diff options
Diffstat (limited to 'ncurses-5.2/ncurses/tty/lib_twait.c')
| -rw-r--r-- | ncurses-5.2/ncurses/tty/lib_twait.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/ncurses-5.2/ncurses/tty/lib_twait.c b/ncurses-5.2/ncurses/tty/lib_twait.c deleted file mode 100644 index 6c5f6a6..0000000 --- a/ncurses-5.2/ncurses/tty/lib_twait.c +++ /dev/null @@ -1,265 +0,0 @@ -/**************************************************************************** - * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. * - * * - * Permission is hereby granted, free of charge, to any person obtaining a * - * copy of this software and associated documentation files (the * - * "Software"), to deal in the Software without restriction, including * - * without limitation the rights to use, copy, modify, merge, publish, * - * distribute, distribute with modifications, sublicense, and/or sell * - * copies of the Software, and to permit persons to whom the Software is * - * furnished to do so, subject to the following conditions: * - * * - * The above copyright notice and this permission notice shall be included * - * in all copies or substantial portions of the Software. * - * * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * - * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * - * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * - * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * - * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * - * * - * Except as contained in this notice, the name(s) of the above copyright * - * holders shall not be used in advertising or otherwise to promote the * - * sale, use or other dealings in this Software without prior written * - * authorization. * - ****************************************************************************/ - -/**************************************************************************** - * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * - * and: Eric S. Raymond <esr@snark.thyrsus.com> * - ****************************************************************************/ - -/* -** lib_twait.c -** -** The routine _nc_timed_wait(). -** -** (This file was originally written by Eric Raymond; however except for -** comments, none of the original code remains - T.Dickey). -*/ - -#ifdef __BEOS__ -#include <OS.h> -#endif - -#include <curses.priv.h> - -#if USE_FUNC_POLL -# if HAVE_SYS_TIME_H -# include <sys/time.h> -# endif -#elif HAVE_SELECT -# if HAVE_SYS_TIME_H && HAVE_SYS_TIME_SELECT -# include <sys/time.h> -# endif -# if HAVE_SYS_SELECT_H -# include <sys/select.h> -# endif -#endif - -MODULE_ID("$Id$") - -static long -_nc_gettime(bool first) -{ - long res; - -#if HAVE_GETTIMEOFDAY -# define PRECISE_GETTIME 1 - static struct timeval t0; - struct timeval t1; - gettimeofday(&t1, (struct timezone *) 0); - if (first) { - t0 = t1; - } - res = (t1.tv_sec - t0.tv_sec) * 1000 - + (t1.tv_usec - t0.tv_usec) / 1000; -#else -# define PRECISE_GETTIME 0 - static time_t t0; - time_t t1 = time((time_t *) 0); - if (first) { - t0 = t1; - } - res = (t1 - t0) * 1000; -#endif - T(("%s time: %ld msec", first ? "get" : "elapsed", res)); - return res; -} - -/* - * Wait a specified number of milliseconds, returning nonzero if the timer - * didn't expire before there is activity on the specified file descriptors. - * The file-descriptors are specified by the mode: - * 0 - none (absolute time) - * 1 - ncurses' normal input-descriptor - * 2 - mouse descriptor, if any - * 3 - either input or mouse. - * We return a mask that corresponds to the mode (e.g., 2 for mouse activity). - * - * If the milliseconds given are -1, the wait blocks until activity on the - * descriptors. - */ -int -_nc_timed_wait(int mode, int milliseconds, int *timeleft) -{ - int fd; - int count; - - int result; - -#if USE_FUNC_POLL - struct pollfd fds[2]; -#elif defined(__BEOS__) -#elif HAVE_SELECT - static fd_set set; -#endif - - long starttime, returntime; - - T(("start twait: %d milliseconds, mode: %d", milliseconds, mode)); - -#if PRECISE_GETTIME - retry: -#endif - starttime = _nc_gettime(TRUE); - - count = 0; - -#if USE_FUNC_POLL - memset(fds, 0, sizeof(fds)); - if (mode & 1) { - fds[count].fd = SP->_ifd; - fds[count].events = POLLIN; - count++; - } - if ((mode & 2) - && (fd = SP->_mouse_fd) >= 0) { - fds[count].fd = fd; - fds[count].events = POLLIN; - count++; - } - result = poll(fds, count, milliseconds); - -#elif defined(__BEOS__) - /* - * BeOS's select() is declared in socket.h, so the configure script does - * not see it. That's just as well, since that function works only for - * sockets. This (using snooze and ioctl) was distilled from Be's patch - * for ncurses which uses a separate thread to simulate select(). - * - * FIXME: the return values from the ioctl aren't very clear if we get - * interrupted. - */ - result = 0; - if (mode & 1) { - bigtime_t d; - bigtime_t useconds = milliseconds * 1000; - int n, howmany; - - if (useconds == 0) /* we're here to go _through_ the loop */ - useconds = 1; - - for (d = 0; d < useconds; d += 5000) { - n = 0; - howmany = ioctl(0, 'ichr', &n); - if (howmany >= 0 && n > 0) { - result = 1; - break; - } - if (useconds > 1) - snooze(5000); - milliseconds -= 5; - } - } else if (milliseconds > 0) { - snooze(milliseconds * 1000); - milliseconds = 0; - } -#elif HAVE_SELECT - /* - * select() modifies the fd_set arguments; do this in the - * loop. - */ - FD_ZERO(&set); - - if (mode & 1) { - FD_SET(SP->_ifd, &set); - count = SP->_ifd + 1; - } - if ((mode & 2) - && (fd = SP->_mouse_fd) >= 0) { - FD_SET(fd, &set); - count = max(fd, count) + 1; - } - - if (milliseconds >= 0) { - struct timeval ntimeout; - ntimeout.tv_sec = milliseconds / 1000; - ntimeout.tv_usec = (milliseconds % 1000) * 1000; - result = select(count, &set, NULL, NULL, &ntimeout); - } else { - result = select(count, &set, NULL, NULL, NULL); - } -#endif - - returntime = _nc_gettime(FALSE); - - if (milliseconds >= 0) - milliseconds -= (returntime - starttime); - -#if PRECISE_GETTIME - /* - * If the timeout hasn't expired, and we've gotten no data, - * this is probably a system where 'select()' needs to be left - * alone so that it can complete. Make this process sleep, - * then come back for more. - */ - if (result == 0 && milliseconds > 100) { - napms(100); - milliseconds -= 100; - goto retry; - } -#endif - - /* return approximate time left in milliseconds */ - if (timeleft) - *timeleft = milliseconds; - - T(("end twait: returned %d (%d), remaining time %d msec", - result, errno, milliseconds)); - - /* - * Both 'poll()' and 'select()' return the number of file descriptors - * that are active. Translate this back to the mask that denotes which - * file-descriptors, so that we don't need all of this system-specific - * code everywhere. - */ - if (result != 0) { - if (result > 0) { - result = 0; -#if USE_FUNC_POLL - for (count = 0; count < 2; count++) { - if ((mode & (1 << count)) - && (fds[count].revents & POLLIN)) { - result |= (1 << count); - } - } -#elif defined(__BEOS__) - result = 1; /* redundant, but simple */ -#elif HAVE_SELECT - if ((mode & 2) - && (fd = SP->_mouse_fd) >= 0 - && FD_ISSET(fd, &set)) - result |= 2; - if ((mode & 1) - && FD_ISSET(SP->_ifd, &set)) - result |= 1; -#endif - } else - result = 0; - } - - return (result); -} |