Mercurial > cpython-lru_cache-weakref
annotate Modules/dlmodule.c @ 4566:6403c94de50d legacy-trunk
Added safeguard against failure in __del__.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Wed, 27 Nov 1996 19:39:58 +0000 |
| parents | 65d2d8e67da3 |
| children | 8669edb1d9c5 |
| rev | line source |
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| 1650 | 1 /*********************************************************** |
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
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3 The Netherlands. |
| 1650 | 4 |
| 5 All Rights Reserved | |
| 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, |
| 1650 | 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 |
| 1650 | 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. |
| 1650 | 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. |
| 1650 | 29 |
| 30 ******************************************************************/ | |
| 31 | |
| 32 /* dl module */ | |
| 33 | |
| 34 #include "allobjects.h" | |
| 35 #include "modsupport.h" | |
| 36 | |
| 37 #include <dlfcn.h> | |
| 38 | |
| 39 #ifndef RTLD_LAZY | |
| 40 #define RTLD_LAZY 1 | |
| 41 #endif | |
| 42 | |
| 43 typedef struct { | |
| 44 OB_HEAD | |
| 45 ANY *dl_handle; | |
| 46 } dlobject; | |
| 47 | |
| 48 staticforward typeobject Dltype; | |
| 49 | |
| 50 static object *Dlerror; | |
| 51 | |
| 52 static object * | |
| 53 newdlobject(handle) | |
| 54 ANY *handle; | |
| 55 { | |
| 56 dlobject *xp; | |
| 57 xp = NEWOBJ(dlobject, &Dltype); | |
| 58 if (xp == NULL) | |
| 59 return NULL; | |
| 60 xp->dl_handle = handle; | |
| 61 return (object *)xp; | |
| 62 } | |
| 63 | |
| 64 static void | |
| 65 dl_dealloc(xp) | |
| 66 dlobject *xp; | |
| 67 { | |
| 68 if (xp->dl_handle != NULL) | |
| 69 dlclose(xp->dl_handle); | |
| 70 DEL(xp); | |
| 71 } | |
| 72 | |
| 73 static object * | |
| 74 dl_close(xp, args) | |
| 75 dlobject *xp; | |
| 76 object *args; | |
| 77 { | |
| 78 if (!getargs(args, "")) | |
| 79 return NULL; | |
| 80 if (xp->dl_handle != NULL) { | |
| 81 dlclose(xp->dl_handle); | |
| 82 xp->dl_handle = NULL; | |
| 83 } | |
| 84 INCREF(None); | |
| 85 return None; | |
| 86 } | |
| 87 | |
| 88 static object * | |
| 89 dl_sym(xp, args) | |
| 90 dlobject *xp; | |
| 91 object *args; | |
| 92 { | |
| 93 char *name; | |
| 94 ANY *func; | |
| 95 if (!getargs(args, "s", &name)) | |
| 96 return NULL; | |
| 97 func = dlsym(xp->dl_handle, name); | |
| 98 if (func == NULL) { | |
| 99 INCREF(None); | |
| 100 return None; | |
| 101 } | |
| 102 return newintobject((long)func); | |
| 103 } | |
| 104 | |
| 105 static object * | |
| 106 dl_call(xp, args) | |
| 107 dlobject *xp; | |
| 108 object *args; /* (varargs) */ | |
| 109 { | |
| 110 object *name; | |
| 111 long (*func)(); | |
| 112 long alist[10]; | |
| 113 long res; | |
| 114 int i; | |
| 115 int n = gettuplesize(args); | |
| 116 if (n < 1) { | |
| 117 err_setstr(TypeError, "at least a name is needed"); | |
| 118 return NULL; | |
| 119 } | |
| 120 name = gettupleitem(args, 0); | |
| 121 if (!is_stringobject(name)) { | |
| 122 err_setstr(TypeError, "function name must be a string"); | |
| 123 return NULL; | |
| 124 } | |
| 125 func = dlsym(xp->dl_handle, getstringvalue(name)); | |
| 126 if (func == NULL) { | |
| 127 err_setstr(ValueError, dlerror()); | |
| 128 return NULL; | |
| 129 } | |
| 130 if (n-1 > 10) { | |
| 131 err_setstr(TypeError, "too many arguments (max 10)"); | |
| 132 return NULL; | |
| 133 } | |
| 134 for (i = 1; i < n; i++) { | |
| 135 object *v = gettupleitem(args, i); | |
| 136 if (is_intobject(v)) | |
| 137 alist[i-1] = getintvalue(v); | |
| 138 else if (is_stringobject(v)) | |
| 139 alist[i-1] = (long)getstringvalue(v); | |
| 140 else if (v == None) | |
| 141 alist[i-1] = (long) ((char *)NULL); | |
| 142 else { | |
| 143 err_setstr(TypeError, | |
| 144 "arguments must be int, string or None"); | |
| 145 return NULL; | |
| 146 } | |
| 147 } | |
| 148 for (; i <= 10; i++) | |
| 149 alist[i-1] = 0; | |
| 150 res = (*func)(alist[0], alist[1], alist[2], alist[3], alist[4], | |
| 151 alist[5], alist[6], alist[7], alist[8], alist[9]); | |
| 152 return newintobject(res); | |
| 153 } | |
| 154 | |
| 155 static struct methodlist dlobject_methods[] = { | |
| 156 {"call", (method)dl_call, 1 /* varargs */}, | |
| 157 {"sym", (method)dl_sym}, | |
| 158 {"close", (method)dl_close}, | |
| 159 {NULL, NULL} /* Sentinel */ | |
| 160 }; | |
| 161 | |
| 162 static object * | |
| 163 dl_getattr(xp, name) | |
| 164 dlobject *xp; | |
| 165 char *name; | |
| 166 { | |
| 167 return findmethod(dlobject_methods, (object *)xp, name); | |
| 168 } | |
| 169 | |
| 170 | |
| 171 static typeobject Dltype = { | |
| 172 OB_HEAD_INIT(&Typetype) | |
| 173 0, /*ob_size*/ | |
| 174 "dl", /*tp_name*/ | |
| 175 sizeof(dlobject), /*tp_basicsize*/ | |
| 176 0, /*tp_itemsize*/ | |
| 177 /* methods */ | |
| 178 (destructor)dl_dealloc, /*tp_dealloc*/ | |
| 179 0, /*tp_print*/ | |
| 180 (getattrfunc)dl_getattr,/*tp_getattr*/ | |
| 181 0, /*tp_setattr*/ | |
| 182 0, /*tp_compare*/ | |
| 183 0, /*tp_repr*/ | |
| 184 0, /*tp_as_number*/ | |
| 185 0, /*tp_as_sequence*/ | |
| 186 0, /*tp_as_mapping*/ | |
| 187 0, /*tp_hash*/ | |
| 188 }; | |
| 189 | |
| 190 static object * | |
| 191 dl_open(self, args) | |
| 192 object *self; | |
| 193 object *args; | |
| 194 { | |
| 195 char *name; | |
| 196 int mode; | |
| 197 ANY *handle; | |
| 198 if (getargs(args, "z", &name)) | |
| 199 mode = RTLD_LAZY; | |
| 200 else { | |
| 201 err_clear(); | |
| 202 if (!getargs(args, "(zi)", &name, &mode)) | |
| 203 return NULL; | |
| 204 #ifndef RTLD_NOW | |
| 205 if (mode != RTLD_LAZY) { | |
| 206 err_setstr(ValueError, "mode must be 1"); | |
| 207 return NULL; | |
| 208 } | |
| 209 #endif | |
| 210 } | |
| 211 handle = dlopen(name, mode); | |
| 212 if (handle == NULL) { | |
| 213 err_setstr(Dlerror, dlerror()); | |
| 214 return NULL; | |
| 215 } | |
| 216 return newdlobject(handle); | |
| 217 } | |
| 218 | |
| 219 static struct methodlist dl_methods[] = { | |
| 220 {"open", dl_open}, | |
| 221 {NULL, NULL} /* sentinel */ | |
| 222 }; | |
| 223 | |
| 224 void | |
| 225 initdl() | |
| 226 { | |
| 227 object *m, *d, *x; | |
| 228 | |
| 229 if (sizeof(int) != sizeof(long) || | |
| 230 sizeof(long) != sizeof(char *)) | |
| 231 fatal( | |
| 232 "module dl requires sizeof(int) == sizeof(long) == sizeof(char*)"); | |
| 233 | |
| 234 /* Create the module and add the functions */ | |
| 235 m = initmodule("dl", dl_methods); | |
| 236 | |
| 237 /* Add some symbolic constants to the module */ | |
| 238 d = getmoduledict(m); | |
| 239 Dlerror = x = newstringobject("dl.error"); | |
| 240 dictinsert(d, "error", x); | |
| 241 x = newintobject((long)RTLD_LAZY); | |
| 242 dictinsert(d, "RTLD_LAZY", x); | |
| 243 #ifdef RTLD_NOW | |
| 244 x = newintobject((long)RTLD_NOW); | |
| 245 dictinsert(d, "RTLD_NOW", x); | |
| 246 #endif | |
| 247 | |
| 248 /* Check for errors */ | |
| 249 if (err_occurred()) | |
| 250 fatal("can't initialize module dl"); | |
| 251 } |