389 lines
10 KiB
C
389 lines
10 KiB
C
|
/*
|
||
|
|
* Copyright 2007-2012 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 "event2/event-config.h"
|
||
|
|
#include "evconfig-private.h"
|
||
|
|
|
||
|
|
#ifdef _WIN32
|
||
|
|
|
||
|
|
#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 "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"
|
||
|
|
#include "time-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 {
|
||
|
|
unsigned 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;
|
||
|
|
|
||
|
|
evutil_weakrand_seed_(&base->weakrand_seed, 0);
|
||
|
|
|
||
|
|
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 "EV_SOCK_FMT,
|
||
|
|
__func__, EV_SOCK_ARG(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 = tv ? evutil_tv_to_msec_(tv) : LONG_MAX;
|
||
|
|
/* 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 = evutil_weakrand_range_(&base->weakrand_seed,
|
||
|
|
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 = evutil_weakrand_range_(&base->weakrand_seed,
|
||
|
|
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 = evutil_weakrand_range_(&base->weakrand_seed,
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|