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78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
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/*
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include/proto/port_range.h
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This file defines everything needed to manage port ranges
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Copyright (C) 2000-2009 Willy Tarreau - w@1wt.eu
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation, version 2.1
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exclusively.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _PROTO_PORT_RANGE_H
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#define _PROTO_PORT_RANGE_H
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#include <types/port_range.h>
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/* return an available port from range <range>, or zero if none is left */
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static inline int port_range_alloc_port(struct port_range *range)
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{
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int ret;
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if (!range->avail)
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return 0;
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ret = range->ports[range->get];
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range->get++;
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if (range->get >= range->size)
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range->get = 0;
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range->avail--;
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return ret;
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}
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/* release port <port> into port range <range>. Does nothing if <port> is zero
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* nor if <range> is null. The caller is responsible for marking the port
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* unused by either setting the port to zero or the range to NULL.
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*/
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static inline void port_range_release_port(struct port_range *range, int port)
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{
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if (!port || !range)
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return;
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range->ports[range->put] = port;
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range->avail++;
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range->put++;
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if (range->put >= range->size)
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range->put = 0;
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}
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/* return a new initialized port range of N ports. The ports are not
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* filled in, it's up to the caller to do it.
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*/
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static inline struct port_range *port_range_alloc_range(int n)
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{
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struct port_range *ret;
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ret = calloc(1, sizeof(struct port_range) +
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n * sizeof(((struct port_range *)0)->ports[0]));
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ret->size = ret->avail = n;
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return ret;
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}
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#endif /* _PROTO_PORT_RANGE_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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