/****************************************************************************
- * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2008,2009 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 *
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
+ * and: Thomas E. Dickey 1996-on *
****************************************************************************/
/*
** comments, none of the original code remains - T.Dickey).
*/
+#include <curses.priv.h>
+
+#if defined __HAIKU__ && defined __BEOS__
+#undef __BEOS__
+#endif
+
#ifdef __BEOS__
+#undef false
+#undef true
#include <OS.h>
#endif
-#include <curses.priv.h>
-
#if USE_FUNC_POLL
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# include <sys/select.h>
# endif
#endif
+#ifdef __MINGW32__
+# include <sys/time.h>
+#endif
+#undef CUR
-MODULE_ID("$Id: lib_twait.c,v 1.37 2000/06/29 23:03:09 tom Exp $")
+MODULE_ID("$Id: lib_twait.c,v 1.60 2009/04/18 21:01:13 tom Exp $")
-static long _nc_gettime(bool first)
+static long
+_nc_gettime(TimeType * t0, 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;
+ long res;
+
+#if PRECISE_GETTIME
+ TimeType t1;
+ gettimeofday(&t1, (struct timezone *) 0);
+ if (first) {
+ *t0 = t1;
+ res = 0;
+ } else {
+ /* .tv_sec and .tv_usec are unsigned, be careful when subtracting */
+ if (t0->tv_usec > t1.tv_usec) {
+ t1.tv_usec += 1000000; /* Convert 1s in 1e6 microsecs */
+ t1.tv_sec--;
}
- res = (t1.tv_sec - t0.tv_sec) * 1000
- + (t1.tv_usec - t0.tv_usec) / 1000;
+ 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;
+ 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;
+ TR(TRACE_IEVENT, ("%s time: %ld msec", first ? "get" : "elapsed", res));
+ return res;
+}
+
+#ifdef NCURSES_WGETCH_EVENTS
+NCURSES_EXPORT(int)
+_nc_eventlist_timeout(_nc_eventlist * evl)
+{
+ int event_delay = -1;
+ int n;
+
+ if (evl != 0) {
+
+ for (n = 0; n < evl->count; ++n) {
+ _nc_event *ev = evl->events[n];
+
+ if (ev->type == _NC_EVENT_TIMEOUT_MSEC) {
+ event_delay = ev->data.timeout_msec;
+ if (event_delay < 0)
+ event_delay = INT_MAX; /* FIXME Is this defined? */
+ }
+ }
+ }
+ return event_delay;
}
+#endif /* NCURSES_WGETCH_EVENTS */
+
+#if (USE_FUNC_POLL || HAVE_SELECT)
+# define MAYBE_UNUSED
+#else
+# define MAYBE_UNUSED GCC_UNUSED
+#endif
+
+#if (USE_FUNC_POLL || HAVE_SELECT)
+# define MAYBE_UNUSED
+#else
+# define MAYBE_UNUSED GCC_UNUSED
+#endif
/*
* 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.
+ * TW_NONE 0 - none (absolute time)
+ * TW_INPUT 1 - ncurses' normal input-descriptor
+ * TW_MOUSE 2 - mouse descriptor, if any
+ * TW_ANY 3 - either input or mouse.
+ * TW_EVENT 4 -
+ * Experimental: if NCURSES_WGETCH_EVENTS is defined, (mode & 4) determines
+ * whether to pay attention to evl argument. If set, the smallest of
+ * millisecond and of timeout of evl is taken.
+ *
* 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)
+NCURSES_EXPORT(int)
+_nc_timed_wait(SCREEN *sp MAYBE_UNUSED,
+ int mode MAYBE_UNUSED,
+ int milliseconds,
+ int *timeleft
+ EVENTLIST_2nd(_nc_eventlist * evl))
{
-int fd;
-int count;
+ int count;
+ int result = TW_NONE;
+ TimeType t0;
+#if (USE_FUNC_POLL || HAVE_SELECT)
+ int fd;
+#endif
-int result;
+#ifdef NCURSES_WGETCH_EVENTS
+ int timeout_is_event = 0;
+ int n;
+#endif
#if USE_FUNC_POLL
-struct pollfd fds[2];
+#define MIN_FDS 2
+ struct pollfd fd_list[MIN_FDS];
+ struct pollfd *fds = fd_list;
#elif defined(__BEOS__)
#elif HAVE_SELECT
-static fd_set set;
+ fd_set set;
#endif
-long starttime, returntime;
+ long starttime, returntime;
- T(("start twait: %d milliseconds, mode: %d", milliseconds, mode));
+ TR(TRACE_IEVENT, ("start twait: %d milliseconds, mode: %d",
+ milliseconds, mode));
-#if PRECISE_GETTIME
-retry:
+#ifdef NCURSES_WGETCH_EVENTS
+ if (mode & TW_EVENT) {
+ int event_delay = _nc_eventlist_timeout(evl);
+
+ if (event_delay >= 0
+ && (milliseconds >= event_delay || milliseconds < 0)) {
+ milliseconds = event_delay;
+ timeout_is_event = 1;
+ }
+ }
+#endif
+
+#if PRECISE_GETTIME && HAVE_NANOSLEEP
+ retry:
#endif
- starttime = _nc_gettime(TRUE);
+ starttime = _nc_gettime(&t0, TRUE);
- count = 0;
+ count = 0;
+
+#ifdef NCURSES_WGETCH_EVENTS
+ if ((mode & TW_EVENT) && evl)
+ evl->result_flags = 0;
+#endif
#if USE_FUNC_POLL
- if (mode & 1) {
- fds[count].fd = SP->_ifd;
+ memset(fd_list, 0, sizeof(fd_list));
+
+#ifdef NCURSES_WGETCH_EVENTS
+ if ((mode & TW_EVENT) && evl)
+ fds = typeMalloc(struct pollfd, MIN_FDS + evl->count);
+#endif
+
+ if (mode & TW_INPUT) {
+ fds[count].fd = sp->_ifd;
+ fds[count].events = POLLIN;
+ count++;
+ }
+ if ((mode & TW_MOUSE)
+ && (fd = sp->_mouse_fd) >= 0) {
+ fds[count].fd = fd;
+ fds[count].events = POLLIN;
+ count++;
+ }
+#ifdef NCURSES_WGETCH_EVENTS
+ if ((mode & TW_EVENT) && evl) {
+ for (n = 0; n < evl->count; ++n) {
+ _nc_event *ev = evl->events[n];
+
+ if (ev->type == _NC_EVENT_FILE
+ && (ev->data.fev.flags & _NC_EVENT_FILE_READABLE)) {
+ fds[count].fd = ev->data.fev.fd;
fds[count].events = POLLIN;
count++;
+ }
}
- if ((mode & 2)
- && (fd = SP->_mouse_fd) >= 0) {
- fds[count].fd = fd;
- fds[count].events = POLLIN;
- count++;
+ }
+#endif
+
+ result = poll(fds, (unsigned) count, milliseconds);
+
+#ifdef NCURSES_WGETCH_EVENTS
+ if ((mode & TW_EVENT) && evl) {
+ int c;
+
+ if (!result)
+ count = 0;
+
+ for (n = 0; n < evl->count; ++n) {
+ _nc_event *ev = evl->events[n];
+
+ if (ev->type == _NC_EVENT_FILE
+ && (ev->data.fev.flags & _NC_EVENT_FILE_READABLE)) {
+ ev->data.fev.result = 0;
+ for (c = 0; c < count; c++)
+ if (fds[c].fd == ev->data.fev.fd
+ && fds[c].revents & POLLIN) {
+ ev->data.fev.result |= _NC_EVENT_FILE_READABLE;
+ evl->result_flags |= _NC_EVENT_FILE_READABLE;
+ }
+ } else if (ev->type == _NC_EVENT_TIMEOUT_MSEC
+ && !result && timeout_is_event) {
+ evl->result_flags |= _NC_EVENT_TIMEOUT_MSEC;
+ }
}
- result = poll(fds, count, milliseconds);
+ }
+
+ if (fds != fd_list)
+ free((char *) fds);
+
+#endif
#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;
+ /*
+ * 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.
+ *
+ * FIXME: this assumes mode&1 if milliseconds < 0 (see lib_getch.c).
+ */
+ result = TW_NONE;
+ if (mode & TW_INPUT) {
+ int step = (milliseconds < 0) ? 0 : 5000;
+ 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 += step) {
+ n = 0;
+ howmany = ioctl(0, 'ichr', &n);
+ if (howmany >= 0 && n > 0) {
+ result = 1;
+ break;
+ }
+ if (useconds > 1 && step > 0) {
+ snooze(step);
+ milliseconds -= (step / 1000);
+ if (milliseconds <= 0) {
+ milliseconds = 0;
+ break;
}
- } else if (milliseconds > 0) {
- snooze(milliseconds * 1000);
- milliseconds = 0;
+ }
}
+ } 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;
+ /*
+ * select() modifies the fd_set arguments; do this in the
+ * loop.
+ */
+ FD_ZERO(&set);
+
+ if (mode & TW_INPUT) {
+ FD_SET(sp->_ifd, &set);
+ count = sp->_ifd + 1;
+ }
+ if ((mode & TW_MOUSE)
+ && (fd = sp->_mouse_fd) >= 0) {
+ FD_SET(fd, &set);
+ count = max(fd, count) + 1;
+ }
+#ifdef NCURSES_WGETCH_EVENTS
+ if ((mode & TW_EVENT) && evl) {
+ for (n = 0; n < evl->count; ++n) {
+ _nc_event *ev = evl->events[n];
+
+ if (ev->type == _NC_EVENT_FILE
+ && (ev->data.fev.flags & _NC_EVENT_FILE_READABLE)) {
+ FD_SET(ev->data.fev.fd, &set);
+ count = max(ev->data.fev.fd + 1, count);
+ }
}
+ }
+#endif
+
+ 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);
+ }
+
+#ifdef NCURSES_WGETCH_EVENTS
+ if ((mode & TW_EVENT) && evl) {
+ evl->result_flags = 0;
+ for (n = 0; n < evl->count; ++n) {
+ _nc_event *ev = evl->events[n];
- 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);
+ if (ev->type == _NC_EVENT_FILE
+ && (ev->data.fev.flags & _NC_EVENT_FILE_READABLE)) {
+ ev->data.fev.result = 0;
+ if (FD_ISSET(ev->data.fev.fd, &set)) {
+ ev->data.fev.result |= _NC_EVENT_FILE_READABLE;
+ evl->result_flags |= _NC_EVENT_FILE_READABLE;
+ }
+ } else if (ev->type == _NC_EVENT_TIMEOUT_MSEC
+ && !result && timeout_is_event)
+ evl->result_flags |= _NC_EVENT_TIMEOUT_MSEC;
}
+ }
#endif
- returntime = _nc_gettime(FALSE);
+#endif /* USE_FUNC_POLL, etc */
- if (milliseconds >= 0)
- milliseconds -= (returntime - starttime);
+ returntime = _nc_gettime(&t0, FALSE);
+
+ if (milliseconds >= 0)
+ milliseconds -= (returntime - starttime);
+
+#ifdef NCURSES_WGETCH_EVENTS
+ if (evl) {
+ evl->result_flags = 0;
+ for (n = 0; n < evl->count; ++n) {
+ _nc_event *ev = evl->events[n];
+
+ if (ev->type == _NC_EVENT_TIMEOUT_MSEC) {
+ long diff = (returntime - starttime);
+ if (ev->data.timeout_msec <= diff)
+ ev->data.timeout_msec = 0;
+ else
+ ev->data.timeout_msec -= diff;
+ }
-#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 PRECISE_GETTIME && HAVE_NANOSLEEP
+ /*
+ * 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); /* FIXME: this won't be right if I recur! */
+ milliseconds -= 100;
+ goto retry;
+ }
+#endif
+
+ /* return approximate time left in milliseconds */
+ if (timeleft)
+ *timeleft = milliseconds;
+
+ TR(TRACE_IEVENT, ("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);
- }
- }
+ for (count = 0; count < MIN_FDS; count++) {
+ if ((mode & (1 << count))
+ && (fds[count].revents & POLLIN)) {
+ result |= (1 << count);
+ }
+ }
#elif defined(__BEOS__)
- result = 1; /* redundant, but simple */
+ result = TW_INPUT; /* 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;
+ if ((mode & TW_MOUSE)
+ && (fd = sp->_mouse_fd) >= 0
+ && FD_ISSET(fd, &set))
+ result |= TW_MOUSE;
+ if ((mode & TW_INPUT)
+ && FD_ISSET(sp->_ifd, &set))
+ result |= TW_INPUT;
+#endif
+ } else
+ result = 0;
+ }
+#ifdef NCURSES_WGETCH_EVENTS
+ if ((mode & TW_EVENT) && evl && evl->result_flags)
+ result |= TW_EVENT;
#endif
- }
- else
- result = 0;
- }
- return (result);
+ return (result);
}
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