[libc] Fix system issue when use msh and make code cleanup.
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@ -1,7 +1,16 @@
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/*
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* File: mem_std.c
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* Brief: Replace memory management functions of arm standard c library
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* File : mem_std.c
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* Brief : implement standard memory routins.
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*
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* This file is part of Device File System in RT-Thread RTOS
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* COPYRIGHT (C) 2014, RT-Thread Development Team
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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.rt-thread.org/license/LICENSE.
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*
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* Change Logs:
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* 2014-08-03 bernard Add file header.
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*/
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#include "rtthread.h"
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@ -9,16 +18,21 @@
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/* avoid the heap and heap-using library functions supplied by arm */
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#pragma import(__use_no_heap)
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void * malloc(int n)
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void *malloc(int n)
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{
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return rt_malloc(n);
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}
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void * realloc(void *rmem, rt_size_t newsize)
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void *realloc(void *rmem, rt_size_t newsize)
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{
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return rt_realloc(rmem, newsize);
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}
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void *calloc(rt_size_t nelem, rt_size_t elsize)
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{
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return rt_calloc(nelem, elsize);
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}
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void free(void *rmem)
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{
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rt_free(rmem);
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@ -13,6 +13,8 @@
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* Date Author Notes
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* 2012-11-23 Yihui The first version
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* 2013-11-24 aozima fixed _sys_read()/_sys_write() issues.
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* 2014-08-03 bernard If using msh, use system() implementation
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* in msh.
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*/
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#include <string.h>
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@ -194,9 +196,13 @@ char *_sys_command_string(char *cmd, int len)
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return cmd;
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}
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/* This function writes a character to the console. */
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void _ttywrch(int ch)
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{
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/* TODO */
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char c;
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c = (char)ch;
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rt_kprintf(&c);
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}
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void _sys_exit(int return_code)
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@ -231,18 +237,12 @@ int remove(const char *filename)
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#endif
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}
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/* rename() is defined in dfs_posix.c instead */
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#if 0
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int rename(const char *old, const char *new)
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{
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return -1;
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}
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#endif
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#if defined(RT_USING_FINSH) && defined(FINSH_USING_MSH) && defined(RT_USING_MODULE) && defined(RT_USING_DFS)
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/* use system implementation in the msh */
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#else
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int system(const char *string)
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{
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RT_ASSERT(0);
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for(;;);
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}
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#endif
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