/* * Copyright ( C ) 2025 The Android Open Source Project * All rights reserved . * * Redistribution and use in source and binary forms , with or without * modification , are permitted provided that the following conditions * are met : * * Redistributions of source code must retain the above copyright * notice , this list of conditions and the following disclaimer . * * Redistributions in binary form must reproduce the above copyright * notice , this list of conditions and the following disclaimer in * the documentation and / or other materials provided with the * distribution . * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * " AS IS " AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT * LIMITED TO , THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED . IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT , INDIRECT , * INCIDENTAL , SPECIAL , EXEMPLARY , OR CONSEQUENTIAL DAMAGES ( INCLUDING , * BUT NOT LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES ; LOSS * OF USE , DATA , OR PROFITS ; OR BUSINESS INTERRUPTION ) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT LIABILITY , * OR TORT ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE . #pragma once/** * @ file bits / call_once . h * @ brief ISO C pthread_once ( ) equivalent . #include <sys/cdefs.h>#include <bits/pthread_types.h>/** Default value for type once_flag. */ #define ONCE_FLAG_INIT PTHREAD_ONCE_INIT/** The type used by call_once(). */ typedef pthread_once_t once_flag;/** * Uses ` _ _ flag ` to ensure that ` _ _ function ` is called exactly once , * even in multi - threaded contexts . void call_once(once_flag* _Nonnull __flag, void (* _Nonnull __function)(void )) __RENAME(pthread_once);
Messung V0.5 in Prozent C=93 H=86 G=89
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