X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/b558f9b18c938af6a35ebea66ac2323a60178202..1283307f26e739e654d195f81cceee5ce1683d99:/simgrid-java/src/smx_context_cojava.c diff --git a/simgrid-java/src/smx_context_cojava.c b/simgrid-java/src/smx_context_cojava.c deleted file mode 100644 index 00fe9b5db4..0000000000 --- a/simgrid-java/src/smx_context_cojava.c +++ /dev/null @@ -1,281 +0,0 @@ -/* context_cojava - implementation of context switching for java coroutines */ - -/* Copyright 2012. The SimGrid Team. - * All rights 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 -#include -#include -#include "smx_context_cojava.h" -#include "jxbt_utilities.h" -#include "xbt/dynar.h" - - -//Coroutine methodID/class cache. -jclass coclass; -jmethodID coroutine_init; -jmethodID coroutine_yield; -jmethodID coroutine_yieldTo; -jmethodID coroutine_stop; -//Maestro java coroutine -jobject cojava_maestro_coroutine; - -JNIEnv *global_env; - -static smx_context_t my_current_context = NULL; -static smx_context_t maestro_context = NULL; - - -xbt_dynar_t cojava_processes; -static unsigned long int cojava_process_index = 0; - -extern JavaVM *__java_vm; - -XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(jmsg); - - -static smx_context_t -smx_ctx_cojava_factory_create_context(xbt_main_func_t code, int argc, - char **argv, - void_pfn_smxprocess_t cleanup_func, - void *data); - -static void smx_ctx_cojava_free(smx_context_t context); -static void smx_ctx_cojava_start(smx_context_t context); -static void smx_ctx_cojava_suspend(smx_context_t context); -static void smx_ctx_cojava_resume(smx_context_t new_context); -static void smx_ctx_cojava_runall(void); -static void* smx_ctx_cojava_run(void *data); -static void smx_ctx_cojava_create_coroutine(smx_ctx_cojava_t context); -void SIMIX_ctx_cojava_factory_init(smx_context_factory_t * factory) -{ - /* instantiate the context factory */ - smx_ctx_base_factory_init(factory); - - (*factory)->create_context = smx_ctx_cojava_factory_create_context; - /* Leave default behavior of (*factory)->finalize */ - (*factory)->free = smx_ctx_cojava_free; - (*factory)->stop = smx_ctx_cojava_stop; - (*factory)->suspend = smx_ctx_cojava_suspend; - (*factory)->runall = smx_ctx_cojava_runall; - (*factory)->name = "ctx_cojava_factory"; - //(*factory)->finalize = smx_ctx_base_factory_finalize; - (*factory)->self = smx_ctx_cojava_self; - (*factory)->get_data = smx_ctx_base_get_data; - - global_env = get_current_thread_env(); - - coclass = (*global_env)->FindClass(global_env, "java/dyn/Coroutine"); - xbt_assert((coclass != NULL), "Can't find java.dyn.Coroutine class."); - //Cache the method id we are going to use - coroutine_init = (*global_env)->GetMethodID(global_env, coclass, "", "(Ljava/lang/Runnable;)V"); - xbt_assert((coroutine_init != NULL), "Can't find "); - coroutine_stop = (*global_env)->GetMethodID(global_env, coclass, "stop", "()V"); - xbt_assert((coroutine_stop != NULL), "Method not found..."); - coroutine_yield = (*global_env)->GetStaticMethodID(global_env, coclass, "yield", "()V"); - xbt_assert((coroutine_yield != NULL), "Method yield not found."); - coroutine_yieldTo = (*global_env)->GetStaticMethodID(global_env, coclass, "yieldTo", "(Ljava/dyn/Coroutine;)V"); - xbt_assert((coroutine_yieldTo != NULL), "Method yieldTo not found."); - - jclass class_thread = (*global_env)->FindClass(global_env, "java/lang/Thread"); - xbt_assert((class_thread != NULL), "Can't find java.lang.Thread class"); - - jclass class_coroutine_support = (*global_env)->FindClass(global_env, "java/dyn/CoroutineSupport"); - xbt_assert((class_coroutine_support != NULL), "Can't find java.dyn.CoroutineSupport class"); - jmethodID thread_get_current = (*global_env)->GetStaticMethodID(global_env, class_thread, "currentThread", "()Ljava/lang/Thread;"); - xbt_assert((thread_get_current != NULL), "Can't find Thread.currentThread() method."); - - /** - * Retrieve maetro coroutine object - */ - jobject jthread; - jthread = (*global_env)->CallStaticObjectMethod(global_env, class_thread, thread_get_current); - xbt_assert((jthread != NULL), "Can't find current thread."); - - jmethodID thread_get_coroutine_support = (*global_env)->GetMethodID(global_env, class_thread, "getCoroutineSupport", "()Ljava/dyn/CoroutineSupport;"); - xbt_assert((thread_get_coroutine_support != NULL), "Can't find Thread.getCoroutineSupport method"); - - jobject jcoroutine_support; - jcoroutine_support = (*global_env)->CallObjectMethod(global_env, jthread, thread_get_coroutine_support); - xbt_assert((jcoroutine_support != NULL), "Can't find coroutine support object"); - //FIXME ? Be careful, might change in the implementation (we are relying on private fields, so...). - jfieldID coroutine_support_thread_coroutine = (*global_env)->GetFieldID(global_env, class_coroutine_support, "threadCoroutine", "Ljava/dyn/Coroutine;"); - xbt_assert((coroutine_support_thread_coroutine != NULL), "Can't find threadCoroutine field"); - cojava_maestro_coroutine = (jobject)(*global_env)->GetObjectField(global_env, jcoroutine_support, coroutine_support_thread_coroutine); - xbt_assert((cojava_maestro_coroutine != NULL), "Can't find the thread coroutine."); - cojava_maestro_coroutine = (*global_env)->NewGlobalRef(global_env, cojava_maestro_coroutine); - xbt_assert((cojava_maestro_coroutine != NULL), "Can't get a global reference to the thread coroutine."); -} -smx_context_t smx_ctx_cojava_self(void) -{ - return my_current_context; -} - -static smx_context_t -smx_ctx_cojava_factory_create_context(xbt_main_func_t code, int argc, - char **argv, - void_pfn_smxprocess_t cleanup_func, - void* data) -{ - smx_ctx_cojava_t context = xbt_new0(s_smx_ctx_cojava_t, 1); - /* If the user provided a function for the process then use it - otherwise is the context for maestro */ - if (code) { - if (argc == 0) { - context->jprocess = (jobject) code; - } - else { - context->jprocess = NULL; - } - context->super.cleanup_func = cleanup_func; - - context->super.argc = argc; - context->super.argv = argv; - context->super.code = code; - - smx_ctx_cojava_run(context); - } - else { - context->jcoroutine = NULL; - my_current_context = (smx_context_t)context; - maestro_context = (smx_context_t)context; - } - context->bound = 0; - context->super.data = data; - return (smx_context_t) context; -} - -static void* smx_ctx_cojava_run(void *data) { - smx_ctx_cojava_t context = (smx_ctx_cojava_t)data; - my_current_context = (smx_context_t)context; - //Create the "Process" object if needed. - if (context->super.argc <= 0) { - smx_ctx_cojava_create_coroutine(context); - } - my_current_context = maestro_context; - return NULL; -} -static void smx_ctx_cojava_free(smx_context_t context) -{ - if (context) { - smx_ctx_cojava_t ctx_java = (smx_ctx_cojava_t) context; - if (ctx_java->jcoroutine) { /* We are not in maestro context */ - JNIEnv *env = get_current_thread_env(); - (*env)->DeleteGlobalRef(env, ctx_java->jcoroutine); - (*env)->DeleteGlobalRef(env, ctx_java->jprocess); - } - } - smx_ctx_base_free(context); -} - - -void smx_ctx_cojava_stop(smx_context_t context) -{ - /* - * The java stack needs to be empty, otherwise weird stuff - * will happen - */ - if (context->iwannadie) { - context->iwannadie = 0; - JNIEnv *env = get_current_thread_env(); - jxbt_throw_by_name(env, "org/simgrid/msg/ProcessKilledError", bprintf("Process killed :)")); - THROWF(cancel_error, 0, "process cancelled"); - } - else { - smx_ctx_base_stop(context); - smx_ctx_cojava_suspend(context); - } -} - -static void smx_ctx_cojava_suspend(smx_context_t context) -{ - smx_context_t previous_context = context; - unsigned long int i = cojava_process_index++; - jobject next_coroutine; - - if (i < xbt_dynar_length(cojava_processes)) { - smx_context_t next_context = SIMIX_process_get_context(xbt_dynar_get_as( - cojava_processes,i, smx_process_t)); - my_current_context = next_context; - XBT_DEBUG("Switching to %p",my_current_context); - smx_ctx_cojava_t java_context = (smx_ctx_cojava_t)(next_context); - if (!java_context->jprocess) { - (*(java_context->super.code))(java_context->super.argc, java_context->super.argv); - smx_ctx_cojava_create_coroutine(java_context); - } - else if (!java_context->bound) { - java_context->bound = 1; - smx_process_t process = SIMIX_process_self(); - (*global_env)->SetLongField(global_env, java_context->jprocess, jprocess_field_Process_bind, (jlong)process); - } - - next_coroutine = java_context->jcoroutine; - } - else { - //Give maestro the control back. - next_coroutine = cojava_maestro_coroutine; - my_current_context = maestro_context; - } - (*global_env)->CallStaticVoidMethod(global_env, coclass, coroutine_yieldTo, next_coroutine); - my_current_context = previous_context; -} - -static void smx_ctx_cojava_resume(smx_context_t new_context) { - my_current_context = new_context; - smx_ctx_cojava_t java_context = (smx_ctx_cojava_t)(new_context); - - if (!java_context->jprocess) { - (*(java_context->super.code))(java_context->super.argc, java_context->super.argv); - smx_ctx_cojava_create_coroutine(java_context); - java_context->bound = 1; - } - else if (!java_context->bound) { - java_context->bound = 1; - smx_process_t process = SIMIX_process_self(); - (*global_env)->SetLongField(global_env, java_context->jprocess, jprocess_field_Process_bind, (jlong)process); - } - (*global_env)->CallStaticVoidMethod(global_env, coclass, coroutine_yieldTo, java_context->jcoroutine); -} - -static void smx_ctx_cojava_runall(void) -{ - cojava_processes = SIMIX_process_get_runnable(); - smx_process_t process; - if (xbt_dynar_length(cojava_processes) > 0) { - process = xbt_dynar_get_as(cojava_processes, 0, smx_process_t); - cojava_process_index = 1; - /* Execute the first process */ - smx_ctx_cojava_resume(SIMIX_process_get_context(process)); - } -} - -static void smx_ctx_cojava_create_coroutine(smx_ctx_cojava_t context) { - JNIEnv *env = get_current_thread_env(); - jclass coclass = (*env)->FindClass(env, "java/dyn/Coroutine"); - xbt_assert((coclass != NULL), "Can't find coroutine class ! :("); - jobject jcoroutine = (*env)->NewObject(env, coclass, coroutine_init, context->jprocess); - if (jcoroutine == NULL) { - FILE *conf= fopen("/proc/sys/vm/max_map_count","r"); - if (conf) { - int limit=-1; - fscanf(conf,"%d",&limit); - fclose(conf); - if (limit!=-1 && SIMIX_process_count() > (limit - 100) /2) - xbt_die("Error while creating a new coroutine. " - "This seem due to the the vm.max_map_count system limit that is only equal to %d while we already have %d coroutines. " - "Please check the install documentation to see how to increase this limit", limit, SIMIX_process_count()); - if (limit == -1) - xbt_die("Error while creating a new coroutine. " - "This seems to be a non-linux system, disabling the automatic verification that the system limit on the amount of memory maps is high enough."); - xbt_die("Error while creating a new coroutine. "); - } - - } - - jcoroutine = (*env)->NewGlobalRef(env, jcoroutine); - context->jcoroutine = jcoroutine; -}