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 "smx_context_java.h"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(jmsg, bindings, "MSG for Java(TM)");
16 smx_ctx_java_factory_create_context(xbt_main_func_t code, int argc,
18 void_pfn_smxprocess_t cleanup_func,
19 smx_process_t process);
21 static void smx_ctx_java_free(smx_context_t context);
22 static void smx_ctx_java_start(smx_context_t context);
23 static void smx_ctx_java_stop(smx_context_t context);
24 static void smx_ctx_java_suspend(smx_context_t context);
25 static void smx_ctx_java_resume(smx_context_t new_context);
26 static void smx_ctx_java_runall(xbt_swag_t processes);
28 void SIMIX_ctx_java_factory_init(smx_context_factory_t * factory)
30 /* instantiate the context factory */
31 smx_ctx_base_factory_init(factory);
33 (*factory)->create_context = smx_ctx_java_factory_create_context;
34 /* Leave default behavior of (*factory)->finalize */
35 (*factory)->free = smx_ctx_java_free;
36 (*factory)->stop = smx_ctx_java_stop;
37 (*factory)->suspend = smx_ctx_java_suspend;
38 (*factory)->runall = smx_ctx_java_runall;
39 (*factory)->name = "ctx_java_factory";
43 smx_ctx_java_factory_create_context(xbt_main_func_t code, int argc,
45 void_pfn_smxprocess_t cleanup_func,
46 smx_process_t process)
48 smx_ctx_java_t context = xbt_new0(s_smx_ctx_java_t, 1);
50 /* If the user provided a function for the process then use it
51 otherwise is the context for maestro */
53 context->super.cleanup_func = cleanup_func;
54 context->super.process = process;
55 context->jprocess = (jobject) code;
56 context->jenv = get_current_thread_env();
57 jprocess_start(((smx_ctx_java_t) context)->jprocess,
58 get_current_thread_env());
61 return (smx_context_t) context;
64 static void smx_ctx_java_free(smx_context_t context)
67 smx_ctx_java_t ctx_java = (smx_ctx_java_t) context;
69 if (ctx_java->jprocess) {
70 jobject jprocess = ctx_java->jprocess;
72 ctx_java->jprocess = NULL;
74 /* if the java process is alive join it */
75 if (jprocess_is_alive(jprocess, get_current_thread_env()))
76 jprocess_join(jprocess, get_current_thread_env());
80 smx_ctx_base_free(context);
83 static void smx_ctx_java_stop(smx_context_t context)
85 jobject jprocess = NULL;
87 smx_ctx_java_t ctx_java;
89 if (context->cleanup_func)
90 (*(context->cleanup_func)) (context->process);
92 ctx_java = (smx_ctx_java_t) context;
94 /*FIXME: is this really necessary? */
95 if (simix_global->current_process->iwannadie) {
96 /* The maestro call xbt_context_stop() with an exit code set to one */
97 if (ctx_java->jprocess) {
98 /* if the java process is alive schedule it */
99 if (jprocess_is_alive(ctx_java->jprocess, get_current_thread_env())) {
100 jprocess_schedule(simix_global->current_process->context);
101 jprocess = ctx_java->jprocess;
102 ctx_java->jprocess = NULL;
104 /* interrupt the java process */
105 jprocess_exit(jprocess, get_current_thread_env());
110 /* the java process exits */
111 jprocess = ctx_java->jprocess;
112 ctx_java->jprocess = NULL;
115 /* delete the global reference associated with the java process */
116 jprocess_delete_global_ref(jprocess, get_current_thread_env());
119 /*static void smx_ctx_java_swap(smx_context_t context)
122 smx_context_t self = current_context;
124 current_context = context;
126 jprocess_schedule(context);
128 current_context = self;
131 if (current_context->iwannadie)
132 smx_ctx_java_stop(1);
135 static void smx_ctx_java_suspend(smx_context_t context)
137 jprocess_unschedule(context);
140 // FIXME: inline those functions
141 static void smx_ctx_java_resume(smx_context_t new_context)
143 jprocess_schedule(new_context);
146 static void smx_ctx_java_runall(xbt_swag_t processes)
148 smx_process_t process;
149 while((process = xbt_swag_extract(processes))){
150 simix_global->current_process = process;
151 smx_ctx_java_resume(process->context);
152 simix_global->current_process = simix_global->maestro_process;