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+/* Common threading primitives definitions for both POSIX and C11.
+   Copyright (C) 2017-2024 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  */