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lib.c revision 1.10 
      1 /*	$NetBSD: lib.c,v 1.10 2023/06/26 22:03:01 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 /*! \file */
     17 
     18 #include <isc/bind9.h>
     19 #include <isc/iterated_hash.h>
     20 #include <isc/lib.h>
     21 #include <isc/mem.h>
     22 #include <isc/util.h>
     23 
     24 #include "config.h"
     25 #include "mem_p.h"
     26 #include "tls_p.h"
     27 #include "trampoline_p.h"
     28 
     29 #ifndef ISC_CONSTRUCTOR
     30 #error Either __attribute__((constructor|destructor))__ or DllMain support needed to compile BIND 9.
     31 #endif
     32 
     33 /***
     34  *** Functions
     35  ***/
     36 
     37 void
     38 isc_lib_register(void) {
     39 	isc_bind9 = false;
     40 }
     41 
     42 #ifdef WIN32
     43 int
     44 isc_lib_ntservice(int(WINAPI *mainfunc)(int argc, char *argv[]), int argc,
     45 		  char *argv[]) {
     46 	isc__trampoline_t *trampoline = isc__trampoline_get(NULL, NULL);
     47 	int r;
     48 
     49 	isc__trampoline_attach(trampoline);
     50 
     51 	r = mainfunc(argc, argv);
     52 
     53 	isc__trampoline_detach(trampoline);
     54 
     55 	return (r);
     56 }
     57 #endif /* ifdef WIN32 */
     58 
     59 void
     60 isc__initialize(void) ISC_CONSTRUCTOR;
     61 void
     62 isc__shutdown(void) ISC_DESTRUCTOR;
     63 
     64 void
     65 isc__initialize(void) {
     66 	isc__mem_initialize();
     67 	isc__tls_initialize();
     68 	isc__trampoline_initialize();
     69 }
     70 
     71 void
     72 isc__shutdown(void) {
     73 	isc__trampoline_shutdown();
     74 	isc__tls_shutdown();
     75 	isc__mem_shutdown();
     76 }
     77 
     78 /*
     79  * This is a workaround for situation when libisc is statically linked.  Under
     80  * normal situation, the linker throws out all symbols from compilation unit
     81  * when no symbols are used in the final binary.  This empty function must be
     82  * called at least once from different compilation unit (mem.c in this case).
     83  */
     84 void
     85 isc_enable_constructors() {
     86 	/* do nothing */
     87 }
     88