mirror of
https://github.com/rspamd/rspamd.git
synced 2024-08-19 02:10:31 +02:00
317 lines
8.6 KiB
C
317 lines
8.6 KiB
C
/*
|
|
* libev select fd activity backend
|
|
*
|
|
* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modifica-
|
|
* tion, 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
|
|
* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
|
|
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
|
|
* CIAL, 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 OTH-
|
|
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* the GNU General Public License ("GPL") version 2 or any later version,
|
|
* in which case the provisions of the GPL are applicable instead of
|
|
* the above. If you wish to allow the use of your version of this file
|
|
* only under the terms of the GPL and not to allow others to use your
|
|
* version of this file under the BSD license, indicate your decision
|
|
* by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL. If you do not delete the
|
|
* provisions above, a recipient may use your version of this file under
|
|
* either the BSD or the GPL.
|
|
*/
|
|
|
|
#ifndef _WIN32
|
|
/* for unix systems */
|
|
# include <inttypes.h>
|
|
# ifndef __hpux
|
|
/* for REAL unix systems */
|
|
# include <sys/select.h>
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef EV_SELECT_USE_FD_SET
|
|
# ifdef NFDBITS
|
|
# define EV_SELECT_USE_FD_SET 0
|
|
# else
|
|
# define EV_SELECT_USE_FD_SET 1
|
|
# endif
|
|
#endif
|
|
|
|
#if EV_SELECT_IS_WINSOCKET
|
|
# undef EV_SELECT_USE_FD_SET
|
|
# define EV_SELECT_USE_FD_SET 1
|
|
# undef NFDBITS
|
|
# define NFDBITS 0
|
|
#endif
|
|
|
|
#if !EV_SELECT_USE_FD_SET
|
|
# define NFDBYTES (NFDBITS / 8)
|
|
#endif
|
|
|
|
#include <string.h>
|
|
|
|
static void
|
|
select_modify (EV_P_ int fd, int oev, int nev)
|
|
{
|
|
if (oev == nev)
|
|
return;
|
|
|
|
{
|
|
#if EV_SELECT_USE_FD_SET
|
|
|
|
#if EV_SELECT_IS_WINSOCKET
|
|
SOCKET handle = anfds [fd].handle;
|
|
#else
|
|
int handle = fd;
|
|
#endif
|
|
|
|
assert (("libev: fd >= FD_SETSIZE passed to fd_set-based select backend", fd < FD_SETSIZE));
|
|
|
|
/* FD_SET is broken on windows (it adds the fd to a set twice or more,
|
|
* which eventually leads to overflows). Need to call it only on changes.
|
|
*/
|
|
#if EV_SELECT_IS_WINSOCKET
|
|
if ((oev ^ nev) & EV_READ)
|
|
#endif
|
|
if (nev & EV_READ)
|
|
FD_SET (handle, (fd_set *)vec_ri);
|
|
else
|
|
FD_CLR (handle, (fd_set *)vec_ri);
|
|
|
|
#if EV_SELECT_IS_WINSOCKET
|
|
if ((oev ^ nev) & EV_WRITE)
|
|
#endif
|
|
if (nev & EV_WRITE)
|
|
FD_SET (handle, (fd_set *)vec_wi);
|
|
else
|
|
FD_CLR (handle, (fd_set *)vec_wi);
|
|
|
|
#else
|
|
|
|
int word = fd / NFDBITS;
|
|
fd_mask mask = 1UL << (fd % NFDBITS);
|
|
|
|
if (expect_false (vec_max <= word))
|
|
{
|
|
int new_max = word + 1;
|
|
|
|
vec_ri = ev_realloc (vec_ri, new_max * NFDBYTES);
|
|
vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */
|
|
vec_wi = ev_realloc (vec_wi, new_max * NFDBYTES);
|
|
vec_wo = ev_realloc (vec_wo, new_max * NFDBYTES); /* could free/malloc */
|
|
#ifdef _WIN32
|
|
vec_eo = ev_realloc (vec_eo, new_max * NFDBYTES); /* could free/malloc */
|
|
#endif
|
|
|
|
for (; vec_max < new_max; ++vec_max)
|
|
((fd_mask *)vec_ri) [vec_max] =
|
|
((fd_mask *)vec_wi) [vec_max] = 0;
|
|
}
|
|
|
|
((fd_mask *)vec_ri) [word] |= mask;
|
|
if (!(nev & EV_READ))
|
|
((fd_mask *)vec_ri) [word] &= ~mask;
|
|
|
|
((fd_mask *)vec_wi) [word] |= mask;
|
|
if (!(nev & EV_WRITE))
|
|
((fd_mask *)vec_wi) [word] &= ~mask;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static void
|
|
select_poll (EV_P_ ev_tstamp timeout)
|
|
{
|
|
struct timeval tv;
|
|
int res;
|
|
int fd_setsize;
|
|
|
|
EV_RELEASE_CB;
|
|
EV_TV_SET (tv, timeout);
|
|
|
|
#if EV_SELECT_USE_FD_SET
|
|
fd_setsize = sizeof (fd_set);
|
|
#else
|
|
fd_setsize = vec_max * NFDBYTES;
|
|
#endif
|
|
|
|
memcpy (vec_ro, vec_ri, fd_setsize);
|
|
memcpy (vec_wo, vec_wi, fd_setsize);
|
|
|
|
#ifdef _WIN32
|
|
/* pass in the write set as except set.
|
|
* the idea behind this is to work around a windows bug that causes
|
|
* errors to be reported as an exception and not by setting
|
|
* the writable bit. this is so uncontrollably lame.
|
|
*/
|
|
memcpy (vec_eo, vec_wi, fd_setsize);
|
|
res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, (fd_set *)vec_eo, &tv);
|
|
#elif EV_SELECT_USE_FD_SET
|
|
fd_setsize = anfdmax < FD_SETSIZE ? anfdmax : FD_SETSIZE;
|
|
res = select (fd_setsize, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
|
|
#else
|
|
res = select (vec_max * NFDBITS, (fd_set *)vec_ro, (fd_set *)vec_wo, 0, &tv);
|
|
#endif
|
|
EV_ACQUIRE_CB;
|
|
|
|
if (expect_false (res < 0))
|
|
{
|
|
#if EV_SELECT_IS_WINSOCKET
|
|
errno = WSAGetLastError ();
|
|
#endif
|
|
#ifdef WSABASEERR
|
|
/* on windows, select returns incompatible error codes, fix this */
|
|
if (errno >= WSABASEERR && errno < WSABASEERR + 1000)
|
|
if (errno == WSAENOTSOCK)
|
|
errno = EBADF;
|
|
else
|
|
errno -= WSABASEERR;
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
/* select on windows erroneously returns EINVAL when no fd sets have been
|
|
* provided (this is documented). what microsoft doesn't tell you that this bug
|
|
* exists even when the fd sets _are_ provided, so we have to check for this bug
|
|
* here and emulate by sleeping manually.
|
|
* we also get EINVAL when the timeout is invalid, but we ignore this case here
|
|
* and assume that EINVAL always means: you have to wait manually.
|
|
*/
|
|
if (errno == EINVAL)
|
|
{
|
|
if (timeout)
|
|
{
|
|
unsigned long ms = timeout * 1e3;
|
|
Sleep (ms ? ms : 1);
|
|
}
|
|
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
if (errno == EBADF)
|
|
fd_ebadf (EV_A);
|
|
else if (errno == ENOMEM && !syserr_cb)
|
|
fd_enomem (EV_A);
|
|
else if (errno != EINTR)
|
|
ev_syserr ("(libev) select");
|
|
|
|
return;
|
|
}
|
|
|
|
#if EV_SELECT_USE_FD_SET
|
|
|
|
{
|
|
int fd;
|
|
|
|
for (fd = 0; fd < anfdmax; ++fd)
|
|
if (anfds [fd].events)
|
|
{
|
|
int events = 0;
|
|
#if EV_SELECT_IS_WINSOCKET
|
|
SOCKET handle = anfds [fd].handle;
|
|
#else
|
|
int handle = fd;
|
|
#endif
|
|
|
|
if (FD_ISSET (handle, (fd_set *)vec_ro)) events |= EV_READ;
|
|
if (FD_ISSET (handle, (fd_set *)vec_wo)) events |= EV_WRITE;
|
|
#ifdef _WIN32
|
|
if (FD_ISSET (handle, (fd_set *)vec_eo)) events |= EV_WRITE;
|
|
#endif
|
|
|
|
if (expect_true (events))
|
|
fd_event (EV_A_ fd, events);
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
{
|
|
int word, bit;
|
|
for (word = vec_max; word--; )
|
|
{
|
|
fd_mask word_r = ((fd_mask *)vec_ro) [word];
|
|
fd_mask word_w = ((fd_mask *)vec_wo) [word];
|
|
#ifdef _WIN32
|
|
word_w |= ((fd_mask *)vec_eo) [word];
|
|
#endif
|
|
|
|
if (word_r || word_w)
|
|
for (bit = NFDBITS; bit--; )
|
|
{
|
|
fd_mask mask = 1UL << bit;
|
|
int events = 0;
|
|
|
|
events |= word_r & mask ? EV_READ : 0;
|
|
events |= word_w & mask ? EV_WRITE : 0;
|
|
|
|
if (expect_true (events))
|
|
fd_event (EV_A_ word * NFDBITS + bit, events);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
}
|
|
|
|
inline_size
|
|
int
|
|
select_init (EV_P_ int flags)
|
|
{
|
|
backend_mintime = 1e-6;
|
|
backend_modify = select_modify;
|
|
backend_poll = select_poll;
|
|
|
|
#if EV_SELECT_USE_FD_SET
|
|
vec_ri = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_ri);
|
|
vec_ro = ev_malloc (sizeof (fd_set));
|
|
vec_wi = ev_malloc (sizeof (fd_set)); FD_ZERO ((fd_set *)vec_wi);
|
|
vec_wo = ev_malloc (sizeof (fd_set));
|
|
#ifdef _WIN32
|
|
vec_eo = ev_malloc (sizeof (fd_set));
|
|
#endif
|
|
#else
|
|
vec_max = 0;
|
|
vec_ri = 0;
|
|
vec_ro = 0;
|
|
vec_wi = 0;
|
|
vec_wo = 0;
|
|
#ifdef _WIN32
|
|
vec_eo = 0;
|
|
#endif
|
|
#endif
|
|
|
|
return EVBACKEND_SELECT;
|
|
}
|
|
|
|
inline_size
|
|
void
|
|
select_destroy (EV_P)
|
|
{
|
|
ev_free (vec_ri);
|
|
ev_free (vec_ro);
|
|
ev_free (vec_wi);
|
|
ev_free (vec_wo);
|
|
#ifdef _WIN32
|
|
ev_free (vec_eo);
|
|
#endif
|
|
}
|
|
|