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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     int connect(void);
37 
38     virtual void *allocBuffer(size_t minSize);
39     virtual int commitBuffer(size_t size);
40     virtual const unsigned char *readFully( void *buf, size_t len);
41     virtual const unsigned char *commitBufferAndReadFully(size_t size, void *buf, size_t len);
42     virtual const unsigned char *read( void *buf, size_t *inout_len);
43 
valid()44     bool valid() { return qemu_pipe_valid(m_sock); }
45     int recv(void *buf, size_t len);
46 
47     virtual int writeFully(const void *buf, size_t len);
48 
49     QEMU_PIPE_HANDLE getSocket() const;
50 private:
51     QEMU_PIPE_HANDLE m_sock;
52     size_t m_bufsize;
53     unsigned char *m_buf;
54     size_t m_read;
55     size_t m_readLeft;
56     QemuPipeStream(QEMU_PIPE_HANDLE sock, size_t bufSize);
57 };
58 
59 #endif
60