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 reporting error messages.

       Tcl_Obj *pathPtr (in)                   The name of the file to load. If it is a single name, the library
                                               search path of the current 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  functions
                                               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
       loading  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_FSUnloadFile.

SEE ALSO

       Tcl_FSLoadFile(3tcl), Tcl_FSUnloadFile(3tcl), load(3tcl), unload(3tcl)

KEYWORDS

       binary code, loading, shared library