libdill: Structured Concurrency for C

NAME

bsend - sends data to a socket

SYNOPSIS

#include <libdill.h>

int bsend(
    int s,
    const void* buf,
    size_t len,
    int64_t deadline);

DESCRIPTION

This function sends data to a bytestream socket. It is a blocking operation that unblocks only after all the data are sent. There is no such thing as partial send. If a problem, including timeout, occurs while sending the data error is returned to the user and the socket cannot be used for sending from that point on.

s: The socket to send the data to.

buf: Buffer to send.

len: Size of the buffer, in bytes.

deadline: A point in time when the operation should time out, in milliseconds. Use the now function to get your current point in time. 0 means immediate timeout, i.e., perform the operation if possible or return without blocking if not. -1 means no deadline, i.e., the call will block forever if the operation cannot be performed.

RETURN VALUE

In case of success the function returns 0. In case of error it returns -1 and sets errno to one of the values below.

ERRORS

EBADF: Invalid handle.
EBUSY: The handle is currently being used by a different coroutine.
ECANCELED: Current coroutine was canceled.
ECONNRESET: Broken connection.
EINVAL: Invalid argument.
ENOTSUP: The handle does not support this operation.
EPIPE: Closed connection.
ETIMEDOUT: Deadline was reached.

EXAMPLE

int rc = bsend(s, "ABC", 3, -1);