mirror of https://github.com/apache/cloudstack.git
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*
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* Copyright (C) 2003 - 2004 Mike Wray <mike.wray@hp.com>.
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version. This library is
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* distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _VFC_SELECT_H_
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#define _VFC_SELECT_H_
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/** Set of file descriptors for select.
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*/
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typedef struct SelectSet {
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int n;
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fd_set rd, wr, er;
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} SelectSet;
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enum {
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SELECT_READ = 1,
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SELECT_WRITE = 2,
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SELECT_ERROR = 4,
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};
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extern void SelectSet_zero(SelectSet *set);
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extern void SelectSet_add(SelectSet *set, int fd, int mode);
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extern void SelectSet_add_read(SelectSet *set, int fd);
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extern void SelectSet_add_write(SelectSet *set, int fd);
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extern void SelectSet_add_error(SelectSet *set, int fd);
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extern int SelectSet_select(SelectSet *set, struct timeval *timeout);
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static inline int SelectSet_in(SelectSet *set, int fd){
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return ((fd >= 0)
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? ((FD_ISSET(fd, &set->rd) ? SELECT_READ : 0) |
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(FD_ISSET(fd, &set->wr) ? SELECT_WRITE : 0) |
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(FD_ISSET(fd, &set->er) ? SELECT_ERROR : 0))
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: 0);
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}
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static inline int SelectSet_in_read(SelectSet *set, int fd){
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return (fd >= 0) && FD_ISSET(fd, &set->rd);
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}
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static inline int SelectSet_in_write(SelectSet *set, int fd){
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return (fd >= 0) && FD_ISSET(fd, &set->wr);
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}
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static inline int SelectSet_in_err(SelectSet *set, int fd){
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return (fd >= 0) && FD_ISSET(fd, &set->er);
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}
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#endif /* ! _VFC_SELECT_H_ */
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