forked from Imagelibrary/rtems
e49bb54227
* libcsupport/Makefile.am, libcsupport/src/newlibc.c: Split libc_init() into a separate file to avoid linkage dependencies on newlibc.c which in turn pulls in fclose() and other C library methods. * libcsupport/src/newlibc_init.c: New file.
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
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* Implementation of hooks for the CYGNUS newlib libc
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* These hooks set things up so that:
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* + '_REENT' is switched at task switch time.
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*
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* COPYRIGHT (c) 1994 by Division Incorporated
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#define __RTEMS_VIOLATE_KERNEL_VISIBILITY__
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#include <rtems.h>
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#if defined(RTEMS_NEWLIB)
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#include <rtems/libcsupport.h>
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/* Since we compile with strict ANSI we need to undef it to get
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* prototypes for extensions
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*/
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#undef __STRICT_ANSI__
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#include <stdlib.h> /* for free() */
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#include <string.h> /* for memset() */
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#include <sys/reent.h> /* for extern of _REENT (aka _impure_ptr) */
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#include <errno.h>
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/*
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* Init libc for CYGNUS newlib
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*
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* Set up _REENT to use our global libc_global_reent.
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* (newlib provides a global of its own, but we prefer our own name for it)
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*
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* If reentrancy is desired (which it should be), then
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* we install the task extension hooks to maintain the
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* newlib reentrancy global variable _REENT on task
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* create, delete, switch, exit, etc.
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*
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*/
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struct _reent libc_global_reent
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__ATTRIBUTE_IMPURE_PTR__ = _REENT_INIT(libc_global_reent);
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void
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libc_init(void)
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{
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_REENT = &libc_global_reent;
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_Thread_Set_libc_reent (&_REENT);
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}
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#endif
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