| /* |
| Copyright (c) 2012-2013 250bpm s.r.o. All rights reserved. |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy |
| of this software and associated documentation files (the "Software"), |
| to deal in the Software without restriction, including without limitation |
| the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| and/or sell copies of the Software, and to permit persons to whom |
| the Software is furnished to do so, subject to the following conditions: |
| |
| The above copyright notice and this permission notice shall be included |
| in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| IN THE SOFTWARE. |
| */ |
| |
| #include "timerset.h" |
| |
| #include "../utils/fast.h" |
| #include "../utils/cont.h" |
| #include "../utils/err.h" |
| |
| void nn_timerset_init (struct nn_timerset *self) |
| { |
| nn_clock_init (&self->clock); |
| nn_list_init (&self->timeouts); |
| } |
| |
| void nn_timerset_term (struct nn_timerset *self) |
| { |
| nn_list_term (&self->timeouts); |
| nn_clock_term (&self->clock); |
| } |
| |
| int nn_timerset_add (struct nn_timerset *self, int timeout, |
| struct nn_timerset_hndl *hndl) |
| { |
| struct nn_list_item *it; |
| struct nn_timerset_hndl *ith; |
| int first; |
| |
| /* Compute the instant when the timeout will be due. */ |
| hndl->timeout = nn_clock_now (&self->clock) + timeout; |
| |
| /* Insert it into the ordered list of timeouts. */ |
| for (it = nn_list_begin (&self->timeouts); |
| it != nn_list_end (&self->timeouts); |
| it = nn_list_next (&self->timeouts, it)) { |
| ith = nn_cont (it, struct nn_timerset_hndl, list); |
| if (hndl->timeout < ith->timeout) |
| break; |
| } |
| |
| /* If the new timeout happens to be the first one to expire, let the user |
| know that the current waiting interval has to be changed. */ |
| first = nn_list_begin (&self->timeouts) == it ? 1 : 0; |
| nn_list_insert (&self->timeouts, &hndl->list, it); |
| return first; |
| } |
| |
| int nn_timerset_rm (struct nn_timerset *self, struct nn_timerset_hndl *hndl) |
| { |
| int first; |
| |
| /* Ignore if handle is not in the timeouts list. */ |
| if (!nn_list_item_isinlist (&hndl->list)) |
| return 0; |
| |
| /* If it was the first timeout that was removed, the actual waiting time |
| may have changed. We'll thus return 1 to let the user know. */ |
| first = nn_list_begin (&self->timeouts) == &hndl->list ? 1 : 0; |
| nn_list_erase (&self->timeouts, &hndl->list); |
| return first; |
| } |
| |
| int nn_timerset_timeout (struct nn_timerset *self) |
| { |
| int timeout; |
| |
| if (nn_fast (nn_list_empty (&self->timeouts))) |
| return -1; |
| |
| timeout = (int) (nn_cont (nn_list_begin (&self->timeouts), |
| struct nn_timerset_hndl, list)->timeout - nn_clock_now (&self->clock)); |
| return timeout < 0 ? 0 : timeout; |
| } |
| |
| int nn_timerset_event (struct nn_timerset *self, struct nn_timerset_hndl **hndl) |
| { |
| struct nn_timerset_hndl *first; |
| |
| /* If there's no timeout, there's no event to report. */ |
| if (nn_fast (nn_list_empty (&self->timeouts))) |
| return -EAGAIN; |
| |
| /* If no timeout have expired yet, there's no event to return. */ |
| first = nn_cont (nn_list_begin (&self->timeouts), |
| struct nn_timerset_hndl, list); |
| if (first->timeout > nn_clock_now (&self->clock)) |
| return -EAGAIN; |
| |
| /* Return the first timeout and remove it from the list of active |
| timeouts. */ |
| nn_list_erase (&self->timeouts, &first->list); |
| *hndl = first; |
| return 0; |
| } |
| |
| void nn_timerset_hndl_init (struct nn_timerset_hndl *self) |
| { |
| nn_list_item_init (&self->list); |
| } |
| |
| void nn_timerset_hndl_term (struct nn_timerset_hndl *self) |
| { |
| nn_list_item_term (&self->list); |
| } |
| |
| int nn_timerset_hndl_isactive (struct nn_timerset_hndl *self) |
| { |
| return nn_list_item_isinlist (&self->list); |
| } |
| |