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/** BEGIN COPYRIGHT BLOCK
* This Program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; version 2 of the License.
*
* 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., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/*
* poll_using_select.c
*
* poll_using_select() is an implementation of poll using select.
* I borrowed this code from the client source, ns/nspr/src/mdunix.c
* from the Nav404_OEM_BRANCH
*
* The reason we need this is on Linux 2.0 (and possibly other platforms)
* there is no poll. ldapserver/ldap/servers/slapd/daemon.c calls poll
*
* In Linux 2.1 there will be a native poll, so this will go away for Linux
* but other platforms may need it.
*
* 1-30-98
* sspitzer
*/
#include "poll_using_select.h"
int
poll_using_select(struct my_pollfd *filed, int nfds, int timeout)
{
int width;
fd_set rd;
fd_set wr;
fd_set ex;
struct timeval tv;
int a, b, retval;
#ifdef DEBUG_POLL_AS_SELECT
LDAPDebug(LDAP_DEBUG_ANY, "poll convert nfds=%d, timeout=%d\n", nfds, timeout,0);
#endif /* DEBUG_POLL_AS_SELECT */
FD_ZERO( &rd );
FD_ZERO( &wr );
FD_ZERO( &ex );
/*
* If the fd member of all pollfd structures is less than 0,
* the poll() function will return 0 and have no other results.
*/
for(a=0, b=0; a<nfds; a++){
if( filed[a].fd >= 0 ) b++;
}
if( b == 0 ){ return 0; }
for( width=0,a=0; a<nfds; a++ ){
short temp_events;
#ifdef DEBUG_POLL_AS_SELECT
if (filed[a].events != 0) {
LDAPDebug(LDAP_DEBUG_ANY, "poll events = %d for fd=%d\n", filed[a].events, filed[a].fd,0);
}
#endif /* DEBUG_POLL_AS_SELECT */
temp_events = filed[a].events;
filed[a].revents = 0;
if( temp_events & POLLIN ) FD_SET( filed[a].fd, &rd );
if( temp_events & POLLOUT ) FD_SET( filed[a].fd, &wr );
if( temp_events & POLLPRI ) FD_SET( filed[a].fd, &ex );
temp_events &= ~(POLLIN|POLLOUT|POLLPRI);
#ifdef DEBUG_POLL_AS_SELECT
if( temp_events != 0 ){
LDAPDebug(LDAP_DEBUG_ANY, "Unhandled poll event type=0x%x on FD(%d)\n",filed[a].events,filed[a].fd,0);
}
#endif /* DEBUG_POLL_AS_SELECT */
width = width>(filed[a].fd+1)?width:(filed[a].fd+1);
}
if( timeout != -1 ){
tv.tv_sec = timeout/MSECONDS;
tv.tv_usec= timeout%MSECONDS;
retval = select ( width, &rd, &wr, &ex, &tv );
}
else
{
retval = select ( width, &rd, &wr, &ex, 0 );
}
if( retval <= 0 ) return( retval );
#ifdef DEBUG_POLL_AS_SELECT
LDAPDebug(LDAP_DEBUG_ANY, "For\n",0,0,0);
#endif /* DEBUG_POLL_AS_SELECT */
for( b=0; b<nfds;b++){
if( filed[b].fd >= 0 ){
a = filed[b].fd;
if( FD_ISSET( a, &rd )) filed[b].revents |= POLLIN;
if( FD_ISSET( a, &wr )) filed[b].revents |= POLLOUT;
if( FD_ISSET( a, &ex )) filed[b].revents |= POLLPRI;
#ifdef DEBUG_POLL_AS_SELECT
if ((filed[b].events != 0) || (filed[b].revents != 0)) {
LDAPDebug(LDAP_DEBUG_ANY, " file des=%d, events=0x%x, revents=0x%x\n", filed[b].fd, filed[b].events ,filed[b].revents);
}
#endif /* DEBUG_POLL_AS_SELECT */
}
}
for( a=0, retval=0 ; a<nfds; a++ ){
if( filed[a].revents ) retval++;
}
#ifdef DEBUG_POLL_AS_SELECT
LDAPDebug(LDAP_DEBUG_ANY, "poll returns %d (converted poll)\n",retval,0,0);
#endif /* DEBUG_POLL_AS_SELECT */
return( retval );
}
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