient>
63         m_device;
64     std::unique_ptr<llcpp::fuchsia::hardware::goldfish::Pipe::SyncClient>
65         m_pipe;
66     zx::event m_event;
67     zx::vmo m_vmo;
68 #endif
69     QemuPipeStream(QEMU_PIPE_HANDLE sock, size_t bufSize);
70 };
71 
72 #endif
73