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 29 struct usbi_cond_perthread { 30 struct list_head list; 31 DWORD tid; 32 HANDLE event; 33 }; 34 struct 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 }; 41 typedef 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 47 #if _MSC_VER < 1900 48 // VS 2015 and above include <time.h> in stdlib.h 49 struct timespec { 50 long tv_sec; 51 long tv_nsec; 52 }; 53 #endif 54 #endif /* HAVE_STRUCT_TIMESPEC | _TIMESPEC_DEFINED */ 55 56 // We *were* getting ETIMEDOUT from pthread.h: 57 #ifndef ETIMEDOUT 58 # define ETIMEDOUT 10060 /* This is the value in winsock.h. */ 59 #endif 60 61 #define usbi_mutexattr_t void 62 #define usbi_condattr_t void 63 64 // all Windows mutexes are recursive 65 #define usbi_mutex_init_recursive(mutex, attr) usbi_mutex_init((mutex), (attr)) 66 67 int usbi_mutex_static_lock(usbi_mutex_static_t *mutex); 68 int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex); 69 70 71 int usbi_mutex_init(usbi_mutex_t *mutex, 72 const usbi_mutexattr_t *attr); 73 int usbi_mutex_lock(usbi_mutex_t *mutex); 74 int usbi_mutex_unlock(usbi_mutex_t *mutex); 75 int usbi_mutex_trylock(usbi_mutex_t *mutex); 76 int usbi_mutex_destroy(usbi_mutex_t *mutex); 77 78 int usbi_cond_init(usbi_cond_t *cond, 79 const usbi_condattr_t *attr); 80 int usbi_cond_destroy(usbi_cond_t *cond); 81 int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex); 82 int usbi_cond_timedwait(usbi_cond_t *cond, 83 usbi_mutex_t *mutex, 84 const struct timespec *abstime); 85 int usbi_cond_broadcast(usbi_cond_t *cond); 86 int usbi_cond_signal(usbi_cond_t *cond); 87 88 int usbi_get_tid(void); 89 90 #endif /* LIBUSB_THREADS_WINDOWS_H */ 91