Return to tal-reent.c CVS log

Up to [local] / OpenXM_contrib / gmp

Annotation of OpenXM_contrib/gmp/tal-reent.c, Revision 1.1

1.1     ! ohara       1: /* TMP_ALLOC routines using malloc in a reentrant fashion.
        !             2:
        !             3: Copyright 2000, 2001 Free Software Foundation, Inc.
        !             4:
        !             5: This file is part of the GNU MP Library.
        !             6:
        !             7: The GNU MP Library is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU Lesser General Public License as published by
        !             9: the Free Software Foundation; either version 2.1 of the License, or (at your
        !            10: option) any later version.
        !            11:
        !            12: The GNU MP Library is distributed in the hope that it will be useful, but
        !            13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            15: License for more details.
        !            16:
        !            17: You should have received a copy of the GNU Lesser General Public License
        !            18: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            20: MA 02111-1307, USA. */
        !            21:
        !            22: #include <stdio.h>
        !            23: #include "gmp.h"
        !            24: #include "gmp-impl.h"
        !            25:
        !            26:
        !            27: /* Each TMP_ALLOC uses __gmp_allocate_func to get a block of memory of the
        !            28:    size requested, plus a header at the start which is used to hold the
        !            29:    blocks on a linked list in the marker variable, ready for TMP_FREE to
        !            30:    release.
        !            31:
        !            32:    Callers should try to do multiple allocs with one call, in the style of
        !            33:    TMP_ALLOC_LIMBS_2 if it's easy to arrange, since that will keep down the
        !            34:    number of separate malloc calls.
        !            35:
        !            36:    Enhancements:
        !            37:
        !            38:    Could inline both TMP_ALLOC and TMP_FREE, though TMP_ALLOC would need the
        !            39:    compiler to have "inline" since it returns a value.  The calls to malloc
        !            40:    will be slow though, so it hardly seems worth worrying about one extra
        !            41:    level of function call.  */
        !            42:
        !            43:
        !            44: #define HSIZ   ROUND_UP_MULTIPLE (sizeof (struct tmp_reentrant_t), __TMP_ALIGN)
        !            45:
        !            46: void *
        !            47: __gmp_tmp_reentrant_alloc (struct tmp_reentrant_t **markp, size_t size)
        !            48: {
        !            49:   char    *p;
        !            50:   size_t  total_size;
        !            51:
        !            52: #define P   ((struct tmp_reentrant_t *) p)
        !            53:
        !            54:   total_size = size + HSIZ;
        !            55:   p = (*__gmp_allocate_func) (total_size);
        !            56:   P->size = total_size;
        !            57:   P->next = *markp;
        !            58:   *markp = P;
        !            59:   return p + HSIZ;
        !            60: }
        !            61:
        !            62: void
        !            63: __gmp_tmp_reentrant_free (struct tmp_reentrant_t *mark)
        !            64: {
        !            65:   struct tmp_reentrant_t  *next;
        !            66:
        !            67:   while (mark != NULL)
        !            68:     {
        !            69:       next = mark->next;
        !            70:       (*__gmp_free_func) ((char *) mark, mark->size);
        !            71:       mark = next;
        !            72:     }
        !            73: }