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annotate Python/dynload_shlib.c @ 24042:63fbbed10714 legacy-trunk

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Simplify HTTPSConnection constructor. See discussion in SF bug 458463.
author Jeremy Hylton <jeremy@alum.mit.edu>
date Fri, 28 Jun 2002 23:38:14 +0000
parents 5cbcfde3ad55
children ac487a7f7f2c
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1
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2 /* Support for dynamic loading of extension modules */
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3
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4 #include "Python.h"
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5 #include "importdl.h"
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6
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7 #include <sys/types.h>
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8 #include <sys/stat.h>
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9
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10 #if defined(__NetBSD__)
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11 #include <sys/param.h>
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12 #if (NetBSD < 199712)
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13 #include <nlist.h>
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14 #include <link.h>
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15 #define dlerror() "error in dynamic linking"
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16 #endif
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17 #endif /* NetBSD */
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19 #ifdef HAVE_DLFCN_H
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20 #include <dlfcn.h>
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21 #else
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22 #if defined(PYOS_OS2) && defined(PYCC_GCC)
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23 #include "dlfcn.h"
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24 #endif
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25 #endif
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26
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27 #if (defined(__OpenBSD__) || defined(__NetBSD__)) && !defined(__ELF__)
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28 #define LEAD_UNDERSCORE "_"
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29 #else
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30 #define LEAD_UNDERSCORE ""
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31 #endif
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33
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34 const struct filedescr _PyImport_DynLoadFiletab[] = {
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35 #ifdef __CYGWIN__
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36 {".dll", "rb", C_EXTENSION},
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37 {"module.dll", "rb", C_EXTENSION},
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38 #else
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39 #if defined(PYOS_OS2) && defined(PYCC_GCC)
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40 {".pyd", "rb", C_EXTENSION},
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41 {".dll", "rb", C_EXTENSION},
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42 #else
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43 {".so", "rb", C_EXTENSION},
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44 {"module.so", "rb", C_EXTENSION},
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45 #endif
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46 #endif
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47 {0, 0}
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48 };
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49
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50 static struct {
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51 dev_t dev;
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52 ino_t ino;
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53 void *handle;
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54 } handles[128];
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55 static int nhandles = 0;
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56
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57
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58 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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59 const char *pathname, FILE *fp)
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60 {
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61 dl_funcptr p;
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62 void *handle;
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63 char funcname[258];
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64 char pathbuf[260];
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65 int dlopenflags=0;
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66
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67 if (strchr(pathname, '/') == NULL) {
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68 /* Prefix bare filename with "./" */
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69 PyOS_snprintf(pathbuf, sizeof(pathbuf), "./%-.255s", pathname);
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70 pathname = pathbuf;
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71 }
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72
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73 PyOS_snprintf(funcname, sizeof(funcname),
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74 LEAD_UNDERSCORE "init%.200s", shortname);
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75
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76 if (fp != NULL) {
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77 int i;
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78 struct stat statb;
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79 fstat(fileno(fp), &statb);
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80 for (i = 0; i < nhandles; i++) {
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81 if (statb.st_dev == handles[i].dev &&
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82 statb.st_ino == handles[i].ino) {
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83 p = (dl_funcptr) dlsym(handles[i].handle,
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84 funcname);
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85 return p;
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86 }
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87 }
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88 if (nhandles < 128) {
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89 handles[nhandles].dev = statb.st_dev;
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90 handles[nhandles].ino = statb.st_ino;
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91 }
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92 }
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93
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94 #if !(defined(PYOS_OS2) && defined(PYCC_GCC))
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95 dlopenflags = PyThreadState_Get()->interp->dlopenflags;
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96 #endif
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97
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98 if (Py_VerboseFlag)
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99 printf("dlopen(\"%s\", %x);\n", pathname, dlopenflags);
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100
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101 handle = dlopen(pathname, dlopenflags);
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102
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103 if (handle == NULL) {
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104 PyErr_SetString(PyExc_ImportError, dlerror());
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105 return NULL;
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106 }
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107 if (fp != NULL && nhandles < 128)
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108 handles[nhandles++].handle = handle;
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109 p = (dl_funcptr) dlsym(handle, funcname);
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110 return p;
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111 }