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sync branch rt-smart. (#6641)

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* Synchronize the code of the rt mart branch to the master branch.
  * TTY device
  * Add lwP code from rt-smart
  * Add vnode in DFS, but DFS will be re-write for rt-smart
  * There are three libcpu for rt-smart:
    * arm/cortex-a, arm/aarch64
    * riscv64

Co-authored-by: Rbb666 <zhangbingru@rt-thread.com>
Co-authored-by: zhkag <zhkag@foxmail.com>
This commit is contained in:
guo
2022-12-03 12:07:44 +08:00
committed by GitHub
parent aaf5462c6d
commit ecf2d82159
1693 changed files with 389530 additions and 9680 deletions
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40
components/lwp/lwp_mm.c Normal file
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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
#include <rthw.h>
#include <rtthread.h>
#include "lwp_mm.h"
static rt_mutex_t mm_lock;
void rt_mm_lock(void)
{
if (rt_thread_self())
{
if (!mm_lock)
{
mm_lock = rt_mutex_create("mm_lock", RT_IPC_FLAG_FIFO);
}
if (mm_lock)
{
rt_mutex_take(mm_lock, RT_WAITING_FOREVER);
}
}
}
void rt_mm_unlock(void)
{
if (rt_thread_self())
{
if (mm_lock)
{
rt_mutex_release(mm_lock);
}
}
}