mirror of
https://github.com/OpenVPN/openvpn.git
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564a21094e
git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@5599 e7ae566f-a301-0410-adde-c780ea21d3b5
159 lines
3.6 KiB
C
159 lines
3.6 KiB
C
/*
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* OpenVPN -- An application to securely tunnel IP networks
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* over a single TCP/UDP port, with support for SSL/TLS-based
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* session authentication and key exchange,
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* packet encryption, packet authentication, and
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* packet compression.
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*
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* Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING included with this
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* distribution); if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef EVENT_H
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#define EVENT_H
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#include "win32.h"
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#include "sig.h"
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#include "perf.h"
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/*
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* rwflags passed to event_ctl and returned by
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* struct event_set_return.
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*/
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#define EVENT_UNDEF 4
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#define EVENT_READ (1<<0)
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#define EVENT_WRITE (1<<1)
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/*
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* Initialization flags passed to event_set_init
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*/
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#define EVENT_METHOD_US_TIMEOUT (1<<0)
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#define EVENT_METHOD_FAST (1<<1)
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#ifdef WIN32
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typedef const struct rw_handle *event_t;
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#define UNDEFINED_EVENT (NULL)
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#else
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typedef int event_t;
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#define UNDEFINED_EVENT (-1)
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#endif
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struct event_set;
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struct event_set_return;
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struct event_set_functions
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{
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void (*free)(struct event_set *es);
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void (*reset)(struct event_set *es);
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void (*del)(struct event_set *es, event_t event);
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void (*ctl)(struct event_set *es, event_t event, unsigned int rwflags, void *arg);
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/*
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* Return status for wait:
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* -1 on signal or error
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* 0 on timeout
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* length of event_set_return if at least 1 event is returned
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*/
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int (*wait)(struct event_set *es, const struct timeval *tv, struct event_set_return *out, int outlen);
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};
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struct event_set_return
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{
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unsigned int rwflags;
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void *arg;
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};
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struct event_set
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{
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struct event_set_functions func;
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};
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/*
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* maxevents on input: desired max number of event_t descriptors
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* simultaneously set with event_ctl
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* maxevents on output: may be modified down, depending on limitations
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* of underlying API
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* flags: EVENT_METHOD_x flags
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*/
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struct event_set *event_set_init (int *maxevents, unsigned int flags);
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static inline void
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event_free (struct event_set *es)
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{
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if (es)
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(*es->func.free)(es);
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}
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static inline void
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event_reset (struct event_set *es)
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{
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(*es->func.reset)(es);
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}
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static inline void
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event_del (struct event_set *es, event_t event)
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{
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(*es->func.del)(es, event);
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}
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static inline void
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event_ctl (struct event_set *es, event_t event, unsigned int rwflags, void *arg)
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{
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(*es->func.ctl)(es, event, rwflags, arg);
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}
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static inline int
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event_wait (struct event_set *es, const struct timeval *tv, struct event_set_return *out, int outlen)
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{
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int ret;
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perf_push (PERF_IO_WAIT);
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ret = (*es->func.wait)(es, tv, out, outlen);
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perf_pop ();
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return ret;
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}
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static inline void
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event_set_return_init (struct event_set_return *esr)
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{
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esr->rwflags = 0;
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esr->arg = NULL;
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}
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#ifdef WIN32
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static inline void
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wait_signal (struct event_set *es, void *arg)
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{
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if (HANDLE_DEFINED (win32_signal.in.read))
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event_ctl (es, &win32_signal.in, EVENT_READ, arg);
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}
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#else
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static inline void
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wait_signal (struct event_set *es, void *arg)
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{
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}
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#endif
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#endif
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