author | William Roberts <williamr@symbian.org> |
Wed, 07 Jul 2010 22:30:23 +0100 | |
branch | GCC_SURGE |
changeset 88 | 3c15ef939dd3 |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
1
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Initial QEMU (symbian-qemu-0.9.1-12) import
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1 |
#include "Python.h" |
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2 |
#include <CoreFoundation/CFRunLoop.h> |
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3 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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/* These macros are defined in Python 2.3 but not 2.2 */ |
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5 |
#ifndef PyMODINIT_FUNC |
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6 |
#define PyMODINIT_FUNC void |
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7 |
#endif |
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8 |
#ifndef PyDoc_STRVAR |
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9 |
#define PyDoc_STRVAR(Var,Str) static char Var[] = Str |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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10 |
#endif |
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11 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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12 |
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#undef AUTOGIL_DEBUG |
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14 |
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15 |
static PyObject *AutoGILError; |
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16 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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17 |
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static void autoGILCallback(CFRunLoopObserverRef observer, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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19 |
CFRunLoopActivity activity, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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void *info) { |
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PyThreadState **p_tstate = (PyThreadState **)info; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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22 |
|
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23 |
switch (activity) { |
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case kCFRunLoopBeforeWaiting: |
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/* going to sleep, release GIL */ |
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26 |
#ifdef AUTOGIL_DEBUG |
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fprintf(stderr, "going to sleep, release GIL\n"); |
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#endif |
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*p_tstate = PyEval_SaveThread(); |
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30 |
break; |
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case kCFRunLoopAfterWaiting: |
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/* waking up, acquire GIL */ |
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33 |
#ifdef AUTOGIL_DEBUG |
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fprintf(stderr, "waking up, acquire GIL\n"); |
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#endif |
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PyEval_RestoreThread(*p_tstate); |
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*p_tstate = NULL; |
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38 |
break; |
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39 |
default: |
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40 |
break; |
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41 |
} |
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42 |
} |
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43 |
|
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static void infoRelease(const void *info) { |
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/* XXX This should get called when the run loop is deallocated, |
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but this doesn't seem to happen. So for now: leak. */ |
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PyMem_Free((void *)info); |
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48 |
} |
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49 |
|
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static PyObject * |
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autoGIL_installAutoGIL(PyObject *self) |
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{ |
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PyObject *tstate_dict = PyThreadState_GetDict(); |
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PyObject *v; |
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CFRunLoopRef rl; |
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PyThreadState **p_tstate; /* for use in the info field */ |
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CFRunLoopObserverContext context = {0, NULL, NULL, NULL, NULL}; |
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CFRunLoopObserverRef observer; |
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59 |
|
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if (tstate_dict == NULL) |
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return NULL; |
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v = PyDict_GetItemString(tstate_dict, "autoGIL.InstalledAutoGIL"); |
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if (v != NULL) { |
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/* we've already installed a callback for this thread */ |
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65 |
Py_INCREF(Py_None); |
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66 |
return Py_None; |
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67 |
} |
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68 |
|
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69 |
rl = CFRunLoopGetCurrent(); |
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70 |
if (rl == NULL) { |
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71 |
PyErr_SetString(AutoGILError, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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72 |
"can't get run loop for current thread"); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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73 |
return NULL; |
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74 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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75 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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76 |
p_tstate = PyMem_Malloc(sizeof(PyThreadState *)); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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77 |
if (p_tstate == NULL) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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78 |
PyErr_SetString(PyExc_MemoryError, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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79 |
"not enough memory to allocate " |
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80 |
"tstate pointer"); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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81 |
return NULL; |
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82 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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83 |
*p_tstate = NULL; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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84 |
context.info = (void *)p_tstate; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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85 |
context.release = infoRelease; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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86 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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87 |
observer = CFRunLoopObserverCreate( |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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88 |
NULL, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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89 |
kCFRunLoopBeforeWaiting | kCFRunLoopAfterWaiting, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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90 |
1, 0, autoGILCallback, &context); |
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91 |
if (observer == NULL) { |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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92 |
PyErr_SetString(AutoGILError, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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93 |
"can't create event loop observer"); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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94 |
return NULL; |
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95 |
} |
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|
96 |
CFRunLoopAddObserver(rl, observer, kCFRunLoopDefaultMode); |
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|
97 |
/* XXX how to check for errors? */ |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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98 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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99 |
/* register that we have installed a callback for this thread */ |
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|
100 |
if (PyDict_SetItemString(tstate_dict, "autoGIL.InstalledAutoGIL", |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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101 |
Py_None) < 0) |
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102 |
return NULL; |
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103 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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104 |
Py_INCREF(Py_None); |
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105 |
return Py_None; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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106 |
} |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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107 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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108 |
PyDoc_STRVAR(autoGIL_installAutoGIL_doc, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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109 |
"installAutoGIL() -> None\n\ |
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110 |
Install an observer callback in the event loop (CFRunLoop) for the\n\ |
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111 |
current thread, that will lock and unlock the Global Interpreter Lock\n\ |
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112 |
(GIL) at appropriate times, allowing other Python threads to run while\n\ |
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113 |
the event loop is idle." |
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114 |
); |
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115 |
|
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116 |
static PyMethodDef autoGIL_methods[] = { |
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117 |
{ |
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118 |
"installAutoGIL", |
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119 |
(PyCFunction)autoGIL_installAutoGIL, |
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METH_NOARGS, |
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121 |
autoGIL_installAutoGIL_doc |
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122 |
}, |
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123 |
{ 0, 0, 0, 0 } /* sentinel */ |
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124 |
}; |
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125 |
|
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126 |
PyDoc_STRVAR(autoGIL_docs, |
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"The autoGIL module provides a function (installAutoGIL) that\n\ |
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automatically locks and unlocks Python's Global Interpreter Lock\n\ |
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129 |
when running an event loop." |
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130 |
); |
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131 |
|
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132 |
PyMODINIT_FUNC |
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133 |
initautoGIL(void) |
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134 |
{ |
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135 |
PyObject *mod; |
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136 |
|
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137 |
if (PyErr_WarnPy3k("In 3.x, the autoGIL module is removed.", 1) < 0) |
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138 |
return; |
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139 |
|
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140 |
mod = Py_InitModule4("autoGIL", autoGIL_methods, autoGIL_docs, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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141 |
NULL, PYTHON_API_VERSION); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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142 |
if (mod == NULL) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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143 |
return; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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144 |
AutoGILError = PyErr_NewException("autoGIL.AutoGILError", |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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145 |
PyExc_Exception, NULL); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
146 |
if (AutoGILError == NULL) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
147 |
return; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
148 |
Py_INCREF(AutoGILError); |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
149 |
if (PyModule_AddObject(mod, "AutoGILError", |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
150 |
AutoGILError) < 0) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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|
151 |
return; |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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152 |
} |