1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/* Threads compatibily routines for libgcc2 for VxWorks. */
/* Compile this one with gcc. */
/* Copyright (C) 1997 Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@wrs.com>.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* As a special exception, if you link this library with other files,
some of which are compiled with GCC, to produce an executable,
this library does not by itself cause the resulting executable
to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public License. */
#ifndef __gthr_vxworks_h
#define __gthr_vxworks_h
/* POSIX threads specific definitions.
Easy, since the interface is just one-to-one mapping. */
#define __GTHREADS 1
#include <vxWorks.h>
#include <semLib.h>
/* typedef void *SEM_ID; */
typedef int __gthread_key_t;
typedef char __gthread_once_t;
typedef SEM_ID __gthread_mutex_t;
#define __GTHREAD_MUTEX_INIT 0
#define __GTHREAD_ONCE_INIT 0
#ifndef REG_SAVED_REG
static inline int
__gthread_once (__gthread_once_t *once, void (*func) ())
{
(*func)();
return 0;
}
extern __gthread_key_t eh_context_key;
/* This is not the right way to do it, but the semantic of pthreads
don't map well enough onto VxWorks. */
static void
__ehdtor (void *pTcb)
{
int tid = (int) pTcb;
void *p = (void*)taskVarGet(tid, &eh_context_key);
if (p != (void*)-1)
{
if (p)
free (p);
taskVarSet(tid, &eh_context_key, 0);
}
}
/* This only works for the code in libgcc2.c. */
static inline int
__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
{
*key = 0;
/* Do this first so that the task variables are visible during the
running of the delete hook. */
taskVarInit();
/* We don't have a way to track dtor here, so instead, we
register a generic routine that can cleanup any task. */
taskDeleteHookAdd (__ehdtor);
return 0;
}
#define __gthread_setspecific(key, ptr) \
(key = (int) ptr, 0)
static inline int
__gthread_key_dtor (__gthread_key_t key, void *ptr)
{
/* Just reset the key value to zero. */
if (ptr)
return __gthread_setspecific (key, 0);
else
return 0;
}
#define __gthread_key_delete(key) \
taskVarDelete (taskIdSelf (), &key)
#define __gthread_getspecific(key) \
((key == 0) \
? ((taskVarAdd (taskIdSelf (), &key) != OK) \
? (__terminate (), (void*)0) \
: (void*)0) \
: (void*)key)
#endif
static inline int
__gthread_mutex_lock (__gthread_mutex_t *mutex)
{
if (*mutex == 0)
*mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE);
return semTake (*mutex, WAIT_FOREVER);
}
static inline int
__gthread_mutex_trylock (__gthread_mutex_t *mutex)
{
if (*mutex == 0)
*mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE);
return semTake (*mutex, NO_WAIT);
}
static inline int
__gthread_mutex_unlock (__gthread_mutex_t *mutex)
{
/* We could return the */
return semGive (*mutex);
}
#endif /* not __gthr_vxworks_h */
|
