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Diffstat (limited to 'tcl8.6/unix/tclLoadShl.c')
| -rw-r--r-- | tcl8.6/unix/tclLoadShl.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/tcl8.6/unix/tclLoadShl.c b/tcl8.6/unix/tclLoadShl.c deleted file mode 100644 index 4be3d7b..0000000 --- a/tcl8.6/unix/tclLoadShl.c +++ /dev/null @@ -1,224 +0,0 @@ -/* - * tclLoadShl.c -- - * - * This procedure provides a version of the TclLoadFile that works with - * the "shl_load" and "shl_findsym" library procedures for dynamic - * loading (e.g. for HP machines). - * - * 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 <dl.h> -#include "tclInt.h" - -/* - * Static functions defined within this file. - */ - -static void * FindSymbol(Tcl_Interp *interp, - Tcl_LoadHandle loadHandle, const char *symbol); -static void UnloadFile(Tcl_LoadHandle handle); - -/* - *---------------------------------------------------------------------- - * - * TclpDlopen -- - * - * Dynamically loads a binary code file into memory and returns a handle - * to the new code. - * - * Results: - * A standard Tcl completion code. If an error occurs, an error message - * is left in the interp's result. - * - * Side effects: - * New code suddenly appears in memory. - * - *---------------------------------------------------------------------- - */ - -int -TclpDlopen( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Obj *pathPtr, /* Name of the file containing the desired - * code (UTF-8). */ - Tcl_LoadHandle *loadHandle, /* Filled with token for dynamically loaded - * file which will be passed back to - * (*unloadProcPtr)() to unload the file. */ - Tcl_FSUnloadFileProc **unloadProcPtr, - /* Filled with address of Tcl_FSUnloadFileProc - * function which should be used for this - * file. */ - int flags) -{ - shl_t handle; - Tcl_LoadHandle newHandle; - const char *native; - char *fileName = Tcl_GetString(pathPtr); - - /* - * The flags below used to be BIND_IMMEDIATE; they were changed at the - * suggestion of Wolfgang Kechel (wolfgang@prs.de): "This enables - * verbosity for missing symbols when loading a shared lib and allows to - * load libtk8.0.sl into tclsh8.0 without problems. In general, this - * delays resolving symbols until they are actually needed. Shared libs - * do no longer need all libraries linked in when they are build." - */ - - /* - * First try the full path the user gave us. This is particularly - * important if the cwd is inside a vfs, and we are trying to load using a - * relative path. - */ - - native = Tcl_FSGetNativePath(pathPtr); - handle = shl_load(native, BIND_DEFERRED|BIND_VERBOSE, 0L); - - if (handle == NULL) { - /* - * Let the OS loader examine the binary search path for whatever - * string the user gave us which hopefully refers to a file on the - * binary path. - */ - - Tcl_DString ds; - - native = Tcl_UtfToExternalDString(NULL, fileName, -1, &ds); - handle = shl_load(native, BIND_DEFERRED|BIND_VERBOSE|DYNAMIC_PATH, 0L); - Tcl_DStringFree(&ds); - } - - if (handle == NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "couldn't load file \"%s\": %s", - fileName, Tcl_PosixError(interp))); - return TCL_ERROR; - } - newHandle = ckalloc(sizeof(*newHandle)); - newHandle->clientData = handle; - newHandle->findSymbolProcPtr = &FindSymbol; - newHandle->unloadFileProcPtr = *unloadProcPtr = &UnloadFile; - *loadHandle = newHandle; - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_FindSymbol -- - * - * Looks up a symbol, by name, through a handle associated with a - * previously loaded piece of code (shared library). - * - * Results: - * Returns a pointer to the function associated with 'symbol' if it is - * found. Otherwise returns NULL and may leave an error message in the - * interp's result. - * - *---------------------------------------------------------------------- - */ - -static void* -FindSymbol( - Tcl_Interp *interp, - Tcl_LoadHandle loadHandle, - const char *symbol) -{ - Tcl_DString newName; - Tcl_PackageInitProc *proc = NULL; - shl_t handle = (shl_t) loadHandle->clientData; - - /* - * Some versions of the HP system software still use "_" at the beginning - * of exported symbols while others don't; try both forms of each name. - */ - - if (shl_findsym(&handle, symbol, (short) TYPE_PROCEDURE, - (void *) &proc) != 0) { - Tcl_DStringInit(&newName); - TclDStringAppendLiteral(&newName, "_"); - Tcl_DStringAppend(&newName, symbol, -1); - if (shl_findsym(&handle, Tcl_DStringValue(&newName), - (short) TYPE_PROCEDURE, (void *) &proc) != 0) { - proc = NULL; - } - Tcl_DStringFree(&newName); - } - if (proc == NULL && interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "cannot find symbol \"%s\": %s", - symbol, Tcl_PosixError(interp))); - } - return proc; -} - -/* - *---------------------------------------------------------------------- - * - * UnloadFile -- - * - * Unloads a dynamically loaded binary code file from memory. Code - * pointers in the formerly loaded file are no longer valid after calling - * this function. - * - * Results: - * None. - * - * Side effects: - * Code removed from memory. - * - *---------------------------------------------------------------------- - */ - -static void -UnloadFile( - Tcl_LoadHandle loadHandle) /* loadHandle returned by a previous call to - * TclpDlopen(). The loadHandle is a token - * that represents the loaded file. */ -{ - shl_t handle = (shl_t) loadHandle->clientData; - - shl_unload(handle); - ckfree(loadHandle); -} - -/* - *---------------------------------------------------------------------- - * - * TclGuessPackageName -- - * - * If the "load" command is invoked without providing a package name, - * this procedure is invoked to try to figure it out. - * - * Results: - * Always returns 0 to indicate that we couldn't figure out a package - * name; generic code will then try to guess the package from the file - * name. A return value of 1 would have meant that we figured out the - * package name and put it in bufPtr. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -int -TclGuessPackageName( - const char *fileName, /* Name of file containing package (already - * translated to local form if needed). */ - Tcl_DString *bufPtr) /* Initialized empty dstring. Append package - * name to this if possible. */ -{ - return 0; -} - -/* - * Local Variables: - * mode: c - * c-basic-offset: 4 - * fill-column: 78 - * End: - */ |