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own CVS tree will help minimize CVS conflicts. Maybe not. Blame Graff for getting me to trim all trailing whitespace.
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
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* Copyright (C) 1999, 2000 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
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* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
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* INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: random.h,v 1.7 2000/08/01 01:30:37 tale Exp $ */
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#ifndef ISC_RANDOM_H
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#define ISC_RANDOM_H 1
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#include <isc/lang.h>
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#include <isc/types.h>
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/*
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* Implements a random state pool which will let the caller return a
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* series of possibly non-reproducable random values. Note that the
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* strength of these numbers is not all that high, and should not be
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* used in cryptography functions.
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*/
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ISC_LANG_BEGINDECLS
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struct isc_random {
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unsigned int magic;
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#if 0
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isc_mutex_t lock;
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#endif
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};
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#define ISC_RANDOM_MAGIC 0x52416e64 /* RAnd. */
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#define ISC_RANDOM_VALID(x) ((x) != NULL && (x->magic) == ISC_RANDOM_MAGIC)
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isc_result_t
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isc_random_init(isc_random_t *r);
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/*
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* Initialize a random state.
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*
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* This function must be called before using any of the following functions.
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*
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* Requires:
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* r != NULL.
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*/
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isc_result_t
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isc_random_invalidate(isc_random_t *r);
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/*
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* Invalidate a random state. This will wipe any information contained in
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* the state and make it unusable.
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*
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* Requires:
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* r be a valid pool.
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*/
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void
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isc_random_seed(isc_random_t *r, isc_uint32_t seed);
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/*
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* Set the initial seed of the random state. Note that on some systems
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* the private state isn't all that private, and setting the seed may
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* alter numbers returned to other state pools.
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*
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* Requires:
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* r be a valid pool.
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*/
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void
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isc_random_get(isc_random_t *r, isc_uint32_t *val);
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/*
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* Get a random value. Note that on some systems the private state isn't
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* all that private, and getting a value may alter what other state pools
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* would have returned.
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*
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* Requires:
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* r be a valid pool.
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* val != NULL.
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*/
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ISC_LANG_ENDDECLS
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#endif /* ISC_RANDOM_H */
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