+++ /dev/null
-/*
- * tclLoad.c --
- *
- * This file provides the generic portion (those that are the same on all
- * platforms) of Tcl's dynamic loading facilities.
- *
- * Copyright (c) 1995-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution of
- * this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
-#include "tclInt.h"
-
-/*
- * The following structure describes a package that has been loaded either
- * dynamically (with the "load" command) or statically (as indicated by a call
- * to TclGetLoadedPackages). All such packages are linked together into a
- * single list for the process. Packages are never unloaded, until the
- * application exits, when TclFinalizeLoad is called, and these structures are
- * freed.
- */
-
-typedef struct LoadedPackage {
- char *fileName; /* Name of the file from which the package was
- * loaded. An empty string means the package
- * is loaded statically. Malloc-ed. */
- char *packageName; /* Name of package prefix for the package,
- * properly capitalized (first letter UC,
- * others LC), no "_", as in "Net".
- * Malloc-ed. */
- Tcl_LoadHandle loadHandle; /* Token for the loaded file which should be
- * passed to (*unLoadProcPtr)() when the file
- * is no longer needed. If fileName is NULL,
- * then this field is irrelevant. */
- Tcl_PackageInitProc *initProc;
- /* Initialization function to call to
- * incorporate this package into a trusted
- * interpreter. */
- Tcl_PackageInitProc *safeInitProc;
- /* Initialization function to call to
- * incorporate this package into a safe
- * interpreter (one that will execute
- * untrusted scripts). NULL means the package
- * can't be used in unsafe interpreters. */
- Tcl_PackageUnloadProc *unloadProc;
- /* Finalisation function to unload a package
- * from a trusted interpreter. NULL means that
- * the package cannot be unloaded. */
- Tcl_PackageUnloadProc *safeUnloadProc;
- /* Finalisation function to unload a package
- * from a safe interpreter. NULL means that
- * the package cannot be unloaded. */
- int interpRefCount; /* How many times the package has been loaded
- * in trusted interpreters. */
- int safeInterpRefCount; /* How many times the package has been loaded
- * in safe interpreters. */
- struct LoadedPackage *nextPtr;
- /* Next in list of all packages loaded into
- * this application process. NULL means end of
- * list. */
-} LoadedPackage;
-
-/*
- * TCL_THREADS
- * There is a global list of packages that is anchored at firstPackagePtr.
- * Access to this list is governed by a mutex.
- */
-
-static LoadedPackage *firstPackagePtr = NULL;
- /* First in list of all packages loaded into
- * this process. */
-
-TCL_DECLARE_MUTEX(packageMutex)
-
-/*
- * The following structure represents a particular package that has been
- * incorporated into a particular interpreter (by calling its initialization
- * function). There is a list of these structures for each interpreter, with
- * an AssocData value (key "load") for the interpreter that points to the
- * first package (if any).
- */
-
-typedef struct InterpPackage {
- LoadedPackage *pkgPtr; /* Points to detailed information about
- * package. */
- struct InterpPackage *nextPtr;
- /* Next package in this interpreter, or NULL
- * for end of list. */
-} InterpPackage;
-
-/*
- * Prototypes for functions that are private to this file:
- */
-
-static void LoadCleanupProc(ClientData clientData,
- Tcl_Interp *interp);
-\f
-/*
- *----------------------------------------------------------------------
- *
- * Tcl_LoadObjCmd --
- *
- * This function is invoked to process the "load" Tcl command. See the
- * user documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *----------------------------------------------------------------------
- */
-
-int
-Tcl_LoadObjCmd(
- ClientData dummy, /* Not used. */
- Tcl_Interp *interp, /* Current interpreter. */
- int objc, /* Number of arguments. */
- Tcl_Obj *const objv[]) /* Argument objects. */
-{
- Tcl_Interp *target;
- LoadedPackage *pkgPtr, *defaultPtr;
- Tcl_DString pkgName, tmp, initName, safeInitName;
- Tcl_DString unloadName, safeUnloadName;
- InterpPackage *ipFirstPtr, *ipPtr;
- int code, namesMatch, filesMatch, offset;
- const char *symbols[2];
- Tcl_PackageInitProc *initProc;
- const char *p, *fullFileName, *packageName;
- Tcl_LoadHandle loadHandle;
- Tcl_UniChar ch;
- unsigned len;
- int index, flags = 0;
- Tcl_Obj *const *savedobjv = objv;
- static const char *const options[] = {
- "-global", "-lazy", "--", NULL
- };
- enum options {
- LOAD_GLOBAL, LOAD_LAZY, LOAD_LAST
- };
-
- while (objc > 2) {
- if (TclGetString(objv[1])[0] != '-') {
- break;
- }
- if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0,
- &index) != TCL_OK) {
- return TCL_ERROR;
- }
- ++objv; --objc;
- if (LOAD_GLOBAL == (enum options) index) {
- flags |= TCL_LOAD_GLOBAL;
- } else if (LOAD_LAZY == (enum options) index) {
- flags |= TCL_LOAD_LAZY;
- } else {
- break;
- }
- }
- if ((objc < 2) || (objc > 4)) {
- Tcl_WrongNumArgs(interp, 1, savedobjv, "?-global? ?-lazy? ?--? fileName ?packageName? ?interp?");
- return TCL_ERROR;
- }
- if (Tcl_FSConvertToPathType(interp, objv[1]) != TCL_OK) {
- return TCL_ERROR;
- }
- fullFileName = Tcl_GetString(objv[1]);
-
- Tcl_DStringInit(&pkgName);
- Tcl_DStringInit(&initName);
- Tcl_DStringInit(&safeInitName);
- Tcl_DStringInit(&unloadName);
- Tcl_DStringInit(&safeUnloadName);
- Tcl_DStringInit(&tmp);
-
- packageName = NULL;
- if (objc >= 3) {
- packageName = Tcl_GetString(objv[2]);
- if (packageName[0] == '\0') {
- packageName = NULL;
- }
- }
- if ((fullFileName[0] == 0) && (packageName == NULL)) {
- Tcl_SetObjResult(interp, Tcl_NewStringObj(
- "must specify either file name or package name", -1));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "LOAD", "NOLIBRARY",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
-
- /*
- * Figure out which interpreter we're going to load the package into.
- */
-
- target = interp;
- if (objc == 4) {
- const char *slaveIntName = Tcl_GetString(objv[3]);
-
- target = Tcl_GetSlave(interp, slaveIntName);
- if (target == NULL) {
- code = TCL_ERROR;
- goto done;
- }
- }
-
- /*
- * Scan through the packages that are currently loaded to see if the
- * package we want is already loaded. We'll use a loaded package if it
- * meets any of the following conditions:
- * - Its name and file match the once we're looking for.
- * - Its file matches, and we weren't given a name.
- * - Its name matches, the file name was specified as empty, and there is
- * only no statically loaded package with the same name.
- */
-
- Tcl_MutexLock(&packageMutex);
-
- defaultPtr = NULL;
- for (pkgPtr = firstPackagePtr; pkgPtr != NULL; pkgPtr = pkgPtr->nextPtr) {
- if (packageName == NULL) {
- namesMatch = 0;
- } else {
- TclDStringClear(&pkgName);
- Tcl_DStringAppend(&pkgName, packageName, -1);
- TclDStringClear(&tmp);
- Tcl_DStringAppend(&tmp, pkgPtr->packageName, -1);
- Tcl_UtfToLower(Tcl_DStringValue(&pkgName));
- Tcl_UtfToLower(Tcl_DStringValue(&tmp));
- if (strcmp(Tcl_DStringValue(&tmp),
- Tcl_DStringValue(&pkgName)) == 0) {
- namesMatch = 1;
- } else {
- namesMatch = 0;
- }
- }
- TclDStringClear(&pkgName);
-
- filesMatch = (strcmp(pkgPtr->fileName, fullFileName) == 0);
- if (filesMatch && (namesMatch || (packageName == NULL))) {
- break;
- }
- if (namesMatch && (fullFileName[0] == 0)) {
- defaultPtr = pkgPtr;
- }
- if (filesMatch && !namesMatch && (fullFileName[0] != 0)) {
- /*
- * Can't have two different packages loaded from the same file.
- */
-
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "file \"%s\" is already loaded for package \"%s\"",
- fullFileName, pkgPtr->packageName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "LOAD",
- "SPLITPERSONALITY", NULL);
- code = TCL_ERROR;
- Tcl_MutexUnlock(&packageMutex);
- goto done;
- }
- }
- Tcl_MutexUnlock(&packageMutex);
- if (pkgPtr == NULL) {
- pkgPtr = defaultPtr;
- }
-
- /*
- * Scan through the list of packages already loaded in the target
- * interpreter. If the package we want is already loaded there, then
- * there's nothing for us to do.
- */
-
- if (pkgPtr != NULL) {
- ipFirstPtr = Tcl_GetAssocData(target, "tclLoad", NULL);
- for (ipPtr = ipFirstPtr; ipPtr != NULL; ipPtr = ipPtr->nextPtr) {
- if (ipPtr->pkgPtr == pkgPtr) {
- code = TCL_OK;
- goto done;
- }
- }
- }
-
- if (pkgPtr == NULL) {
- /*
- * The desired file isn't currently loaded, so load it. It's an error
- * if the desired package is a static one.
- */
-
- if (fullFileName[0] == 0) {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "package \"%s\" isn't loaded statically", packageName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "LOAD", "NOTSTATIC",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
-
- /*
- * Figure out the module name if it wasn't provided explicitly.
- */
-
- if (packageName != NULL) {
- Tcl_DStringAppend(&pkgName, packageName, -1);
- } else {
- int retc;
-
- /*
- * Threading note - this call used to be protected by a mutex.
- */
-
- retc = TclGuessPackageName(fullFileName, &pkgName);
- if (!retc) {
- Tcl_Obj *splitPtr, *pkgGuessPtr;
- int pElements;
- const char *pkgGuess;
-
- /*
- * The platform-specific code couldn't figure out the module
- * name. Make a guess by taking the last element of the file
- * name, stripping off any leading "lib", and then using all
- * of the alphabetic and underline characters that follow
- * that.
- */
-
- splitPtr = Tcl_FSSplitPath(objv[1], &pElements);
- Tcl_ListObjIndex(NULL, splitPtr, pElements -1, &pkgGuessPtr);
- pkgGuess = Tcl_GetString(pkgGuessPtr);
- if ((pkgGuess[0] == 'l') && (pkgGuess[1] == 'i')
- && (pkgGuess[2] == 'b')) {
- pkgGuess += 3;
- }
-#ifdef __CYGWIN__
- if ((pkgGuess[0] == 'c') && (pkgGuess[1] == 'y')
- && (pkgGuess[2] == 'g')) {
- pkgGuess += 3;
- }
-#endif /* __CYGWIN__ */
- for (p = pkgGuess; *p != 0; p += offset) {
- offset = Tcl_UtfToUniChar(p, &ch);
- if ((ch > 0x100)
- || !(isalpha(UCHAR(ch)) /* INTL: ISO only */
- || (UCHAR(ch) == '_'))) {
- break;
- }
- }
- if (p == pkgGuess) {
- Tcl_DecrRefCount(splitPtr);
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "couldn't figure out package name for %s",
- fullFileName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "LOAD",
- "WHATPACKAGE", NULL);
- code = TCL_ERROR;
- goto done;
- }
- Tcl_DStringAppend(&pkgName, pkgGuess, p - pkgGuess);
- Tcl_DecrRefCount(splitPtr);
- }
- }
-
- /*
- * Fix the capitalization in the package name so that the first
- * character is in caps (or title case) but the others are all
- * lower-case.
- */
-
- Tcl_DStringSetLength(&pkgName,
- Tcl_UtfToTitle(Tcl_DStringValue(&pkgName)));
-
- /*
- * Compute the names of the two initialization functions, based on the
- * package name.
- */
-
- TclDStringAppendDString(&initName, &pkgName);
- TclDStringAppendLiteral(&initName, "_Init");
- TclDStringAppendDString(&safeInitName, &pkgName);
- TclDStringAppendLiteral(&safeInitName, "_SafeInit");
- TclDStringAppendDString(&unloadName, &pkgName);
- TclDStringAppendLiteral(&unloadName, "_Unload");
- TclDStringAppendDString(&safeUnloadName, &pkgName);
- TclDStringAppendLiteral(&safeUnloadName, "_SafeUnload");
-
- /*
- * Call platform-specific code to load the package and find the two
- * initialization functions.
- */
-
- symbols[0] = Tcl_DStringValue(&initName);
- symbols[1] = NULL;
-
- Tcl_MutexLock(&packageMutex);
- code = Tcl_LoadFile(interp, objv[1], symbols, flags, &initProc,
- &loadHandle);
- Tcl_MutexUnlock(&packageMutex);
- if (code != TCL_OK) {
- goto done;
- }
-
- /*
- * Create a new record to describe this package.
- */
-
- pkgPtr = ckalloc(sizeof(LoadedPackage));
- len = strlen(fullFileName) + 1;
- pkgPtr->fileName = ckalloc(len);
- memcpy(pkgPtr->fileName, fullFileName, len);
- len = (unsigned) Tcl_DStringLength(&pkgName) + 1;
- pkgPtr->packageName = ckalloc(len);
- memcpy(pkgPtr->packageName, Tcl_DStringValue(&pkgName), len);
- pkgPtr->loadHandle = loadHandle;
- pkgPtr->initProc = initProc;
- pkgPtr->safeInitProc = (Tcl_PackageInitProc *)
- Tcl_FindSymbol(interp, loadHandle,
- Tcl_DStringValue(&safeInitName));
- pkgPtr->unloadProc = (Tcl_PackageUnloadProc *)
- Tcl_FindSymbol(interp, loadHandle,
- Tcl_DStringValue(&unloadName));
- pkgPtr->safeUnloadProc = (Tcl_PackageUnloadProc *)
- Tcl_FindSymbol(interp, loadHandle,
- Tcl_DStringValue(&safeUnloadName));
- pkgPtr->interpRefCount = 0;
- pkgPtr->safeInterpRefCount = 0;
-
- Tcl_MutexLock(&packageMutex);
- pkgPtr->nextPtr = firstPackagePtr;
- firstPackagePtr = pkgPtr;
- Tcl_MutexUnlock(&packageMutex);
-
- /*
- * The Tcl_FindSymbol calls may have left a spurious error message in
- * the interpreter result.
- */
-
- Tcl_ResetResult(interp);
- }
-
- /*
- * Invoke the package's initialization function (either the normal one or
- * the safe one, depending on whether or not the interpreter is safe).
- */
-
- if (Tcl_IsSafe(target)) {
- if (pkgPtr->safeInitProc == NULL) {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "can't use package in a safe interpreter: no"
- " %s_SafeInit procedure", pkgPtr->packageName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "LOAD", "UNSAFE",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
- code = pkgPtr->safeInitProc(target);
- } else {
- if (pkgPtr->initProc == NULL) {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "can't attach package to interpreter: no %s_Init procedure",
- pkgPtr->packageName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "LOAD", "ENTRYPOINT",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
- code = pkgPtr->initProc(target);
- }
-
- /*
- * Test for whether the initialization failed. If so, transfer the error
- * from the target interpreter to the originating one.
- */
-
- if (code != TCL_OK) {
- Tcl_TransferResult(target, code, interp);
- goto done;
- }
-
- /*
- * Record the fact that the package has been loaded in the target
- * interpreter.
- *
- * Update the proper reference count.
- */
-
- Tcl_MutexLock(&packageMutex);
- if (Tcl_IsSafe(target)) {
- pkgPtr->safeInterpRefCount++;
- } else {
- pkgPtr->interpRefCount++;
- }
- Tcl_MutexUnlock(&packageMutex);
-
- /*
- * Refetch ipFirstPtr: loading the package may have introduced additional
- * static packages at the head of the linked list!
- */
-
- ipFirstPtr = Tcl_GetAssocData(target, "tclLoad", NULL);
- ipPtr = ckalloc(sizeof(InterpPackage));
- ipPtr->pkgPtr = pkgPtr;
- ipPtr->nextPtr = ipFirstPtr;
- Tcl_SetAssocData(target, "tclLoad", LoadCleanupProc, ipPtr);
-
- done:
- Tcl_DStringFree(&pkgName);
- Tcl_DStringFree(&initName);
- Tcl_DStringFree(&safeInitName);
- Tcl_DStringFree(&unloadName);
- Tcl_DStringFree(&safeUnloadName);
- Tcl_DStringFree(&tmp);
- return code;
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * Tcl_UnloadObjCmd --
- *
- * This function is invoked to process the "unload" Tcl command. See the
- * user documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *----------------------------------------------------------------------
- */
-
-int
-Tcl_UnloadObjCmd(
- ClientData dummy, /* Not used. */
- Tcl_Interp *interp, /* Current interpreter. */
- int objc, /* Number of arguments. */
- Tcl_Obj *const objv[]) /* Argument objects. */
-{
- Tcl_Interp *target; /* Which interpreter to unload from. */
- LoadedPackage *pkgPtr, *defaultPtr;
- Tcl_DString pkgName, tmp;
- Tcl_PackageUnloadProc *unloadProc;
- InterpPackage *ipFirstPtr, *ipPtr;
- int i, index, code, complain = 1, keepLibrary = 0;
- int trustedRefCount = -1, safeRefCount = -1;
- const char *fullFileName = "";
- const char *packageName;
- static const char *const options[] = {
- "-nocomplain", "-keeplibrary", "--", NULL
- };
- enum options {
- UNLOAD_NOCOMPLAIN, UNLOAD_KEEPLIB, UNLOAD_LAST
- };
-
- for (i = 1; i < objc; i++) {
- if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0,
- &index) != TCL_OK) {
- fullFileName = Tcl_GetString(objv[i]);
- if (fullFileName[0] == '-') {
- /*
- * It looks like the command contains an option so signal an
- * error
- */
-
- return TCL_ERROR;
- } else {
- /*
- * This clearly isn't an option; assume it's the filename. We
- * must clear the error.
- */
-
- Tcl_ResetResult(interp);
- break;
- }
- }
- switch (index) {
- case UNLOAD_NOCOMPLAIN: /* -nocomplain */
- complain = 0;
- break;
- case UNLOAD_KEEPLIB: /* -keeplibrary */
- keepLibrary = 1;
- break;
- case UNLOAD_LAST: /* -- */
- i++;
- goto endOfForLoop;
- }
- }
- endOfForLoop:
- if ((objc-i < 1) || (objc-i > 3)) {
- Tcl_WrongNumArgs(interp, 1, objv,
- "?-switch ...? fileName ?packageName? ?interp?");
- return TCL_ERROR;
- }
- if (Tcl_FSConvertToPathType(interp, objv[i]) != TCL_OK) {
- return TCL_ERROR;
- }
-
- fullFileName = Tcl_GetString(objv[i]);
- Tcl_DStringInit(&pkgName);
- Tcl_DStringInit(&tmp);
-
- packageName = NULL;
- if (objc - i >= 2) {
- packageName = Tcl_GetString(objv[i+1]);
- if (packageName[0] == '\0') {
- packageName = NULL;
- }
- }
- if ((fullFileName[0] == 0) && (packageName == NULL)) {
- Tcl_SetObjResult(interp, Tcl_NewStringObj(
- "must specify either file name or package name", -1));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "UNLOAD", "NOLIBRARY",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
-
- /*
- * Figure out which interpreter we're going to load the package into.
- */
-
- target = interp;
- if (objc - i == 3) {
- const char *slaveIntName = Tcl_GetString(objv[i + 2]);
-
- target = Tcl_GetSlave(interp, slaveIntName);
- if (target == NULL) {
- return TCL_ERROR;
- }
- }
-
- /*
- * Scan through the packages that are currently loaded to see if the
- * package we want is already loaded. We'll use a loaded package if it
- * meets any of the following conditions:
- * - Its name and file match the once we're looking for.
- * - Its file matches, and we weren't given a name.
- * - Its name matches, the file name was specified as empty, and there is
- * only no statically loaded package with the same name.
- */
-
- Tcl_MutexLock(&packageMutex);
-
- defaultPtr = NULL;
- for (pkgPtr = firstPackagePtr; pkgPtr != NULL; pkgPtr = pkgPtr->nextPtr) {
- int namesMatch, filesMatch;
-
- if (packageName == NULL) {
- namesMatch = 0;
- } else {
- TclDStringClear(&pkgName);
- Tcl_DStringAppend(&pkgName, packageName, -1);
- TclDStringClear(&tmp);
- Tcl_DStringAppend(&tmp, pkgPtr->packageName, -1);
- Tcl_UtfToLower(Tcl_DStringValue(&pkgName));
- Tcl_UtfToLower(Tcl_DStringValue(&tmp));
- if (strcmp(Tcl_DStringValue(&tmp),
- Tcl_DStringValue(&pkgName)) == 0) {
- namesMatch = 1;
- } else {
- namesMatch = 0;
- }
- }
- TclDStringClear(&pkgName);
-
- filesMatch = (strcmp(pkgPtr->fileName, fullFileName) == 0);
- if (filesMatch && (namesMatch || (packageName == NULL))) {
- break;
- }
- if (namesMatch && (fullFileName[0] == 0)) {
- defaultPtr = pkgPtr;
- }
- if (filesMatch && !namesMatch && (fullFileName[0] != 0)) {
- break;
- }
- }
- Tcl_MutexUnlock(&packageMutex);
- if (fullFileName[0] == 0) {
- /*
- * It's an error to try unload a static package.
- */
-
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "package \"%s\" is loaded statically and cannot be unloaded",
- packageName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "UNLOAD", "STATIC",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
- if (pkgPtr == NULL) {
- /*
- * The DLL pointed by the provided filename has never been loaded.
- */
-
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "file \"%s\" has never been loaded", fullFileName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "UNLOAD", "NEVERLOADED",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
-
- /*
- * Scan through the list of packages already loaded in the target
- * interpreter. If the package we want is already loaded there, then we
- * should proceed with unloading.
- */
-
- code = TCL_ERROR;
- if (pkgPtr != NULL) {
- ipFirstPtr = Tcl_GetAssocData(target, "tclLoad", NULL);
- for (ipPtr = ipFirstPtr; ipPtr != NULL; ipPtr = ipPtr->nextPtr) {
- if (ipPtr->pkgPtr == pkgPtr) {
- code = TCL_OK;
- break;
- }
- }
- }
- if (code != TCL_OK) {
- /*
- * The package has not been loaded in this interpreter.
- */
-
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "file \"%s\" has never been loaded in this interpreter",
- fullFileName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "UNLOAD", "NEVERLOADED",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
-
- /*
- * Ensure that the DLL can be unloaded. If it is a trusted interpreter,
- * pkgPtr->unloadProc must not be NULL for the DLL to be unloadable. If
- * the interpreter is a safe one, pkgPtr->safeUnloadProc must be non-NULL.
- */
-
- if (Tcl_IsSafe(target)) {
- if (pkgPtr->safeUnloadProc == NULL) {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "file \"%s\" cannot be unloaded under a safe interpreter",
- fullFileName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "UNLOAD", "CANNOT",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
- unloadProc = pkgPtr->safeUnloadProc;
- } else {
- if (pkgPtr->unloadProc == NULL) {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "file \"%s\" cannot be unloaded under a trusted interpreter",
- fullFileName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "UNLOAD", "CANNOT",
- NULL);
- code = TCL_ERROR;
- goto done;
- }
- unloadProc = pkgPtr->unloadProc;
- }
-
- /*
- * We are ready to unload the package. First, evaluate the unload
- * function. If this fails, we cannot proceed with unload. Also, we must
- * specify the proper flag to pass to the unload callback.
- * TCL_UNLOAD_DETACH_FROM_INTERPRETER is defined when the callback should
- * only remove itself from the interpreter; the library will be unloaded
- * in a future call of unload. In case the library will be unloaded just
- * after the callback returns, TCL_UNLOAD_DETACH_FROM_PROCESS is passed.
- */
-
- code = TCL_UNLOAD_DETACH_FROM_INTERPRETER;
- if (!keepLibrary) {
- Tcl_MutexLock(&packageMutex);
- trustedRefCount = pkgPtr->interpRefCount;
- safeRefCount = pkgPtr->safeInterpRefCount;
- Tcl_MutexUnlock(&packageMutex);
-
- if (Tcl_IsSafe(target)) {
- safeRefCount--;
- } else {
- trustedRefCount--;
- }
-
- if (safeRefCount <= 0 && trustedRefCount <= 0) {
- code = TCL_UNLOAD_DETACH_FROM_PROCESS;
- }
- }
- code = unloadProc(target, code);
- if (code != TCL_OK) {
- Tcl_TransferResult(target, code, interp);
- goto done;
- }
-
- /*
- * The unload function executed fine. Examine the reference count to see
- * if we unload the DLL.
- */
-
- Tcl_MutexLock(&packageMutex);
- if (Tcl_IsSafe(target)) {
- pkgPtr->safeInterpRefCount--;
-
- /*
- * Do not let counter get negative.
- */
-
- if (pkgPtr->safeInterpRefCount < 0) {
- pkgPtr->safeInterpRefCount = 0;
- }
- } else {
- pkgPtr->interpRefCount--;
-
- /*
- * Do not let counter get negative.
- */
-
- if (pkgPtr->interpRefCount < 0) {
- pkgPtr->interpRefCount = 0;
- }
- }
- trustedRefCount = pkgPtr->interpRefCount;
- safeRefCount = pkgPtr->safeInterpRefCount;
- Tcl_MutexUnlock(&packageMutex);
-
- code = TCL_OK;
- if (pkgPtr->safeInterpRefCount <= 0 && pkgPtr->interpRefCount <= 0
- && !keepLibrary) {
- /*
- * Unload the shared library from the application memory...
- */
-
-#if defined(TCL_UNLOAD_DLLS) || defined(_WIN32)
- /*
- * Some Unix dlls are poorly behaved - registering things like atexit
- * calls that can't be unregistered. If you unload such dlls, you get
- * a core on exit because it wants to call a function in the dll after
- * it's been unloaded.
- */
-
- if (pkgPtr->fileName[0] != '\0') {
- Tcl_MutexLock(&packageMutex);
- if (Tcl_FSUnloadFile(interp, pkgPtr->loadHandle) == TCL_OK) {
- /*
- * Remove this library from the loaded library cache.
- */
-
- defaultPtr = pkgPtr;
- if (defaultPtr == firstPackagePtr) {
- firstPackagePtr = pkgPtr->nextPtr;
- } else {
- for (pkgPtr = firstPackagePtr; pkgPtr != NULL;
- pkgPtr = pkgPtr->nextPtr) {
- if (pkgPtr->nextPtr == defaultPtr) {
- pkgPtr->nextPtr = defaultPtr->nextPtr;
- break;
- }
- }
- }
-
- /*
- * Remove this library from the interpreter's library cache.
- */
-
- ipFirstPtr = Tcl_GetAssocData(target, "tclLoad", NULL);
- ipPtr = ipFirstPtr;
- if (ipPtr->pkgPtr == defaultPtr) {
- ipFirstPtr = ipFirstPtr->nextPtr;
- } else {
- InterpPackage *ipPrevPtr;
-
- for (ipPrevPtr = ipPtr; ipPtr != NULL;
- ipPrevPtr = ipPtr, ipPtr = ipPtr->nextPtr) {
- if (ipPtr->pkgPtr == pkgPtr) {
- ipPrevPtr->nextPtr = ipPtr->nextPtr;
- break;
- }
- }
- }
- Tcl_SetAssocData(target, "tclLoad", LoadCleanupProc,
- ipFirstPtr);
- ckfree(defaultPtr->fileName);
- ckfree(defaultPtr->packageName);
- ckfree(defaultPtr);
- ckfree(ipPtr);
- Tcl_MutexUnlock(&packageMutex);
- } else {
- code = TCL_ERROR;
- }
- }
-#else
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "file \"%s\" cannot be unloaded: unloading disabled",
- fullFileName));
- Tcl_SetErrorCode(interp, "TCL", "OPERATION", "UNLOAD", "DISABLED",
- NULL);
- code = TCL_ERROR;
-#endif
- }
-
- done:
- Tcl_DStringFree(&pkgName);
- Tcl_DStringFree(&tmp);
- if (!complain && (code != TCL_OK)) {
- code = TCL_OK;
- Tcl_ResetResult(interp);
- }
- return code;
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * Tcl_StaticPackage --
- *
- * This function is invoked to indicate that a particular package has
- * been linked statically with an application.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Once this function completes, the package becomes loadable via the
- * "load" command with an empty file name.
- *
- *----------------------------------------------------------------------
- */
-
-void
-Tcl_StaticPackage(
- Tcl_Interp *interp, /* If not NULL, it means that the package has
- * already been loaded into the given
- * interpreter by calling the appropriate init
- * proc. */
- const char *pkgName, /* Name of package (must be properly
- * capitalized: first letter upper case,
- * others lower case). */
- Tcl_PackageInitProc *initProc,
- /* Function to call to incorporate this
- * package into a trusted interpreter. */
- Tcl_PackageInitProc *safeInitProc)
- /* Function to call to incorporate this
- * package into a safe interpreter (one that
- * will execute untrusted scripts). NULL means
- * the package can't be used in safe
- * interpreters. */
-{
- LoadedPackage *pkgPtr;
- InterpPackage *ipPtr, *ipFirstPtr;
-
- /*
- * Check to see if someone else has already reported this package as
- * statically loaded in the process.
- */
-
- Tcl_MutexLock(&packageMutex);
- for (pkgPtr = firstPackagePtr; pkgPtr != NULL; pkgPtr = pkgPtr->nextPtr) {
- if ((pkgPtr->initProc == initProc)
- && (pkgPtr->safeInitProc == safeInitProc)
- && (strcmp(pkgPtr->packageName, pkgName) == 0)) {
- break;
- }
- }
- Tcl_MutexUnlock(&packageMutex);
-
- /*
- * If the package is not yet recorded as being loaded statically, add it
- * to the list now.
- */
-
- if (pkgPtr == NULL) {
- pkgPtr = ckalloc(sizeof(LoadedPackage));
- pkgPtr->fileName = ckalloc(1);
- pkgPtr->fileName[0] = 0;
- pkgPtr->packageName = ckalloc(strlen(pkgName) + 1);
- strcpy(pkgPtr->packageName, pkgName);
- pkgPtr->loadHandle = NULL;
- pkgPtr->initProc = initProc;
- pkgPtr->safeInitProc = safeInitProc;
- Tcl_MutexLock(&packageMutex);
- pkgPtr->nextPtr = firstPackagePtr;
- firstPackagePtr = pkgPtr;
- Tcl_MutexUnlock(&packageMutex);
- }
-
- if (interp != NULL) {
-
- /*
- * If we're loading the package into an interpreter, determine whether
- * it's already loaded.
- */
-
- ipFirstPtr = Tcl_GetAssocData(interp, "tclLoad", NULL);
- for (ipPtr = ipFirstPtr; ipPtr != NULL; ipPtr = ipPtr->nextPtr) {
- if (ipPtr->pkgPtr == pkgPtr) {
- return;
- }
- }
-
- /*
- * Package isn't loade in the current interp yet. Mark it as now being
- * loaded.
- */
-
- ipPtr = ckalloc(sizeof(InterpPackage));
- ipPtr->pkgPtr = pkgPtr;
- ipPtr->nextPtr = ipFirstPtr;
- Tcl_SetAssocData(interp, "tclLoad", LoadCleanupProc, ipPtr);
- }
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * TclGetLoadedPackages --
- *
- * This function returns information about all of the files that are
- * loaded (either in a particular intepreter, or for all interpreters).
- *
- * Results:
- * The return value is a standard Tcl completion code. If successful, a
- * list of lists is placed in the interp's result. Each sublist
- * corresponds to one loaded file; its first element is the name of the
- * file (or an empty string for something that's statically loaded) and
- * the second element is the name of the package in that file.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclGetLoadedPackages(
- Tcl_Interp *interp, /* Interpreter in which to return information
- * or error message. */
- const char *targetName) /* Name of target interpreter or NULL. If
- * NULL, return info about all interps;
- * otherwise, just return info about this
- * interpreter. */
-{
- Tcl_Interp *target;
- LoadedPackage *pkgPtr;
- InterpPackage *ipPtr;
- Tcl_Obj *resultObj, *pkgDesc[2];
-
- if (targetName == NULL) {
- /*
- * Return information about all of the available packages.
- */
-
- resultObj = Tcl_NewObj();
- Tcl_MutexLock(&packageMutex);
- for (pkgPtr = firstPackagePtr; pkgPtr != NULL;
- pkgPtr = pkgPtr->nextPtr) {
- pkgDesc[0] = Tcl_NewStringObj(pkgPtr->fileName, -1);
- pkgDesc[1] = Tcl_NewStringObj(pkgPtr->packageName, -1);
- Tcl_ListObjAppendElement(NULL, resultObj,
- Tcl_NewListObj(2, pkgDesc));
- }
- Tcl_MutexUnlock(&packageMutex);
- Tcl_SetObjResult(interp, resultObj);
- return TCL_OK;
- }
-
- /*
- * Return information about only the packages that are loaded in a given
- * interpreter.
- */
-
- target = Tcl_GetSlave(interp, targetName);
- if (target == NULL) {
- return TCL_ERROR;
- }
- ipPtr = Tcl_GetAssocData(target, "tclLoad", NULL);
- resultObj = Tcl_NewObj();
- for (; ipPtr != NULL; ipPtr = ipPtr->nextPtr) {
- pkgPtr = ipPtr->pkgPtr;
- pkgDesc[0] = Tcl_NewStringObj(pkgPtr->fileName, -1);
- pkgDesc[1] = Tcl_NewStringObj(pkgPtr->packageName, -1);
- Tcl_ListObjAppendElement(NULL, resultObj, Tcl_NewListObj(2, pkgDesc));
- }
- Tcl_SetObjResult(interp, resultObj);
- return TCL_OK;
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * LoadCleanupProc --
- *
- * This function is called to delete all of the InterpPackage structures
- * for an interpreter when the interpreter is deleted. It gets invoked
- * via the Tcl AssocData mechanism.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Storage for all of the InterpPackage functions for interp get deleted.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-LoadCleanupProc(
- ClientData clientData, /* Pointer to first InterpPackage structure
- * for interp. */
- Tcl_Interp *interp) /* Interpreter that is being deleted. */
-{
- InterpPackage *ipPtr, *nextPtr;
-
- ipPtr = clientData;
- while (ipPtr != NULL) {
- nextPtr = ipPtr->nextPtr;
- ckfree(ipPtr);
- ipPtr = nextPtr;
- }
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * TclFinalizeLoad --
- *
- * This function is invoked just before the application exits. It frees
- * all of the LoadedPackage structures.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Memory is freed.
- *
- *----------------------------------------------------------------------
- */
-
-void
-TclFinalizeLoad(void)
-{
- LoadedPackage *pkgPtr;
-
- /*
- * No synchronization here because there should just be one thread alive
- * at this point. Logically, packageMutex should be grabbed at this point,
- * but the Mutexes get finalized before the call to this routine. The only
- * subsystem left alive at this point is the memory allocator.
- */
-
- while (firstPackagePtr != NULL) {
- pkgPtr = firstPackagePtr;
- firstPackagePtr = pkgPtr->nextPtr;
-
-#if defined(TCL_UNLOAD_DLLS) || defined(_WIN32)
- /*
- * Some Unix dlls are poorly behaved - registering things like atexit
- * calls that can't be unregistered. If you unload such dlls, you get
- * a core on exit because it wants to call a function in the dll after
- * it has been unloaded.
- */
-
- if (pkgPtr->fileName[0] != '\0') {
- Tcl_FSUnloadFile(NULL, pkgPtr->loadHandle);
- }
-#endif
-
- ckfree(pkgPtr->fileName);
- ckfree(pkgPtr->packageName);
- ckfree(pkgPtr);
- }
-}
-\f
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 4
- * fill-column: 78
- * End:
- */
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