+++ /dev/null
-/* -*-c-*-
- *
- * Packet-buffering select handler
- *
- * (c) 1999 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of the mLib utilities library.
- *
- * mLib is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * mLib 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with mLib; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <sys/types.h>
-#include <sys/time.h>
-#include <unistd.h>
-
-#include "pkbuf.h"
-#include "sel.h"
-#include "selpk.h"
-
-/*----- Main code ---------------------------------------------------------*/
-
-/* --- @selpk_enable@ --- *
- *
- * Arguments: @selpk *pk@ = pointer to buffer block
- *
- * Returns: ---
- *
- * Use: Enables a buffer for reading, and emits any queued packets
- * to the buffer's owner.
- */
-
-void selpk_enable(selpk *pk)
-{
- if (!(pk->pk.f & PKBUF_ENABLE)) {
- pk->pk.f |= PKBUF_ENABLE;
- sel_addfile(&pk->reader);
- pkbuf_flush(&pk->pk, 0, 0);
- }
-}
-
-/* --- @selpk_disable@ --- *
- *
- * Arguments: @selpk *pk@ = pointer to a buffer block
- *
- * Returns: ---
- *
- * Use: Disables a buffer. It won't be read from until it's
- * enabled again.
- */
-
-void selpk_disable(selpk *pk)
-{
- if (pk->pk.f & PKBUF_ENABLE) {
- pk->pk.f &= ~PKBUF_ENABLE;
- sel_rmfile(&pk->reader);
- }
-}
-
-/* --- @selpk_read@ --- *
- *
- * Arguments: @int fd@ = file descriptor to read from
- * @int mode@ = what we can do to the file
- * @void *vp@ = pointer to buffer context
- *
- * Returns: ---
- *
- * Use: Acts on the result of a @select@ call.
- */
-
-static void selpk_read(int fd, unsigned mode, void *vp)
-{
- selpk *pk = vp;
- octet *p;
- size_t sz;
- int n;
-
- sz = pkbuf_free(&pk->pk, &p);
- n = read(fd, p, sz);
- if (n == 0)
- pkbuf_close(&pk->pk);
- else if (n > 0)
- pkbuf_flush(&pk->pk, p, n);
- else switch (errno) {
- case EINTR:
- case EAGAIN:
-#if EAGAIN != EWOULDBLOCK
- case EWOULDBLOCK:
-#endif
- return;
- default:
- pkbuf_close(&pk->pk);
- }
-}
-
-/* --- @selpk_want@ --- *
- *
- * Arguments: @selpk *pk@ = pointer to buffer block
- * @size_t sz@ = size of buffer
- *
- * Returns: ---
- *
- * Use: Sets the size of the packet to be read next.
- */
-
-void selpk_want(selpk *pk, size_t sz)
-{
- pkbuf_want(&pk->pk, sz);
-}
-
-/* --- @selpk_init@ --- *
- *
- * Arguments: @selpk *pk@ = pointer to buffer block
- * @sel_state *s@ = pointer to select state to attach to
- * @int fd@ = file descriptor to listen to
- * @pkbuf_func *func@ = function to call
- * @void *p@ = argument for function
- *
- * Returns: ---
- *
- * Use: Initializes a buffer block.
- */
-
-void selpk_init(selpk *pk, sel_state *s, int fd, pkbuf_func *func, void *p)
-{
- pkbuf_init(&pk->pk, func, p);
- pk->pk.f &= ~PKBUF_ENABLE;
- sel_initfile(s, &pk->reader, fd, SEL_READ, selpk_read, pk);
- selpk_enable(pk);
-}
-
-/* --- @selpk_destroy@ --- *
- *
- * Arguments: @selpk *pk@ = pointer to buffer block
- *
- * Returns: ---
- *
- * Use: Deallocates a packet buffer and frees any resources it owned.
- */
-
-void selpk_destroy(selpk *pk)
-{
- selpk_disable(pk);
- pkbuf_destroy(&pk->pk);
-}
-
-/*----- That's all, folks -------------------------------------------------*/
~mdw / mLib / blobdiff