--- /dev/null
+/* $Id$ */
+
+/* context_java - implementation of context switching for java threads */
+
+/* Copyright (c) 2007-2008 the SimGrid team. All right reserved */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+
+#include "xbt/function_types.h"
+#include "xbt/ex_interface.h"
+#include "xbt/xbt_context_private.h"
+#include "xbt/xbt_context_java.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(jmsg, "MSG for Java(TM)");
+
+/* callback: context fetching */
+static ex_ctx_t *xbt_ctx_java_ex_ctx(void);
+
+/* callback: termination */
+static void xbt_ctx_java_ex_terminate(xbt_ex_t * e);
+
+static xbt_context_t
+xbt_ctx_java_factory_create_context(const char *name, xbt_main_func_t code,
+ void_f_pvoid_t startup_func,
+ void *startup_arg,
+ void_f_pvoid_t cleanup_func,
+ void *cleanup_arg, int argc, char **argv);
+
+static int
+xbt_ctx_java_factory_create_maestro_context(xbt_context_t * maestro);
+
+static int xbt_ctx_java_factory_finalize(xbt_context_factory_t * factory);
+
+static void xbt_ctx_java_free(xbt_context_t context);
+
+static void xbt_ctx_java_kill(xbt_context_t context);
+
+static void xbt_ctx_java_schedule(xbt_context_t context);
+
+static void xbt_ctx_java_yield(void);
+
+static void xbt_ctx_java_start(xbt_context_t context);
+
+static void xbt_ctx_java_stop(int exit_code);
+
+static void xbt_ctx_java_swap(xbt_context_t context);
+
+static void xbt_ctx_java_schedule(xbt_context_t context);
+
+static void xbt_ctx_java_yield(void);
+
+static void xbt_ctx_java_suspend(xbt_context_t context);
+
+static void xbt_ctx_java_resume(xbt_context_t context);
+
+
+/* callback: context fetching */
+static ex_ctx_t *xbt_ctx_java_ex_ctx(void)
+{
+ return current_context->exception;
+}
+
+/* callback: termination */
+static void xbt_ctx_java_ex_terminate(xbt_ex_t * e)
+{
+ xbt_ex_display(e);
+ abort();
+}
+
+void xbt_ctx_java_factory_init(xbt_context_factory_t * factory)
+{
+ /* context exception handlers */
+ __xbt_ex_ctx = xbt_ctx_java_ex_ctx;
+ __xbt_ex_terminate = xbt_ctx_java_ex_terminate;
+
+ /* instantiate the context factory */
+ *factory = xbt_new0(s_xbt_context_factory_t, 1);
+
+ (*factory)->create_context = xbt_ctx_java_factory_create_context;
+ (*factory)->finalize = xbt_ctx_java_factory_finalize;
+ (*factory)->create_maestro_context = xbt_ctx_java_factory_create_maestro_context;
+ (*factory)->free = xbt_ctx_java_free;
+ (*factory)->kill = xbt_ctx_java_kill;
+ (*factory)->schedule = xbt_ctx_java_schedule;
+ (*factory)->yield = xbt_ctx_java_yield;
+ (*factory)->start = xbt_ctx_java_start;
+ (*factory)->stop = xbt_ctx_java_stop;
+ (*factory)->name = "ctx_java_factory";
+}
+
+static int
+xbt_ctx_java_factory_create_maestro_context(xbt_context_t * maestro)
+{
+ xbt_ctx_java_t context = xbt_new0(s_xbt_ctx_java_t, 1);
+
+ context->exception = xbt_new(ex_ctx_t, 1);
+ XBT_CTX_INITIALIZE(context->exception);
+
+ *maestro = (xbt_context_t) context;
+
+ return 0;
+}
+
+static int xbt_ctx_java_factory_finalize(xbt_context_factory_t * factory)
+{
+ free(maestro_context->exception);
+ free(*factory);
+ *factory = NULL;
+
+ return 0;
+}
+
+static xbt_context_t
+xbt_ctx_java_factory_create_context(const char *name, xbt_main_func_t code,
+ void_f_pvoid_t startup_func,
+ void *startup_arg,
+ void_f_pvoid_t cleanup_func,
+ void *cleanup_arg, int argc, char **argv)
+{
+ xbt_ctx_java_t context = xbt_new0(s_xbt_ctx_java_t, 1);
+
+ context->name = xbt_strdup(name);
+ context->cleanup_func = cleanup_func;
+ context->cleanup_arg = cleanup_arg;
+ context->exception = xbt_new(ex_ctx_t, 1);
+ XBT_CTX_INITIALIZE(context->exception);
+ context->jprocess = (jobject) startup_arg;
+ context->jenv = get_current_thread_env();
+
+ return (xbt_context_t) context;
+}
+
+static void xbt_ctx_java_free(xbt_context_t context)
+{
+ if (context) {
+ xbt_ctx_java_t ctx_java = (xbt_ctx_java_t) context;
+
+ free(ctx_java->name);
+
+ if (ctx_java->jprocess) {
+ jobject jprocess = ctx_java->jprocess;
+
+ ctx_java->jprocess = NULL;
+
+ /* if the java process is alive join it */
+ if (jprocess_is_alive(jprocess, get_current_thread_env()))
+ jprocess_join(jprocess, get_current_thread_env());
+ }
+
+ if (ctx_java->exception)
+ free(ctx_java->exception);
+
+ free(context);
+ context = NULL;
+ }
+}
+
+static void xbt_ctx_java_kill(xbt_context_t context)
+{
+ context->iwannadie = 1;
+ xbt_ctx_java_swap(context);
+}
+
+/**
+ * \param context the winner
+ *
+ * Calling this function blocks the current context and schedule \a context.
+ * When \a context will call xbt_context_yield, it will return
+ * to this function as if nothing had happened.
+ *
+ * Only the maestro can call this function to run a given process.
+ */
+static void xbt_ctx_java_schedule(xbt_context_t context)
+{
+ xbt_assert0((current_context == maestro_context),
+ "You are not supposed to run this function here!");
+ xbt_ctx_java_swap(context);
+}
+
+/**
+ * Calling this function makes the current context yield. The context
+ * that scheduled it returns from xbt_context_schedule as if nothing
+ * had happened.
+ *
+ * Only the processes can call this function, giving back the control
+ * to the maestro
+ */
+static void xbt_ctx_java_yield(void)
+{
+ xbt_assert0((current_context != maestro_context),
+ "You are not supposed to run this function here!");
+ jprocess_unschedule(current_context);
+}
+
+static void xbt_ctx_java_start(xbt_context_t context)
+{
+ jprocess_start(((xbt_ctx_java_t) context)->jprocess,
+ get_current_thread_env());
+}
+
+static void xbt_ctx_java_stop(int exit_code)
+{
+ jobject jprocess = NULL;
+
+ xbt_ctx_java_t ctx_java;
+
+ if (current_context->cleanup_func)
+ (*(current_context->cleanup_func)) (current_context->cleanup_arg);
+
+ xbt_swag_remove(current_context, context_living);
+ xbt_swag_insert(current_context, context_to_destroy);
+
+ ctx_java = (xbt_ctx_java_t) current_context;
+
+ if (ctx_java->iwannadie) {
+ /* The maestro call xbt_context_stop() with an exit code set to one */
+ if (ctx_java->jprocess) {
+ /* if the java process is alive schedule it */
+ if (jprocess_is_alive(ctx_java->jprocess, get_current_thread_env())) {
+ jprocess_schedule(current_context);
+ jprocess = ctx_java->jprocess;
+ ctx_java->jprocess = NULL;
+
+ /* interrupt the java process */
+ jprocess_exit(jprocess, get_current_thread_env());
+
+ }
+ }
+ } else {
+ /* the java process exits */
+ jprocess = ctx_java->jprocess;
+ ctx_java->jprocess = NULL;
+ }
+
+ /* delete the global reference associated with the java process */
+ jprocess_delete_global_ref(jprocess, get_current_thread_env());
+}
+
+static void xbt_ctx_java_swap(xbt_context_t context)
+{
+ if (context) {
+ xbt_context_t self = current_context;
+
+ current_context = context;
+
+ jprocess_schedule(context);
+
+ current_context = self;
+ }
+
+ if (current_context->iwannadie)
+ xbt_ctx_java_stop(1);
+}
