2.5-18.1

malloc/morecore.c

@@ -0,0 +1,54 @@
+/* Copyright (C) 1991,92,93,94,95,97,2002,2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef	_MALLOC_INTERNAL
+#define	_MALLOC_INTERNAL
+#include <malloc.h>
+#endif
+
+#ifndef	__GNU_LIBRARY__
+#define	__sbrk	sbrk
+#endif
+
+#ifdef __GNU_LIBRARY__
+/* It is best not to declare this and cast its result on foreign operating
+   systems with potentially hostile include files.  */
+
+#include <stddef.h>
+#include <stdlib.h>
+extern __malloc_ptr_t __sbrk (ptrdiff_t increment) __THROW;
+libc_hidden_proto (__sbrk)
+#endif
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+/* Allocate INCREMENT more bytes of data space,
+   and return the start of data space, or NULL on errors.
+   If INCREMENT is negative, shrink data space.  */
+__malloc_ptr_t
+__default_morecore (increment)
+     __malloc_ptrdiff_t increment;
+{
+  __malloc_ptr_t result = (__malloc_ptr_t) __sbrk (increment);
+  if (result == (__malloc_ptr_t) -1)
+    return NULL;
+  return result;
+}
+libc_hidden_def (__default_morecore)