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 
26 #include "gfxstream/guest/IOStream.h"
27 
28 #include <qemu_pipe_bp.h>
29 
30 class QemuPipeStream : public gfxstream::guest::IOStream {
31 public:
32  typedef enum { ERR_INVALID_SOCKET = -1000 } QemuPipeStreamError;
33 
34  explicit QemuPipeStream(size_t bufsize = 10000);
35  ~QemuPipeStream();
36 
37  virtual int connect(const char* serviceName = nullptr);
38  virtual uint64_t processPipeInit();
39 
40  virtual void* allocBuffer(size_t minSize);
41  virtual int commitBuffer(size_t size);
42  virtual const unsigned char* readFully(void* buf, size_t len);
43  virtual const unsigned char* commitBufferAndReadFully(size_t size, void* buf, size_t len);
44  virtual const unsigned char* read(void* buf, size_t* inout_len);
45 
valid()46  bool valid() { return qemu_pipe_valid(m_sock); }
47  int recv(void* buf, size_t len);
48 
49  virtual int writeFully(const void* buf, size_t len);
50 
51  QEMU_PIPE_HANDLE getSocket() const;
52 private:
53     QEMU_PIPE_HANDLE m_sock;
54     size_t m_bufsize;
55     unsigned char *m_buf;
56     size_t m_read;
57     size_t m_readLeft;
58     QemuPipeStream(QEMU_PIPE_HANDLE sock, size_t bufSize);
59 };
60 
61 #endif
62