1 files changed, 0 insertions, 283 deletions
diff --git a/contrib/bind/lib/isc/ev_files.c b/contrib/bind/lib/isc/ev_files.c
deleted file mode 100644
index 3a6894b..0000000
--- a/contrib/bind/lib/isc/ev_files.c
+++ /dev/null
@@ -1,283 +0,0 @@
-/*
- * Copyright (c) 1995-1999 by Internet Software Consortium
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
- * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
- * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- */
-
-/* ev_files.c - implement asynch file IO for the eventlib
- * vix 11sep95 [initial]
- */
-
-#if !defined(LINT) && !defined(CODECENTER)
-static const char rcsid[] = "$Id: ev_files.c,v 1.22 2002/07/08 05:50:07 marka Exp $";
-#endif
-
-#include "port_before.h"
-#include "fd_setsize.h"
-
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/ioctl.h>
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <isc/eventlib.h>
-#include "eventlib_p.h"
-
-#include "port_after.h"
-
-static evFile *FindFD(const evContext_p *ctx, int fd, int eventmask);
-
-int
-evSelectFD(evContext opaqueCtx,
-	   int fd,
-	   int eventmask,
-	   evFileFunc func,
-	   void *uap,
-	   evFileID *opaqueID
-) {
-	evContext_p *ctx = opaqueCtx.opaque;
-	evFile *id;
-	int mode;
-
-	evPrintf(ctx, 1,
-		 "evSelectFD(ctx %p, fd %d, mask 0x%x, func %p, uap %p)\n",
-		 ctx, fd, eventmask, func, uap);
-	if (eventmask == 0 || (eventmask & ~EV_MASK_ALL) != 0)
-		EV_ERR(EINVAL);
-	if (fd > ctx->highestFD)
-		EV_ERR(EINVAL);
-	OK(mode = fcntl(fd, F_GETFL, NULL));	/* side effect: validate fd. */
-
-	/*
-	 * The first time we touch a file descriptor, we need to check to see
-	 * if the application already had it in O_NONBLOCK mode and if so, all
-	 * of our deselect()'s have to leave it in O_NONBLOCK.  If not, then
-	 * all but our last deselect() has to leave it in O_NONBLOCK.
-	 */
-	id = FindFD(ctx, fd, EV_MASK_ALL);
-	if (id == NULL) {
-		if (mode & PORT_NONBLOCK)
-			FD_SET(fd, &ctx->nonblockBefore);
-		else {
-#ifdef USE_FIONBIO_IOCTL
-			int on = 1;
-			OK(ioctl(fd, FIONBIO, (char *)&on));
-#else
-			OK(fcntl(fd, F_SETFL, mode | PORT_NONBLOCK));
-#endif
-			FD_CLR(fd, &ctx->nonblockBefore);
-		}
-	}
-
-	/*
-	 * If this descriptor is already in use, search for it again to see
-	 * if any of the eventmask bits we want to set are already captured.
-	 * We cannot usefully capture the same fd event more than once in the
-	 * same context.
-	 */
-	if (id != NULL && FindFD(ctx, fd, eventmask) != NULL)
-		EV_ERR(ETOOMANYREFS);
-
-	/* Allocate and fill. */
-	OKNEW(id);
-	id->func = func;
-	id->uap = uap;
-	id->fd = fd;
-	id->eventmask = eventmask;
-
-	/*
-	 * Insert at head.  Order could be important for performance if we
-	 * believe that evGetNext()'s accesses to the fd_sets will be more
-	 * serial and therefore more cache-lucky if the list is ordered by
-	 * ``fd.''  We do not believe these things, so we don't do it.
-	 *
-	 * The interesting sequence is where GetNext() has cached a select()
-	 * result and the caller decides to evSelectFD() on some descriptor.
-	 * Since GetNext() starts at the head, it can miss new entries we add
-	 * at the head.  This is not a serious problem since the event being
-	 * evSelectFD()'d for has to occur before evSelectFD() is called for
-	 * the file event to be considered "missed" -- a real corner case.
-	 * Maintaining a "tail" pointer for ctx->files would fix this, but I'm
-	 * not sure it would be ``more correct.''
-	 */
-	if (ctx->files != NULL)
-		ctx->files->prev = id;
-	id->prev = NULL;
-	id->next = ctx->files;
-	ctx->files = id;
-
-	/* Insert into fd table. */
-	if (ctx->fdTable[fd] != NULL)
-		ctx->fdTable[fd]->fdprev = id;
-	id->fdprev = NULL;
-	id->fdnext = ctx->fdTable[fd];
-	ctx->fdTable[fd] = id;
-
-	/* Turn on the appropriate bits in the {rd,wr,ex}Next fd_set's. */
-	if (eventmask & EV_READ)
-		FD_SET(fd, &ctx->rdNext);
-	if (eventmask & EV_WRITE)
-		FD_SET(fd, &ctx->wrNext);
-	if (eventmask & EV_EXCEPT)
-		FD_SET(fd, &ctx->exNext);
-
-	/* Update fdMax. */
-	if (fd > ctx->fdMax)
-		ctx->fdMax = fd;
-
-	/* Remember the ID if the caller provided us a place for it. */
-	if (opaqueID)
-		opaqueID->opaque = id;
-
-	evPrintf(ctx, 5,
-		"evSelectFD(fd %d, mask 0x%x): new masks: 0x%lx 0x%lx 0x%lx\n",
-		 fd, eventmask,
-		 (u_long)ctx->rdNext.fds_bits[0],
-		 (u_long)ctx->wrNext.fds_bits[0],
-		 (u_long)ctx->exNext.fds_bits[0]);
-
-	return (0);
-}
-
-int
-evDeselectFD(evContext opaqueCtx, evFileID opaqueID) {
-	evContext_p *ctx = opaqueCtx.opaque;
-	evFile *del = opaqueID.opaque;
-	evFile *cur;
-	int mode, eventmask;
-
-	if (!del) {
-		evPrintf(ctx, 11, "evDeselectFD(NULL) ignored\n");
-		errno = EINVAL;
-		return (-1);
-	}
-
-	evPrintf(ctx, 1, "evDeselectFD(fd %d, mask 0x%x)\n",
-		 del->fd, del->eventmask);
-
-	/* Get the mode.  Unless the file has been closed, errors are bad. */
-	mode = fcntl(del->fd, F_GETFL, NULL);
-	if (mode == -1 && errno != EBADF)
-		EV_ERR(errno);
-
-	/* Remove from the list of files. */
-	if (del->prev != NULL)
-		del->prev->next = del->next;
-	else
-		ctx->files = del->next;
-	if (del->next != NULL)
-		del->next->prev = del->prev;
-
-	/* Remove from the fd table. */
-	if (del->fdprev != NULL)
-		del->fdprev->fdnext = del->fdnext;
-	else
-		ctx->fdTable[del->fd] = del->fdnext;
-	if (del->fdnext != NULL)
-		del->fdnext->fdprev = del->fdprev;
-
-	/*
-	 * If the file descriptor does not appear in any other select() entry,
-	 * and if !EV_WASNONBLOCK, and if we got no EBADF when we got the mode
-	 * earlier, then: restore the fd to blocking status.
-	 */
-	if (!(cur = FindFD(ctx, del->fd, EV_MASK_ALL)) &&
-	    !FD_ISSET(del->fd, &ctx->nonblockBefore) &&
-	    mode != -1) {
-		/*
-		 * Note that we won't return an error status to the caller if
-		 * this fcntl() fails since (a) we've already done the work
-		 * and (b) the caller didn't ask us anything about O_NONBLOCK.
-		 */
-#ifdef USE_FIONBIO_IOCTL
-		int off = 1;
-		(void) ioctl(del->fd, FIONBIO, (char *)&off);
-#else
-		(void) fcntl(del->fd, F_SETFL, mode & ~PORT_NONBLOCK);
-#endif
-	}
-
-	/*
-	 * Now find all other uses of this descriptor and OR together an event
-	 * mask so that we don't turn off {rd,wr,ex}Next bits that some other
-	 * file event is using.  As an optimization, stop if the event mask
-	 * fills.
-	 */
-	eventmask = 0;
-	for ((void)NULL;
-	     cur != NULL && eventmask != EV_MASK_ALL;
-	     cur = cur->next)
-		if (cur->fd == del->fd)
-			eventmask |= cur->eventmask;
-
-	/* OK, now we know which bits we can clear out. */
-	if (!(eventmask & EV_READ)) {
-		FD_CLR(del->fd, &ctx->rdNext);
-		if (FD_ISSET(del->fd, &ctx->rdLast)) {
-			FD_CLR(del->fd, &ctx->rdLast);
-			ctx->fdCount--;
-		}
-	}
-	if (!(eventmask & EV_WRITE)) {
-		FD_CLR(del->fd, &ctx->wrNext);
-		if (FD_ISSET(del->fd, &ctx->wrLast)) {
-			FD_CLR(del->fd, &ctx->wrLast);
-			ctx->fdCount--;
-		}
-	}
-	if (!(eventmask & EV_EXCEPT)) {
-		FD_CLR(del->fd, &ctx->exNext);
-		if (FD_ISSET(del->fd, &ctx->exLast)) {
-			FD_CLR(del->fd, &ctx->exLast);
-			ctx->fdCount--;
-		}
-	}
-
-	/* If this was the maxFD, find the new one. */
-	if (del->fd == ctx->fdMax) {
-		ctx->fdMax = -1;
-		for (cur = ctx->files; cur; cur = cur->next)
-			if (cur->fd > ctx->fdMax)
-				ctx->fdMax = cur->fd;
-	}
-
-	/* If this was the fdNext, cycle that to the next entry. */
-	if (del == ctx->fdNext)
-		ctx->fdNext = del->next;
-
-	evPrintf(ctx, 5,
-	      "evDeselectFD(fd %d, mask 0x%x): new masks: 0x%lx 0x%lx 0x%lx\n",
-		 del->fd, eventmask,
-		 (u_long)ctx->rdNext.fds_bits[0],
-		 (u_long)ctx->wrNext.fds_bits[0],
-		 (u_long)ctx->exNext.fds_bits[0]);
-
-	/* Couldn't free it before now since we were using fields out of it. */
-	FREE(del);
-
-	return (0);
-}
-
-static evFile *
-FindFD(const evContext_p *ctx, int fd, int eventmask) {
-	evFile *id;
-
-	for (id = ctx->fdTable[fd]; id != NULL; id = id->fdnext)
-		if (id->fd == fd && (id->eventmask & eventmask) != 0)
-			break;
-	return (id);
-}