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      1 /*	$NetBSD: thread.h,v 1.1 2024/02/18 20:57:56 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
      5  *
      6  * SPDX-License-Identifier: MPL-2.0
      7  *
      8  * This Source Code Form is subject to the terms of the Mozilla Public
      9  * License, v. 2.0. If a copy of the MPL was not distributed with this
     10  * file, you can obtain one at https://mozilla.org/MPL/2.0/.
     11  *
     12  * See the COPYRIGHT file distributed with this work for additional
     13  * information regarding copyright ownership.
     14  */
     15 
     16 #ifndef ISC_THREAD_H
     17 #define ISC_THREAD_H 1
     18 
     19 /*! \file */
     20 
     21 #include <pthread.h>
     22 
     23 #if defined(HAVE_PTHREAD_NP_H)
     24 #include <pthread_np.h>
     25 #endif /* if defined(HAVE_PTHREAD_NP_H) */
     26 
     27 #include <isc/lang.h>
     28 #include <isc/result.h>
     29 
     30 #if defined(HAVE_THREAD_LOCAL)
     31 #include <threads.h>
     32 extern thread_local size_t isc_tid_v;
     33 #elif defined(HAVE___THREAD)
     34 extern __thread size_t isc_tid_v;
     35 #endif /* if defined(HAVE_THREAD_LOCAL) */
     36 
     37 ISC_LANG_BEGINDECLS
     38 
     39 typedef pthread_t isc_thread_t;
     40 typedef void	 *isc_threadresult_t;
     41 typedef void	 *isc_threadarg_t;
     42 typedef isc_threadresult_t (*isc_threadfunc_t)(isc_threadarg_t);
     43 
     44 void
     45 isc_thread_create(isc_threadfunc_t, isc_threadarg_t, isc_thread_t *);
     46 
     47 void
     48 isc_thread_join(isc_thread_t thread, isc_threadresult_t *result);
     49 
     50 void
     51 isc_thread_yield(void);
     52 
     53 void
     54 isc_thread_setname(isc_thread_t thread, const char *name);
     55 
     56 #define isc_thread_self (uintptr_t) pthread_self
     57 
     58 /***
     59  *** Thread-Local Storage
     60  ***/
     61 
     62 #if defined(HAVE_TLS)
     63 #if defined(HAVE_THREAD_LOCAL)
     64 #define ISC_THREAD_LOCAL static thread_local
     65 #elif defined(HAVE___THREAD)
     66 #define ISC_THREAD_LOCAL static __thread
     67 #else /* if defined(HAVE_THREAD_LOCAL) */
     68 #error "Unknown method for defining a TLS variable!"
     69 #endif /* if defined(HAVE_THREAD_LOCAL) */
     70 #else  /* if defined(HAVE_TLS) */
     71 #error "Thread-local storage support is required!"
     72 #endif /* if defined(HAVE_TLS) */
     73 
     74 ISC_LANG_ENDDECLS
     75 
     76 #endif /* ISC_THREAD_H */
     77