1/* Linuxthreads - a simple clone()-based implementation of Posix */ 2/* threads for Linux. */ 3/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ 4/* */ 5/* This program is free software; you can redistribute it and/or */ 6/* modify it under the terms of the GNU Library General Public License */ 7/* as published by the Free Software Foundation; either version 2 */ 8/* of the License, or (at your option) any later version. */ 9/* */ 10/* This program 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 */ 13/* GNU Library General Public License for more details. */ 14 15#if !defined _BITS_TYPES_H && !defined _PTHREAD_H 16# error "Never include <bits/pthreadtypes.h> directly; use <sys/types.h> instead." 17#endif 18 19#ifndef _BITS_PTHREADTYPES_H 20#define _BITS_PTHREADTYPES_H 1 21 22#define __need_schedparam 23#include <bits/sched.h> 24 25/* Fast locks (not abstract because mutexes and conditions aren't abstract). */ 26struct _pthread_fastlock 27{ 28 long int __status; /* "Free" or "taken" or head of waiting list */ 29 int __spinlock; /* Used by compare_and_swap emulation. Also, 30 adaptive SMP lock stores spin count here. */ 31}; 32 33#ifndef _PTHREAD_DESCR_DEFINED 34/* Thread descriptors */ 35typedef struct _pthread_descr_struct *_pthread_descr; 36# define _PTHREAD_DESCR_DEFINED 37#endif 38 39 40/* Attributes for threads. */ 41typedef struct __pthread_attr_s 42{ 43 int __detachstate; 44 int __schedpolicy; 45 struct __sched_param __schedparam; 46 int __inheritsched; 47 int __scope; 48 size_t __guardsize; 49 int __stackaddr_set; 50 void *__stackaddr; 51 size_t __stacksize; 52} pthread_attr_t; 53 54 55/* Conditions (not abstract because of PTHREAD_COND_INITIALIZER */ 56typedef struct 57{ 58 struct _pthread_fastlock __c_lock; /* Protect against concurrent access */ 59 _pthread_descr __c_waiting; /* Threads waiting on this condition */ 60} pthread_cond_t; 61 62 63/* Attribute for conditionally variables. */ 64typedef struct 65{ 66 int __dummy; 67} pthread_condattr_t; 68 69/* Keys for thread-specific data */ 70typedef unsigned int pthread_key_t; 71 72 73/* Mutexes (not abstract because of PTHREAD_MUTEX_INITIALIZER). */ 74/* (The layout is unnatural to maintain binary compatibility 75 with earlier releases of LinuxThreads.) */ 76typedef struct 77{ 78 int __m_reserved; /* Reserved for future use */ 79 int __m_count; /* Depth of recursive locking */ 80 _pthread_descr __m_owner; /* Owner thread (if recursive or errcheck) */ 81 int __m_kind; /* Mutex kind: fast, recursive or errcheck */ 82 struct _pthread_fastlock __m_lock; /* Underlying fast lock */ 83} pthread_mutex_t; 84 85 86/* Attribute for mutex. */ 87typedef struct 88{ 89 int __mutexkind; 90} pthread_mutexattr_t; 91 92 93/* Once-only execution */ 94typedef int pthread_once_t; 95 96 97#if defined __USE_UNIX98 || defined __USE_XOPEN2K 98/* Read-write locks. */ 99typedef struct _pthread_rwlock_t 100{ 101 struct _pthread_fastlock __rw_lock; /* Lock to guarantee mutual exclusion */ 102 int __rw_readers; /* Number of readers */ 103 _pthread_descr __rw_writer; /* Identity of writer, or NULL if none */ 104 _pthread_descr __rw_read_waiting; /* Threads waiting for reading */ 105 _pthread_descr __rw_write_waiting; /* Threads waiting for writing */ 106 int __rw_kind; /* Reader/Writer preference selection */ 107 int __rw_pshared; /* Shared between processes or not */ 108} pthread_rwlock_t; 109 110 111/* Attribute for read-write locks. */ 112typedef struct 113{ 114 int __lockkind; 115 int __pshared; 116} pthread_rwlockattr_t; 117#endif 118 119#ifdef __USE_XOPEN2K 120/* POSIX spinlock data type. */ 121typedef volatile int pthread_spinlock_t; 122 123/* POSIX barrier. */ 124typedef struct { 125 struct _pthread_fastlock __ba_lock; /* Lock to guarantee mutual exclusion */ 126 int __ba_required; /* Threads needed for completion */ 127 int __ba_present; /* Threads waiting */ 128 _pthread_descr __ba_waiting; /* Queue of waiting threads */ 129} pthread_barrier_t; 130 131/* barrier attribute */ 132typedef struct { 133 int __pshared; 134} pthread_barrierattr_t; 135 136#endif 137 138 139/* Thread identifiers */ 140typedef unsigned long int pthread_t; 141 142#endif /* bits/pthreadtypes.h */ 143