1 /* Private libc-internal interface for mutex locks. 2 Copyright (C) 2015-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public License as 7 published by the Free Software Foundation; either version 2.1 of the 8 License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; see the file COPYING.LIB. If 17 not, see <https://www.gnu.org/licenses/>. */ 18 19 #ifndef _HTL_LIBC_LOCK_H 20 #define _HTL_LIBC_LOCK_H 1 21 22 #include_next <libc-lock.h> 23 #include <bits/cancelation.h> 24 25 #undef __libc_cleanup_region_start 26 #undef __libc_cleanup_region_end 27 #undef __libc_cleanup_end 28 #undef __libc_cleanup_push 29 #undef __libc_cleanup_pop 30 31 #define __libc_cleanup_region_start(DOIT, FCT, ARG) \ 32 { \ 33 struct __pthread_cancelation_handler **__handlers = NULL; \ 34 struct __pthread_cancelation_handler __handler; \ 35 int __registered = 0; \ 36 if (DOIT) \ 37 { \ 38 __handler.__handler = FCT; \ 39 __handler.__arg = ARG; \ 40 if (__pthread_get_cleanup_stack != NULL) \ 41 { \ 42 __handlers = __pthread_get_cleanup_stack (); \ 43 __handler.__next = *__handlers; \ 44 *__handlers = &__handler; \ 45 __registered = 1; \ 46 } \ 47 } \ 48 49 #define __libc_cleanup_end(DOIT) \ 50 if (__registered) \ 51 *__handlers = __handler.__next; \ 52 if (DOIT) \ 53 __handler.__handler (__handler.__arg); \ 54 55 #define __libc_cleanup_region_end(DOIT) \ 56 __libc_cleanup_end(DOIT) \ 57 } 58 59 #define __libc_cleanup_push(fct, arg) __libc_cleanup_region_start (1, fct, arg) 60 #define __libc_cleanup_pop(execute) __libc_cleanup_region_end (execute) 61 62 #if !IS_IN (libpthread) 63 # ifdef weak_extern 64 weak_extern (__pthread_get_cleanup_stack) 65 # else 66 # pragma weak __pthread_get_cleanup_stack 67 # endif 68 #endif 69 70 #endif 71