IOResult os_sendv_nonb(struct Client *acptr, struct MsgQ* buf, unsigned int* count_in,
unsigned int* count_out)
{
int res;
int count;
struct iovec iov[IOV_MAX];
assert(0 != buf);
assert(0 != count_in);
assert(0 != count_out);
assert(0 != acptr);
*count_in = 0;
*count_out = 0;
errno = 0;
count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
msgq_process(acptr, iov, count);
if (-1 < (res = writev(cli_fd(acptr), iov, count))) {
*count_out = (unsigned) res;
return IO_SUCCESS;
}
else if (EWOULDBLOCK == errno || EAGAIN == errno ||
ENOMEM == errno || ENOBUFS == errno)
return IO_BLOCKED;
return IO_FAILURE;
}
/** Attempt a vectored write on a connected socket.
* @param[in] fd File descriptor to write to.
* @param[in] buf Message queue to send from.
* @param[out] count_in Number of bytes mapped from \a buf.
* @param[out] count_out Receives number of bytes actually written.
* @return An IOResult value indicating status.
*/
IOResult os_sendv_nonb(int fd, struct MsgQ* buf, unsigned int* count_in,
unsigned int* count_out)
{
int res;
int count;
struct iovec iov[IOV_MAX];
assert(0 != buf);
assert(0 != count_in);
assert(0 != count_out);
*count_in = 0;
count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
if (-1 < (res = writev(fd, iov, count))) {
*count_out = (unsigned) res;
return IO_SUCCESS;
} else {
*count_out = 0;
return is_blocked(errno) ? IO_BLOCKED : IO_FAILURE;
}
}
