diff options
Diffstat (limited to 'vendor/github.com/karalabe/hid/libusb/libusb/os/poll_windows.h')
-rw-r--r-- | vendor/github.com/karalabe/hid/libusb/libusb/os/poll_windows.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/vendor/github.com/karalabe/hid/libusb/libusb/os/poll_windows.h b/vendor/github.com/karalabe/hid/libusb/libusb/os/poll_windows.h new file mode 100644 index 000000000..aa4c985da --- /dev/null +++ b/vendor/github.com/karalabe/hid/libusb/libusb/os/poll_windows.h @@ -0,0 +1,131 @@ +/* + * Windows compat: POSIX compatibility wrapper + * Copyright © 2012-2013 RealVNC Ltd. + * Copyright © 2009-2010 Pete Batard <pete@akeo.ie> + * 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 <winsock.h> // 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 |