1 /* context_java - implementation of context switching for java threads */
3 /* Copyright (c) 2009, 2010. 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. */
10 #include <xbt/function_types.h>
11 #include <simix/simix.h>
12 #include "smx_context_java.h"
13 #include "xbt/dynar.h"
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(jmsg, bindings, "MSG for Java(TM)");
17 static smx_context_t my_current_context = NULL;
19 static smx_context_t smx_ctx_java_self(void);
21 smx_ctx_java_factory_create_context(xbt_main_func_t code, int argc,
23 void_pfn_smxprocess_t cleanup_func,
26 static void smx_ctx_java_free(smx_context_t context);
27 static void smx_ctx_java_start(smx_context_t context);
28 static void smx_ctx_java_suspend(smx_context_t context);
29 static void smx_ctx_java_resume(smx_context_t new_context);
30 static void smx_ctx_java_runall(xbt_dynar_t processes);
31 static void* smx_ctx_java_get_data(smx_context_t context);
33 void SIMIX_ctx_java_factory_init(smx_context_factory_t * factory)
35 /* instantiate the context factory */
36 smx_ctx_base_factory_init(factory);
38 (*factory)->create_context = smx_ctx_java_factory_create_context;
39 /* Leave default behavior of (*factory)->finalize */
40 (*factory)->free = smx_ctx_java_free;
41 (*factory)->stop = smx_ctx_java_stop;
42 (*factory)->suspend = smx_ctx_java_suspend;
43 (*factory)->runall = smx_ctx_java_runall;
44 (*factory)->name = "ctx_java_factory";
45 //(*factory)->finalize = smx_ctx_base_factory_finalize;
46 (*factory)->self = smx_ctx_java_self;
47 (*factory)->get_data = smx_ctx_base_get_data;
48 (*factory)->get_thread_id = smx_ctx_base_get_thread_id;
51 static smx_context_t smx_ctx_java_self(void)
53 return my_current_context;
56 static void* smx_ctx_java_get_data(smx_context_t context)
62 smx_ctx_java_factory_create_context(xbt_main_func_t code, int argc,
64 void_pfn_smxprocess_t cleanup_func,
67 XBT_DEBUG("XXXX Create Context\n");
68 smx_ctx_java_t context = xbt_new0(s_smx_ctx_java_t, 1);
70 /* If the user provided a function for the process then use it
71 otherwise is the context for maestro */
73 context->super.cleanup_func = cleanup_func;
74 context->jprocess = (jobject) code;
75 context->jenv = get_current_thread_env();
76 jprocess_start(((smx_ctx_java_t) context)->jprocess,
77 get_current_thread_env());
79 my_current_context = (smx_context_t)context;
81 context->super.data = data;
83 return (smx_context_t) context;
86 static void smx_ctx_java_free(smx_context_t context)
89 smx_ctx_java_t ctx_java = (smx_ctx_java_t) context;
91 if (ctx_java->jprocess) {
92 jobject jprocess = ctx_java->jprocess;
94 ctx_java->jprocess = NULL;
96 /* if the java process is alive join it */
97 if (jprocess_is_alive(jprocess, get_current_thread_env()))
98 jprocess_join(jprocess, get_current_thread_env());
102 smx_ctx_base_free(context);
105 void smx_ctx_java_stop(smx_context_t context)
107 jobject jprocess = NULL;
108 XBT_DEBUG("XXXX Context Stop\n");
110 smx_ctx_base_stop(context);
112 smx_ctx_java_t ctx_java;
114 ctx_java = (smx_ctx_java_t) context;
116 /*FIXME: is this really necessary? Seems to. */
117 if (my_current_context->iwannadie) {
118 XBT_INFO("I wannadie");
119 /* The maestro call xbt_context_stop() with an exit code set to one */
120 if (ctx_java->jprocess) {
121 /* if the java process is alive schedule it */
122 if (jprocess_is_alive(ctx_java->jprocess, get_current_thread_env())) {
123 jprocess_schedule(my_current_context);
124 jprocess = ctx_java->jprocess;
125 ctx_java->jprocess = NULL;
127 /* interrupt the java process */
128 jprocess_exit(jprocess, get_current_thread_env());
132 /* the java process exits */
133 jprocess = ctx_java->jprocess;
134 ctx_java->jprocess = NULL;
137 /* delete the global reference associated with the java process */
138 jprocess_delete_global_ref(jprocess, get_current_thread_env());
141 static void smx_ctx_java_suspend(smx_context_t context)
143 jprocess_unschedule(context);
146 // FIXME: inline those functions
147 static void smx_ctx_java_resume(smx_context_t new_context)
149 XBT_DEBUG("XXXX Context Resume\n");
150 jprocess_schedule(new_context);
153 static void smx_ctx_java_runall(xbt_dynar_t processes)
155 XBT_DEBUG("XXXX Run all\n");
156 smx_process_t process;
157 smx_context_t old_context;
160 xbt_dynar_foreach(processes, cursor, process) {
161 old_context = my_current_context;
162 my_current_context = SIMIX_process_get_context(process);
163 smx_ctx_java_resume(my_current_context);
164 my_current_context = old_context;
166 xbt_dynar_reset(processes);
168 XBT_DEBUG("XXXX End of run all\n");