GNU/Linux man pages
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GNU/Linux |
RedHat 5.2(Apollo) |
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Tcl_Main(3) |
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Tcl_Main − main program for Tcl-based applications
#include <tcl.h>
Tcl_Main(argc, argv, appInitProc)
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int argc (in) |
Number of elements in argv. | ||
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char *argv[] (in) |
Array of strings containing command-line arguments. | ||
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Tcl_AppInitProc *appInitProc (in) |
Address of an application-specific initialization procedure. The value for this argument is usually Tcl_AppInit. |
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Tcl_Main acts as the main program for most Tcl-based applications. Starting with Tcl 7.4 it is not called main anymore because it is part of the Tcl library and having a function main in a library (particularly a shared library) causes problems on many systems. Having main in the Tcl library would also make it hard to use Tcl in C++ programs, since C++ programs must have special C++ main functions.
Normally each application contains a small main function that does nothing but invoke Tcl_Main. Tcl_Main then does all the work of creating and running a tclsh-like application.
When it is has finished its own initialization, but before it processes commands, Tcl_Main calls the procedure given by the appInitProc argument. This procedure provides a ’’hook’’ for the application to perform its own initialization, such as defining application-specific commands. The procedure must have an interface that matches the type Tcl_AppInitProc:
typedef int Tcl_AppInitProc(Tcl_Interp *interp);
AppInitProc is almost always a pointer to Tcl_AppInit; for more details on this procedure, see the documentation for Tcl_AppInit.
application-specific initialization, command-line arguments, main program
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Tcl_Main(3) | |