1 //=======================================================================
5 // Support for startup of ISO C environment
7 //========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
15 // Software Foundation; either version 2 or (at your option) any later version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): jlarmour
50 //####DESCRIPTIONEND####
52 //========================================================================
56 #include <pkgconf/system.h> // CYGPKG_KERNEL
57 #include <pkgconf/libc_startup.h> // Configuration header
61 #include <cyg/infra/cyg_type.h> // Common type definitions and support
62 #include <cyg/infra/cyg_trac.h> // Common tracing support
65 # include <pkgconf/kernel.h> // eCos kernel configuration
66 # include <cyg/kernel/thread.hxx> // eCos thread support
67 # include <cyg/kernel/thread.inl>
71 // FUNCTION PROTOTYPES
74 cyg_libc_invoke_main( CYG_ADDRWORD );
78 #ifdef CYGSEM_LIBC_STARTUP_MAIN_THREAD
79 extern Cyg_Thread cyg_libc_main_thread;
84 cyg_iso_c_start( void )
86 static int initialized=0;
88 CYG_REPORT_FUNCNAME( "cyg_iso_c_start" );
89 CYG_REPORT_FUNCARGVOID();
91 if (initialized++ == 0) {
92 CYG_TRACE0( true, "Resuming cyg_libc_main_thread" );
93 cyg_libc_main_thread.resume();
97 } // cyg_iso_c_start()
99 // define an object that will automatically call cyg_iso_c_start()
101 class cyg_libc_startup_dummy_constructor_class {
103 cyg_libc_startup_dummy_constructor_class() { cyg_iso_c_start(); }
106 static cyg_libc_startup_dummy_constructor_class cyg_libc_startup_obj
107 CYGBLD_ATTRIB_INIT_PRI(CYG_INIT_LIBC);
109 #elif defined( CYGSEM_LIBC_STARTUP_MAIN_INITCONTEXT )
111 // otherwise replace the default cyg_user_start(), but of course keep
112 // it a weak symbol in case the user wants to override
115 cyg_user_start(void) CYGBLD_ATTRIB_WEAK;
120 cyg_libc_invoke_main(0);
124 cyg_iso_c_start( void )
126 static int initialized=0;
128 CYG_REPORT_FUNCNAME( "cyg_iso_c_start" );
129 CYG_REPORT_FUNCARGVOID();
131 // In case they want to explicitly invoke the C library from
132 // cyg_user_start() themselves
133 if (initialized++ == 0) {
134 cyg_libc_invoke_main(0);
141 cyg_iso_c_start( void ) {}