src/xbt/xbt_context_private.h

   1 /* a fast and simple context switching library                              */
   2
   3 /* Copyright (c) 2004-2008 the SimGrid team.                                */
   4 /* All rights reserved.                                                     */
   5
   6 /* This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the license (GNU LGPL) which comes with this package. */
   8
   9 #ifndef _XBT_CONTEXT_PRIVATE_H
  10 #define _XBT_CONTEXT_PRIVATE_H
  11
  12 #include "xbt/sysdep.h"
  13 #include "xbt/context.h"
  14 #include "xbt/swag.h"
  15
  16 SG_BEGIN_DECL()
  17
  18 /* *********************** */
  19 /* Context type definition */
  20 /* *********************** */
  21 /* the following function pointers describe the interface that all context concepts must implement */
  22      typedef void (*xbt_pfn_context_free_t) (xbt_context_t);    /* pointer type to the function used to destroy the specified context   */
  23      typedef void (*xbt_pfn_context_kill_t) (xbt_context_t);    /* pointer type to the function used to kill the specified context              */
  24      typedef void (*xbt_pfn_context_schedule_t) (xbt_context_t);        /* pointer type to the function used to resume the specified context    */
  25      typedef void (*xbt_pfn_context_yield_t) (void);    /* pointer type to the function used to yield the specified context             */
  26      typedef void (*xbt_pfn_context_start_t) (xbt_context_t);   /* pointer type to the function used to start the specified context             */
  27      typedef void (*xbt_pfn_context_stop_t) (int);      /* pointer type to the function used to stop the current context                */
  28
  29 /* each context type must contain this macro at its begining -- OOP in C :/ */
  30 #define XBT_CTX_BASE_T \
  31         s_xbt_swag_hookup_t hookup; \
  32         char *name; \
  33         void_f_pvoid_t cleanup_func; \
  34         void *cleanup_arg; \
  35         ex_ctx_t *exception; \
  36         int iwannadie; \
  37         xbt_main_func_t code; \
  38         int argc; \
  39         char **argv; \
  40         void_f_pvoid_t startup_func; \
  41         void *startup_arg; \
  42         xbt_pfn_context_free_t free; \
  43         xbt_pfn_context_kill_t kill; \
  44         xbt_pfn_context_schedule_t schedule; \
  45         xbt_pfn_context_yield_t yield; \
  46         xbt_pfn_context_start_t start; \
  47         xbt_pfn_context_stop_t stop
  48
  49 /* all other context types derive from this structure */
  50      typedef struct s_xbt_context {
  51        XBT_CTX_BASE_T;
  52      } s_xbt_context_t;
  53
  54 /* ****************** */
  55 /* Globals definition */
  56 /* ****************** */
  57
  58 /* Important guys */
  59      extern xbt_context_t current_context;
  60      extern xbt_context_t maestro_context;
  61
  62 /* All dudes lists */
  63      extern xbt_swag_t context_living;
  64      extern xbt_swag_t context_to_destroy;
  65
  66 /* *********************** */
  67 /* factory type definition */
  68 /* *********************** */
  69      typedef struct s_xbt_context_factory *xbt_context_factory_t;
  70
  71 /* this function describes the interface that all context factory must implement */
  72      typedef xbt_context_t(*xbt_pfn_context_factory_create_context_t) (const
  73                                                                        char *,
  74                                                                        xbt_main_func_t,
  75                                                                        void_f_pvoid_t,
  76                                                                        void *,
  77                                                                        void_f_pvoid_t,
  78                                                                        void *,
  79                                                                        int,
  80                                                                        char
  81                                                                        **);
  82      typedef
  83        int (*xbt_pfn_context_factory_create_maestro_context_t) (xbt_context_t
  84                                                                 *);
  85
  86 /* this function finalize the specified context factory */
  87      typedef int (*xbt_pfn_context_factory_finalize_t) (xbt_context_factory_t
  88                                                         *);
  89
  90 /* this interface is used by the xbt context module to create the appropriate concept */
  91      typedef struct s_xbt_context_factory {
  92        xbt_pfn_context_factory_create_maestro_context_t create_maestro_context; /* create the context of the maestro    */
  93        xbt_pfn_context_factory_create_context_t create_context; /* create a new context                 */
  94        xbt_pfn_context_factory_finalize_t finalize;     /* finalize the context factory         */
  95        const char *name;        /* the name of the context factory      */
  96
  97      } s_xbt_context_factory_t;
  98
  99 /**
 100  * This function select a context factory associated with the name specified by
 101  * the parameter name.
 102  * If successful the function returns 0. Otherwise the function returns the error
 103  * code.
 104  */
 105      int
 106        xbt_context_select_factory(const char *name);
 107
 108 /**
 109  * This function initialize a context factory from the name specified by the parameter
 110  * name.
 111  * If the factory cannot be found, an exception is raised.
 112  */
 113      void
 114
 115        xbt_context_init_factory_by_name(xbt_context_factory_t * factory,
 116                                         const char *name);
 117
 118
 119 /* All factories init */
 120      void xbt_ctx_thread_factory_init(xbt_context_factory_t * factory);
 121      void xbt_ctx_sysv_factory_init(xbt_context_factory_t * factory);
 122      void xbt_ctx_java_factory_init(xbt_context_factory_t * factory);
 123
 124
 125
 126
 127
 128 SG_END_DECL()
 129 #endif /* !_XBT_CONTEXT_PRIVATE_H */