| 1 |
/* $Header$ */ |
| 2 |
/* |
| 3 |
* tclLoad.c -- |
| 4 |
* |
| 5 |
* This file provides the generic portion (those that are the same |
| 6 |
* on all platforms) of Tcl's dynamic loading facilities. |
| 7 |
* |
| 8 |
* Copyright (c) 1995-1997 Sun Microsystems, Inc. |
| 9 |
* |
| 10 |
* See the file "license.terms" for information on usage and redistribution |
| 11 |
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 12 |
* |
| 13 |
* RCS: @(#) $Id: tclload.c,v 1.1.1.1 2001/06/13 04:42:55 dtashley Exp $ |
| 14 |
*/ |
| 15 |
|
| 16 |
#include "tclInt.h" |
| 17 |
|
| 18 |
/* |
| 19 |
* The following structure describes a package that has been loaded |
| 20 |
* either dynamically (with the "load" command) or statically (as |
| 21 |
* indicated by a call to TclGetLoadedPackages). All such packages |
| 22 |
* are linked together into a single list for the process. Packages |
| 23 |
* are never unloaded, so these structures are never freed. |
| 24 |
*/ |
| 25 |
|
| 26 |
typedef struct LoadedPackage { |
| 27 |
char *fileName; /* Name of the file from which the |
| 28 |
* package was loaded. An empty string |
| 29 |
* means the package is loaded statically. |
| 30 |
* Malloc-ed. */ |
| 31 |
char *packageName; /* Name of package prefix for the package, |
| 32 |
* properly capitalized (first letter UC, |
| 33 |
* others LC), no "_", as in "Net". |
| 34 |
* Malloc-ed. */ |
| 35 |
ClientData clientData; /* Token for the loaded file which should be |
| 36 |
* passed to TclpUnloadFile() when the file |
| 37 |
* is no longer needed. If fileName is NULL, |
| 38 |
* then this field is irrelevant. */ |
| 39 |
Tcl_PackageInitProc *initProc; |
| 40 |
/* Initialization procedure to call to |
| 41 |
* incorporate this package into a trusted |
| 42 |
* interpreter. */ |
| 43 |
Tcl_PackageInitProc *safeInitProc; |
| 44 |
/* Initialization procedure to call to |
| 45 |
* incorporate this package into a safe |
| 46 |
* interpreter (one that will execute |
| 47 |
* untrusted scripts). NULL means the |
| 48 |
* package can't be used in unsafe |
| 49 |
* interpreters. */ |
| 50 |
struct LoadedPackage *nextPtr; |
| 51 |
/* Next in list of all packages loaded into |
| 52 |
* this application process. NULL means |
| 53 |
* end of list. */ |
| 54 |
} LoadedPackage; |
| 55 |
|
| 56 |
/* |
| 57 |
* TCL_THREADS |
| 58 |
* There is a global list of packages that is anchored at firstPackagePtr. |
| 59 |
* Access to this list is governed by a mutex. |
| 60 |
*/ |
| 61 |
|
| 62 |
static LoadedPackage *firstPackagePtr = NULL; |
| 63 |
/* First in list of all packages loaded into |
| 64 |
* this process. */ |
| 65 |
|
| 66 |
TCL_DECLARE_MUTEX(packageMutex) |
| 67 |
|
| 68 |
/* |
| 69 |
* The following structure represents a particular package that has |
| 70 |
* been incorporated into a particular interpreter (by calling its |
| 71 |
* initialization procedure). There is a list of these structures for |
| 72 |
* each interpreter, with an AssocData value (key "load") for the |
| 73 |
* interpreter that points to the first package (if any). |
| 74 |
*/ |
| 75 |
|
| 76 |
typedef struct InterpPackage { |
| 77 |
LoadedPackage *pkgPtr; /* Points to detailed information about |
| 78 |
* package. */ |
| 79 |
struct InterpPackage *nextPtr; |
| 80 |
/* Next package in this interpreter, or |
| 81 |
* NULL for end of list. */ |
| 82 |
} InterpPackage; |
| 83 |
|
| 84 |
/* |
| 85 |
* Prototypes for procedures that are private to this file: |
| 86 |
*/ |
| 87 |
|
| 88 |
static void LoadCleanupProc _ANSI_ARGS_((ClientData clientData, |
| 89 |
Tcl_Interp *interp)); |
| 90 |
|
| 91 |
/* |
| 92 |
*---------------------------------------------------------------------- |
| 93 |
* |
| 94 |
* Tcl_LoadObjCmd -- |
| 95 |
* |
| 96 |
* This procedure is invoked to process the "load" Tcl command. |
| 97 |
* See the user documentation for details on what it does. |
| 98 |
* |
| 99 |
* Results: |
| 100 |
* A standard Tcl result. |
| 101 |
* |
| 102 |
* Side effects: |
| 103 |
* See the user documentation. |
| 104 |
* |
| 105 |
*---------------------------------------------------------------------- |
| 106 |
*/ |
| 107 |
|
| 108 |
int |
| 109 |
Tcl_LoadObjCmd(dummy, interp, objc, objv) |
| 110 |
ClientData dummy; /* Not used. */ |
| 111 |
Tcl_Interp *interp; /* Current interpreter. */ |
| 112 |
int objc; /* Number of arguments. */ |
| 113 |
Tcl_Obj *CONST objv[]; /* Argument objects. */ |
| 114 |
{ |
| 115 |
Tcl_Interp *target; |
| 116 |
LoadedPackage *pkgPtr, *defaultPtr; |
| 117 |
Tcl_DString pkgName, tmp, initName, safeInitName, fileName; |
| 118 |
Tcl_PackageInitProc *initProc, *safeInitProc; |
| 119 |
InterpPackage *ipFirstPtr, *ipPtr; |
| 120 |
int code, namesMatch, filesMatch; |
| 121 |
char *p, *tempString, *fullFileName, *packageName; |
| 122 |
ClientData clientData; |
| 123 |
Tcl_UniChar ch; |
| 124 |
int offset; |
| 125 |
|
| 126 |
if ((objc < 2) || (objc > 4)) { |
| 127 |
Tcl_WrongNumArgs(interp, 1, objv, "fileName ?packageName? ?interp?"); |
| 128 |
return TCL_ERROR; |
| 129 |
} |
| 130 |
tempString = Tcl_GetString(objv[1]); |
| 131 |
fullFileName = Tcl_TranslateFileName(interp, tempString, &fileName); |
| 132 |
if (fullFileName == NULL) { |
| 133 |
return TCL_ERROR; |
| 134 |
} |
| 135 |
Tcl_DStringInit(&pkgName); |
| 136 |
Tcl_DStringInit(&initName); |
| 137 |
Tcl_DStringInit(&safeInitName); |
| 138 |
Tcl_DStringInit(&tmp); |
| 139 |
|
| 140 |
packageName = NULL; |
| 141 |
if (objc >= 3) { |
| 142 |
packageName = Tcl_GetString(objv[2]); |
| 143 |
if (packageName[0] == '\0') { |
| 144 |
packageName = NULL; |
| 145 |
} |
| 146 |
} |
| 147 |
if ((fullFileName[0] == 0) && (packageName == NULL)) { |
| 148 |
Tcl_SetResult(interp, |
| 149 |
"must specify either file name or package name", |
| 150 |
TCL_STATIC); |
| 151 |
code = TCL_ERROR; |
| 152 |
goto done; |
| 153 |
} |
| 154 |
|
| 155 |
/* |
| 156 |
* Figure out which interpreter we're going to load the package into. |
| 157 |
*/ |
| 158 |
|
| 159 |
target = interp; |
| 160 |
if (objc == 4) { |
| 161 |
char *slaveIntName; |
| 162 |
slaveIntName = Tcl_GetString(objv[3]); |
| 163 |
target = Tcl_GetSlave(interp, slaveIntName); |
| 164 |
if (target == NULL) { |
| 165 |
return TCL_ERROR; |
| 166 |
} |
| 167 |
} |
| 168 |
|
| 169 |
/* |
| 170 |
* Scan through the packages that are currently loaded to see if the |
| 171 |
* package we want is already loaded. We'll use a loaded package if |
| 172 |
* it meets any of the following conditions: |
| 173 |
* - Its name and file match the once we're looking for. |
| 174 |
* - Its file matches, and we weren't given a name. |
| 175 |
* - Its name matches, the file name was specified as empty, and there |
| 176 |
* is only no statically loaded package with the same name. |
| 177 |
*/ |
| 178 |
Tcl_MutexLock(&packageMutex); |
| 179 |
|
| 180 |
defaultPtr = NULL; |
| 181 |
for (pkgPtr = firstPackagePtr; pkgPtr != NULL; pkgPtr = pkgPtr->nextPtr) { |
| 182 |
if (packageName == NULL) { |
| 183 |
namesMatch = 0; |
| 184 |
} else { |
| 185 |
Tcl_DStringSetLength(&pkgName, 0); |
| 186 |
Tcl_DStringAppend(&pkgName, packageName, -1); |
| 187 |
Tcl_DStringSetLength(&tmp, 0); |
| 188 |
Tcl_DStringAppend(&tmp, pkgPtr->packageName, -1); |
| 189 |
Tcl_UtfToLower(Tcl_DStringValue(&pkgName)); |
| 190 |
Tcl_UtfToLower(Tcl_DStringValue(&tmp)); |
| 191 |
if (strcmp(Tcl_DStringValue(&tmp), |
| 192 |
Tcl_DStringValue(&pkgName)) == 0) { |
| 193 |
namesMatch = 1; |
| 194 |
} else { |
| 195 |
namesMatch = 0; |
| 196 |
} |
| 197 |
} |
| 198 |
Tcl_DStringSetLength(&pkgName, 0); |
| 199 |
|
| 200 |
filesMatch = (strcmp(pkgPtr->fileName, fullFileName) == 0); |
| 201 |
if (filesMatch && (namesMatch || (packageName == NULL))) { |
| 202 |
break; |
| 203 |
} |
| 204 |
if (namesMatch && (fullFileName[0] == 0)) { |
| 205 |
defaultPtr = pkgPtr; |
| 206 |
} |
| 207 |
if (filesMatch && !namesMatch && (fullFileName[0] != 0)) { |
| 208 |
/* |
| 209 |
* Can't have two different packages loaded from the same |
| 210 |
* file. |
| 211 |
*/ |
| 212 |
|
| 213 |
Tcl_AppendResult(interp, "file \"", fullFileName, |
| 214 |
"\" is already loaded for package \"", |
| 215 |
pkgPtr->packageName, "\"", (char *) NULL); |
| 216 |
code = TCL_ERROR; |
| 217 |
Tcl_MutexUnlock(&packageMutex); |
| 218 |
goto done; |
| 219 |
} |
| 220 |
} |
| 221 |
Tcl_MutexUnlock(&packageMutex); |
| 222 |
if (pkgPtr == NULL) { |
| 223 |
pkgPtr = defaultPtr; |
| 224 |
} |
| 225 |
|
| 226 |
/* |
| 227 |
* Scan through the list of packages already loaded in the target |
| 228 |
* interpreter. If the package we want is already loaded there, |
| 229 |
* then there's nothing for us to to. |
| 230 |
*/ |
| 231 |
|
| 232 |
if (pkgPtr != NULL) { |
| 233 |
ipFirstPtr = (InterpPackage *) Tcl_GetAssocData(target, "tclLoad", |
| 234 |
(Tcl_InterpDeleteProc **) NULL); |
| 235 |
for (ipPtr = ipFirstPtr; ipPtr != NULL; ipPtr = ipPtr->nextPtr) { |
| 236 |
if (ipPtr->pkgPtr == pkgPtr) { |
| 237 |
code = TCL_OK; |
| 238 |
goto done; |
| 239 |
} |
| 240 |
} |
| 241 |
} |
| 242 |
|
| 243 |
if (pkgPtr == NULL) { |
| 244 |
/* |
| 245 |
* The desired file isn't currently loaded, so load it. It's an |
| 246 |
* error if the desired package is a static one. |
| 247 |
*/ |
| 248 |
|
| 249 |
if (fullFileName[0] == 0) { |
| 250 |
Tcl_AppendResult(interp, "package \"", packageName, |
| 251 |
"\" isn't loaded statically", (char *) NULL); |
| 252 |
code = TCL_ERROR; |
| 253 |
goto done; |
| 254 |
} |
| 255 |
|
| 256 |
/* |
| 257 |
* Figure out the module name if it wasn't provided explicitly. |
| 258 |
*/ |
| 259 |
|
| 260 |
if (packageName != NULL) { |
| 261 |
Tcl_DStringAppend(&pkgName, packageName, -1); |
| 262 |
} else { |
| 263 |
int retc; |
| 264 |
/* |
| 265 |
* Threading note - this call used to be protected by a mutex. |
| 266 |
*/ |
| 267 |
retc = TclGuessPackageName(fullFileName, &pkgName); |
| 268 |
if (!retc) { |
| 269 |
int pargc; |
| 270 |
char **pargv, *pkgGuess; |
| 271 |
|
| 272 |
/* |
| 273 |
* The platform-specific code couldn't figure out the |
| 274 |
* module name. Make a guess by taking the last element |
| 275 |
* of the file name, stripping off any leading "lib", |
| 276 |
* and then using all of the alphabetic and underline |
| 277 |
* characters that follow that. |
| 278 |
*/ |
| 279 |
|
| 280 |
Tcl_SplitPath(fullFileName, &pargc, &pargv); |
| 281 |
pkgGuess = pargv[pargc-1]; |
| 282 |
if ((pkgGuess[0] == 'l') && (pkgGuess[1] == 'i') |
| 283 |
&& (pkgGuess[2] == 'b')) { |
| 284 |
pkgGuess += 3; |
| 285 |
} |
| 286 |
for (p = pkgGuess; *p != 0; p += offset) { |
| 287 |
offset = Tcl_UtfToUniChar(p, &ch); |
| 288 |
if ((ch > 0x100) |
| 289 |
|| !(isalpha(UCHAR(ch)) /* INTL: ISO only */ |
| 290 |
|| (UCHAR(ch) == '_'))) { |
| 291 |
break; |
| 292 |
} |
| 293 |
} |
| 294 |
if (p == pkgGuess) { |
| 295 |
ckfree((char *)pargv); |
| 296 |
Tcl_AppendResult(interp, |
| 297 |
"couldn't figure out package name for ", |
| 298 |
fullFileName, (char *) NULL); |
| 299 |
code = TCL_ERROR; |
| 300 |
goto done; |
| 301 |
} |
| 302 |
Tcl_DStringAppend(&pkgName, pkgGuess, (p - pkgGuess)); |
| 303 |
ckfree((char *)pargv); |
| 304 |
} |
| 305 |
} |
| 306 |
|
| 307 |
/* |
| 308 |
* Fix the capitalization in the package name so that the first |
| 309 |
* character is in caps (or title case) but the others are all |
| 310 |
* lower-case. |
| 311 |
*/ |
| 312 |
|
| 313 |
Tcl_DStringSetLength(&pkgName, |
| 314 |
Tcl_UtfToTitle(Tcl_DStringValue(&pkgName))); |
| 315 |
|
| 316 |
/* |
| 317 |
* Compute the names of the two initialization procedures, |
| 318 |
* based on the package name. |
| 319 |
*/ |
| 320 |
|
| 321 |
Tcl_DStringAppend(&initName, Tcl_DStringValue(&pkgName), -1); |
| 322 |
Tcl_DStringAppend(&initName, "_Init", 5); |
| 323 |
Tcl_DStringAppend(&safeInitName, Tcl_DStringValue(&pkgName), -1); |
| 324 |
Tcl_DStringAppend(&safeInitName, "_SafeInit", 9); |
| 325 |
|
| 326 |
/* |
| 327 |
* Call platform-specific code to load the package and find the |
| 328 |
* two initialization procedures. |
| 329 |
*/ |
| 330 |
|
| 331 |
Tcl_MutexLock(&packageMutex); |
| 332 |
code = TclpLoadFile(interp, fullFileName, Tcl_DStringValue(&initName), |
| 333 |
Tcl_DStringValue(&safeInitName), &initProc, &safeInitProc, |
| 334 |
&clientData); |
| 335 |
Tcl_MutexUnlock(&packageMutex); |
| 336 |
if (code != TCL_OK) { |
| 337 |
goto done; |
| 338 |
} |
| 339 |
if (initProc == NULL) { |
| 340 |
Tcl_AppendResult(interp, "couldn't find procedure ", |
| 341 |
Tcl_DStringValue(&initName), (char *) NULL); |
| 342 |
TclpUnloadFile(clientData); |
| 343 |
code = TCL_ERROR; |
| 344 |
goto done; |
| 345 |
} |
| 346 |
|
| 347 |
/* |
| 348 |
* Create a new record to describe this package. |
| 349 |
*/ |
| 350 |
|
| 351 |
pkgPtr = (LoadedPackage *) ckalloc(sizeof(LoadedPackage)); |
| 352 |
pkgPtr->fileName = (char *) ckalloc((unsigned) |
| 353 |
(strlen(fullFileName) + 1)); |
| 354 |
strcpy(pkgPtr->fileName, fullFileName); |
| 355 |
pkgPtr->packageName = (char *) ckalloc((unsigned) |
| 356 |
(Tcl_DStringLength(&pkgName) + 1)); |
| 357 |
strcpy(pkgPtr->packageName, Tcl_DStringValue(&pkgName)); |
| 358 |
pkgPtr->clientData = clientData; |
| 359 |
pkgPtr->initProc = initProc; |
| 360 |
pkgPtr->safeInitProc = safeInitProc; |
| 361 |
Tcl_MutexLock(&packageMutex); |
| 362 |
pkgPtr->nextPtr = firstPackagePtr; |
| 363 |
firstPackagePtr = pkgPtr; |
| 364 |
Tcl_MutexUnlock(&packageMutex); |
| 365 |
} |
| 366 |
|
| 367 |
/* |
| 368 |
* Invoke the package's initialization procedure (either the |
| 369 |
* normal one or the safe one, depending on whether or not the |
| 370 |
* interpreter is safe). |
| 371 |
*/ |
| 372 |
|
| 373 |
if (Tcl_IsSafe(target)) { |
| 374 |
if (pkgPtr->safeInitProc != NULL) { |
| 375 |
code = (*pkgPtr->safeInitProc)(target); |
| 376 |
} else { |
| 377 |
Tcl_AppendResult(interp, |
| 378 |
"can't use package in a safe interpreter: ", |
| 379 |
"no ", pkgPtr->packageName, "_SafeInit procedure", |
| 380 |
(char *) NULL); |
| 381 |
code = TCL_ERROR; |
| 382 |
goto done; |
| 383 |
} |
| 384 |
} else { |
| 385 |
code = (*pkgPtr->initProc)(target); |
| 386 |
} |
| 387 |
|
| 388 |
/* |
| 389 |
* Record the fact that the package has been loaded in the |
| 390 |
* target interpreter. |
| 391 |
*/ |
| 392 |
|
| 393 |
if (code == TCL_OK) { |
| 394 |
/* |
| 395 |
* Refetch ipFirstPtr: loading the package may have introduced |
| 396 |
* additional static packages at the head of the linked list! |
| 397 |
*/ |
| 398 |
|
| 399 |
ipFirstPtr = (InterpPackage *) Tcl_GetAssocData(target, "tclLoad", |
| 400 |
(Tcl_InterpDeleteProc **) NULL); |
| 401 |
ipPtr = (InterpPackage *) ckalloc(sizeof(InterpPackage)); |
| 402 |
ipPtr->pkgPtr = pkgPtr; |
| 403 |
ipPtr->nextPtr = ipFirstPtr; |
| 404 |
Tcl_SetAssocData(target, "tclLoad", LoadCleanupProc, |
| 405 |
(ClientData) ipPtr); |
| 406 |
} else { |
| 407 |
TclTransferResult(target, code, interp); |
| 408 |
} |
| 409 |
|
| 410 |
done: |
| 411 |
Tcl_DStringFree(&pkgName); |
| 412 |
Tcl_DStringFree(&initName); |
| 413 |
Tcl_DStringFree(&safeInitName); |
| 414 |
Tcl_DStringFree(&fileName); |
| 415 |
Tcl_DStringFree(&tmp); |
| 416 |
return code; |
| 417 |
} |
| 418 |
|
| 419 |
/* |
| 420 |
*---------------------------------------------------------------------- |
| 421 |
* |
| 422 |
* Tcl_StaticPackage -- |
| 423 |
* |
| 424 |
* This procedure is invoked to indicate that a particular |
| 425 |
* package has been linked statically with an application. |
| 426 |
* |
| 427 |
* Results: |
| 428 |
* None. |
| 429 |
* |
| 430 |
* Side effects: |
| 431 |
* Once this procedure completes, the package becomes loadable |
| 432 |
* via the "load" command with an empty file name. |
| 433 |
* |
| 434 |
*---------------------------------------------------------------------- |
| 435 |
*/ |
| 436 |
|
| 437 |
void |
| 438 |
Tcl_StaticPackage(interp, pkgName, initProc, safeInitProc) |
| 439 |
Tcl_Interp *interp; /* If not NULL, it means that the |
| 440 |
* package has already been loaded |
| 441 |
* into the given interpreter by |
| 442 |
* calling the appropriate init proc. */ |
| 443 |
char *pkgName; /* Name of package (must be properly |
| 444 |
* capitalized: first letter upper |
| 445 |
* case, others lower case). */ |
| 446 |
Tcl_PackageInitProc *initProc; /* Procedure to call to incorporate |
| 447 |
* this package into a trusted |
| 448 |
* interpreter. */ |
| 449 |
Tcl_PackageInitProc *safeInitProc; /* Procedure to call to incorporate |
| 450 |
* this package into a safe interpreter |
| 451 |
* (one that will execute untrusted |
| 452 |
* scripts). NULL means the package |
| 453 |
* can't be used in safe |
| 454 |
* interpreters. */ |
| 455 |
{ |
| 456 |
LoadedPackage *pkgPtr; |
| 457 |
InterpPackage *ipPtr, *ipFirstPtr; |
| 458 |
|
| 459 |
/* |
| 460 |
* Check to see if someone else has already reported this package as |
| 461 |
* statically loaded. If this call is redundant then just return. |
| 462 |
*/ |
| 463 |
|
| 464 |
Tcl_MutexLock(&packageMutex); |
| 465 |
for (pkgPtr = firstPackagePtr; pkgPtr != NULL; pkgPtr = pkgPtr->nextPtr) { |
| 466 |
if ((pkgPtr->initProc == initProc) |
| 467 |
&& (pkgPtr->safeInitProc == safeInitProc) |
| 468 |
&& (strcmp(pkgPtr->packageName, pkgName) == 0)) { |
| 469 |
Tcl_MutexUnlock(&packageMutex); |
| 470 |
return; |
| 471 |
} |
| 472 |
} |
| 473 |
|
| 474 |
Tcl_MutexUnlock(&packageMutex); |
| 475 |
|
| 476 |
pkgPtr = (LoadedPackage *) ckalloc(sizeof(LoadedPackage)); |
| 477 |
pkgPtr->fileName = (char *) ckalloc((unsigned) 1); |
| 478 |
pkgPtr->fileName[0] = 0; |
| 479 |
pkgPtr->packageName = (char *) ckalloc((unsigned) |
| 480 |
(strlen(pkgName) + 1)); |
| 481 |
strcpy(pkgPtr->packageName, pkgName); |
| 482 |
pkgPtr->clientData = NULL; |
| 483 |
pkgPtr->initProc = initProc; |
| 484 |
pkgPtr->safeInitProc = safeInitProc; |
| 485 |
Tcl_MutexLock(&packageMutex); |
| 486 |
pkgPtr->nextPtr = firstPackagePtr; |
| 487 |
firstPackagePtr = pkgPtr; |
| 488 |
Tcl_MutexUnlock(&packageMutex); |
| 489 |
|
| 490 |
if (interp != NULL) { |
| 491 |
ipFirstPtr = (InterpPackage *) Tcl_GetAssocData(interp, "tclLoad", |
| 492 |
(Tcl_InterpDeleteProc **) NULL); |
| 493 |
ipPtr = (InterpPackage *) ckalloc(sizeof(InterpPackage)); |
| 494 |
ipPtr->pkgPtr = pkgPtr; |
| 495 |
ipPtr->nextPtr = ipFirstPtr; |
| 496 |
Tcl_SetAssocData(interp, "tclLoad", LoadCleanupProc, |
| 497 |
(ClientData) ipPtr); |
| 498 |
} |
| 499 |
} |
| 500 |
|
| 501 |
/* |
| 502 |
*---------------------------------------------------------------------- |
| 503 |
* |
| 504 |
* TclGetLoadedPackages -- |
| 505 |
* |
| 506 |
* This procedure returns information about all of the files |
| 507 |
* that are loaded (either in a particular intepreter, or |
| 508 |
* for all interpreters). |
| 509 |
* |
| 510 |
* Results: |
| 511 |
* The return value is a standard Tcl completion code. If |
| 512 |
* successful, a list of lists is placed in the interp's result. |
| 513 |
* Each sublist corresponds to one loaded file; its first |
| 514 |
* element is the name of the file (or an empty string for |
| 515 |
* something that's statically loaded) and the second element |
| 516 |
* is the name of the package in that file. |
| 517 |
* |
| 518 |
* Side effects: |
| 519 |
* None. |
| 520 |
* |
| 521 |
*---------------------------------------------------------------------- |
| 522 |
*/ |
| 523 |
|
| 524 |
int |
| 525 |
TclGetLoadedPackages(interp, targetName) |
| 526 |
Tcl_Interp *interp; /* Interpreter in which to return |
| 527 |
* information or error message. */ |
| 528 |
char *targetName; /* Name of target interpreter or NULL. |
| 529 |
* If NULL, return info about all interps; |
| 530 |
* otherwise, just return info about this |
| 531 |
* interpreter. */ |
| 532 |
{ |
| 533 |
Tcl_Interp *target; |
| 534 |
LoadedPackage *pkgPtr; |
| 535 |
InterpPackage *ipPtr; |
| 536 |
char *prefix; |
| 537 |
|
| 538 |
if (targetName == NULL) { |
| 539 |
/* |
| 540 |
* Return information about all of the available packages. |
| 541 |
*/ |
| 542 |
|
| 543 |
prefix = "{"; |
| 544 |
Tcl_MutexLock(&packageMutex); |
| 545 |
for (pkgPtr = firstPackagePtr; pkgPtr != NULL; |
| 546 |
pkgPtr = pkgPtr->nextPtr) { |
| 547 |
Tcl_AppendResult(interp, prefix, (char *) NULL); |
| 548 |
Tcl_AppendElement(interp, pkgPtr->fileName); |
| 549 |
Tcl_AppendElement(interp, pkgPtr->packageName); |
| 550 |
Tcl_AppendResult(interp, "}", (char *) NULL); |
| 551 |
prefix = " {"; |
| 552 |
} |
| 553 |
Tcl_MutexUnlock(&packageMutex); |
| 554 |
return TCL_OK; |
| 555 |
} |
| 556 |
|
| 557 |
/* |
| 558 |
* Return information about only the packages that are loaded in |
| 559 |
* a given interpreter. |
| 560 |
*/ |
| 561 |
|
| 562 |
target = Tcl_GetSlave(interp, targetName); |
| 563 |
if (target == NULL) { |
| 564 |
return TCL_ERROR; |
| 565 |
} |
| 566 |
ipPtr = (InterpPackage *) Tcl_GetAssocData(target, "tclLoad", |
| 567 |
(Tcl_InterpDeleteProc **) NULL); |
| 568 |
prefix = "{"; |
| 569 |
for ( ; ipPtr != NULL; ipPtr = ipPtr->nextPtr) { |
| 570 |
pkgPtr = ipPtr->pkgPtr; |
| 571 |
Tcl_AppendResult(interp, prefix, (char *) NULL); |
| 572 |
Tcl_AppendElement(interp, pkgPtr->fileName); |
| 573 |
Tcl_AppendElement(interp, pkgPtr->packageName); |
| 574 |
Tcl_AppendResult(interp, "}", (char *) NULL); |
| 575 |
prefix = " {"; |
| 576 |
} |
| 577 |
return TCL_OK; |
| 578 |
} |
| 579 |
|
| 580 |
/* |
| 581 |
*---------------------------------------------------------------------- |
| 582 |
* |
| 583 |
* LoadCleanupProc -- |
| 584 |
* |
| 585 |
* This procedure is called to delete all of the InterpPackage |
| 586 |
* structures for an interpreter when the interpreter is deleted. |
| 587 |
* It gets invoked via the Tcl AssocData mechanism. |
| 588 |
* |
| 589 |
* Results: |
| 590 |
* None. |
| 591 |
* |
| 592 |
* Side effects: |
| 593 |
* Storage for all of the InterpPackage procedures for interp |
| 594 |
* get deleted. |
| 595 |
* |
| 596 |
*---------------------------------------------------------------------- |
| 597 |
*/ |
| 598 |
|
| 599 |
static void |
| 600 |
LoadCleanupProc(clientData, interp) |
| 601 |
ClientData clientData; /* Pointer to first InterpPackage structure |
| 602 |
* for interp. */ |
| 603 |
Tcl_Interp *interp; /* Interpreter that is being deleted. */ |
| 604 |
{ |
| 605 |
InterpPackage *ipPtr, *nextPtr; |
| 606 |
|
| 607 |
ipPtr = (InterpPackage *) clientData; |
| 608 |
while (ipPtr != NULL) { |
| 609 |
nextPtr = ipPtr->nextPtr; |
| 610 |
ckfree((char *) ipPtr); |
| 611 |
ipPtr = nextPtr; |
| 612 |
} |
| 613 |
} |
| 614 |
|
| 615 |
/* |
| 616 |
*---------------------------------------------------------------------- |
| 617 |
* |
| 618 |
* TclFinalizeLoad -- |
| 619 |
* |
| 620 |
* This procedure is invoked just before the application exits. |
| 621 |
* It frees all of the LoadedPackage structures. |
| 622 |
* |
| 623 |
* Results: |
| 624 |
* None. |
| 625 |
* |
| 626 |
* Side effects: |
| 627 |
* Memory is freed. |
| 628 |
* |
| 629 |
*---------------------------------------------------------------------- |
| 630 |
*/ |
| 631 |
|
| 632 |
void |
| 633 |
TclFinalizeLoad() |
| 634 |
{ |
| 635 |
LoadedPackage *pkgPtr; |
| 636 |
|
| 637 |
/* |
| 638 |
* No synchronization here because there should just be |
| 639 |
* one thread alive at this point. Logically, |
| 640 |
* packageMutex should be grabbed at this point, but |
| 641 |
* the Mutexes get finalized before the call to this routine. |
| 642 |
* The only subsystem left alive at this point is the |
| 643 |
* memory allocator. |
| 644 |
*/ |
| 645 |
|
| 646 |
while (firstPackagePtr != NULL) { |
| 647 |
pkgPtr = firstPackagePtr; |
| 648 |
firstPackagePtr = pkgPtr->nextPtr; |
| 649 |
#if defined(TCL_UNLOAD_DLLS) || defined(__WIN32__) |
| 650 |
/* |
| 651 |
* Some Unix dlls are poorly behaved - registering things like |
| 652 |
* atexit calls that can't be unregistered. If you unload |
| 653 |
* such dlls, you get a core on exit because it wants to |
| 654 |
* call a function in the dll after it's been unloaded. |
| 655 |
*/ |
| 656 |
if (pkgPtr->fileName[0] != '\0') { |
| 657 |
TclpUnloadFile(pkgPtr->clientData); |
| 658 |
} |
| 659 |
#endif |
| 660 |
ckfree(pkgPtr->fileName); |
| 661 |
ckfree(pkgPtr->packageName); |
| 662 |
ckfree((char *) pkgPtr); |
| 663 |
} |
| 664 |
} |
| 665 |
|
| 666 |
/* End of tclload.c */ |
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