app/src/main/jni/libusb-1.0.22/libusb/os/windows_common.h

   1 /*
   2  * Windows backend common header for libusb 1.0
   3  *
   4  * This file brings together header code common between
   5  * the desktop Windows and Windows CE backends.
   6  * Copyright © 2012-2013 RealVNC Ltd.
   7  * Copyright © 2009-2012 Pete Batard <pete@akeo.ie>
   8  * With contributions from Michael Plante, Orin Eman et al.
   9  * Parts of this code adapted from libusb-win32-v1 by Stephan Meyer
  10  * Major code testing contribution by Xiaofan Chen
  11  *
  12  * This library is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU Lesser General Public
  14  * License as published by the Free Software Foundation; either
  15  * version 2.1 of the License, or (at your option) any later version.
  16  *
  17  * This library is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public
  23  * License along with this library; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  25  */
  26
  27 #pragma once
  28
  29 // Windows API default is uppercase - ugh!
  30 #if !defined(bool)
  31 #define bool BOOL
  32 #endif
  33 #if !defined(true)
  34 #define true TRUE
  35 #endif
  36 #if !defined(false)
  37 #define false FALSE
  38 #endif
  39
  40 #define EPOCH_TIME      UINT64_C(116444736000000000)    // 1970.01.01 00:00:000 in MS Filetime
  41
  42 #if defined(__CYGWIN__ )
  43 #define _stricmp strcasecmp
  44 #define _strdup strdup
  45 // _beginthreadex is MSVCRT => unavailable for cygwin. Fallback to using CreateThread
  46 #define _beginthreadex(a, b, c, d, e, f) CreateThread(a, b, (LPTHREAD_START_ROUTINE)c, d, e, (LPDWORD)f)
  47 #endif
  48
  49 #define safe_free(p) do {if (p != NULL) {free((void *)p); p = NULL;}} while (0)
  50
  51 #ifndef ARRAYSIZE
  52 #define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))
  53 #endif
  54
  55 #define ERR_BUFFER_SIZE 256
  56
  57 /*
  58  * API macros - leveraged from libusb-win32 1.x
  59  */
  60 #ifndef _WIN32_WCE
  61 #define DLL_STRINGIFY(s) #s
  62 #define DLL_LOAD_LIBRARY(name) LoadLibraryA(DLL_STRINGIFY(name))
  63 #else
  64 #define DLL_STRINGIFY(s) L#s
  65 #define DLL_LOAD_LIBRARY(name) LoadLibrary(DLL_STRINGIFY(name))
  66 #endif
  67
  68 /*
  69  * Macros for handling DLL themselves
  70  */
  71 #define DLL_HANDLE_NAME(name) __dll_##name##_handle
  72
  73 #define DLL_DECLARE_HANDLE(name)                                \
  74         static HMODULE DLL_HANDLE_NAME(name) = NULL
  75
  76 #define DLL_GET_HANDLE(name)                                    \
  77         do {                                                    \
  78                 DLL_HANDLE_NAME(name) = DLL_LOAD_LIBRARY(name); \
  79                 if (!DLL_HANDLE_NAME(name))                     \
  80                         return FALSE;                           \
  81         } while (0)
  82
  83 #define DLL_FREE_HANDLE(name)                                   \
  84         do {                                                    \
  85                 if (DLL_HANDLE_NAME(name)) {                    \
  86                         FreeLibrary(DLL_HANDLE_NAME(name));     \
  87                         DLL_HANDLE_NAME(name) = NULL;           \
  88                 }                                               \
  89         } while (0)
  90
  91
  92 /*
  93  * Macros for handling functions within a DLL
  94  */
  95 #define DLL_FUNC_NAME(name) __dll_##name##_func_t
  96
  97 #define DLL_DECLARE_FUNC_PREFIXNAME(api, ret, prefixname, name, args)   \
  98         typedef ret (api * DLL_FUNC_NAME(name))args;                    \
  99         static DLL_FUNC_NAME(name) prefixname = NULL
 100
 101 #define DLL_DECLARE_FUNC(api, ret, name, args)                          \
 102         DLL_DECLARE_FUNC_PREFIXNAME(api, ret, name, name, args)
 103 #define DLL_DECLARE_FUNC_PREFIXED(api, ret, prefix, name, args)         \
 104         DLL_DECLARE_FUNC_PREFIXNAME(api, ret, prefix##name, name, args)
 105
 106 #define DLL_LOAD_FUNC_PREFIXNAME(dll, prefixname, name, ret_on_failure) \
 107         do {                                                            \
 108                 HMODULE h = DLL_HANDLE_NAME(dll);                       \
 109                 prefixname = (DLL_FUNC_NAME(name))GetProcAddress(h,     \
 110                                 DLL_STRINGIFY(name));                   \
 111                 if (prefixname)                                         \
 112                         break;                                          \
 113                 prefixname = (DLL_FUNC_NAME(name))GetProcAddress(h,     \
 114                                 DLL_STRINGIFY(name) DLL_STRINGIFY(A));  \
 115                 if (prefixname)                                         \
 116                         break;                                          \
 117                 prefixname = (DLL_FUNC_NAME(name))GetProcAddress(h,     \
 118                                 DLL_STRINGIFY(name) DLL_STRINGIFY(W));  \
 119                 if (prefixname)                                         \
 120                         break;                                          \
 121                 if (ret_on_failure)                                     \
 122                         return FALSE;                                   \
 123         } while (0)
 124
 125 #define DLL_LOAD_FUNC(dll, name, ret_on_failure)                        \
 126         DLL_LOAD_FUNC_PREFIXNAME(dll, name, name, ret_on_failure)
 127 #define DLL_LOAD_FUNC_PREFIXED(dll, prefix, name, ret_on_failure)       \
 128         DLL_LOAD_FUNC_PREFIXNAME(dll, prefix##name, name, ret_on_failure)