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fdpoll.c
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fdpoll.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* Cherokee
*
* Authors:
* Alvaro Lopez Ortega <alvaro@alobbs.com>
*
* Copyright (C) 2001-2014 Alvaro Lopez Ortega
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include "common-internal.h"
#include "fdpoll-protected.h"
#include "bogotime.h"
#include "init.h"
#include "util.h"
#define ENTRIES "fdpoll"
/* Returns max. fd limits (system and fdpoll set).
* NOTE: 0 means unlimited,
* > 0 max. acceptable limit for cherokee_fdpoll_new().
*/
ret_t
cherokee_fdpoll_get_fdlimits (cherokee_poll_type_t type, cuint_t *sys_fd_limit, cuint_t *fd_limit)
{
/* Initialize values.
*/
*fd_limit = 0;
*sys_fd_limit = 0;
/* Call the proper method to get system and per fdpoll set limits.
*/
switch (type) {
case cherokee_poll_epoll:
#ifdef HAVE_EPOLL
return fdpoll_epoll_get_fdlimits (sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
case cherokee_poll_kqueue:
#if HAVE_KQUEUE
return fdpoll_kqueue_get_fdlimits (sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
case cherokee_poll_port:
#ifdef HAVE_PORT
return fdpoll_port_get_fdlimits (sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
case cherokee_poll_poll:
#if HAVE_POLL
return fdpoll_poll_get_fdlimits (sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
case cherokee_poll_select:
#if HAVE_SELECT
return fdpoll_select_get_fdlimits (sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
default:
SHOULDNT_HAPPEN;
return ret_error;
}
/* NOTREACHED */
}
ret_t
cherokee_fdpoll_new (cherokee_fdpoll_t **fdp,
cherokee_poll_type_t type,
int sys_fd_limit,
int fd_limit)
{
/* Set default values if needed
*/
if (sys_fd_limit == -1) {
sys_fd_limit = cherokee_fdlimit;
}
if (fd_limit == -1) {
fd_limit = sys_fd_limit;
}
/* Sanity check
*/
if ((sys_fd_limit < fd_limit) ||
(sys_fd_limit < FD_NUM_MIN_AVAILABLE))
{
return ret_error;
}
switch (type) {
case cherokee_poll_epoll:
#ifdef HAVE_EPOLL
return fdpoll_epoll_new (fdp, sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
case cherokee_poll_kqueue:
#if HAVE_KQUEUE
return fdpoll_kqueue_new (fdp, sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
case cherokee_poll_port:
#ifdef HAVE_PORT
return fdpoll_port_new (fdp, sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
case cherokee_poll_poll:
#if HAVE_POLL
return fdpoll_poll_new (fdp, sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
case cherokee_poll_select:
#if HAVE_SELECT
return fdpoll_select_new (fdp, sys_fd_limit, fd_limit);
#else
return ret_no_sys;
#endif
default:
SHOULDNT_HAPPEN;
return ret_error;
}
/* NOTREACHED */
}
ret_t
cherokee_fdpoll_best_new (cherokee_fdpoll_t **fdp, int sys_limit, int limit)
{
ret_t ret;
ret = cherokee_fdpoll_new (fdp, cherokee_poll_epoll, sys_limit, limit);
if (ret == ret_ok) return ret_ok;
ret = cherokee_fdpoll_new (fdp, cherokee_poll_kqueue, sys_limit, limit);
if (ret == ret_ok) return ret_ok;
ret = cherokee_fdpoll_new (fdp, cherokee_poll_poll, sys_limit, limit);
if (ret == ret_ok) return ret_ok;
ret = cherokee_fdpoll_new (fdp, cherokee_poll_port, sys_limit, limit);
if (ret == ret_ok) return ret_ok;
ret = cherokee_fdpoll_new (fdp, cherokee_poll_select, sys_limit, limit);
if (ret == ret_ok) return ret_ok;
SHOULDNT_HAPPEN;
return ret_error;
}
ret_t
cherokee_fdpoll_get_method (cherokee_fdpoll_t *fdp, cherokee_poll_type_t *type)
{
*type = fdp->type;
return ret_ok;
}
ret_t
cherokee_fdpoll_get_method_str (cherokee_fdpoll_t *fdp, const char **str)
{
switch (fdp->type) {
case cherokee_poll_epoll:
*str = "epoll";
break;
case cherokee_poll_kqueue:
*str = "kqueue";
break;
case cherokee_poll_port:
*str = "ports";
break;
case cherokee_poll_poll:
*str = "poll";
break;
case cherokee_poll_select:
*str = "select";
break;
default:
SHOULDNT_HAPPEN;
*str = "unknown";
return ret_error;
}
return ret_ok;
}
/* Given a string poll type, returns the poll type.
*/
ret_t
cherokee_fdpoll_str_to_method (char *str, cherokee_poll_type_t *poll_type)
{
if (equal_str(str, "epoll")) {
*poll_type = cherokee_poll_epoll;
return ret_ok;
}
if (equal_str(str, "kqueue")) {
*poll_type = cherokee_poll_kqueue;
return ret_ok;
}
if (equal_str(str, "port")) {
*poll_type = cherokee_poll_port;
return ret_ok;
}
if (equal_str(str, "poll")) {
*poll_type = cherokee_poll_poll;
return ret_ok;
}
if (equal_str(str, "select")) {
*poll_type = cherokee_poll_select;
return ret_ok;
}
/* Unknown type
*/
return ret_error;
}
int
cherokee_fdpoll_is_empty (cherokee_fdpoll_t *fdp)
{
return (fdp->npollfds <= 0);
}
ret_t
cherokee_fdpoll_is_full (cherokee_fdpoll_t *fdp)
{
return (fdp->npollfds >= fdp->nfiles);
}
/* Virtual methods
*/
ret_t
cherokee_fdpoll_free (cherokee_fdpoll_t *fdp)
{
return fdp->free (fdp);
}
ret_t
cherokee_fdpoll_add (cherokee_fdpoll_t *fdp, int fd, int rw)
{
return fdp->add (fdp, fd, rw);
}
ret_t
cherokee_fdpoll_del (cherokee_fdpoll_t *fdp, int fd)
{
return fdp->del (fdp, fd);
}
ret_t
cherokee_fdpoll_reset (cherokee_fdpoll_t *fdp, int fd)
{
return fdp->reset (fdp, fd);
}
ret_t
cherokee_fdpoll_set_mode (cherokee_fdpoll_t *fdp, int fd, int rw)
{
return fdp->set_mode (fdp, fd, rw);
}
int
cherokee_fdpoll_check (cherokee_fdpoll_t *fdp, int fd, int rw)
{
return fdp->check (fdp, fd, rw);
}
int
cherokee_fdpoll_watch (cherokee_fdpoll_t *fdp, int timeout_msecs)
{
#ifdef TRACE_ENABLED
int re;
cherokee_msec_t start;
if (cherokee_trace_is_tracing()) {
cherokee_bogotime_update();
start = cherokee_bogonow_msec;
re = fdp->watch (fdp, timeout_msecs);
cherokee_bogotime_update();
TRACE(ENTRIES, "Watch (took %d msecs ~ limit %d msecs)\n",
cherokee_bogonow_msec - start, timeout_msecs);
return re;
}
#endif
return fdp->watch (fdp, timeout_msecs);
}