58 lines
2.3 KiB
C
58 lines
2.3 KiB
C
/*
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* Copyright (c) 2013
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* The President and Fellows of Harvard College.
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* Written by David A. Holland.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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struct poolctl {
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uint32_t *inuse;
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unsigned max;
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const char *itemtype;
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const char *maxname;
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const char *file;
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};
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#define DIVROUNDUP(a, b) (((a) + (b) - 1) / (b))
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#define ROUNDUP(a, b) (DIVROUNDUP(a, b) * (b))
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#define DECLPOOL(T, MAX) \
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static struct T pool_space_##T[ROUNDUP(MAX, 32)]; \
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static uint32_t pool_inuse_##T[DIVROUNDUP(MAX, 32)]; \
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static struct poolctl pool_##T = { \
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.inuse = pool_inuse_##T, \
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.max = ROUNDUP(MAX, 32), \
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.itemtype = "struct " #T, \
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.maxname = #MAX, \
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.file = __FILE__ \
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}
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#define POOLALLOC(T) (&pool_space_##T[poolalloc(&pool_##T)])
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#define POOLFREE(T, x) (poolfree(&pool_##T, (x) - pool_space_##T))
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unsigned poolalloc(struct poolctl *pool);
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void poolfree(struct poolctl *pool, unsigned ix);
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