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; /* Used by compare_and_swap emulation. Also,
30 adaptive SMP lock stores spin count here. */
33 #ifndef _PTHREAD_DESCR_DEFINED
34 /* Thread descriptors */
35 typedef struct _pthread_descr_struct *_pthread_descr;
36 # define _PTHREAD_DESCR_DEFINED
40 /* Attributes for threads. */
41 typedef struct __pthread_attr_s
45 struct __sched_param __schedparam;
55 /* Conditions (not abstract because of PTHREAD_COND_INITIALIZER */
58 struct _pthread_fastlock __c_lock; /* Protect against concurrent access */
59 _pthread_descr __c_waiting; /* Threads waiting on this condition */
63 /* Attribute for conditionally variables. */
69 /* Keys for thread-specific data */
70 typedef unsigned int pthread_key_t;
73 /* Mutexes (not abstract because of PTHREAD_MUTEX_INITIALIZER). */
74 /* (The layout is unnatural to maintain binary compatibility
75 with earlier releases of LinuxThreads.) */
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 */
86 /* Attribute for mutex. */
90 } pthread_mutexattr_t;
93 /* Once-only execution */
94 typedef int pthread_once_t;
97 #if defined __USE_UNIX98 || defined __USE_XOPEN2K
98 /* Read-write locks. */
99 typedef struct _pthread_rwlock_t
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 */
111 /* Attribute for read-write locks. */
116 } pthread_rwlockattr_t;
120 /* POSIX spinlock data type. */
121 typedef volatile int pthread_spinlock_t;
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 */
131 /* barrier attribute */
134 } pthread_barrierattr_t;
139 /* Thread identifiers */
140 typedef unsigned long int pthread_t;
142 #endif /* bits/pthreadtypes.h */