Mercurial > cpython-lru_cache-weakref

annotate Python/pystate.c @ 5925:93304b2e14cb legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Removed fatal errors from Py_Initmodule4() (and thus from Py_Initmodule(), which is a macro wrapper around it). The return value is now a NULL pointer if the initialization failed. This may make old modules fail with a SEGFAULT, since they don't expect this kind of failure. That's OK, since (a) it "never" happens, and (b) they would fail with a fatal error otherwise, anyway. Tons of extension modules should now check the return value of Py_Initmodule*() -- that's on my TODO list.
author Guido van Rossum <guido@python.org>
date Sat, 02 Aug 1997 03:07:46 +0000
parents 0d7851b37ad2
children 8d2194e22e67
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1 /***********************************************************
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
3 The Netherlands.
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
4
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
5 All Rights Reserved
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
6
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
7 Permission to use, copy, modify, and distribute this software and its
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
8 documentation for any purpose and without fee is hereby granted,
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
9 provided that the above copyright notice appear in all copies and that
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
10 both that copyright notice and this permission notice appear in
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
11 supporting documentation, and that the names of Stichting Mathematisch
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
12 Centrum or CWI or Corporation for National Research Initiatives or
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
13 CNRI not be used in advertising or publicity pertaining to
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
14 distribution of the software without specific, written prior
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
15 permission.
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
16
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
17 While CWI is the initial source for this software, a modified version
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
18 is made available by the Corporation for National Research Initiatives
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
19 (CNRI) at the Internet address ftp://ftp.python.org.
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
20
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
28 PERFORMANCE OF THIS SOFTWARE.
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
29
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
30 ******************************************************************/
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
31
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
32 /* Thread and interpreter state structures and their interfaces */
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
33
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
34 #include "Python.h"
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
35
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
36
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
37 static PyThreadState *current_tstate = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
38
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
39
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
40 PyInterpreterState *
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
41 PyInterpreterState_New()
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
42 {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
43 PyInterpreterState *interp = PyMem_NEW(PyInterpreterState, 1);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
44 if (interp != NULL) {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
45 interp->import_modules = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
46 interp->sysdict = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
47 interp->nthreads = 0;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
48 interp->nexitfuncs = 0;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
49 }
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
50 return interp;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
51 }
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
52
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
53
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
54 void
5567
932cfc5fc104 Don't use function prototypes in function definition headers.
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
55 PyInterpreterState_Delete(interp)
932cfc5fc104 Don't use function prototypes in function definition headers.
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
56 PyInterpreterState *interp;
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
57 {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
58 Py_XDECREF(interp->import_modules);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
59 Py_XDECREF(interp->sysdict);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
60
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
61 PyMem_DEL(interp);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
62 }
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
63
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
64
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
65 PyThreadState *
5567
932cfc5fc104 Don't use function prototypes in function definition headers.
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
66 PyThreadState_New(interp)
932cfc5fc104 Don't use function prototypes in function definition headers.
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
67 PyInterpreterState *interp;
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
68 {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
69 PyThreadState *tstate = PyMem_NEW(PyThreadState, 1);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
70 /* fprintf(stderr, "new tstate -> %p\n", tstate); */
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
71 if (tstate != NULL) {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
72 tstate->interpreter_state = interp;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
73
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
74 tstate->frame = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
75 tstate->recursion_depth = 0;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
76 tstate->ticker = 0;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
77 tstate->tracing = 0;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
78
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
79 tstate->curexc_type = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
80 tstate->curexc_value = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
81 tstate->curexc_traceback = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
82
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
83 tstate->exc_type = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
84 tstate->exc_value = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
85 tstate->exc_traceback = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
86
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
87 tstate->sys_profilefunc = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
88 tstate->sys_tracefunc = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
89 tstate->sys_checkinterval = 0;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
90
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
91 interp->nthreads++;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
92 }
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
93 return tstate;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
94 }
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
95
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
96
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
97 void
5567
932cfc5fc104 Don't use function prototypes in function definition headers.
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
98 PyThreadState_Delete(tstate)
932cfc5fc104 Don't use function prototypes in function definition headers.
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
99 PyThreadState *tstate;
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
100 {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
101 /* fprintf(stderr, "delete tstate %p\n", tstate); */
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
102 if (tstate == current_tstate)
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
103 current_tstate = NULL;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
104 tstate->interpreter_state->nthreads--;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
105
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
106 Py_XDECREF((PyObject *) (tstate->frame)); /* XXX really? */
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
107
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
108 Py_XDECREF(tstate->curexc_type);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
109 Py_XDECREF(tstate->curexc_value);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
110 Py_XDECREF(tstate->curexc_traceback);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
111
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
112 Py_XDECREF(tstate->exc_type);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
113 Py_XDECREF(tstate->exc_value);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
114 Py_XDECREF(tstate->exc_traceback);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
115
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
116 Py_XDECREF(tstate->sys_profilefunc);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
117 Py_XDECREF(tstate->sys_tracefunc);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
118
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
119 PyMem_DEL(tstate);
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
120 }
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
121
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
122
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
123 PyThreadState *
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
124 PyThreadState_Get()
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
125 {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
126 /* fprintf(stderr, "get tstate -> %p\n", current_tstate); */
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
127 return current_tstate;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
128 }
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
129
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
130
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
131 PyThreadState *
5567
932cfc5fc104 Don't use function prototypes in function definition headers.
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
132 PyThreadState_Swap(new)
932cfc5fc104 Don't use function prototypes in function definition headers.
Guido van Rossum <guido@python.org>
parents: 5405
diff changeset
133 PyThreadState *new;
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
134 {
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
135 PyThreadState *old = current_tstate;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
136 /* fprintf(stderr, "swap tstate new=%p <--> old=%p\n", new, old); */
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
137 current_tstate = new;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
138 return old;
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents:
diff changeset
139 }