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annotate Python/dynload_mac.c @ 11599:78fe87ce0ded legacy-trunk

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The old platform-specific contents of importdl.c, broken down into one file per platform (really: per style of Dl API; e.g. all platforms using dlopen() are grouped together in dynload_shlib.c.). This is part of a set of patches by Greg Stein.
author Guido van Rossum <guido@python.org>
date Mon, 20 Dec 1999 21:18:49 +0000
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children 528559a0b2f2
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11599
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* Support for dynamic loading of extension modules */
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33
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34 #include "Python.h"
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35 #include "importdl.h"
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36
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37 #include <Aliases.h>
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38 #include <CodeFragments.h>
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39 #ifdef SYMANTEC__CFM68K__ /* Really an older version of Universal Headers */
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40 #define CFragConnectionID ConnectionID
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41 #define kLoadCFrag 0x01
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42 #endif
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43 #ifdef USE_GUSI
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44 #include "TFileSpec.h" /* for Path2FSSpec() */
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45 #endif
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46 #include <Files.h>
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47 #include "macdefs.h"
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48 #include "macglue.h"
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49
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50
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51 const struct filedescr _PyImport_DynLoadFiletab[] = {
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52 {".slb", "rb", C_EXTENSION},
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53 #ifdef __CFM68K__
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54 {".CFM68K.slb", "rb", C_EXTENSION},
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55 #else
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56 {".ppc.slb", "rb", C_EXTENSION},
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57 #endif
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58 {0, 0}
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59 };
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60
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61
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62 dl_funcptr _PyImport_GetDynLoadFunc(const char *name, const char *funcname,
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63 const char *pathname, FILE *fp)
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64 {
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65 dl_funcptr p;
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66
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67 /*
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68 ** Dynamic loading of CFM shared libraries on the Mac. The
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69 ** code has become more convoluted than it was, because we
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70 ** want to be able to put multiple modules in a single
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71 ** file. For this reason, we have to determine the fragment
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72 ** name, and we cannot use the library entry point but we have
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73 ** to locate the correct init routine "by hand".
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74 */
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75 FSSpec libspec;
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76 CFragConnectionID connID;
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77 Ptr mainAddr;
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78 Str255 errMessage;
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79 OSErr err;
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80 #ifndef USE_GUSI
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81 Boolean isfolder, didsomething;
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82 #endif
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83 char buf[512];
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84 Str63 fragname;
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85 Ptr symAddr;
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86 CFragSymbolClass class;
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87
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88 /* First resolve any aliases to find the real file */
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89 #ifdef USE_GUSI
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90 err = Path2FSSpec(pathname, &libspec);
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91 #else
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92 (void)FSMakeFSSpec(0, 0, Pstring(pathname), &libspec);
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93 err = ResolveAliasFile(&libspec, 1, &isfolder, &didsomething);
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94 #endif
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95 if ( err ) {
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96 sprintf(buf, "%.255s: %.200s",
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97 pathname, PyMac_StrError(err));
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98 PyErr_SetString(PyExc_ImportError, buf);
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99 return NULL;
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100 }
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101 /* Next, determine the fragment name,
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102 by stripping '.slb' and 'module' */
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103 memcpy(fragname+1, libspec.name+1, libspec.name[0]);
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104 fragname[0] = libspec.name[0];
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105 if( strncmp((char *)(fragname+1+fragname[0]-4),
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106 ".slb", 4) == 0 )
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107 fragname[0] -= 4;
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108 if ( strncmp((char *)(fragname+1+fragname[0]-6),
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109 "module", 6) == 0 )
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110 fragname[0] -= 6;
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111 /* Load the fragment
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112 (or return the connID if it is already loaded */
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113 err = GetDiskFragment(&libspec, 0, 0, fragname,
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114 kLoadCFrag, &connID, &mainAddr,
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115 errMessage);
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116 if ( err ) {
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117 sprintf(buf, "%.*s: %.200s",
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118 errMessage[0], errMessage+1,
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119 PyMac_StrError(err));
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120 PyErr_SetString(PyExc_ImportError, buf);
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121 return NULL;
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122 }
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123 /* Locate the address of the correct init function */
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124 err = FindSymbol(connID, Pstring(funcname), &symAddr, &class);
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125 if ( err ) {
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126 sprintf(buf, "%s: %.200s",
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127 funcname, PyMac_StrError(err));
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128 PyErr_SetString(PyExc_ImportError, buf);
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129 return NULL;
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130 }
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131 p = (dl_funcptr)symAddr;
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132
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133 return p;
78fe87ce0ded The old platform-specific contents of importdl.c, broken down into one
Guido van Rossum <guido@python.org>
parents:
diff changeset
134 }