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.
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
