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