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
|
/* -*- c++ -*- */
/*
* Copyright 2003 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef _FUSB_LIBUSB1_H_
#define _FUSB_LIBUSB1_H_
#include <fusb.h>
#include <list>
struct libusb_transfer;
struct libusb_context;
class fusb_ephandle_libusb1;
/*!
* \brief libusb1 implementation of fusb_devhandle
*/
class fusb_devhandle_libusb1 : public fusb_devhandle
{
private:
std::list<libusb_transfer*> d_pending_rqsts;
libusb_context *d_ctx;
void pending_add (struct libusb_transfer *lut);
struct libusb_transfer * pending_get ();
bool d_teardown;
public:
// CREATORS
fusb_devhandle_libusb1 (libusb_device_handle *udh, libusb_context *ctx);
virtual ~fusb_devhandle_libusb1 ();
// MANIPULATORS
virtual fusb_ephandle *make_ephandle (int endpoint, bool input_p,
int block_size = 0, int nblocks = 0);
// internal use only
bool _submit_lut (libusb_transfer *);
bool _cancel_lut (libusb_transfer *);
void _cancel_pending_rqsts (fusb_ephandle_libusb1 *eph);
bool _reap (bool ok_to_block_p);
void _wait_for_completion ();
// accessors to work from callback context
bool pending_remove (struct libusb_transfer *lut);
inline bool _teardown() { return d_teardown; }
};
/*!
* \brief libusb1 implementation of fusb_ephandle
*/
class fusb_ephandle_libusb1 : public fusb_ephandle
{
private:
fusb_devhandle_libusb1 *d_devhandle;
std::list<libusb_transfer*> d_free_list;
std::list<libusb_transfer*> d_completed_list;
libusb_transfer *d_write_work_in_progress;
unsigned char *d_write_buffer;
libusb_transfer *d_read_work_in_progress;
unsigned char *d_read_buffer;
unsigned char *d_read_buffer_end;
libusb_transfer *get_write_work_in_progress ();
void reap_complete_writes ();
bool reload_read_buffer ();
bool submit_lut (libusb_transfer *lut);
public:
// CREATORS
fusb_ephandle_libusb1 (fusb_devhandle_libusb1 *dh, int endpoint, bool input_p,
int block_size = 0, int nblocks = 0);
virtual ~fusb_ephandle_libusb1 ();
// MANIPULATORS
virtual bool start (); //!< begin streaming i/o
virtual bool stop (); //!< stop streaming i/o
/*!
* \returns \p nbytes if write was successfully enqueued, else -1.
* Will block if no free buffers available.
*/
virtual int write (const void *buffer, int nbytes);
/*!
* \returns number of bytes read or -1 if error.
* number of bytes read will be <= nbytes.
* Will block if no input available.
*/
virtual int read (void *buffer, int nbytes);
/*
* block until all outstanding writes have completed
*/
virtual void wait_for_completion ();
void free_list_add (struct libusb_transfer *lut);
void completed_list_add (struct libusb_transfer *lut);
struct libusb_transfer *free_list_get ();
struct libusb_transfer *completed_list_get ();
// accessor to work from callback context
fusb_devhandle_libusb1* get_fusb_devhandle_libusb1 () const {
return d_devhandle;
}
};
#endif /* _FUSB_LINUX1_H_ */
|
