libs/rt-thread
libs
/
rt-thread
4
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[device] Avoid repeated calls device_open interface. (#7476)

This commit is contained in:
guo 2023-05-15 14:58:56 +08:00 committed by GitHub
parent a5211c70b6
commit 8a1260c56a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/device.c
View File

@ -233,7 +233,10 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)
return -RT_EBUSY; return -RT_EBUSY;
} }
/* call device_open interface */ /* device is not opened or opened by other oflag, call device_open interface */
if (!(dev->open_flag & RT_DEVICE_OFLAG_OPEN) ||
((dev->open_flag & RT_DEVICE_OFLAG_MASK) | (oflag & RT_DEVICE_OFLAG_MASK)))
{
if (device_open != RT_NULL) if (device_open != RT_NULL)
{ {
result = device_open(dev, oflag); result = device_open(dev, oflag);
@ -243,6 +246,7 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)
/* set open flag */ /* set open flag */
dev->open_flag = (oflag & RT_DEVICE_OFLAG_MASK); dev->open_flag = (oflag & RT_DEVICE_OFLAG_MASK);
} }
}
/* set open flag */ /* set open flag */
if (result == RT_EOK || result == -RT_ENOSYS) if (result == RT_EOK || result == -RT_ENOSYS)