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 */
57 #ifdef __GLIBC_HAVE_LONG_LONG
58 __extension__ typedef long long __pthread_cond_align_t;
60 typedef long __pthread_cond_align_t;
65 struct _pthread_fastlock __c_lock; /* Protect against concurrent access */
66 _pthread_descr __c_waiting; /* Threads waiting on this condition */
67 char __padding[48 - sizeof (struct _pthread_fastlock)
68 - sizeof (_pthread_descr) - sizeof (__pthread_cond_align_t)];
69 __pthread_cond_align_t __align;
73 /* Attribute for conditionally variables. */
79 /* Keys for thread-specific data */
80 typedef unsigned int pthread_key_t;
83 /* Mutexes (not abstract because of PTHREAD_MUTEX_INITIALIZER). */
84 /* (The layout is unnatural to maintain binary compatibility
85 with earlier releases of LinuxThreads.) */
88 int __m_reserved; /* Reserved for future use */
89 int __m_count; /* Depth of recursive locking */
90 _pthread_descr __m_owner; /* Owner thread (if recursive or errcheck) */
91 int __m_kind; /* Mutex kind: fast, recursive or errcheck */
92 struct _pthread_fastlock __m_lock; /* Underlying fast lock */
96 /* Attribute for mutex. */
100 } pthread_mutexattr_t;
103 /* Once-only execution */
104 typedef int pthread_once_t;
107 #if defined __USE_UNIX98 || defined __USE_XOPEN2K
108 /* Read-write locks. */
109 typedef struct _pthread_rwlock_t
111 struct _pthread_fastlock __rw_lock; /* Lock to guarantee mutual exclusion */
112 int __rw_readers; /* Number of readers */
113 _pthread_descr __rw_writer; /* Identity of writer, or NULL if none */
114 _pthread_descr __rw_read_waiting; /* Threads waiting for reading */
115 _pthread_descr __rw_write_waiting; /* Threads waiting for writing */
116 int __rw_kind; /* Reader/Writer preference selection */
117 int __rw_pshared; /* Shared between processes or not */
121 /* Attribute for read-write locks. */
126 } pthread_rwlockattr_t;
130 /* POSIX spinlock data type. */
131 typedef __volatile__ int pthread_spinlock_t;
135 struct _pthread_fastlock __ba_lock; /* Lock to guarantee mutual exclusion */
136 int __ba_required; /* Threads needed for completion */
137 int __ba_present; /* Threads waiting */
138 _pthread_descr __ba_waiting; /* Queue of waiting threads */
141 /* barrier attribute */
144 } pthread_barrierattr_t;
149 /* Thread identifiers */
150 typedef unsigned long int pthread_t;
152 #endif /* bits/pthreadtypes.h */