1/* Threads compatibility routines for libgcc2 and libobjc.
2   Compile this one with gcc.
3   Copyright (C) 2004-2020 Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 3, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17Under Section 7 of GPL version 3, you are granted additional
18permissions described in the GCC Runtime Library Exception, version
193.1, as published by the Free Software Foundation.
20
21You should have received a copy of the GNU General Public License and
22a copy of the GCC Runtime Library Exception along with this program;
23see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24<http://www.gnu.org/licenses/>.  */
25
26/* TPF needs its own version of gthr-*.h because TPF always links to
27   the thread library.  However, for performance reasons we still do not
28   want to issue thread api calls unless a check is made to see that we
29   are running as a thread.  */
30
31#ifndef GCC_GTHR_TPF_H
32#define GCC_GTHR_TPF_H
33
34/* POSIX threads specific definitions.
35   Easy, since the interface is just one-to-one mapping.  */
36
37#define __GTHREADS 1
38
39/* Some implementations of <pthread.h> require this to be defined.  */
40#ifndef _REENTRANT
41#define _REENTRANT 1
42#endif
43
44#include <pthread.h>
45#include <unistd.h>
46
47typedef pthread_key_t __gthread_key_t;
48typedef pthread_once_t __gthread_once_t;
49typedef pthread_mutex_t __gthread_mutex_t;
50typedef pthread_mutex_t __gthread_recursive_mutex_t;
51
52#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
53#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
54#elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
55#define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
56#endif
57
58#define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
59#define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
60#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
61
62#define NOTATHREAD   00
63#define ECBBASEPTR (unsigned long int) *(unsigned int *)0x00000514u
64#define ECBPG2PTR  ECBBASEPTR + 0x1000
65#define CE2THRCPTR *((unsigned char *)(ECBPG2PTR + 16))
66#define __tpf_pthread_active() (CE2THRCPTR != NOTATHREAD)
67
68#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
69# define __gthrw(name) \
70  static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
71# define __gthrw_(name) __gthrw_ ## name
72#else
73# define __gthrw(name)
74# define __gthrw_(name) name
75#endif
76
77__gthrw(pthread_once)
78__gthrw(pthread_key_create)
79__gthrw(pthread_key_delete)
80__gthrw(pthread_getspecific)
81__gthrw(pthread_setspecific)
82__gthrw(pthread_create)
83
84__gthrw(pthread_mutex_lock)
85__gthrw(pthread_mutex_trylock)
86__gthrw(pthread_mutex_unlock)
87__gthrw(pthread_mutexattr_init)
88__gthrw(pthread_mutexattr_settype)
89__gthrw(pthread_mutexattr_destroy)
90__gthrw(pthread_mutex_init)
91__gthrw(pthread_mutex_destroy)
92
93static inline int
94__gthread_active_p (void)
95{
96  return 1;
97}
98
99static inline int
100__gthread_once (__gthread_once_t *__once, void (*__func) (void))
101{
102  if (__tpf_pthread_active ())
103    return __gthrw_(pthread_once) (__once, __func);
104  else
105    return -1;
106}
107
108static inline int
109__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
110{
111  if (__tpf_pthread_active ())
112    return __gthrw_(pthread_key_create) (__key, __dtor);
113  else
114    return -1;
115}
116
117static inline int
118__gthread_key_delete (__gthread_key_t __key)
119{
120  if (__tpf_pthread_active ())
121    return __gthrw_(pthread_key_delete) (__key);
122  else
123    return -1;
124}
125
126static inline void *
127__gthread_getspecific (__gthread_key_t __key)
128{
129  if (__tpf_pthread_active ())
130    return __gthrw_(pthread_getspecific) (__key);
131  else
132    return NULL;
133}
134
135static inline int
136__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
137{
138  if (__tpf_pthread_active ())
139    return __gthrw_(pthread_setspecific) (__key, __ptr);
140  else
141    return -1;
142}
143
144static inline int
145__gthread_mutex_destroy (__gthread_mutex_t *__mutex)
146{
147  if (__tpf_pthread_active ())
148    return __gthrw_(pthread_mutex_destroy) (__mutex);
149  else
150    return 0;
151}
152
153static inline int
154__gthread_mutex_lock (__gthread_mutex_t *__mutex)
155{
156  if (__tpf_pthread_active ())
157    return __gthrw_(pthread_mutex_lock) (__mutex);
158  else
159    return 0;
160}
161
162static inline int
163__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
164{
165  if (__tpf_pthread_active ())
166    return __gthrw_(pthread_mutex_trylock) (__mutex);
167  else
168    return 0;
169}
170
171static inline int
172__gthread_mutex_unlock (__gthread_mutex_t *__mutex)
173{
174  if (__tpf_pthread_active ())
175    return __gthrw_(pthread_mutex_unlock) (__mutex);
176  else
177    return 0;
178}
179
180static inline int
181__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
182{
183  if (__tpf_pthread_active ())
184    return __gthread_mutex_lock (__mutex);
185  else
186    return 0;
187}
188
189static inline int
190__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
191{
192  if (__tpf_pthread_active ())
193    return __gthread_mutex_trylock (__mutex);
194  else
195    return 0;
196}
197
198static inline int
199__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
200{
201  if (__tpf_pthread_active ())
202    return __gthread_mutex_unlock (__mutex);
203  else
204    return 0;
205}
206
207static inline int
208__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
209{
210  if (__tpf_pthread_active ())
211    {
212      pthread_mutexattr_t __attr;
213      int __r;
214
215      __r = __gthrw_(pthread_mutexattr_init) (&__attr);
216      if (!__r)
217	__r = __gthrw_(pthread_mutexattr_settype) (&__attr,
218						   PTHREAD_MUTEX_RECURSIVE);
219      if (!__r)
220	__r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
221      if (!__r)
222	__r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
223      return __r;
224    }
225  return 0;
226}
227
228static inline int
229__gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex)
230{
231  return __gthread_mutex_destroy (__mutex);
232}
233
234#endif /* ! GCC_GTHR_TPF_H */
235