+++ /dev/null
-/*
- * Copyright 2007-2010 Niels Provos and Nick Mathewson
- * Copyright 2000-2007 Niels Provos <provos@citi.umich.edu>
- * Copyright 2003 Michael A. Davis <mike@datanerds.net>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <winsock2.h>
-#include <windows.h>
-#include <sys/types.h>
-#include <sys/queue.h>
-#include <limits.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-
-#include "event2/util.h"
-#include "event2/event-config.h"
-#include "util-internal.h"
-#include "log-internal.h"
-#include "event2/event.h"
-#include "event-internal.h"
-#include "evmap-internal.h"
-#include "event2/thread.h"
-#include "evthread-internal.h"
-
-#define XFREE(ptr) do { if (ptr) mm_free(ptr); } while (0)
-
-extern struct event_list timequeue;
-extern struct event_list addqueue;
-
-struct win_fd_set {
- u_int fd_count;
- SOCKET fd_array[1];
-};
-
-/* MSDN says this is required to handle SIGFPE */
-volatile double SIGFPE_REQ = 0.0f;
-
-struct idx_info {
- int read_pos_plus1;
- int write_pos_plus1;
-};
-
-struct win32op {
- unsigned num_fds_in_fd_sets;
- int resize_out_sets;
- struct win_fd_set *readset_in;
- struct win_fd_set *writeset_in;
- struct win_fd_set *readset_out;
- struct win_fd_set *writeset_out;
- struct win_fd_set *exset_out;
- unsigned signals_are_broken : 1;
-};
-
-static void *win32_init(struct event_base *);
-static int win32_add(struct event_base *, evutil_socket_t, short old, short events, void *_idx);
-static int win32_del(struct event_base *, evutil_socket_t, short old, short events, void *_idx);
-static int win32_dispatch(struct event_base *base, struct timeval *);
-static void win32_dealloc(struct event_base *);
-
-struct eventop win32ops = {
- "win32",
- win32_init,
- win32_add,
- win32_del,
- win32_dispatch,
- win32_dealloc,
- 0, /* doesn't need reinit */
- 0, /* No features supported. */
- sizeof(struct idx_info),
-};
-
-#define FD_SET_ALLOC_SIZE(n) ((sizeof(struct win_fd_set) + ((n)-1)*sizeof(SOCKET)))
-
-static int
-grow_fd_sets(struct win32op *op, unsigned new_num_fds)
-{
- size_t size;
-
- EVUTIL_ASSERT(new_num_fds >= op->readset_in->fd_count &&
- new_num_fds >= op->writeset_in->fd_count);
- EVUTIL_ASSERT(new_num_fds >= 1);
-
- size = FD_SET_ALLOC_SIZE(new_num_fds);
- if (!(op->readset_in = mm_realloc(op->readset_in, size)))
- return (-1);
- if (!(op->writeset_in = mm_realloc(op->writeset_in, size)))
- return (-1);
- op->resize_out_sets = 1;
- op->num_fds_in_fd_sets = new_num_fds;
- return (0);
-}
-
-static int
-do_fd_set(struct win32op *op, struct idx_info *ent, evutil_socket_t s, int read)
-{
- struct win_fd_set *set = read ? op->readset_in : op->writeset_in;
- if (read) {
- if (ent->read_pos_plus1 > 0)
- return (0);
- } else {
- if (ent->write_pos_plus1 > 0)
- return (0);
- }
- if (set->fd_count == op->num_fds_in_fd_sets) {
- if (grow_fd_sets(op, op->num_fds_in_fd_sets*2))
- return (-1);
- /* set pointer will have changed and needs reiniting! */
- set = read ? op->readset_in : op->writeset_in;
- }
- set->fd_array[set->fd_count] = s;
- if (read)
- ent->read_pos_plus1 = set->fd_count+1;
- else
- ent->write_pos_plus1 = set->fd_count+1;
- return (set->fd_count++);
-}
-
-static int
-do_fd_clear(struct event_base *base,
- struct win32op *op, struct idx_info *ent, int read)
-{
- int i;
- struct win_fd_set *set = read ? op->readset_in : op->writeset_in;
- if (read) {
- i = ent->read_pos_plus1 - 1;
- ent->read_pos_plus1 = 0;
- } else {
- i = ent->write_pos_plus1 - 1;
- ent->write_pos_plus1 = 0;
- }
- if (i < 0)
- return (0);
- if (--set->fd_count != (unsigned)i) {
- struct idx_info *ent2;
- SOCKET s2;
- s2 = set->fd_array[i] = set->fd_array[set->fd_count];
-
- ent2 = evmap_io_get_fdinfo(&base->io, s2);
-
- if (!ent2) /* This indicates a bug. */
- return (0);
- if (read)
- ent2->read_pos_plus1 = i+1;
- else
- ent2->write_pos_plus1 = i+1;
- }
- return (0);
-}
-
-#define NEVENT 32
-void *
-win32_init(struct event_base *_base)
-{
- struct win32op *winop;
- size_t size;
- if (!(winop = mm_calloc(1, sizeof(struct win32op))))
- return NULL;
- winop->num_fds_in_fd_sets = NEVENT;
- size = FD_SET_ALLOC_SIZE(NEVENT);
- if (!(winop->readset_in = mm_malloc(size)))
- goto err;
- if (!(winop->writeset_in = mm_malloc(size)))
- goto err;
- if (!(winop->readset_out = mm_malloc(size)))
- goto err;
- if (!(winop->writeset_out = mm_malloc(size)))
- goto err;
- if (!(winop->exset_out = mm_malloc(size)))
- goto err;
- winop->readset_in->fd_count = winop->writeset_in->fd_count = 0;
- winop->readset_out->fd_count = winop->writeset_out->fd_count
- = winop->exset_out->fd_count = 0;
-
- if (evsig_init(_base) < 0)
- winop->signals_are_broken = 1;
-
- return (winop);
- err:
- XFREE(winop->readset_in);
- XFREE(winop->writeset_in);
- XFREE(winop->readset_out);
- XFREE(winop->writeset_out);
- XFREE(winop->exset_out);
- XFREE(winop);
- return (NULL);
-}
-
-int
-win32_add(struct event_base *base, evutil_socket_t fd,
- short old, short events, void *_idx)
-{
- struct win32op *win32op = base->evbase;
- struct idx_info *idx = _idx;
-
- if ((events & EV_SIGNAL) && win32op->signals_are_broken)
- return (-1);
-
- if (!(events & (EV_READ|EV_WRITE)))
- return (0);
-
- event_debug(("%s: adding event for %d", __func__, (int)fd));
- if (events & EV_READ) {
- if (do_fd_set(win32op, idx, fd, 1)<0)
- return (-1);
- }
- if (events & EV_WRITE) {
- if (do_fd_set(win32op, idx, fd, 0)<0)
- return (-1);
- }
- return (0);
-}
-
-int
-win32_del(struct event_base *base, evutil_socket_t fd, short old, short events,
- void *_idx)
-{
- struct win32op *win32op = base->evbase;
- struct idx_info *idx = _idx;
-
- event_debug(("%s: Removing event for %d", __func__, fd));
- if (events & EV_READ)
- do_fd_clear(base, win32op, idx, 1);
- if (events & EV_WRITE)
- do_fd_clear(base, win32op, idx, 0);
-
- return 0;
-}
-
-static void
-fd_set_copy(struct win_fd_set *out, const struct win_fd_set *in)
-{
- out->fd_count = in->fd_count;
- memcpy(out->fd_array, in->fd_array, in->fd_count * (sizeof(SOCKET)));
-}
-
-/*
- static void dump_fd_set(struct win_fd_set *s)
- {
- unsigned int i;
- printf("[ ");
- for(i=0;i<s->fd_count;++i)
- printf("%d ",(int)s->fd_array[i]);
- printf("]\n");
- }
-*/
-
-int
-win32_dispatch(struct event_base *base, struct timeval *tv)
-{
- struct win32op *win32op = base->evbase;
- int res = 0;
- unsigned j, i;
- int fd_count;
- SOCKET s;
-
- if (win32op->resize_out_sets) {
- size_t size = FD_SET_ALLOC_SIZE(win32op->num_fds_in_fd_sets);
- if (!(win32op->readset_out = mm_realloc(win32op->readset_out, size)))
- return (-1);
- if (!(win32op->exset_out = mm_realloc(win32op->exset_out, size)))
- return (-1);
- if (!(win32op->writeset_out = mm_realloc(win32op->writeset_out, size)))
- return (-1);
- win32op->resize_out_sets = 0;
- }
-
- fd_set_copy(win32op->readset_out, win32op->readset_in);
- fd_set_copy(win32op->exset_out, win32op->writeset_in);
- fd_set_copy(win32op->writeset_out, win32op->writeset_in);
-
- fd_count =
- (win32op->readset_out->fd_count > win32op->writeset_out->fd_count) ?
- win32op->readset_out->fd_count : win32op->writeset_out->fd_count;
-
- if (!fd_count) {
- long msec = evutil_tv_to_msec(tv);
- /* Sleep's DWORD argument is unsigned long */
- if (msec < 0)
- msec = LONG_MAX;
- /* Windows doesn't like you to call select() with no sockets */
- Sleep(msec);
- return (0);
- }
-
- EVBASE_RELEASE_LOCK(base, th_base_lock);
-
- res = select(fd_count,
- (struct fd_set*)win32op->readset_out,
- (struct fd_set*)win32op->writeset_out,
- (struct fd_set*)win32op->exset_out, tv);
-
- EVBASE_ACQUIRE_LOCK(base, th_base_lock);
-
- event_debug(("%s: select returned %d", __func__, res));
-
- if (res <= 0) {
- return res;
- }
-
- if (win32op->readset_out->fd_count) {
- i = rand() % win32op->readset_out->fd_count;
- for (j=0; j<win32op->readset_out->fd_count; ++j) {
- if (++i >= win32op->readset_out->fd_count)
- i = 0;
- s = win32op->readset_out->fd_array[i];
- evmap_io_active(base, s, EV_READ);
- }
- }
- if (win32op->exset_out->fd_count) {
- i = rand() % win32op->exset_out->fd_count;
- for (j=0; j<win32op->exset_out->fd_count; ++j) {
- if (++i >= win32op->exset_out->fd_count)
- i = 0;
- s = win32op->exset_out->fd_array[i];
- evmap_io_active(base, s, EV_WRITE);
- }
- }
- if (win32op->writeset_out->fd_count) {
- SOCKET s;
- i = rand() % win32op->writeset_out->fd_count;
- for (j=0; j<win32op->writeset_out->fd_count; ++j) {
- if (++i >= win32op->writeset_out->fd_count)
- i = 0;
- s = win32op->writeset_out->fd_array[i];
- evmap_io_active(base, s, EV_WRITE);
- }
- }
- return (0);
-}
-
-void
-win32_dealloc(struct event_base *_base)
-{
- struct win32op *win32op = _base->evbase;
-
- evsig_dealloc(_base);
- if (win32op->readset_in)
- mm_free(win32op->readset_in);
- if (win32op->writeset_in)
- mm_free(win32op->writeset_in);
- if (win32op->readset_out)
- mm_free(win32op->readset_out);
- if (win32op->writeset_out)
- mm_free(win32op->writeset_out);
- if (win32op->exset_out)
- mm_free(win32op->exset_out);
- /* XXXXX free the tree. */
-
- memset(win32op, 0, sizeof(win32op));
- mm_free(win32op);
-}
projects / netatalk.git / blobdiff