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demi_close()

Name

demi_connect - Closes an I/O queue descriptor.

Synopsis

#include <demi/libos.h>

int demi_close(int qd);

Description

demi_close() closes an I/O queue descriptor, so that it no longers refers to an I/O queue.

The qd parameter is the I/O queue descriptor that is associated with the target I/O queue.

Any operations on a closed I/O queue descriptor will fail. If qd is the last I/O queue descriptor referring to the underlying I/O queue, the resources associated with the open I/O queue descriptor are released.

Return Value

On success, zero is returned. On error, a positive error code is returned.

Errors

On error, one of the following positive error codes is returned:

  • EINVAL - The I/O queue descriptor qd does not refer to a valid I/O queue.
  • EBADF - The I/O queue descriptor qd does not refer to a valid I/O queue descriptor.

Conforming To

Error codes are conformant to POSIX.1-2017.

Bugs

Demikernel may fail with error codes that are not listed in this manual page.

Disclaimer

Any behavior that is not documented in this manual page is unintentional and should be reported.

See Also

demi_socket().