mongoc_gridfs_file_readv − mongoc_gridfs_file_readv()
ssize_t mongoc_gridfs_file_readv (mongoc_gridfs_file_t *file, mongoc_iovec_t *iov, size_t iovcnt, size_t min_bytes, uint32_t timeout_msec);
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file: A mongoc_gridfs_file_t. | ||
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iov: An array of mongoc_iovec_t. | ||
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iovcnt: The number of elements in iov. | ||
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min_bytes: The minimum number of bytes that must be read or an error will be synthesized. | ||
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timeout_msec: Unused. |
This function performs a scattered read from file, potentially blocking to read from the MongoDB server.
The timeout_msec parameter is unused.
Returns the number of bytes read, or −1 on failure. Use mongoc_gridfs_file_error() to retrieve error details.
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