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bind/lib/isc/mutex.c

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ISC_MUTEX_PROFILE can be set to enable basic mutex profiling. Running named with -s prints the results.
2000-12-29 01:29:56 +00:00
/*
update copyright notice
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
ISC_MUTEX_PROFILE can be set to enable basic mutex profiling. Running named with -s prints the results.
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*
* SPDX-License-Identifier: MPL-2.0
Update the copyright information in all files in the repository This commit converts the license handling to adhere to the REUSE specification. It specifically: 1. Adds used licnses to LICENSES/ directory 2. Add "isc" template for adding the copyright boilerplate 3. Changes all source files to include copyright and SPDX license header, this includes all the C sources, documentation, zone files, configuration files. There are notes in the doc/dev/copyrights file on how to add correct headers to the new files. 4. Handle the rest that can't be modified via .reuse/dep5 file. The binary (or otherwise unmodifiable) files could have license places next to them in <foo>.license file, but this would lead to cluttered repository and most of the files handled in the .reuse/dep5 file are system test files.
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*
ISC_MUTEX_PROFILE can be set to enable basic mutex profiling. Running named with -s prints the results.
2000-12-29 01:29:56 +00:00
* 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/.
Update license headers to not include years in copyright in all applicable files
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*
ISC_MUTEX_PROFILE can be set to enable basic mutex profiling. Running named with -s prints the results.
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* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
1851. [doc] Doxygen comment markup. [RT #11398]
2005-04-27 04:57:32 +00:00
/*! \file */
ISC_MUTEX_PROFILE can be set to enable basic mutex profiling. Running named with -s prints the results.
2000-12-29 01:29:56 +00:00
1900. [port] freebsd: pthread_mutex_init can fail if it runs out of memory. [RT #14995]
2005-07-12 01:00:20 +00:00
#include <errno.h>
Replace custom isc_boolean_t with C standard bool type
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#include <stdbool.h>
ISC_MUTEX_PROFILE can be set to enable basic mutex profiling. Running named with -s prints the results.
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#include <stdio.h>
Use the new sorting rules to regroup #include headers
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#include <sys/time.h>
ISC_MUTEX_PROFILE can be set to enable basic mutex profiling. Running named with -s prints the results.
2000-12-29 01:29:56 +00:00
#include <time.h>
#include <isc/mutex.h>
#include <isc/once.h>
Ensure that POSIX strerror_r variant is use even when _GNU_SOURCE is enabled by default
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#include <isc/strerr.h>
#include <isc/string.h>
Initialize pthread_mutexattrs just once (#38547)
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#include <isc/util.h>
Use clang-format to reformat the source files
2020-02-12 13:59:18 +01:00
Use library constructor to create default mutex attr once Instead of using isc_once_do() on every isc_mutex_init() call, use the global library constructor to initialize the default mutex attr object (optionally with PTHREAD_MUTEX_ADAPTIVE_NP if supported) just once when the library is loaded.
2022-07-13 13:19:32 +02:00
#include "mutex_p.h"
pthread_mutexattr_t isc__mutex_init_attr;
Initialize pthread_mutexattrs just once (#38547)
2015-02-26 14:43:45 +05:30
Move the library init and shutdown to executables Instead of relying on unreliable order of execution of the library constructors and destructors, move them to individual binaries. The advantage is that the execution time and order will remain constant and will not depend on the dynamic load dependency solver. This requires more work, but that was mitigated by a simple requirement, any executable using libisc and libdns, must include <isc/lib.h> and <dns/lib.h> respectively (in this particular order). In turn, these two headers must not be included from within any library as they contain inlined functions marked with constructor/destructor attributes.
2025-02-04 13:17:31 +01:00
void
isc__mutex_initialize(void) {
Use library constructor to create default mutex attr once Instead of using isc_once_do() on every isc_mutex_init() call, use the global library constructor to initialize the default mutex attr object (optionally with PTHREAD_MUTEX_ADAPTIVE_NP if supported) just once when the library is loaded.
2022-07-13 13:19:32 +02:00
RUNTIME_CHECK(pthread_mutexattr_init(&isc__mutex_init_attr) == 0);
Fix PTHREAD_MUTEX_ADAPTIVE_NP and PTHREAD_MUTEX_ERRORCHECK_NP usage The PTHREAD_MUTEX_ADAPTIVE_NP and PTHREAD_MUTEX_ERRORCHECK_NP are usually not defines, but enum values, so simple preprocessor check doesn't work. Check for PTHREAD_MUTEX_ADAPTIVE_NP from the autoconf AS_COMPILE_IFELSE block and define HAVE_PTHREAD_MUTEX_ADAPTIVE_NP. This should enable adaptive mutex on Linux and FreeBSD. As PTHREAD_MUTEX_ERRORCHECK actually comes from POSIX and Linux glibc does define it when compatibility macros are being set, we can just use PTHREAD_MUTEX_ERRORCHECK instead of PTHREAD_MUTEX_ERRORCHECK_NP.
2024-06-18 15:21:52 +02:00
#if ISC_MUTEX_ERROR_CHECK
Use error checking mutex in developer mode on Linux When developer mode is enabled, use error checking mutex type, so we can discover wrong use of mutexes faster.
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RUNTIME_CHECK(pthread_mutexattr_settype(&isc__mutex_init_attr,
Fix PTHREAD_MUTEX_ADAPTIVE_NP and PTHREAD_MUTEX_ERRORCHECK_NP usage The PTHREAD_MUTEX_ADAPTIVE_NP and PTHREAD_MUTEX_ERRORCHECK_NP are usually not defines, but enum values, so simple preprocessor check doesn't work. Check for PTHREAD_MUTEX_ADAPTIVE_NP from the autoconf AS_COMPILE_IFELSE block and define HAVE_PTHREAD_MUTEX_ADAPTIVE_NP. This should enable adaptive mutex on Linux and FreeBSD. As PTHREAD_MUTEX_ERRORCHECK actually comes from POSIX and Linux glibc does define it when compatibility macros are being set, we can just use PTHREAD_MUTEX_ERRORCHECK instead of PTHREAD_MUTEX_ERRORCHECK_NP.
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PTHREAD_MUTEX_ERRORCHECK) == 0);
#elif HAVE_PTHREAD_MUTEX_ADAPTIVE_NP
Use library constructor to create default mutex attr once Instead of using isc_once_do() on every isc_mutex_init() call, use the global library constructor to initialize the default mutex attr object (optionally with PTHREAD_MUTEX_ADAPTIVE_NP if supported) just once when the library is loaded.
2022-07-13 13:19:32 +02:00
RUNTIME_CHECK(pthread_mutexattr_settype(&isc__mutex_init_attr,
PTHREAD_MUTEX_ADAPTIVE_NP) ==
0);
Fix PTHREAD_MUTEX_ADAPTIVE_NP and PTHREAD_MUTEX_ERRORCHECK_NP usage The PTHREAD_MUTEX_ADAPTIVE_NP and PTHREAD_MUTEX_ERRORCHECK_NP are usually not defines, but enum values, so simple preprocessor check doesn't work. Check for PTHREAD_MUTEX_ADAPTIVE_NP from the autoconf AS_COMPILE_IFELSE block and define HAVE_PTHREAD_MUTEX_ADAPTIVE_NP. This should enable adaptive mutex on Linux and FreeBSD. As PTHREAD_MUTEX_ERRORCHECK actually comes from POSIX and Linux glibc does define it when compatibility macros are being set, we can just use PTHREAD_MUTEX_ERRORCHECK instead of PTHREAD_MUTEX_ERRORCHECK_NP.
2024-06-18 15:21:52 +02:00
#endif
Use library constructor to create default mutex attr once Instead of using isc_once_do() on every isc_mutex_init() call, use the global library constructor to initialize the default mutex attr object (optionally with PTHREAD_MUTEX_ADAPTIVE_NP if supported) just once when the library is loaded.
2022-07-13 13:19:32 +02:00
}
void
isc__mutex_shutdown(void) {
/* noop */;
}
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