/* cancel asynchronous read */
uint4 mur_fread_cancel(jnl_ctl_list *jctl)
{
int status, index, save_err;
reg_ctl_list *rctl;
mur_read_desc_t *mur_desc;
mur_buff_desc_t *seq_buff;
rctl = jctl->reg_ctl;
mur_desc = rctl->mur_desc;
/* At most one buffer can have read_in_progress, not both */
assert(!(mur_desc->seq_buff[0].read_in_progress && mur_desc->seq_buff[1].read_in_progress));
for (index = 0, save_err = 0; index < ARRAYSIZE(mur_desc->seq_buff); index++)
{
seq_buff = &mur_desc->seq_buff[index];
if (seq_buff->read_in_progress)
{
AIO_CANCEL(seq_buff->rip_channel, NULL, status);
if (-1 == status)
save_err = errno;
else if (AIO_NOTCANCELED == status) /* the OS cannot cancel the aio once it has actually started */
jctl->status = mur_fread_wait(seq_buff); /* wait for it to finish. */
seq_buff->read_in_progress = FALSE;
}
}
/* Note that although the cancellation errored out for rip_channel, we are storing the status in jctl which need not
* actually be the jctl corresponding to rip_channel
*/
return (jctl->status = ((0 == save_err) ? SS_NORMAL : save_err));
}
/* cancel asynchronous read */
uint4 mur_fread_cancel(void)
{
int status, index, save_err;
/* At most one buffer can have read_in_progress, not both */
assert(!(mur_desc.seq_buff[0].read_in_progress && mur_desc.seq_buff[1].read_in_progress));
for (index = 0, save_err = 0; index < sizeof(mur_desc.seq_buff) / sizeof(mur_desc.seq_buff[0]); index++)
{
if (mur_desc.seq_buff[index].read_in_progress)
{
AIO_CANCEL(mur_desc.seq_buff[index].rip_channel, NULL, status);
if (-1 == status)
save_err = errno;
else if (AIO_NOTCANCELED == status) /* the OS cannot cancel the aio once it has actually started */
mur_jctl->status = mur_fread_wait(&mur_desc.seq_buff[index]); /* wait for it to finish. */
mur_desc.seq_buff[index].read_in_progress = FALSE;
}
}
/* Note that although the cancellation errored out for rip_channel, we are storing the status in mur_jctl which need not
* actually be the jctl corresponding to rip_channel
*/
return (mur_jctl->status = ((0 == save_err) ? SS_NORMAL : save_err));
}
