/* Common threading primitives definitions for both POSIX and C11.
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Copyright (C) 2017-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _THREAD_SHARED_TYPES_H
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#define _THREAD_SHARED_TYPES_H 1
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/* Arch-specific definitions. Each architecture must define the following
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macros to define the expected sizes of pthread data types:
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__SIZEOF_PTHREAD_ATTR_T - size of pthread_attr_t.
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__SIZEOF_PTHREAD_MUTEX_T - size of pthread_mutex_t.
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__SIZEOF_PTHREAD_MUTEXATTR_T - size of pthread_mutexattr_t.
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__SIZEOF_PTHREAD_COND_T - size of pthread_cond_t.
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__SIZEOF_PTHREAD_CONDATTR_T - size of pthread_condattr_t.
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__SIZEOF_PTHREAD_RWLOCK_T - size of pthread_rwlock_t.
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__SIZEOF_PTHREAD_RWLOCKATTR_T - size of pthread_rwlockattr_t.
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__SIZEOF_PTHREAD_BARRIER_T - size of pthread_barrier_t.
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__SIZEOF_PTHREAD_BARRIERATTR_T - size of pthread_barrierattr_t.
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The additional macro defines any constraint for the lock alignment
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inside the thread structures:
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__LOCK_ALIGNMENT - for internal lock/futex usage.
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Same idea but for the once locking primitive:
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__ONCE_ALIGNMENT - for pthread_once_t/once_flag definition. */
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#include <bits/pthreadtypes-arch.h>
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/* Common definition of pthread_mutex_t. */
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typedef struct __pthread_internal_list
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{
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struct __pthread_internal_list *__prev;
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struct __pthread_internal_list *__next;
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} __pthread_list_t;
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typedef struct __pthread_internal_slist
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{
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struct __pthread_internal_slist *__next;
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} __pthread_slist_t;
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/* Arch-specific mutex definitions. A generic implementation is provided
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by sysdeps/nptl/bits/struct_mutex.h. If required, an architecture
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can override it by defining:
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1. struct __pthread_mutex_s (used on both pthread_mutex_t and mtx_t
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definition). It should contains at least the internal members
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defined in the generic version.
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2. __LOCK_ALIGNMENT for any extra attribute for internal lock used with
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atomic operations.
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3. The macro __PTHREAD_MUTEX_INITIALIZER used for static initialization.
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It should initialize the mutex internal flag. */
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#include <bits/struct_mutex.h>
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/* Arch-sepecific read-write lock definitions. A generic implementation is
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provided by struct_rwlock.h. If required, an architecture can override it
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by defining:
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1. struct __pthread_rwlock_arch_t (used on pthread_rwlock_t definition).
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It should contain at least the internal members defined in the
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generic version.
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2. The macro __PTHREAD_RWLOCK_INITIALIZER used for static initialization.
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It should initialize the rwlock internal type. */
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#include <bits/struct_rwlock.h>
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/* Common definition of pthread_cond_t. */
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struct __pthread_cond_s
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{
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__extension__ union
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{
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__extension__ unsigned long long int __wseq;
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struct
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{
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unsigned int __low;
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unsigned int __high;
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} __wseq32;
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};
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__extension__ union
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{
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__extension__ unsigned long long int __g1_start;
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struct
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{
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unsigned int __low;
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unsigned int __high;
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} __g1_start32;
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};
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unsigned int __g_refs[2] __LOCK_ALIGNMENT;
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unsigned int __g_size[2];
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unsigned int __g1_orig_size;
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unsigned int __wrefs;
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unsigned int __g_signals[2];
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};
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typedef unsigned int __tss_t;
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typedef unsigned long int __thrd_t;
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typedef struct
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{
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int __data __ONCE_ALIGNMENT;
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} __once_flag;
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#define __ONCE_FLAG_INIT { 0 }
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#endif /* _THREAD_SHARED_TYPES_H */
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