| /* |
| * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> |
| * |
| * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| */ |
| |
| #include <unistd.h> |
| #include <errno.h> |
| |
| |
| /* Defined in brk.c. */ |
| extern void *__curbrk attribute_hidden; |
| |
| /* Extend the process's data space by INCREMENT. |
| If INCREMENT is negative, shrink data space by - INCREMENT. |
| Return start of new space allocated, or -1 for errors. */ |
| void * sbrk (intptr_t increment) |
| { |
| void *oldbrk; |
| |
| if (__curbrk == NULL) |
| if (brk (NULL) < 0) /* Initialize the break. */ |
| return (void *) -1; |
| |
| if (increment == 0) |
| return __curbrk; |
| |
| oldbrk = __curbrk; |
| if (brk (oldbrk + increment) < 0) |
| return (void *) -1; |
| |
| return oldbrk; |
| } |
| libc_hidden_def(sbrk) |