43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* Copyright (C) 1991, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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The GNU C 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the GNU C Library; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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/* Defined in brk.c. */
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extern PTR __curbrk;
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extern int EXFUN(__brk, (PTR addr));
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/* Extend the process's data space by INCREMENT.
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If INCREMENT is negative, shrink data space by - INCREMENT.
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Return start of new space allocated, or -1 for errors. */
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PTR
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DEFUN(__sbrk, (increment), int increment)
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{
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char *oldbrk;
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if (increment == 0)
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return __curbrk;
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oldbrk = __curbrk;
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if (__brk(oldbrk + increment) < 0)
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return (PTR) -1;
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return oldbrk;
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}
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weak_alias (__sbrk, sbrk)
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