Mercurial > cpython-lru_cache-weakref

annotate Python/frozenmain.c @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents e408e821d6c8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 /* Python interpreter main program for frozen scripts */
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3
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4 #include "Python.h"
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5 #include <locale.h>
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6
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7 #ifdef MS_WINDOWS
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8 extern void PyWinFreeze_ExeInit(void);
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9 extern void PyWinFreeze_ExeTerm(void);
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10 extern int PyInitFrozenExtensions(void);
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11 #endif
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12
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13 /* Main program */
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14
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15 int
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16 Py_FrozenMain(int argc, char **argv)
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17 {
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18 char *p;
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19 int i, n, sts = 1;
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20 int inspect = 0;
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21 int unbuffered = 0;
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22 char *oldloc = NULL;
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23 wchar_t **argv_copy = NULL;
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24 /* We need a second copies, as Python might modify the first one. */
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25 wchar_t **argv_copy2 = NULL;
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26
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27 argv_copy = PyMem_RawMalloc(sizeof(wchar_t*) * argc);
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28 argv_copy2 = PyMem_RawMalloc(sizeof(wchar_t*) * argc);
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29 if (!argv_copy || !argv_copy2) {
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30 fprintf(stderr, "out of memory\n");
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31 goto error;
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32 }
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33
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34 Py_FrozenFlag = 1; /* Suppress errors from getpath.c */
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35
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36 if ((p = Py_GETENV("PYTHONINSPECT")) && *p != '\0')
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37 inspect = 1;
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38 if ((p = Py_GETENV("PYTHONUNBUFFERED")) && *p != '\0')
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39 unbuffered = 1;
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40
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41 if (unbuffered) {
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42 setbuf(stdin, (char *)NULL);
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43 setbuf(stdout, (char *)NULL);
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44 setbuf(stderr, (char *)NULL);
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45 }
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46
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47 oldloc = _PyMem_RawStrdup(setlocale(LC_ALL, NULL));
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48 if (!oldloc) {
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49 fprintf(stderr, "out of memory\n");
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50 goto error;
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51 }
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52
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53 setlocale(LC_ALL, "");
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54 for (i = 0; i < argc; i++) {
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55 argv_copy[i] = _Py_char2wchar(argv[i], NULL);
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56 argv_copy2[i] = argv_copy[i];
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57 if (!argv_copy[i]) {
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58 fprintf(stderr, "Unable to decode the command line argument #%i\n",
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59 i + 1);
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60 argc = i;
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61 goto error;
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62 }
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63 }
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64 setlocale(LC_ALL, oldloc);
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65 PyMem_RawFree(oldloc);
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66 oldloc = NULL;
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67
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68 #ifdef MS_WINDOWS
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69 PyInitFrozenExtensions();
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70 #endif /* MS_WINDOWS */
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71 Py_SetProgramName(argv_copy[0]);
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72 Py_Initialize();
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73 #ifdef MS_WINDOWS
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74 PyWinFreeze_ExeInit();
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75 #endif
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76
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77 if (Py_VerboseFlag)
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78 fprintf(stderr, "Python %s\n%s\n",
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79 Py_GetVersion(), Py_GetCopyright());
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80
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81 PySys_SetArgv(argc, argv_copy);
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82
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83 n = PyImport_ImportFrozenModule("__main__");
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84 if (n == 0)
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85 Py_FatalError("__main__ not frozen");
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86 if (n < 0) {
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87 PyErr_Print();
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88 sts = 1;
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89 }
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90 else
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91 sts = 0;
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92
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93 if (inspect && isatty((int)fileno(stdin)))
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94 sts = PyRun_AnyFile(stdin, "<stdin>") != 0;
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95
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96 #ifdef MS_WINDOWS
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97 PyWinFreeze_ExeTerm();
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98 #endif
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99 Py_Finalize();
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100
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101 error:
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102 PyMem_RawFree(argv_copy);
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103 if (argv_copy2) {
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104 for (i = 0; i < argc; i++)
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105 PyMem_RawFree(argv_copy2[i]);
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106 PyMem_RawFree(argv_copy2);
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107 }
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108 PyMem_RawFree(oldloc);
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109 return sts;
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110 }