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âī¸ Editing: mutex.h
/* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #ifndef ISC_MUTEX_H #define ISC_MUTEX_H 1 #include <isc/result.h> /* for ISC_R_ codes */ typedef int isc_mutex_t; #define isc_mutex_init(mp) \ (*(mp) = 0, ISC_R_SUCCESS) #define isc_mutex_lock(mp) \ ((*(mp))++ == 0 ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) #define isc_mutex_unlock(mp) \ (--(*(mp)) == 0 ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) #define isc_mutex_trylock(mp) \ (*(mp) == 0 ? ((*(mp))++, ISC_R_SUCCESS) : ISC_R_LOCKBUSY) #define isc_mutex_destroy(mp) \ (*(mp) == 0 ? (*(mp) = -1, ISC_R_SUCCESS) : ISC_R_UNEXPECTED) #define isc_mutex_stats(fp) #endif /* ISC_MUTEX_H */
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