1 /* a fast and simple context switching library */
3 /* Copyright (c) 2004-2008 the SimGrid team. */
4 /* All rights reserved. */
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. */
9 #ifndef _XBT_CONTEXT_PRIVATE_H
10 #define _XBT_CONTEXT_PRIVATE_H
12 #include "xbt/sysdep.h"
13 #include "simix/context.h"
18 /* *********************** */
19 /* Context type definition */
20 /* *********************** */
21 /* the following function pointers types describe the interface that all context
22 concepts must implement */
24 typedef void (*xbt_pfn_context_free_t) (xbt_context_t); /* function used to destroy the specified context */
26 typedef void (*xbt_pfn_context_kill_t) (xbt_context_t); /* function used to kill the specified context */
28 typedef void (*xbt_pfn_context_schedule_t) (xbt_context_t); /* function used to resume the specified context */
30 typedef void (*xbt_pfn_context_yield_t) (void); /* function used to yield the specified context */
32 typedef void (*xbt_pfn_context_start_t) (xbt_context_t); /* function used to start the specified context */
34 typedef void (*xbt_pfn_context_stop_t) (int); /* function used to stop the current context */
36 /* each context type must contain this macro at its begining -- OOP in C :/ */
37 #define XBT_CTX_BASE_T \
38 s_xbt_swag_hookup_t hookup; \
40 void_f_pvoid_t cleanup_func; \
42 ex_ctx_t *exception; \
44 xbt_main_func_t code; \
47 void_f_pvoid_t startup_func; \
49 xbt_pfn_context_free_t free; \
50 xbt_pfn_context_kill_t kill; \
51 xbt_pfn_context_schedule_t schedule; \
52 xbt_pfn_context_yield_t yield; \
53 xbt_pfn_context_start_t start; \
54 xbt_pfn_context_stop_t stop
56 /* all other context types derive from this structure */
57 typedef struct s_xbt_context {
61 /* ****************** */
62 /* Globals definition */
63 /* ****************** */
66 extern xbt_context_t current_context;
67 extern xbt_context_t maestro_context;
70 extern xbt_swag_t context_living;
71 extern xbt_swag_t context_to_destroy;
73 /* *********************** */
74 /* factory type definition */
75 /* *********************** */
77 typedef struct s_xbt_context_factory *xbt_context_factory_t;
79 /* The following function pointer types describe the interface that any context
80 factory should implement */
82 /* function used to create a new context */
83 typedef xbt_context_t (*xbt_pfn_context_factory_create_context_t)
84 (const char *, xbt_main_func_t, void_f_pvoid_t, void *, void_f_pvoid_t, void *, int, char **);
86 /* function used to create the context for the maestro process */
87 typedef int (*xbt_pfn_context_factory_create_maestro_context_t) (xbt_context_t*);
89 /* this function finalize the specified context factory */
90 typedef int (*xbt_pfn_context_factory_finalize_t) (xbt_context_factory_t*);
92 /* interface of the context factories */
93 typedef struct s_xbt_context_factory {
94 xbt_pfn_context_factory_create_maestro_context_t create_maestro_context;
95 xbt_pfn_context_factory_create_context_t create_context;
96 xbt_pfn_context_factory_finalize_t finalize;
98 } s_xbt_context_factory_t;
100 /* Selects a context factory associated with the name specified by the parameter name.
101 * If successful the function returns 0. Otherwise the function returns the error code.
103 int xbt_context_select_factory(const char *name);
105 /* Initializes a context factory from the name specified by the parameter name.
106 * If the factory cannot be found, an exception is raised.
108 void xbt_context_init_factory_by_name(xbt_context_factory_t * factory, const char *name);
110 /* All factories init */
111 void xbt_ctx_thread_factory_init(xbt_context_factory_t * factory);
113 void xbt_ctx_sysv_factory_init(xbt_context_factory_t * factory);
115 void xbt_ctx_java_factory_init(xbt_context_factory_t * factory);
118 #endif /* !_XBT_CONTEXT_PRIVATE_H */