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jeremybenn |
/* Linuxthreads - a simple clone()-based implementation of Posix */
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/* threads for Linux. */
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/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
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/* */
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/* This program is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU Library General Public License */
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/* as published by the Free Software Foundation; either version 2 */
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/* of the License, or (at your option) any later version. */
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/* */
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/* This program 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 */
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/* GNU Library General Public License for more details. */
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#if !defined _BITS_TYPES_H && !defined _PTHREAD_H
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# error "Never include <bits/pthreadtypes.h> directly; use <sys/types.h> instead."
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#endif
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#ifndef _BITS_PTHREADTYPES_H
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#define _BITS_PTHREADTYPES_H 1
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#define __need_schedparam
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#include <bits/sched.h>
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/* Fast locks (not abstract because mutexes and conditions aren't abstract). */
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struct _pthread_fastlock
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{
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long int __status; /* "Free" or "taken" or head of waiting list */
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int __spinlock; /* Used by compare_and_swap emulation. Also,
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adaptive SMP lock stores spin count here. */
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};
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#ifndef _PTHREAD_DESCR_DEFINED
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/* Thread descriptors */
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typedef struct _pthread_descr_struct *_pthread_descr;
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# define _PTHREAD_DESCR_DEFINED
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#endif
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/* Attributes for threads. */
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typedef struct __pthread_attr_s
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{
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int __detachstate;
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int __schedpolicy;
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struct __sched_param __schedparam;
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int __inheritsched;
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int __scope;
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size_t __guardsize;
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int __stackaddr_set;
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void *__stackaddr;
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size_t __stacksize;
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} pthread_attr_t;
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/* Conditions (not abstract because of PTHREAD_COND_INITIALIZER */
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#ifdef __GLIBC_HAVE_LONG_LONG
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__extension__ typedef long long __pthread_cond_align_t;
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#else
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typedef long __pthread_cond_align_t;
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#endif
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typedef struct
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{
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struct _pthread_fastlock __c_lock; /* Protect against concurrent access */
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_pthread_descr __c_waiting; /* Threads waiting on this condition */
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char __padding[48 - sizeof (struct _pthread_fastlock)
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- sizeof (_pthread_descr) - sizeof (__pthread_cond_align_t)];
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__pthread_cond_align_t __align;
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} pthread_cond_t;
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/* Attribute for conditionally variables. */
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typedef struct
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{
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int __dummy;
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} pthread_condattr_t;
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/* Keys for thread-specific data */
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typedef unsigned int pthread_key_t;
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/* Mutexes (not abstract because of PTHREAD_MUTEX_INITIALIZER). */
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/* (The layout is unnatural to maintain binary compatibility
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with earlier releases of LinuxThreads.) */
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typedef struct
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{
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int __m_reserved; /* Reserved for future use */
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int __m_count; /* Depth of recursive locking */
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_pthread_descr __m_owner; /* Owner thread (if recursive or errcheck) */
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int __m_kind; /* Mutex kind: fast, recursive or errcheck */
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struct _pthread_fastlock __m_lock; /* Underlying fast lock */
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} pthread_mutex_t;
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/* Attribute for mutex. */
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typedef struct
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{
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int __mutexkind;
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} pthread_mutexattr_t;
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/* Once-only execution */
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typedef int pthread_once_t;
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#if defined __USE_UNIX98 || defined __USE_XOPEN2K
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/* Read-write locks. */
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typedef struct _pthread_rwlock_t
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{
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struct _pthread_fastlock __rw_lock; /* Lock to guarantee mutual exclusion */
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int __rw_readers; /* Number of readers */
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_pthread_descr __rw_writer; /* Identity of writer, or NULL if none */
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_pthread_descr __rw_read_waiting; /* Threads waiting for reading */
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_pthread_descr __rw_write_waiting; /* Threads waiting for writing */
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int __rw_kind; /* Reader/Writer preference selection */
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int __rw_pshared; /* Shared between processes or not */
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} pthread_rwlock_t;
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/* Attribute for read-write locks. */
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typedef struct
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{
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int __lockkind;
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int __pshared;
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} pthread_rwlockattr_t;
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#endif
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#ifdef __USE_XOPEN2K
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/* POSIX spinlock data type. */
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typedef volatile int pthread_spinlock_t;
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/* POSIX barrier. */
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typedef struct {
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struct _pthread_fastlock __ba_lock; /* Lock to guarantee mutual exclusion */
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int __ba_required; /* Threads needed for completion */
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int __ba_present; /* Threads waiting */
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_pthread_descr __ba_waiting; /* Queue of waiting threads */
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} pthread_barrier_t;
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/* barrier attribute */
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typedef struct {
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int __pshared;
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} pthread_barrierattr_t;
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#endif
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/* Thread identifiers */
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typedef unsigned long int pthread_t;
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#endif /* bits/pthreadtypes.h */
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