| /* |
| * Windows compat: POSIX compatibility wrapper |
| * Copyright © 2012-2013 RealVNC Ltd. |
| * Copyright © 2009-2010 Pete Batard <pete@akeo.ie> |
| * Copyright © 2016-2018 Chris Dickens <christopher.a.dickens@gmail.com> |
| * 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 |
| * |
| */ |
| |
| #ifndef LIBUSB_POLL_WINDOWS_H |
| #define LIBUSB_POLL_WINDOWS_H |
| |
| // 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 |
| #define HasOverlappedIoCompletedSync(lpOverlapped) (((DWORD)(lpOverlapped)->Internal) == STATUS_COMPLETED_SYNCHRONOUSLY) |
| |
| #define DUMMY_HANDLE ((HANDLE)(LONG_PTR)-2) |
| |
| #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 */ |
| |
| typedef unsigned int usbi_nfds_t; |
| |
| struct pollfd { |
| int fd; /* file descriptor */ |
| short events; /* requested events */ |
| short revents; /* returned events */ |
| }; |
| |
| struct winfd { |
| int fd; // what's exposed to libusb core |
| OVERLAPPED *overlapped; // what will report our I/O status |
| }; |
| |
| extern const struct winfd INVALID_WINFD; |
| |
| struct winfd usbi_create_fd(void); |
| |
| int usbi_pipe(int pipefd[2]); |
| int usbi_poll(struct pollfd *fds, usbi_nfds_t 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); |
| |
| /* |
| * Timeval operations |
| */ |
| #if !defined(TIMESPEC_TO_TIMEVAL) |
| #define TIMESPEC_TO_TIMEVAL(tv, ts) \ |
| do { \ |
| (tv)->tv_sec = (long)(ts)->tv_sec; \ |
| (tv)->tv_usec = (long)(ts)->tv_nsec / 1000; \ |
| } while (0) |
| #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 |
| |
| #endif |