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annotate Include/ceval.h @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents b36cb4602e21
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #ifndef Py_CEVAL_H
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2 #define Py_CEVAL_H
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3 #ifdef __cplusplus
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4 extern "C" {
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5 #endif
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6
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7
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8 /* Interface to random parts in ceval.c */
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9
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10 PyAPI_FUNC(PyObject *) PyEval_CallObjectWithKeywords(
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11 PyObject *, PyObject *, PyObject *);
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12
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13 /* Inline this */
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14 #define PyEval_CallObject(func,arg) \
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15 PyEval_CallObjectWithKeywords(func, arg, (PyObject *)NULL)
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16
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17 PyAPI_FUNC(PyObject *) PyEval_CallFunction(PyObject *obj,
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18 const char *format, ...);
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19 PyAPI_FUNC(PyObject *) PyEval_CallMethod(PyObject *obj,
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20 const char *methodname,
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21 const char *format, ...);
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22
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23 PyAPI_FUNC(void) PyEval_SetProfile(Py_tracefunc, PyObject *);
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24 PyAPI_FUNC(void) PyEval_SetTrace(Py_tracefunc, PyObject *);
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25
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26 struct _frame; /* Avoid including frameobject.h */
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27
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28 PyAPI_FUNC(PyObject *) PyEval_GetBuiltins(void);
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29 PyAPI_FUNC(PyObject *) PyEval_GetGlobals(void);
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30 PyAPI_FUNC(PyObject *) PyEval_GetLocals(void);
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31 PyAPI_FUNC(struct _frame *) PyEval_GetFrame(void);
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32 PyAPI_FUNC(int) PyEval_GetRestricted(void);
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33
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34 /* Look at the current frame's (if any) code's co_flags, and turn on
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35 the corresponding compiler flags in cf->cf_flags. Return 1 if any
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36 flag was set, else return 0. */
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37 PyAPI_FUNC(int) PyEval_MergeCompilerFlags(PyCompilerFlags *cf);
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38
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39 PyAPI_FUNC(int) Py_FlushLine(void);
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41 PyAPI_FUNC(int) Py_AddPendingCall(int (*func)(void *), void *arg);
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42 PyAPI_FUNC(int) Py_MakePendingCalls(void);
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43
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44 /* Protection against deeply nested recursive calls */
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45 PyAPI_FUNC(void) Py_SetRecursionLimit(int);
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46 PyAPI_FUNC(int) Py_GetRecursionLimit(void);
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47
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48 #define Py_EnterRecursiveCall(where) \
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49 (_Py_MakeRecCheck(PyThreadState_GET()->recursion_depth) && \
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50 _Py_CheckRecursiveCall(where))
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51 #define Py_LeaveRecursiveCall() \
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52 (--PyThreadState_GET()->recursion_depth)
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53 PyAPI_FUNC(int) _Py_CheckRecursiveCall(char *where);
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54 PyAPI_DATA(int) _Py_CheckRecursionLimit;
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55 #ifdef USE_STACKCHECK
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56 # define _Py_MakeRecCheck(x) (++(x) > --_Py_CheckRecursionLimit)
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57 #else
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58 # define _Py_MakeRecCheck(x) (++(x) > _Py_CheckRecursionLimit)
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59 #endif
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60
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61 PyAPI_FUNC(const char *) PyEval_GetFuncName(PyObject *);
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62 PyAPI_FUNC(const char *) PyEval_GetFuncDesc(PyObject *);
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63
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64 PyAPI_FUNC(PyObject *) PyEval_GetCallStats(PyObject *);
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65 PyAPI_FUNC(PyObject *) PyEval_EvalFrame(struct _frame *);
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66 PyAPI_FUNC(PyObject *) PyEval_EvalFrameEx(struct _frame *f, int exc);
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67
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68 /* this used to be handled on a per-thread basis - now just two globals */
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69 PyAPI_DATA(volatile int) _Py_Ticker;
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70 PyAPI_DATA(int) _Py_CheckInterval;
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71
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72 /* Interface for threads.
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73
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74 A module that plans to do a blocking system call (or something else
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75 that lasts a long time and doesn't touch Python data) can allow other
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76 threads to run as follows:
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77
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78 ...preparations here...
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79 Py_BEGIN_ALLOW_THREADS
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80 ...blocking system call here...
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81 Py_END_ALLOW_THREADS
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82 ...interpret result here...
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83
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84 The Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS pair expands to a
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85 {}-surrounded block.
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86 To leave the block in the middle (e.g., with return), you must insert
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87 a line containing Py_BLOCK_THREADS before the return, e.g.
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88
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89 if (...premature_exit...) {
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90 Py_BLOCK_THREADS
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91 PyErr_SetFromErrno(PyExc_IOError);
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92 return NULL;
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93 }
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94
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95 An alternative is:
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96
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97 Py_BLOCK_THREADS
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98 if (...premature_exit...) {
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99 PyErr_SetFromErrno(PyExc_IOError);
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100 return NULL;
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101 }
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102 Py_UNBLOCK_THREADS
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103
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104 For convenience, that the value of 'errno' is restored across
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105 Py_END_ALLOW_THREADS and Py_BLOCK_THREADS.
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106
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107 WARNING: NEVER NEST CALLS TO Py_BEGIN_ALLOW_THREADS AND
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108 Py_END_ALLOW_THREADS!!!
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109
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110 The function PyEval_InitThreads() should be called only from
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111 initthread() in "threadmodule.c".
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112
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113 Note that not yet all candidates have been converted to use this
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114 mechanism!
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115 */
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116
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117 PyAPI_FUNC(PyThreadState *) PyEval_SaveThread(void);
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118 PyAPI_FUNC(void) PyEval_RestoreThread(PyThreadState *);
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119
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120 #ifdef WITH_THREAD
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121
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122 PyAPI_FUNC(int) PyEval_ThreadsInitialized(void);
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123 PyAPI_FUNC(void) PyEval_InitThreads(void);
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124 PyAPI_FUNC(void) PyEval_AcquireLock(void);
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125 PyAPI_FUNC(void) PyEval_ReleaseLock(void);
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126 PyAPI_FUNC(void) PyEval_AcquireThread(PyThreadState *tstate);
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127 PyAPI_FUNC(void) PyEval_ReleaseThread(PyThreadState *tstate);
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128 PyAPI_FUNC(void) PyEval_ReInitThreads(void);
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129
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130 #define Py_BEGIN_ALLOW_THREADS { \
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131 PyThreadState *_save; \
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132 _save = PyEval_SaveThread();
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133 #define Py_BLOCK_THREADS PyEval_RestoreThread(_save);
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134 #define Py_UNBLOCK_THREADS _save = PyEval_SaveThread();
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135 #define Py_END_ALLOW_THREADS PyEval_RestoreThread(_save); \
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136 }
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137
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138 #else /* !WITH_THREAD */
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139
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140 #define Py_BEGIN_ALLOW_THREADS {
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141 #define Py_BLOCK_THREADS
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142 #define Py_UNBLOCK_THREADS
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143 #define Py_END_ALLOW_THREADS }
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144
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145 #endif /* !WITH_THREAD */
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146
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147 PyAPI_FUNC(int) _PyEval_SliceIndex(PyObject *, Py_ssize_t *);
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148
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149
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150 #ifdef __cplusplus
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151 }
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152 #endif
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153 #endif /* !Py_CEVAL_H */