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
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
/*
* Extension module used by multiprocessing package
*
* multiprocessing.c
*
* Copyright (c) 2006-2008, R Oudkerk
* Licensed to PSF under a Contributor Agreement.
*/
#include "multiprocessing.h"
/*[python input]
class HANDLE_converter(CConverter):
type = "HANDLE"
format_unit = '"F_HANDLE"'
[python start generated code]*/
/*[python end generated code: output=da39a3ee5e6b4b0d input=9fad6080b79ace91]*/
/*[clinic input]
module _multiprocessing
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=01e0745f380ac6e3]*/
#include "clinic/multiprocessing.c.h"
/*
* Function which raises exceptions based on error codes
*/
PyObject *
_PyMp_SetError(PyObject *Type, int num)
{
switch (num) {
#ifdef MS_WINDOWS
case MP_STANDARD_ERROR:
if (Type == NULL)
Type = PyExc_OSError;
PyErr_SetExcFromWindowsErr(Type, 0);
break;
case MP_SOCKET_ERROR:
if (Type == NULL)
Type = PyExc_OSError;
PyErr_SetExcFromWindowsErr(Type, WSAGetLastError());
break;
#else /* !MS_WINDOWS */
case MP_STANDARD_ERROR:
case MP_SOCKET_ERROR:
if (Type == NULL)
Type = PyExc_OSError;
PyErr_SetFromErrno(Type);
break;
#endif /* !MS_WINDOWS */
case MP_MEMORY_ERROR:
PyErr_NoMemory();
break;
case MP_EXCEPTION_HAS_BEEN_SET:
break;
default:
PyErr_Format(PyExc_RuntimeError,
"unknown error number %d", num);
}
return NULL;
}
#ifdef MS_WINDOWS
/*[clinic input]
_multiprocessing.closesocket
handle: HANDLE
/
[clinic start generated code]*/
static PyObject *
_multiprocessing_closesocket_impl(PyObject *module, HANDLE handle)
/*[clinic end generated code: output=214f359f900966f4 input=8a20706dd386c6cc]*/
{
int ret;
Py_BEGIN_ALLOW_THREADS
ret = closesocket((SOCKET) handle);
Py_END_ALLOW_THREADS
if (ret)
return PyErr_SetExcFromWindowsErr(PyExc_OSError, WSAGetLastError());
Py_RETURN_NONE;
}
/*[clinic input]
_multiprocessing.recv
handle: HANDLE
size: int
/
[clinic start generated code]*/
static PyObject *
_multiprocessing_recv_impl(PyObject *module, HANDLE handle, int size)
/*[clinic end generated code: output=92322781ba9ff598 input=6a5b0834372cee5b]*/
{
int nread;
PyObject *buf;
buf = PyBytes_FromStringAndSize(NULL, size);
if (!buf)
return NULL;
Py_BEGIN_ALLOW_THREADS
nread = recv((SOCKET) handle, PyBytes_AS_STRING(buf), size, 0);
Py_END_ALLOW_THREADS
if (nread < 0) {
Py_DECREF(buf);
return PyErr_SetExcFromWindowsErr(PyExc_OSError, WSAGetLastError());
}
_PyBytes_Resize(&buf, nread);
return buf;
}
/*[clinic input]
_multiprocessing.send
handle: HANDLE
buf: Py_buffer
/
[clinic start generated code]*/
static PyObject *
_multiprocessing_send_impl(PyObject *module, HANDLE handle, Py_buffer *buf)
/*[clinic end generated code: output=52d7df0519c596cb input=41dce742f98d2210]*/
{
int ret, length;
length = (int)Py_MIN(buf->len, INT_MAX);
Py_BEGIN_ALLOW_THREADS
ret = send((SOCKET) handle, buf->buf, length, 0);
Py_END_ALLOW_THREADS
if (ret < 0)
return PyErr_SetExcFromWindowsErr(PyExc_OSError, WSAGetLastError());
return PyLong_FromLong(ret);
}
#endif
/*[clinic input]
_multiprocessing.sem_unlink
name: str
/
[clinic start generated code]*/
static PyObject *
_multiprocessing_sem_unlink_impl(PyObject *module, const char *name)
/*[clinic end generated code: output=fcbfeb1ed255e647 input=bf939aff9564f1d5]*/
{
return _PyMp_sem_unlink(name);
}
/*
* Function table
*/
static PyMethodDef module_methods[] = {
#ifdef MS_WINDOWS
_MULTIPROCESSING_CLOSESOCKET_METHODDEF
_MULTIPROCESSING_RECV_METHODDEF
_MULTIPROCESSING_SEND_METHODDEF
#endif
#if !defined(POSIX_SEMAPHORES_NOT_ENABLED) && !defined(__ANDROID__)
_MULTIPROCESSING_SEM_UNLINK_METHODDEF
#endif
{NULL}
};
/*
* Initialize
*/
static int
multiprocessing_exec(PyObject *module)
{
#ifdef HAVE_MP_SEMAPHORE
/* Add _PyMp_SemLock type to module */
if (PyModule_AddType(module, &_PyMp_SemLockType) < 0) {
return -1;
}
{
PyObject *py_sem_value_max;
/* Some systems define SEM_VALUE_MAX as an unsigned value that
* causes it to be negative when used as an int (NetBSD).
*
* Issue #28152: Use (0) instead of 0 to fix a warning on dead code
* when using clang -Wunreachable-code. */
if ((int)(SEM_VALUE_MAX) < (0))
py_sem_value_max = PyLong_FromLong(INT_MAX);
else
py_sem_value_max = PyLong_FromLong(SEM_VALUE_MAX);
if (py_sem_value_max == NULL) {
return -1;
}
if (PyDict_SetItemString(_PyMp_SemLockType.tp_dict, "SEM_VALUE_MAX",
py_sem_value_max) < 0) {
Py_DECREF(py_sem_value_max);
return -1;
}
Py_DECREF(py_sem_value_max);
}
#endif
/* Add configuration macros */
PyObject *flags = PyDict_New();
if (!flags) {
return -1;
}
#define ADD_FLAG(name) \
do { \
PyObject *value = PyLong_FromLong(name); \
if (value == NULL) { \
Py_DECREF(flags); \
return -1; \
} \
if (PyDict_SetItemString(flags, #name, value) < 0) { \
Py_DECREF(flags); \
Py_DECREF(value); \
return -1; \
} \
Py_DECREF(value); \
} while (0)
#if defined(HAVE_SEM_OPEN) && !defined(POSIX_SEMAPHORES_NOT_ENABLED)
ADD_FLAG(HAVE_SEM_OPEN);
#endif
#ifdef HAVE_SEM_TIMEDWAIT
ADD_FLAG(HAVE_SEM_TIMEDWAIT);
#endif
#ifdef HAVE_BROKEN_SEM_GETVALUE
ADD_FLAG(HAVE_BROKEN_SEM_GETVALUE);
#endif
#ifdef HAVE_BROKEN_SEM_UNLINK
ADD_FLAG(HAVE_BROKEN_SEM_UNLINK);
#endif
if (PyModule_AddObject(module, "flags", flags) < 0) {
Py_DECREF(flags);
return -1;
}
return 0;
}
static PyModuleDef_Slot multiprocessing_slots[] = {
{Py_mod_exec, multiprocessing_exec},
{0, NULL}
};
static struct PyModuleDef multiprocessing_module = {
PyModuleDef_HEAD_INIT,
.m_name = "_multiprocessing",
.m_methods = module_methods,
.m_slots = multiprocessing_slots,
};
PyMODINIT_FUNC
PyInit__multiprocessing(void)
{
return PyModuleDef_Init(&multiprocessing_module);
}
|
