release/src/router/libusb10/libusb/os/threads_windows.h

   1 /*
   2  * libusb synchronization on Microsoft Windows
   3  *
   4  * Copyright (C) 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 struct 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
  64 int usbi_mutex_static_lock(usbi_mutex_static_t *mutex);
  65 int usbi_mutex_static_unlock(usbi_mutex_static_t *mutex);
  66
  67
  68 int usbi_mutex_init(usbi_mutex_t *mutex,
  69                                         const usbi_mutexattr_t *attr);
  70 int usbi_mutex_lock(usbi_mutex_t *mutex);
  71 int usbi_mutex_unlock(usbi_mutex_t *mutex);
  72 int usbi_mutex_trylock(usbi_mutex_t *mutex);
  73 int usbi_mutex_destroy(usbi_mutex_t *mutex);
  74
  75 int usbi_cond_init(usbi_cond_t *cond,
  76                                    const usbi_condattr_t *attr);
  77 int usbi_cond_destroy(usbi_cond_t *cond);
  78 int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex);
  79 int usbi_cond_timedwait(usbi_cond_t *cond,
  80                                                 usbi_mutex_t *mutex,
  81                                                 const struct timespec *abstime);
  82 int usbi_cond_broadcast(usbi_cond_t *cond);
  83 int usbi_cond_signal(usbi_cond_t *cond);
  84
  85 #endif /* LIBUSB_THREADS_WINDOWS_H */
  86