1/*
2 * libusbx synchronization on Microsoft Windows
3 *
4 * Copyright © 2010 Michael Plante <michael.plante@gmail.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#ifndef LIBUSB_THREADS_WINDOWS_H
22#define LIBUSB_THREADS_WINDOWS_H
23
24#define usbi_mutex_static_t     volatile LONG
25#define USBI_MUTEX_INITIALIZER  0
26
27#define usbi_mutex_t            HANDLE
28
29struct usbi_cond_perthread {
30	struct list_head list;
31	DWORD            tid;
32	HANDLE           event;
33};
34struct usbi_cond_t_ {
35	// Every time a thread touches the CV, it winds up in one of these lists.
36	//   It stays there until the CV is destroyed, even if the thread
37	//   terminates.
38	struct list_head waiters;
39	struct list_head not_waiting;
40};
41typedef struct usbi_cond_t_ usbi_cond_t;
42
43// We *were* getting timespec from pthread.h:
44#if (!defined(HAVE_STRUCT_TIMESPEC) && !defined(_TIMESPEC_DEFINED))
45#define HAVE_STRUCT_TIMESPEC 1
46#define _TIMESPEC_DEFINED 1
47struct timespec {
48		long tv_sec;
49		long tv_nsec;
50};
51#endif /* HAVE_STRUCT_TIMESPEC | _TIMESPEC_DEFINED */
52
53// We *were* getting ETIMEDOUT from pthread.h:
54#ifndef ETIMEDOUT
55#  define ETIMEDOUT 10060     /* This is the value in winsock.h. */
56#endif
57
58#define usbi_mutexattr_t void
59#define usbi_condattr_t  void
60
61// all Windows mutexes are recursive
62#define usbi_mutex_init_recursive(mutex, attr) usbi_mutex_init((mutex), (attr))
63
64int usbi_mutex_static_lock(usbi_mutex_static_t *mutex);
65int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex);
66
67
68int usbi_mutex_init(usbi_mutex_t *mutex,
69					const usbi_mutexattr_t *attr);
70int usbi_mutex_lock(usbi_mutex_t *mutex);
71int usbi_mutex_unlock(usbi_mutex_t *mutex);
72int usbi_mutex_trylock(usbi_mutex_t *mutex);
73int usbi_mutex_destroy(usbi_mutex_t *mutex);
74
75int usbi_cond_init(usbi_cond_t *cond,
76				   const usbi_condattr_t *attr);
77int usbi_cond_destroy(usbi_cond_t *cond);
78int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex);
79int usbi_cond_timedwait(usbi_cond_t *cond,
80						usbi_mutex_t *mutex,
81						const struct timespec *abstime);
82int usbi_cond_broadcast(usbi_cond_t *cond);
83int usbi_cond_signal(usbi_cond_t *cond);
84
85int usbi_get_tid(void);
86
87#endif /* LIBUSB_THREADS_WINDOWS_H */
88