Repository navigation
Expand file tree
/
Copy paththread.c
More file actions
263 lines (223 loc) · 6.25 KB
/
Copy paththread.c
File metadata and controls
263 lines (223 loc) · 6.25 KB
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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
/* Thread package.
This is intended to be usable independently from Python.
The implementation for system foobar is in a file thread_foobar.h
which is included by this file dependent on config settings.
Stuff shared by all thread_*.h files is collected here. */
#include "Python.h"
#include "pycore_pystate.h" // _PyInterpreterState_GET()
#include "pycore_structseq.h" // _PyStructSequence_FiniType()
#ifndef _POSIX_THREADS
/* This means pthreads are not implemented in libc headers, hence the macro
not present in unistd.h. But they still can be implemented as an external
library (e.g. gnu pth in pthread emulation) */
# ifdef HAVE_PTHREAD_H
# include <pthread.h> /* _POSIX_THREADS */
# endif
#endif
#ifndef DONT_HAVE_STDIO_H
#include <stdio.h>
#endif
#include <stdlib.h>
#ifndef _POSIX_THREADS
/* Check if we're running on HP-UX and _SC_THREADS is defined. If so, then
enough of the Posix threads package is implemented to support python
threads.
This is valid for HP-UX 11.23 running on an ia64 system. If needed, add
a check of __ia64 to verify that we're running on an ia64 system instead
of a pa-risc system.
*/
#ifdef __hpux
#ifdef _SC_THREADS
#define _POSIX_THREADS
#endif
#endif
#endif /* _POSIX_THREADS */
#ifdef Py_DEBUG
static int thread_debug = 0;
# define dprintf(args) (void)((thread_debug & 1) && printf args)
#else
# define dprintf(args)
#endif
static int initialized;
static void PyThread__init_thread(void); /* Forward */
void
PyThread_init_thread(void)
{
#ifdef Py_DEBUG
const char *p = Py_GETENV("PYTHONTHREADDEBUG");
if (p) {
if (*p)
thread_debug = atoi(p);
else
thread_debug = 1;
}
#endif /* Py_DEBUG */
if (initialized)
return;
initialized = 1;
dprintf(("PyThread_init_thread called\n"));
PyThread__init_thread();
}
void
_PyThread_debug_deprecation(void)
{
#ifdef Py_DEBUG
if (thread_debug) {
// Flush previous dprintf() logs
fflush(stdout);
if (PyErr_WarnEx(PyExc_DeprecationWarning,
"The threading debug (PYTHONTHREADDEBUG environment "
"variable) is deprecated and will be removed "
"in Python 3.12",
0))
{
_PyErr_WriteUnraisableMsg("at Python startup", NULL);
}
}
#endif
}
#if defined(HAVE_PTHREAD_STUBS)
# define PYTHREAD_NAME "pthread-stubs"
# include "thread_pthread_stubs.h"
#elif defined(_POSIX_THREADS)
# if defined(__EMSCRIPTEN__) && !defined(__EMSCRIPTEN_PTHREADS__)
# define PYTHREAD_NAME "pthread-stubs"
# else
# define PYTHREAD_NAME "pthread"
# endif
# include "thread_pthread.h"
#elif defined(NT_THREADS)
# define PYTHREAD_NAME "nt"
# include "thread_nt.h"
#else
# error "Require native threads. See https://bugs.python.org/issue31370"
#endif
/* return the current thread stack size */
size_t
PyThread_get_stacksize(void)
{
return _PyInterpreterState_GET()->threads.stacksize;
}
/* Only platforms defining a THREAD_SET_STACKSIZE() macro
in thread_<platform>.h support changing the stack size.
Return 0 if stack size is valid,
-1 if stack size value is invalid,
-2 if setting stack size is not supported. */
int
PyThread_set_stacksize(size_t size)
{
#if defined(THREAD_SET_STACKSIZE)
return THREAD_SET_STACKSIZE(size);
#else
return -2;
#endif
}
/* Thread Specific Storage (TSS) API
Cross-platform components of TSS API implementation.
*/
Py_tss_t *
PyThread_tss_alloc(void)
{
Py_tss_t *new_key = (Py_tss_t *)PyMem_RawMalloc(sizeof(Py_tss_t));
if (new_key == NULL) {
return NULL;
}
new_key->_is_initialized = 0;
return new_key;
}
void
PyThread_tss_free(Py_tss_t *key)
{
if (key != NULL) {
PyThread_tss_delete(key);
PyMem_RawFree((void *)key);
}
}
int
PyThread_tss_is_created(Py_tss_t *key)
{
assert(key != NULL);
return key->_is_initialized;
}
PyDoc_STRVAR(threadinfo__doc__,
"sys.thread_info\n\
\n\
A named tuple holding information about the thread implementation.");
static PyStructSequence_Field threadinfo_fields[] = {
{"name", "name of the thread implementation"},
{"lock", "name of the lock implementation"},
{"version", "name and version of the thread library"},
{0}
};
static PyStructSequence_Desc threadinfo_desc = {
"sys.thread_info", /* name */
threadinfo__doc__, /* doc */
threadinfo_fields, /* fields */
3
};
static PyTypeObject ThreadInfoType;
PyObject*
PyThread_GetInfo(void)
{
PyObject *threadinfo, *value;
int pos = 0;
#if (defined(_POSIX_THREADS) && defined(HAVE_CONFSTR) \
&& defined(_CS_GNU_LIBPTHREAD_VERSION))
char buffer[255];
int len;
#endif
if (ThreadInfoType.tp_name == 0) {
if (PyStructSequence_InitType2(&ThreadInfoType, &threadinfo_desc) < 0)
return NULL;
}
threadinfo = PyStructSequence_New(&ThreadInfoType);
if (threadinfo == NULL)
return NULL;
value = PyUnicode_FromString(PYTHREAD_NAME);
if (value == NULL) {
Py_DECREF(threadinfo);
return NULL;
}
PyStructSequence_SET_ITEM(threadinfo, pos++, value);
#ifdef HAVE_PTHREAD_STUBS
value = Py_NewRef(Py_None);
#elif defined(_POSIX_THREADS)
#ifdef USE_SEMAPHORES
value = PyUnicode_FromString("semaphore");
#else
value = PyUnicode_FromString("mutex+cond");
#endif
if (value == NULL) {
Py_DECREF(threadinfo);
return NULL;
}
#else
value = Py_NewRef(Py_None);
#endif
PyStructSequence_SET_ITEM(threadinfo, pos++, value);
#if (defined(_POSIX_THREADS) && defined(HAVE_CONFSTR) \
&& defined(_CS_GNU_LIBPTHREAD_VERSION))
value = NULL;
len = confstr(_CS_GNU_LIBPTHREAD_VERSION, buffer, sizeof(buffer));
if (1 < len && (size_t)len < sizeof(buffer)) {
value = PyUnicode_DecodeFSDefaultAndSize(buffer, len-1);
if (value == NULL)
PyErr_Clear();
}
if (value == NULL)
#endif
{
Py_INCREF(Py_None);
value = Py_None;
}
PyStructSequence_SET_ITEM(threadinfo, pos++, value);
return threadinfo;
}
void
_PyThread_FiniType(PyInterpreterState *interp)
{
if (!_Py_IsMainInterpreter(interp)) {
return;
}
_PyStructSequence_FiniType(&ThreadInfoType);
}