/* * Windows compat: POSIX compatibility wrapper * Copyright © 2012-2013 RealVNC Ltd. * Copyright © 2009-2010 Pete Batard * With contributions from Michael Plante, Orin Eman et al. * Parts of poll implementation from libusb-win32, by Stephan Meyer et al. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * */ #pragma once #if defined(_MSC_VER) // disable /W4 MSVC warnings that are benign #pragma warning(disable:4127) // conditional expression is constant #endif // Handle synchronous completion through the overlapped structure #if !defined(STATUS_REPARSE) // reuse the REPARSE status code #define STATUS_REPARSE ((LONG)0x00000104L) #endif #define STATUS_COMPLETED_SYNCHRONOUSLY STATUS_REPARSE #if defined(_WIN32_WCE) // WinCE doesn't have a HasOverlappedIoCompleted() macro, so attempt to emulate it #define HasOverlappedIoCompleted(lpOverlapped) (((DWORD)(lpOverlapped)->Internal) != STATUS_PENDING) #endif #define HasOverlappedIoCompletedSync(lpOverlapped) (((DWORD)(lpOverlapped)->Internal) == STATUS_COMPLETED_SYNCHRONOUSLY) #define DUMMY_HANDLE ((HANDLE)(LONG_PTR)-2) /* Windows versions */ enum windows_version { WINDOWS_CE = -2, WINDOWS_UNDEFINED = -1, WINDOWS_UNSUPPORTED = 0, WINDOWS_XP = 0x51, WINDOWS_2003 = 0x52, // Also XP x64 WINDOWS_VISTA = 0x60, WINDOWS_7 = 0x61, WINDOWS_8 = 0x62, WINDOWS_8_1_OR_LATER = 0x63, WINDOWS_MAX }; extern int windows_version; #define MAX_FDS 256 #define POLLIN 0x0001 /* There is data to read */ #define POLLPRI 0x0002 /* There is urgent data to read */ #define POLLOUT 0x0004 /* Writing now will not block */ #define POLLERR 0x0008 /* Error condition */ #define POLLHUP 0x0010 /* Hung up */ #define POLLNVAL 0x0020 /* Invalid request: fd not open */ struct pollfd { int fd; /* file descriptor */ short events; /* requested events */ short revents; /* returned events */ }; // access modes enum rw_type { RW_NONE, RW_READ, RW_WRITE, }; // fd struct that can be used for polling on Windows typedef int cancel_transfer(struct usbi_transfer *itransfer); struct winfd { int fd; // what's exposed to libusb core HANDLE handle; // what we need to attach overlapped to the I/O op, so we can poll it OVERLAPPED* overlapped; // what will report our I/O status struct usbi_transfer *itransfer; // Associated transfer, or NULL if completed cancel_transfer *cancel_fn; // Function pointer to cancel transfer API enum rw_type rw; // I/O transfer direction: read *XOR* write (NOT BOTH) }; extern const struct winfd INVALID_WINFD; int usbi_pipe(int pipefd[2]); int usbi_poll(struct pollfd *fds, unsigned int nfds, int timeout); ssize_t usbi_write(int fd, const void *buf, size_t count); ssize_t usbi_read(int fd, void *buf, size_t count); int usbi_close(int fd); void init_polling(void); void exit_polling(void); struct winfd usbi_create_fd(HANDLE handle, int access_mode, struct usbi_transfer *transfer, cancel_transfer *cancel_fn); void usbi_free_fd(struct winfd* winfd); struct winfd fd_to_winfd(int fd); struct winfd handle_to_winfd(HANDLE handle); struct winfd overlapped_to_winfd(OVERLAPPED* overlapped); /* * Timeval operations */ #if defined(DDKBUILD) #include // defines timeval functions on DDK #endif #if !defined(TIMESPEC_TO_TIMEVAL) #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ (tv)->tv_sec = (long)(ts)->tv_sec; \ (tv)->tv_usec = (long)(ts)->tv_nsec / 1000; \ } #endif #if !defined(timersub) #define timersub(a, b, result) \ do { \ (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ if ((result)->tv_usec < 0) { \ --(result)->tv_sec; \ (result)->tv_usec += 1000000; \ } \ } while (0) #endif