| /* |
| 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. |
| */ |
| |
| #include "atomic.h" |
| #include "err.h" |
| #include "attr.h" |
| |
| void nn_atomic_init (struct nn_atomic *self, uint32_t n) |
| { |
| self->n = n; |
| #if defined NN_ATOMIC_MUTEX |
| nn_mutex_init (&self->sync); |
| #endif |
| } |
| |
| #if defined NN_ATOMIC_MUTEX |
| void nn_atomic_term (struct nn_atomic *self) |
| { |
| nn_mutex_term (&self->sync); |
| } |
| #else |
| void nn_atomic_term (NN_UNUSED struct nn_atomic *self) |
| { |
| } |
| #endif |
| |
| uint32_t nn_atomic_inc (struct nn_atomic *self, uint32_t n) |
| { |
| #if defined NN_ATOMIC_WINAPI |
| return (uint32_t) InterlockedExchangeAdd ((LONG*) &self->n, n); |
| #elif defined NN_ATOMIC_SOLARIS |
| return atomic_add_32_nv (&self->n, n) - n; |
| #elif defined NN_ATOMIC_GCC_BUILTINS |
| return (uint32_t) __sync_fetch_and_add (&self->n, n); |
| #elif defined NN_ATOMIC_MUTEX |
| uint32_t res; |
| nn_mutex_lock (&self->sync); |
| res = self->n; |
| self->n += n; |
| nn_mutex_unlock (&self->sync); |
| return res; |
| #else |
| #error |
| #endif |
| } |
| |
| uint32_t nn_atomic_dec (struct nn_atomic *self, uint32_t n) |
| { |
| #if defined NN_ATOMIC_WINAPI |
| return (uint32_t) InterlockedExchangeAdd ((LONG*) &self->n, -((LONG) n)); |
| #elif defined NN_ATOMIC_SOLARIS |
| return atomic_add_32_nv (&self->n, -((int32_t) n)) + n; |
| #elif defined NN_ATOMIC_GCC_BUILTINS |
| return (uint32_t) __sync_fetch_and_sub (&self->n, n); |
| #elif defined NN_ATOMIC_MUTEX |
| uint32_t res; |
| nn_mutex_lock (&self->sync); |
| res = self->n; |
| self->n -= n; |
| nn_mutex_unlock (&self->sync); |
| return res; |
| #else |
| #error |
| #endif |
| } |
| |