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fs/vfs: Add new internal OS interface nx_read(). nx_read() is functionally equivalent to read() except that it does not modify the errno variable and it is not a cancellation point. Changed all references to read() in the OS to nx_read().

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This commit is contained in:
Gregory Nutt
2017-10-11 12:13:41 -06:00
parent 957831d2ba
commit 181875f3ba
18 changed files with 222 additions and 141 deletions
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drivers/mtd/filemtd.c
+6 -6
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@@ -162,8 +162,8 @@ static ssize_t filemtd_write(FAR struct file_dev_s *priv, size_t offset,
/* Read more data from the file */
lseek(priv->fd, seekpos, SEEK_SET);
buflen = read(priv->fd, buf, sizeof(buf));
pout = (FAR uint8_t *) buf;
buflen = nx_read(priv->fd, buf, sizeof(buf));
pout = (FAR uint8_t *) buf;
}
/* Get the source and destination values */
@@ -231,9 +231,9 @@ static ssize_t filemtd_read(FAR struct file_dev_s *priv,
{
/* Set the starting location in the file */
lseek(priv->fd, priv->offset + offsetbytes, SEEK_SET);
(void)lseek(priv->fd, priv->offset + offsetbytes, SEEK_SET);
return read(priv->fd, buffer, nbytes);
return nx_read(priv->fd, buffer, nbytes);
}
/****************************************************************************
@@ -325,7 +325,7 @@ static ssize_t filemtd_bread(FAR struct mtd_dev_s *dev, off_t startblock,
/* Then read the data from the file */
filemtd_read(priv, buf, offset, nbytes);
(void)filemtd_read(priv, buf, offset, nbytes);
return nblocks;
}
@@ -387,7 +387,7 @@ static ssize_t filemtd_byteread(FAR struct mtd_dev_s *dev, off_t offset,
return 0;
}
filemtd_read(priv, buf, offset, nbytes);
(void)filemtd_read(priv, buf, offset, nbytes);
return nbytes;
}