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Editing: thread-shared-types.h
/* Common threading primitives definitions for both POSIX and C11. Copyright (C) 2017-2022 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #ifndef _THREAD_SHARED_TYPES_H #define _THREAD_SHARED_TYPES_H 1 /* Arch-specific definitions. Each architecture must define the following macros to define the expected sizes of pthread data types: __SIZEOF_PTHREAD_ATTR_T - size of pthread_attr_t. __SIZEOF_PTHREAD_MUTEX_T - size of pthread_mutex_t. __SIZEOF_PTHREAD_MUTEXATTR_T - size of pthread_mutexattr_t. __SIZEOF_PTHREAD_COND_T - size of pthread_cond_t. __SIZEOF_PTHREAD_CONDATTR_T - size of pthread_condattr_t. __SIZEOF_PTHREAD_RWLOCK_T - size of pthread_rwlock_t. __SIZEOF_PTHREAD_RWLOCKATTR_T - size of pthread_rwlockattr_t. __SIZEOF_PTHREAD_BARRIER_T - size of pthread_barrier_t. __SIZEOF_PTHREAD_BARRIERATTR_T - size of pthread_barrierattr_t. The additional macro defines any constraint for the lock alignment inside the thread structures: __LOCK_ALIGNMENT - for internal lock/futex usage. Same idea but for the once locking primitive: __ONCE_ALIGNMENT - for pthread_once_t/once_flag definition. */ #include <bits/pthreadtypes-arch.h> #include <bits/atomic_wide_counter.h> /* Common definition of pthread_mutex_t. */ typedef struct __pthread_internal_list { struct __pthread_internal_list *__prev; struct __pthread_internal_list *__next; } __pthread_list_t; typedef struct __pthread_internal_slist { struct __pthread_internal_slist *__next; } __pthread_slist_t; /* Arch-specific mutex definitions. A generic implementation is provided by sysdeps/nptl/bits/struct_mutex.h. If required, an architecture can override it by defining: 1. struct __pthread_mutex_s (used on both pthread_mutex_t and mtx_t definition). It should contains at least the internal members defined in the generic version. 2. __LOCK_ALIGNMENT for any extra attribute for internal lock used with atomic operations. 3. The macro __PTHREAD_MUTEX_INITIALIZER used for static initialization. It should initialize the mutex internal flag. */ #include <bits/struct_mutex.h> /* Arch-sepecific read-write lock definitions. A generic implementation is provided by struct_rwlock.h. If required, an architecture can override it by defining: 1. struct __pthread_rwlock_arch_t (used on pthread_rwlock_t definition). It should contain at least the internal members defined in the generic version. 2. The macro __PTHREAD_RWLOCK_INITIALIZER used for static initialization. It should initialize the rwlock internal type. */ #include <bits/struct_rwlock.h> /* Common definition of pthread_cond_t. */ struct __pthread_cond_s { __atomic_wide_counter __wseq; __atomic_wide_counter __g1_start; unsigned int __g_refs[2] __LOCK_ALIGNMENT; unsigned int __g_size[2]; unsigned int __g1_orig_size; unsigned int __wrefs; unsigned int __g_signals[2]; }; typedef unsigned int __tss_t; typedef unsigned long int __thrd_t; typedef struct { int __data __ONCE_ALIGNMENT; } __once_flag; #define __ONCE_FLAG_INIT { 0 } #endif /* _THREAD_SHARED_TYPES_H */
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