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_size_t
23 #include <stddef.h>
24 
25 #define __need_schedparam
26 #include <bits/sched.h>
27 
28 #define __SIZEOF_PTHREAD_CONDATTR_T 4
29 
30 /* Fast locks (not abstract because mutexes and conditions aren't abstract). */
31 struct _pthread_fastlock
32 {
33   long int __status;   /* "Free" or "taken" or head of waiting list */
34   int __spinlock;      /* Used by compare_and_swap emulation. Also,
35 			  adaptive SMP lock stores spin count here. */
36 };
37 
38 #ifndef _PTHREAD_DESCR_DEFINED
39 /* Thread descriptors */
40 typedef struct _pthread_descr_struct *_pthread_descr;
41 # define _PTHREAD_DESCR_DEFINED
42 #endif
43 
44 
45 /* Attributes for threads.  */
46 typedef struct __pthread_attr_s
47 {
48   int __detachstate;
49   int __schedpolicy;
50   struct __sched_param __schedparam;
51   int __inheritsched;
52   int __scope;
53   size_t __guardsize;
54   int __stackaddr_set;
55   void *__stackaddr;
56   size_t __stacksize;
57 } pthread_attr_t;
58 
59 
60 /* Conditions (not abstract because of PTHREAD_COND_INITIALIZER */
61 typedef struct
62 {
63   struct _pthread_fastlock __c_lock; /* Protect against concurrent access */
64   _pthread_descr __c_waiting;        /* Threads waiting on this condition */
65 } pthread_cond_t;
66 
67 
68 typedef union
69 {
70   char __size[__SIZEOF_PTHREAD_CONDATTR_T];
71   int __align;
72 } pthread_condattr_t;
73 
74 
75 /* Keys for thread-specific data */
76 typedef unsigned int pthread_key_t;
77 
78 
79 /* Mutexes (not abstract because of PTHREAD_MUTEX_INITIALIZER).  */
80 /* (The layout is unnatural to maintain binary compatibility
81     with earlier releases of LinuxThreads.) */
82 typedef struct
83 {
84   int __m_reserved;               /* Reserved for future use */
85   int __m_count;                  /* Depth of recursive locking */
86   _pthread_descr __m_owner;       /* Owner thread (if recursive or errcheck) */
87   int __m_kind;                   /* Mutex kind: fast, recursive or errcheck */
88   struct _pthread_fastlock __m_lock; /* Underlying fast lock */
89 } pthread_mutex_t;
90 
91 
92 /* Attribute for mutex.  */
93 typedef struct
94 {
95   int __mutexkind;
96 } pthread_mutexattr_t;
97 
98 
99 /* Once-only execution */
100 typedef int pthread_once_t;
101 
102 
103 #if defined __USE_UNIX98 || defined __USE_XOPEN2K
104 /* Read-write locks.  */
105 typedef struct _pthread_rwlock_t
106 {
107   struct _pthread_fastlock __rw_lock; /* Lock to guarantee mutual exclusion */
108   int __rw_readers;                   /* Number of readers */
109   _pthread_descr __rw_writer;         /* Identity of writer, or NULL if none */
110   _pthread_descr __rw_read_waiting;   /* Threads waiting for reading */
111   _pthread_descr __rw_write_waiting;  /* Threads waiting for writing */
112   int __rw_kind;                      /* Reader/Writer preference selection */
113   int __rw_pshared;                   /* Shared between processes or not */
114 } pthread_rwlock_t;
115 
116 
117 /* Attribute for read-write locks.  */
118 typedef struct
119 {
120   int __lockkind;
121   int __pshared;
122 } pthread_rwlockattr_t;
123 #endif
124 
125 #ifdef __USE_XOPEN2K
126 /* POSIX spinlock data type.  */
127 typedef volatile int pthread_spinlock_t;
128 
129 /* POSIX barrier. */
130 typedef struct {
131   struct _pthread_fastlock __ba_lock; /* Lock to guarantee mutual exclusion */
132   int __ba_required;                  /* Threads needed for completion */
133   int __ba_present;                   /* Threads waiting */
134   _pthread_descr __ba_waiting;        /* Queue of waiting threads */
135 } pthread_barrier_t;
136 
137 /* barrier attribute */
138 typedef struct {
139   int __pshared;
140 } pthread_barrierattr_t;
141 
142 #endif
143 
144 
145 /* Thread identifiers */
146 typedef unsigned long int pthread_t;
147 
148 #endif	/* bits/pthreadtypes.h */
149