2 * libusb synchronization on Microsoft Windows
4 * Copyright © 2010 Michael Plante <michael.plante@gmail.com>
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.
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.
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
21 #ifndef LIBUSB_THREADS_WINDOWS_H
22 #define LIBUSB_THREADS_WINDOWS_H
24 #define USBI_MUTEX_INITIALIZER 0L
26 typedef LONG usbi_mutex_static_t;
28 typedef volatile LONG usbi_mutex_static_t;
30 void usbi_mutex_static_lock(usbi_mutex_static_t *mutex);
31 static inline void usbi_mutex_static_unlock(usbi_mutex_static_t *mutex)
33 InterlockedExchange(mutex, 0L);
36 typedef CRITICAL_SECTION usbi_mutex_t;
37 static inline int usbi_mutex_init(usbi_mutex_t *mutex)
39 InitializeCriticalSection(mutex);
42 static inline void usbi_mutex_lock(usbi_mutex_t *mutex)
44 EnterCriticalSection(mutex);
46 static inline void usbi_mutex_unlock(usbi_mutex_t *mutex)
48 LeaveCriticalSection(mutex);
50 static inline int usbi_mutex_trylock(usbi_mutex_t *mutex)
52 return !TryEnterCriticalSection(mutex);
54 static inline void usbi_mutex_destroy(usbi_mutex_t *mutex)
56 DeleteCriticalSection(mutex);
59 // We *were* getting timespec from pthread.h:
60 #if (!defined(HAVE_STRUCT_TIMESPEC) && !defined(_TIMESPEC_DEFINED))
61 #define HAVE_STRUCT_TIMESPEC 1
62 #define _TIMESPEC_DEFINED 1
67 #endif /* HAVE_STRUCT_TIMESPEC | _TIMESPEC_DEFINED */
69 // We *were* getting ETIMEDOUT from pthread.h:
71 #define ETIMEDOUT 10060 /* This is the value in winsock.h. */
74 typedef struct usbi_cond {
75 // Every time a thread touches the CV, it winds up in one of these lists.
76 // It stays there until the CV is destroyed, even if the thread terminates.
77 struct list_head waiters;
78 struct list_head not_waiting;
81 void usbi_cond_init(usbi_cond_t *cond);
82 int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex);
83 int usbi_cond_timedwait(usbi_cond_t *cond,
84 usbi_mutex_t *mutex, const struct timeval *tv);
85 void usbi_cond_broadcast(usbi_cond_t *cond);
86 void usbi_cond_destroy(usbi_cond_t *cond);
88 typedef DWORD usbi_tls_key_t;
89 static inline void usbi_tls_key_create(usbi_tls_key_t *key)
93 static inline void *usbi_tls_key_get(usbi_tls_key_t key)
95 return TlsGetValue(key);
97 static inline void usbi_tls_key_set(usbi_tls_key_t key, void *ptr)
99 (void)TlsSetValue(key, ptr);
101 static inline void usbi_tls_key_delete(usbi_tls_key_t key)
106 static inline int usbi_get_tid(void)
108 return (int)GetCurrentThreadId();
111 #endif /* LIBUSB_THREADS_WINDOWS_H */