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

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guo 2023-05-15 14:58:56 +08:00 committed by GitHub
parent a5211c70b6
commit 8a1260c56a
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1 changed files with 16 additions and 12 deletions
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22
src/device.c
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@ -233,15 +233,19 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)
return -RT_EBUSY;
}
/* call device_open interface */
if (device_open != RT_NULL)
/* 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)))
{
result = device_open(dev, oflag);
}
else
{
/* set open flag */
dev->open_flag = (oflag & RT_DEVICE_OFLAG_MASK);
if (device_open != RT_NULL)
{
result = device_open(dev, oflag);
}
else
{
/* set open flag */
dev->open_flag = (oflag & RT_DEVICE_OFLAG_MASK);
}
}
/* set open flag */
@ -251,7 +255,7 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)
dev->ref_count++;
/* don't let bad things happen silently. If you are bitten by this assert,
* please set the ref_count to a bigger type. */
* please set the ref_count to a bigger type. */
RT_ASSERT(dev->ref_count != 0);
}