1 /* Linuxthreads - a simple clone()-based implementation of Posix */
2 /* threads for Linux. */
3 /* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */
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. */
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. */
15 #if !defined _BITS_TYPES_H && !defined _PTHREAD_H
16 # error "Never include <bits/pthreadtypes.h> directly; use <sys/types.h> instead."
19 #ifndef _BITS_PTHREADTYPES_H
20 #define _BITS_PTHREADTYPES_H 1
22 #define __need_schedparam
23 #include <bits/sched.h>
25 /* Fast locks (not abstract because mutexes and conditions aren't abstract). */
26 struct _pthread_fastlock
28 long int __status; /* "Free" or "taken" or head of waiting list */
29 int __spinlock; /* For compare-and-swap emulation */
32 #ifndef _PTHREAD_DESCR_DEFINED
33 /* Thread descriptors */
34 typedef struct _pthread_descr_struct *_pthread_descr;
35 # define _PTHREAD_DESCR_DEFINED
39 /* Attributes for threads. */
44 struct __sched_param __schedparam;
54 /* Conditions (not abstract because of PTHREAD_COND_INITIALIZER */
57 struct _pthread_fastlock __c_lock; /* Protect against concurrent access */
58 _pthread_descr __c_waiting; /* Threads waiting on this condition */
62 /* Attribute for conditionally variables. */
68 /* Keys for thread-specific data */
69 typedef unsigned int pthread_key_t;
72 /* Mutexes (not abstract because of PTHREAD_MUTEX_INITIALIZER). */
73 /* (The layout is unnatural to maintain binary compatibility
74 with earlier releases of LinuxThreads.) */
77 int __m_reserved; /* Reserved for future use */
78 int __m_count; /* Depth of recursive locking */
79 _pthread_descr __m_owner; /* Owner thread (if recursive or errcheck) */
80 int __m_kind; /* Mutex kind: fast, recursive or errcheck */
81 struct _pthread_fastlock __m_lock; /* Underlying fast lock */
85 /* Attribute for mutex. */
89 } pthread_mutexattr_t;
92 /* Once-only execution */
93 typedef int pthread_once_t;
97 /* Read-write locks. */
98 typedef struct _pthread_rwlock_t
100 struct _pthread_fastlock __rw_lock; /* Lock to guarantee mutual exclusion */
101 int __rw_readers; /* Number of readers */
102 _pthread_descr __rw_writer; /* Identity of writer, or NULL if none */
103 _pthread_descr __rw_read_waiting; /* Threads waiting for reading */
104 _pthread_descr __rw_write_waiting; /* Threads waiting for writing */
105 int __rw_kind; /* Reader/Writer preference selection */
106 int __rw_pshared; /* Shared between processes or not */
110 /* Attribute for read-write locks. */
115 } pthread_rwlockattr_t;
119 /* Thread identifiers */
120 typedef unsigned long int pthread_t;
122 #endif /* bits/pthreadtypes.h */