1 | /* Copyright 2016 Google Inc. |
2 | |
3 | Licensed under the Apache License, Version 2.0 (the "License"); |
4 | you may not use this file except in compliance with the License. |
5 | You may obtain a copy of the License at |
6 | |
7 | http://www.apache.org/licenses/LICENSE-2.0 |
8 | |
9 | Unless required by applicable law or agreed to in writing, software |
10 | distributed under the License is distributed on an "AS IS" BASIS, |
11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | See the License for the specific language governing permissions and |
13 | limitations under the License. */ |
14 | |
15 | #ifndef NSYNC_INTERNAL_WAIT_INTERNAL_H_ |
16 | #define NSYNC_INTERNAL_WAIT_INTERNAL_H_ |
17 | |
18 | NSYNC_CPP_START_ |
19 | |
20 | /* Implementations of "struct nsync_waitable_s" must provide functions in struct |
21 | nsync_waitable_funcs_s (see public/nsync_wait.h). When nsync_wait_n() waits |
22 | on a client's object, those functions are called with v pointing to the |
23 | client's object and nw pointing to a struct nsync_waiter_s. */ |
24 | struct nsync_waiter_s { |
25 | uint32_t tag; /* used for debugging */ |
26 | nsync_dll_element_ q; /* used to link children of parent */ |
27 | nsync_atomic_uint32_ waiting; /* non-zero <=> the waiter is waiting */ |
28 | struct nsync_semaphore_s_ *sem; /* *sem will be Ved when waiter is woken */ |
29 | uint32_t flags; /* see below */ |
30 | }; |
31 | |
32 | #define NSYNC_WAITER_FLAG_MUCV 0x1 /* set if waiter is embedded in Mu/CV's internal structures */ |
33 | |
34 | NSYNC_CPP_END_ |
35 | |
36 | #endif /*NSYNC_INTERNAL_WAIT_INTERNAL_H_*/ |
37 | |