| /* |
| Copyright 2016 Garrett D'Amore <garrett@damore.org> |
| |
| 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 "once.h" |
| #if NN_HAVE_WINDOWS |
| |
| /* This craziness is required because Windows doesn't have the notion of |
| static initializers for CriticalSections. */ |
| |
| BOOL CALLBACK nn_do_once_cb (PINIT_ONCE InitOnce, |
| PVOID Parameter, PVOID *Context) |
| { |
| void (*func)(void) = Parameter; |
| func(); |
| return (TRUE); |
| } |
| |
| void nn_do_once (nn_once_t *once, void (*func)(void)) |
| { |
| (void) InitOnceExecuteOnce(&once->once, nn_do_once_cb, func, NULL); |
| } |
| |
| #else /* !NN_HAVE_WINDOWS */ |
| |
| void nn_do_once (nn_once_t *once, void (*func)(void)) |
| { |
| pthread_once (&once->once, func); |
| } |
| |
| #endif |