Load(3tcl) Tcl Library Procedures Load(3tcl)
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NAME
Tcl_LoadFile, Tcl_FindSymbol - platform-independent dynamic library
loading
SYNOPSIS
#include <tcl.h>
int
Tcl_LoadFile(interp, pathPtr, symbols, flags, procPtrs, loadHandlePtr)
void *
Tcl_FindSymbol(interp, loadHandle, symbol)
ARGUMENTS
Tcl_Interp *interp (in) Interpreter to use for report-
ing error messages.
Tcl_Obj *pathPtr (in) The name of the file to load.
If it is a single name, the li-
brary search path of the cur-
rent environment will be used
to resolve it.
const char *const symbols[] (in) Array of names of symbols to be
resolved during the load of the
library, or NULL if no symbols
are to be resolved. If an array
is given, the last entry in the
array must be NULL.
int flags (in) The value should normally be 0,
but TCL_LOAD_GLOBAL or
TCL_LOAD_LAZY or a combination
of those two is allowed as
well.
void *procPtrs (out) Points to an array that will
hold the addresses of the func-
tions described in the symbols
argument. Should be NULL if no
symbols are to be resolved.
Tcl_LoadHandle *loadHandlePtr (out) Points to a variable that will
hold the handle to the abstract
token describing the library
that has been loaded.
Tcl_LoadHandle loadHandle (in) Abstract token describing the
library to look up a symbol in.
const char *symbol (in) The name of the symbol to look
up.
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DESCRIPTION
Tcl_LoadFile loads a file from the filesystem (including potentially
any virtual filesystem that has been installed) and provides a handle
to it that may be used in further operations. The symbols array, if
non-NULL, supplies a set of names of symbols (typically functions) that
must be resolved from the library and which will be stored in the array
indicated by procPtrs. If any of the symbols is not resolved, the load-
ing of the file will fail with an error message left in the interpreter
(if that is non-NULL). The result of Tcl_LoadFile is a standard Tcl
error code. The library may be unloaded with Tcl_FSUnloadFile.
Tcl_FindSymbol locates a symbol in a loaded library and returns it. If
the symbol cannot be found, it returns NULL and sets an error message
in the given interp (if that is non-NULL). Note that it is unsafe to
use this operation on a handle that has been passed to Tcl_FSUnload-
File.
SEE ALSO
Tcl_FSLoadFile(3tcl), Tcl_FSUnloadFile(3tcl), load(3tcl), unload(3tcl)
KEYWORDS
binary code, loading, shared library
Tcl 8.6 Load(3tcl)
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