/*
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* Copyright (c) 2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include "retval.h"
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static kernel_long_t *retval_vec;
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static size_t retval_vec_capacity; /* size of the arena */
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static size_t retval_vec_size; /* size of the used arena */
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static void
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expand_retval_vec(void)
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{
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const size_t old_capacity = retval_vec_capacity;
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retval_vec = xgrowarray(retval_vec, &retval_vec_capacity,
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sizeof(*retval_vec));
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memset(retval_vec + old_capacity, 0,
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(retval_vec_capacity - old_capacity)
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* sizeof(*retval_vec));
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}
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uint16_t
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retval_new(const kernel_long_t rval)
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{
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const uint16_t idx = retval_vec_size;
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if (idx < retval_vec_size)
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error_func_msg_and_die("retval index overflow");
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if (retval_vec_size == retval_vec_capacity)
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expand_retval_vec();
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retval_vec[idx] = rval;
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++retval_vec_size;
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return idx;
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}
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kernel_long_t
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retval_get(const uint16_t rval_idx)
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{
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if (rval_idx >= retval_vec_size)
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error_func_msg_and_die("rval_idx >= retval_vec_size");
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return retval_vec[rval_idx];
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}
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