1 /* gras/process.h - Manipulating data related to an host. */
3 /* Copyright (c) 2003, 2004 Martin Quinson. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include "xbt/misc.h" /* SG_BEGIN_DECL */
16 void gras_agent_spawn(const char *name, void *data, xbt_main_func_t code,
17 int argc, char *argv[], xbt_dict_t properties);
20 /****************************************************************************/
21 /* Manipulating User Data */
22 /****************************************************************************/
24 /** \addtogroup GRAS_globals
25 * \brief Handling global variables so that it works on simulator.
27 * In GRAS, using globals is forbidden since the "processes" will
28 * sometimes run as a thread inside the same process (namely, in
29 * simulation mode). So, you have to put all globals in a structure, and
32 * Use the \ref gras_userdata_new macro to create a new user data (or malloc it
33 * and use \ref gras_userdata_set yourself), and \ref gras_userdata_get to
34 * retrieve a reference to it.
37 * For more info on this, you may want to check the relevant lesson of the GRAS tutorial:
38 * \ref GRAS_tut_tour_globals
43 * \brief Get the data associated with the current process.
44 * \ingroup GRAS_globals
46 XBT_PUBLIC(void *) gras_userdata_get(void);
49 * \brief Set the data associated with the current process.
50 * \ingroup GRAS_globals
52 XBT_PUBLIC(void *) gras_userdata_set(void *ud);
54 /** \brief Malloc and set the data associated with the current process.
56 * @warning gras_userdata_new() expects the pointed type, not the
57 * pointer type. We know it'a a bit troublesome, but it seems like
58 * the only solution since this macro has to compute the size to
59 * malloc and should thus know the pointed type.
61 * You'll find an example in the tutorial: \ref GRAS_tut_tour_globals
63 #define gras_userdata_new(type) ((type*)gras_userdata_set(xbt_new0(type,1)))
67 #endif /* GRAS_PROCESS_H */