| /* |
| Copyright (c) 2013 Martin Sustrik 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. |
| */ |
| |
| #ifndef NN_SEM_INCLUDED |
| #define NN_SEM_INCLUDED |
| |
| /* Simple semaphore. It can have only two values (0/1 i.e. locked/unlocked). */ |
| |
| struct nn_sem; |
| |
| /* Initialise the sem object. It is created in locked state. */ |
| void nn_sem_init (struct nn_sem *self); |
| |
| /* Uninitialise the sem object. */ |
| void nn_sem_term (struct nn_sem *self); |
| |
| /* Unlock the semaphore. */ |
| void nn_sem_post (struct nn_sem *self); |
| |
| /* Waits till sem object becomes unlocked and locks it. */ |
| int nn_sem_wait (struct nn_sem *self); |
| |
| #if defined NN_HAVE_OSX |
| |
| #include <pthread.h> |
| |
| struct nn_sem { |
| pthread_mutex_t mutex; |
| pthread_cond_t cond; |
| int signaled; |
| }; |
| |
| #elif defined NN_HAVE_WINDOWS |
| |
| #include "win.h" |
| |
| struct nn_sem { |
| HANDLE h; |
| }; |
| |
| #elif defined NN_HAVE_SEMAPHORE |
| |
| #include <semaphore.h> |
| |
| struct nn_sem { |
| sem_t sem; |
| }; |
| |
| #endif |
| |
| #endif |
| |