-/* $Id$ */
+//* $Id$ */
/* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved. */
#include "private.h"
#include "xbt/sysdep.h"
#include "xbt/log.h"
+#include "xbt/dict.h"
+#include "msg/mailbox.h"
+
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
- "Logging specific to SIMIX (process)");
-/** \defgroup m_process_management Management Functions of Agents
- * \brief This section describes the agent structure of MSG
- * (#m_process_t) and the functions for managing it.
- * \htmlonly <!-- DOXYGEN_NAVBAR_LABEL="Agents" --> \endhtmlonly
- *
- * We need to simulate many independent scheduling decisions, so
- * the concept of <em>process</em> is at the heart of the
- * simulator. A process may be defined as a <em>code</em>, with
- * some <em>private data</em>, executing in a <em>location</em>.
- * \see m_process_t
- */
+ "Logging specific to SIMIX (process)");
/******************************** Process ************************************/
-/** \ingroup m_process_management
- * \brief Creates and runs a new #m_process_t.
- *
- * Does exactly the same as #MSG_process_create_with_arguments but without
- providing standard arguments (\a argc, \a argv, \a start_time, \a kill_time).
- * \sa MSG_process_create_with_arguments
+/**
+ * \brief Move a process to the list of process to destroy. *
*/
-smx_process_t SIMIX_process_create(const char *name,
- smx_process_code_t code, void *data,
- smx_host_t host)
+void SIMIX_process_cleanup(void *arg)
{
- return SIMIX_process_create_with_arguments(name, code, data, host, -1, NULL);
+ xbt_swag_remove(arg, simix_global->process_to_run);
+ xbt_swag_remove(arg, simix_global->process_list);
+ xbt_swag_remove(arg, ((smx_process_t)arg)->smx_host->process_list);
+ xbt_swag_insert(arg, simix_global->process_to_destroy);
+}
+
+/**
+ * Garbage collection
+ *
+ * Should be called some time to time to free the memory allocated for processes
+ * that have finished (or killed).
+ */
+void SIMIX_process_empty_trash(void)
+{
+ smx_process_t process = NULL;
+
+ while ((process = xbt_swag_extract(simix_global->process_to_destroy))){
+ SIMIX_context_free(process->context);
+ free(process->name);
+ process->name = NULL;
+ free(process);
+ }
}
-static void SIMIX_process_cleanup(void *arg)
+/**
+ * \brief Creates and runs the maestro process
+ */
+void __SIMIX_create_maestro_process()
{
- xbt_swag_remove(arg, simix_global->process_list);
- xbt_swag_remove(arg, simix_global->process_to_run);
- xbt_swag_remove(arg, ((smx_process_t) arg)->simdata->host->simdata->process_list);
- free(((smx_process_t) arg)->name);
- ((smx_process_t) arg)->name = NULL;
- free(((smx_process_t) arg)->simdata);
- ((smx_process_t) arg)->simdata = NULL;
- free(arg);
+ smx_process_t process = NULL;
+ process = xbt_new0(s_smx_process_t, 1);
+
+ /* Process data */
+ process->name = (char *)"";
+
+ /* Create the right context type */
+ process->context = SIMIX_context_create_maestro();
+
+ /* Set it as the maestro process */
+ simix_global->maestro_process = process;
+ simix_global->current_process = process;
+
+ return;
}
-/** \ingroup m_process_management
- * \brief Creates and runs a new #m_process_t.
-
- * A constructor for #m_process_t taking four arguments and returning the
- * corresponding object. The structure (and the corresponding thread) is
- * created, and put in the list of ready process.
- * \param name a name for the object. It is for user-level information
- and can be NULL.
- * \param code is a function describing the behavior of the agent. It
- should then only use functions described in \ref
- m_process_management (to create a new #m_process_t for example),
- in \ref m_host_management (only the read-only functions i.e. whose
- name contains the word get), in \ref m_task_management (to create
- or destroy some #m_task_t for example) and in \ref
- msg_gos_functions (to handle file transfers and task processing).
- * \param data a pointer to any data one may want to attach to the new
- object. It is for user-level information and can be NULL. It can
- be retrieved with the function \ref MSG_process_get_data.
+/**
+ * \brief Creates and runs a new #smx_process_t.
+ *
+ * A constructor for #m_process_t taking four arguments and returning the corresponding object. The structure (and the corresponding thread) is created, and put in the list of ready process.
+ *
+ * \param name a name for the object. It is for user-level information and can be NULL.
+ * \param data a pointer to any data one may want to attach to the new object. It is for user-level information and can be NULL. It can be retrieved with the function \ref MSG_process_get_data.
* \param host the location where the new agent is executed.
* \param argc first argument passed to \a code
* \param argv second argument passed to \a code
- * \see m_process_t
+ * \param clean_process_function The cleanup function of user process. It will be called when the process finish. This function have to call the SIMIX_process_cleanup.
+ * \see smx_process_t
* \return The new corresponding object.
*/
-smx_process_t SIMIX_process_create_with_arguments(const char *name,
- smx_process_code_t code, void *data,
- smx_host_t host, int argc, char **argv)
+smx_process_t SIMIX_process_create(const char *name,
+ xbt_main_func_t code, void *data,
+ const char *hostname, int argc,
+ char **argv, xbt_dict_t properties)
{
- simdata_process_t simdata = xbt_new0(s_simdata_process_t,1);
- smx_process_t process = xbt_new0(s_smx_process_t,1);
- smx_process_t self = NULL;
+ smx_process_t process = NULL;
+ smx_host_t host = SIMIX_host_get_by_name(hostname);
- xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
- /* Simulator Data */
-
- simdata->host = host;
- simdata->argc = argc;
- simdata->argv = argv;
- simdata->context = xbt_context_new(code, NULL, NULL,
- SIMIX_process_cleanup, process,
- simdata->argc, simdata->argv);
+ DEBUG2("Start process %s on host %s", name, hostname);
- if((self=simix_global->current_process)) {
- //simdata->PPID = MSG_process_get_PID(self);
- } else {
- // simdata->PPID = -1;
+ if (!SIMIX_host_get_state(host)) {
+ WARN2("Cannot launch process '%s' on failed host '%s'", name, hostname);
+ return NULL;
}
- simdata->last_errno=SIMIX_OK;
+ process = xbt_new0(s_smx_process_t, 1);
+ xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
- /* Process structure */
+ /* Process data */
process->name = xbt_strdup(name);
- process->simdata = simdata;
+ process->smx_host = host;
+ process->mutex = NULL;
+ process->cond = NULL;
+ process->iwannadie = 0;
+
+ VERB1("Create context %s", process->name);
+ process->context = SIMIX_context_new(code, argc, argv,
+ simix_global->cleanup_process_function,
+ process);
+
process->data = data;
- xbt_swag_insert_at_head(process, host->simdata->process_list);
+ /* Add properties */
+ process->properties = properties;
- /* *************** FIX du current_process !!! *************** */
- self = simix_global->current_process;
- xbt_context_start(process->simdata->context);
- simix_global->current_process = self;
+ /* Add the process to it's host process list */
+ xbt_swag_insert(process, host->process_list);
- xbt_swag_insert_at_head(process,simix_global->process_list);
- DEBUG2("Inserting %s(%s) in the to_run list",process->name,
- host->name);
- xbt_swag_insert_at_head(process,simix_global->process_to_run);
+ DEBUG1("Start context '%s'", process->name);
+ SIMIX_context_start(process->context);
+
+ /* Now insert it in the global process list and in the process to run list */
+ xbt_swag_insert(process, simix_global->process_list);
+ DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
+ xbt_swag_insert(process, simix_global->process_to_run);
return process;
}
-/** \ingroup m_process_management
- * \param process poor victim
+/**
+ * \brief Creates and runs a new #smx_process_t hosting a JAVA thread
*
- * This function simply kills a \a process... scarry isn't it ? :)
+ * Warning: this should only be used in libsimgrid4java, since it create
+ * a context with no code, which leads to segfaults in plain libsimgrid
*/
-void SIMIX_process_kill(smx_process_t process)
+void SIMIX_jprocess_create(const char *name, smx_host_t host,
+ void *data,
+ void *jprocess, void *jenv, smx_process_t * res)
{
- //int i;
- simdata_process_t p_simdata = process->simdata;
- //simdata_host_t h_simdata= p_simdata->host->simdata;
- //int _cursor;
- //smx_process_t proc = NULL;
+ smx_process_t process = xbt_new0(s_smx_process_t, 1);
+ smx_process_t self = NULL;
- DEBUG2("Killing %s on %s",process->name, p_simdata->host->name);
-
- /*
-
- if(p_simdata->waiting_task) {
- xbt_dynar_foreach(p_simdata->waiting_task->simdata->sleeping,_cursor,proc) {
- if(proc==process)
- xbt_dynar_remove_at(p_simdata->waiting_task->simdata->sleeping,_cursor,&proc);
- }
- if(p_simdata->waiting_task->simdata->compute)
- surf_workstation_resource->common_public->
- action_free(p_simdata->waiting_task->simdata->compute);
- else if (p_simdata->waiting_task->simdata->comm) {
- surf_workstation_resource->common_public->
- action_change_state(p_simdata->waiting_task->simdata->comm,SURF_ACTION_FAILED);
- surf_workstation_resource->common_public->
- action_free(p_simdata->waiting_task->simdata->comm);
- } else {
- xbt_die("UNKNOWN STATUS. Please report this bug.");
- }
- }
+ /* HACK: We need this trick because when we xbt_context_new() do
+ syncronization stuff, the s_process field in the m_process needs
+ to have a valid value, and we call xbt_context_new() before
+ returning, of course, ie, before providing a right value to the
+ caller (Java_simgrid_msg_Msg_processCreate) have time to store it
+ in place. This way, we initialize the m_process->simdata->s_process
+ field ourself ASAP.
- if ((i==msg_global->max_channel) && (process!=MSG_process_self()) &&
- (!p_simdata->waiting_task)) {
- xbt_die("UNKNOWN STATUS. Please report this bug.");
- }
-*/
- xbt_swag_remove(process,simix_global->process_to_run);
- xbt_swag_remove(process,simix_global->process_list);
- xbt_context_free(process->simdata->context);
-
- if(process==SIMIX_process_self()) {
- /* I just killed myself */
- xbt_context_yield();
- }
+ All this would be much simpler if the synchronization stuff would be done
+ in the JAVA world, I think.
+ */
+ *res = process;
+
+ DEBUG5("jprocess_create(name=%s,host=%p,data=%p,jproc=%p,jenv=%p)",
+ name, host, data, jprocess, jenv);
+ xbt_assert0(host, "Invalid parameters");
+
+ /* Process data */
+ process->name = xbt_strdup(name);
+ process->smx_host = host;
+ process->mutex = NULL;
+ process->cond = NULL;
+ SIMIX_context_new(jprocess, 0, NULL, NULL, NULL);
+ process->data = data;
+
+ /* Add the process to it's host process list */
+ xbt_swag_insert(&process, host->process_list);
+
+ /* fix current_process, about which xbt_context_start mocks around */
+ self = simix_global->current_process;
+ SIMIX_context_start(process->context);
+ simix_global->current_process = self;
+
+ /* Now insert it in the global process list and in the process to run list */
+ xbt_swag_insert(process, simix_global->process_list);
+ DEBUG2("Inserting %s(%s) in the to_run list", process->name, host->name);
+ xbt_swag_insert(process, simix_global->process_to_run);
}
-/** \ingroup m_process_management
- * \brief Migrates an agent to another location.
+/** \brief Kill a SIMIX process
+ *
+ * This function simply kills a \a process... scarry isn't it ? :).
+ * \param process poor victim
*
- * This functions checks whether \a process and \a host are valid pointers
- and change the value of the #m_host_t on which \a process is running.
*/
-SIMIX_error_t SIMIX_process_change_host(smx_process_t process, smx_host_t host)
+void SIMIX_process_kill(smx_process_t process)
{
- simdata_process_t simdata = NULL;
+ DEBUG2("Killing process %s on %s", process->name, process->smx_host->name);
+
+ /* Cleanup if we were waiting for something */
+ if (process->mutex)
+ xbt_swag_remove(process, process->mutex->sleeping);
- /* Sanity check */
+ if (process->cond)
+ xbt_swag_remove(process, process->cond->sleeping);
- xbt_assert0(((process) && (process->simdata)
- && (host)), "Invalid parameters");
- simdata = process->simdata;
+ DEBUG2("%p here! killing %p", simix_global->current_process, process);
- xbt_swag_remove(process,simdata->host->simdata->process_list);
- simdata->host = host;
- xbt_swag_insert_at_head(process,host->simdata->process_list);
+ process->iwannadie = 1;
- return SIMIX_OK;
+ /* If I'm killing myself then stop otherwise schedule the process to kill */
+ if (process == SIMIX_process_self())
+ SIMIX_context_stop(process->context);
+ else
+ __SIMIX_process_schedule(process);
+
}
-/** \ingroup m_process_management
- * \brief Return the user data of a #m_process_t.
+/**
+ * \brief Return the user data of a #smx_process_t.
*
- * This functions checks whether \a process is a valid pointer or not
- and return the user data associated to \a process if it is possible.
+ * This functions checks whether \a process is a valid pointer or not and return the user data associated to \a process if it is possible.
+ * \param process SIMIX process
+ * \return A void pointer to the user data
*/
void *SIMIX_process_get_data(smx_process_t process)
{
xbt_assert0((process != NULL), "Invalid parameters");
-
return (process->data);
}
-/** \ingroup m_process_management
+/**
* \brief Set the user data of a #m_process_t.
*
- * This functions checks whether \a process is a valid pointer or not
- and set the user data associated to \a process if it is possible.
+ * This functions checks whether \a process is a valid pointer or not and set the user data associated to \a process if it is possible.
+ * \param process SIMIX process
+ * \param data User data
*/
-SIMIX_error_t SIMIX_process_set_data(smx_process_t process,void *data)
+void SIMIX_process_set_data(smx_process_t process, void *data)
{
xbt_assert0((process != NULL), "Invalid parameters");
- xbt_assert0((process->data == NULL), "Data already set");
-
+
process->data = data;
-
- return SIMIX_OK;
+ return;
}
-/** \ingroup m_process_management
+/**
* \brief Return the location on which an agent is running.
*
- * This functions checks whether \a process is a valid pointer or not
- and return the m_host_t corresponding to the location on which \a
- process is running.
+ * This functions checks whether \a process is a valid pointer or not and return the m_host_t corresponding to the location on which \a process is running.
+ * \param process SIMIX process
+ * \return SIMIX host
*/
smx_host_t SIMIX_process_get_host(smx_process_t process)
{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
-
- return (((simdata_process_t) process->simdata)->host);
-}
-
-/** \ingroup m_process_management
- *
- * \brief Return a #m_process_t given its PID.
- *
- * This functions search in the list of all the created m_process_t for a m_process_t
- whose PID is equal to \a PID. If no host is found, \c NULL is returned.
- Note that the PID are uniq in the whole simulation, not only on a given host.
- */
-/*
-m_process_t MSG_process_from_PID(int PID)
-{
- xbt_fifo_item_t i = NULL;
- m_process_t process = NULL;
-
- xbt_fifo_foreach(msg_global->process_list,i,process,m_process_t) {
- if(MSG_process_get_PID(process) == PID) return process;
- }
- return NULL;
-}
-*/
-
-/** \ingroup m_process_management
- * \brief Returns the process ID of \a process.
- *
- * This functions checks whether \a process is a valid pointer or not
- and return its PID.
- */
-/*
-int MSG_process_get_PID(m_process_t process)
-{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
-
- return (((simdata_process_t) process->simdata)->PID);
+ xbt_assert0((process != NULL), "Invalid parameters");
+ return (process->smx_host);
}
-*/
-/** \ingroup m_process_management
- * \brief Returns the process ID of the parent of \a process.
- *
- * This functions checks whether \a process is a valid pointer or not
- and return its PID. Returns -1 if the agent has not been created by
- another agent.
- */
-/*
-int MSG_process_get_PPID(m_process_t process)
-{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
- return (((simdata_process_t) process->simdata)->PPID);
-}
-*/
-/** \ingroup m_process_management
+/**
* \brief Return the name of an agent.
*
- * This functions checks whether \a process is a valid pointer or not
- and return its name.
+ * This functions checks whether \a process is a valid pointer or not and return its name.
+ * \param process SIMIX process
+ * \return The process name
*/
const char *SIMIX_process_get_name(smx_process_t process)
{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
-
+ xbt_assert0((process != NULL), "Invalid parameters");
return (process->name);
}
-/** \ingroup m_process_management
- * \brief Return the PID of the current agent.
+/**
+ * \brief Changes the name of an agent.
*
- * This functions returns the PID of the currently running #m_process_t.
+ * This functions checks whether \a process is a valid pointer or not and return its name.
+ * \param process SIMIX process
+ * \param name The new process name
*/
-/*
-int MSG_process_self_PID(void)
+void SIMIX_process_set_name(smx_process_t process, char *name)
{
- return (MSG_process_get_PID(MSG_process_self()));
+ xbt_assert0((process != NULL), "Invalid parameters");
+ process->name = name;
}
-*/
+
/** \ingroup m_process_management
- * \brief Return the PPID of the current agent.
+ * \brief Return the properties
*
- * This functions returns the PID of the parent of the currently
- * running #m_process_t.
+ * This functions returns the properties associated with this process
*/
-/*
-int MSG_process_self_PPID(void)
+xbt_dict_t SIMIX_process_get_properties(smx_process_t process)
{
- return (MSG_process_get_PPID(MSG_process_self()));
+ return process->properties;
}
-*/
-/** \ingroup m_process_management
+
+/**
* \brief Return the current agent.
*
- * This functions returns the currently running #m_process_t.
+ * This functions returns the currently running #smx_process_t.
+ * \return The SIMIX process
*/
smx_process_t SIMIX_process_self(void)
{
return simix_global ? simix_global->current_process : NULL;
}
-/** \ingroup m_process_management
+/**
* \brief Suspend the process.
*
- * This functions suspend the process by suspending the task on which
- * it was waiting for the completion.
+ * This functions suspend the process by suspending the action on
+ * which it was waiting for the completion.
+ *
+ * \param process SIMIX process
*/
-SIMIX_error_t SIMIX_process_suspend(smx_process_t process)
+void SIMIX_process_suspend(smx_process_t process)
{
-/*
- simdata_process_t simdata = NULL;
- simdata_task_t simdata_task = NULL;
-
- XBT_IN2("(%p(%s))", process, process->name);
-
- xbt_assert0(((process) && (process->simdata)), "Invalid parameters");
-
- PAJE_PROCESS_PUSH_STATE(process,"S",NULL);
-
- if(process!=SIMIX_process_self()) {
- simdata = process->simdata;
-
- xbt_assert0(simdata->waiting_task,"Process not waiting for anything else. Weird !");
-
- simdata_task = simdata->waiting_task->simdata;
-
- simdata->suspended = 1;
- if(simdata->blocked) {
- XBT_OUT;
- return SIMIX_OK;
+ xbt_assert0(process, "Invalid parameters");
+
+ if (process != SIMIX_process_self()) {
+
+ if (process->mutex) {
+ /* process blocked on a mutex, only set suspend=1 */
+ process->suspended = 1;
+ } else if (process->cond) {
+ /* process blocked cond, suspend all actions */
+
+ /* temporaries variables */
+ smx_cond_t c;
+ xbt_fifo_item_t i;
+ smx_action_t act;
+
+ process->suspended = 1;
+ c = process->cond;
+ xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
+ surf_workstation_model->suspend(act->surf_action);
+ }
+ } else {
+ process->suspended = 1;
}
-
- xbt_assert0(((simdata_task->compute)||(simdata_task->comm))&&
- !((simdata_task->compute)&&(simdata_task->comm)),
- "Got a problem in deciding which action to choose !");
- simdata->suspended = 1;
- if(simdata_task->compute)
- surf_workstation_resource->common_public->suspend(simdata_task->compute);
- else
- surf_workstation_resource->common_public->suspend(simdata_task->comm);
} else {
- m_task_t dummy = MSG_TASK_UNINITIALIZED;
- dummy = MSG_task_create("suspended", 0.0, 0, NULL);
-
- simdata = process->simdata;
- simdata->suspended = 1;
- __MSG_task_execute(process,dummy);
- surf_workstation_resource->common_public->suspend(dummy->simdata->compute);
- __MSG_wait_for_computation(process,dummy);
- simdata->suspended = 0;
-
- MSG_task_destroy(dummy);
+ /* process executing, I can create an action and suspend it */
+ smx_action_t dummy;
+ smx_cond_t cond;
+ char name[] = "dummy";
+ process->suspended = 1;
+
+ cond = SIMIX_cond_init();
+ dummy = SIMIX_action_execute(SIMIX_process_get_host(process), name, 0);
+ surf_workstation_model->suspend(dummy->surf_action);
+ SIMIX_register_action_to_condition(dummy, cond);
+ __SIMIX_cond_wait(cond);
+ SIMIX_unregister_action_to_condition(dummy, cond);
+ SIMIX_action_destroy(dummy);
+ SIMIX_cond_destroy(cond);
}
- XBT_OUT;
- */
- return SIMIX_OK;
+ return;
}
-/** \ingroup m_process_management
+/**
* \brief Resume a suspended process.
*
- * This functions resume a suspended process by resuming the task on
- * which it was waiting for the completion.
+ * This functions resume a suspended process by resuming the task on which it was waiting for the completion.
+ * \param process SIMIX process
*/
-SIMIX_error_t SIMIX_process_resume(smx_process_t process)
+void SIMIX_process_resume(smx_process_t process)
{
-/*
- simdata_process_t simdata = NULL;
- simdata_task_t simdata_task = NULL;
-
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
- CHECK_HOST();
-
- XBT_IN2("(%p(%s))", process, process->name);
-
- if(process == SIMIX_process_self()) {
- XBT_OUT;
- SIMIX_RETURN(SIMIX_OK);
- }
-
- simdata = process->simdata;
-
- if(simdata->blocked) {
- PAJE_PROCESS_POP_STATE(process);
-
- simdata->suspended = 0; *//* He'll wake up by itself */
- /*XBT_OUT;
- SIMIX_RETURN(SIMIX_OK);
- }
-
- if(!(simdata->waiting_task)) {
- xbt_assert0(0,"Process not waiting for anything else. Weird !");
- XBT_OUT;
- return SIMIX_WARNING;
- }
- simdata_task = simdata->waiting_task->simdata;
-
-
- if(simdata_task->compute) {
- surf_workstation_resource->common_public->resume(simdata_task->compute);
- PAJE_PROCESS_POP_STATE(process);
- }
- else {
- PAJE_PROCESS_POP_STATE(process);
- surf_workstation_resource->common_public->resume(simdata_task->comm);
+ xbt_assert0((process != NULL), "Invalid parameters");
+ SIMIX_CHECK_HOST();
+
+ if (process == SIMIX_process_self())
+ return;
+
+ if (process->mutex) {
+ DEBUG0("Resume process blocked on a mutex");
+ process->suspended = 0; /* It'll wake up by itself when mutex releases */
+ return;
+ } else if (process->cond) {
+ /* temporaries variables */
+ smx_cond_t c;
+ xbt_fifo_item_t i;
+ smx_action_t act;
+ DEBUG0("Resume process blocked on a conditional");
+ process->suspended = 0;
+ c = process->cond;
+ xbt_fifo_foreach(c->actions, i, act, smx_action_t) {
+ surf_workstation_model->resume(act->surf_action);
+ }
+ SIMIX_cond_signal(c);
+ return;
+ } else {
+ process->suspended = 0;
+ xbt_swag_insert(process, simix_global->process_to_run);
}
+}
- XBT_OUT;
- */
- SIMIX_RETURN(SIMIX_OK);
+/**
+ * \brief Migrates an agent to another location.
+ *
+ * This function changes the value of the host on which \a process is running.
+ */
+void SIMIX_process_change_host(smx_process_t process, char *source, char *dest)
+{
+ xbt_assert0((process != NULL), "Invalid parameters");
+ smx_host_t h1 = SIMIX_host_get_by_name(source);
+ smx_host_t h2 = SIMIX_host_get_by_name(dest);
+ process->smx_host = h2;
+ xbt_swag_remove(process, h1->process_list);
+ xbt_swag_insert(process, h2->process_list);
}
-/** \ingroup m_process_management
+/**
* \brief Returns true if the process is suspended .
*
- * This checks whether a process is suspended or not by inspecting the
- * task on which it was waiting for the completion.
+ * This checks whether a process is suspended or not by inspecting the task on which it was waiting for the completion.
+ * \param process SIMIX process
+ * \return 1, if the process is suspended, else 0.
*/
int SIMIX_process_is_suspended(smx_process_t process)
{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
+ xbt_assert0((process != NULL), "Invalid parameters");
- return (process->simdata->suspended);
+ return (process->suspended);
}
-int __SIMIX_process_block(double max_duration, const char *info)
+/**
+ * \brief Returns the amount of SIMIX processes in the system
+ *
+ * Maestro internal process is not counted, only user code processes are
+ */
+int SIMIX_process_count()
{
-/*
- smx_process_t process = SIMIX_process_self();
- m_task_t dummy = SIMIX_TASK_UNINITIALIZED;
- char blocked_name[512];
- snprintf(blocked_name,512,"blocked [%s] (%s:%s)",
- info, process->name, process->simdata->host->name);
-
- XBT_IN1(": max_duration=%g",max_duration);
-
- dummy = MSG_task_create(blocked_name, 0.0, 0, NULL);
-
- PAJE_PROCESS_PUSH_STATE(process,"B",NULL);
-
- process->simdata->blocked=1;
- __MSG_task_execute(process,dummy);
- surf_workstation_resource->common_public->suspend(dummy->simdata->compute);
- if(max_duration>=0)
- surf_workstation_resource->common_public->set_max_duration(dummy->simdata->compute,
- max_duration);
- __MSG_wait_for_computation(process,dummy);
- MSG_task_destroy(dummy);
- process->simdata->blocked=0;
-
- if(process->simdata->suspended) {
- DEBUG0("I've been suspended in the meantime");
- SIMIX_process_suspend(process);
- DEBUG0("I've been resumed, let's keep going");
- }
-
- PAJE_PROCESS_POP_STATE(process);
-
- XBT_OUT;
- */
- return 1;
+ return xbt_swag_size(simix_global->process_list);
}
-SIMIX_error_t __SIMIX_process_unblock(smx_process_t process)
+/**
+ * Calling this function makes the process process to yield. The process
+ * that scheduled it returns from __SIMIX_process_schedule as if nothing
+ * had happened.
+ *
+ * Only the processes can call this function, giving back the control
+ * to the maestro
+ */
+void __SIMIX_process_yield(void)
{
-/*
- simdata_process_t simdata = NULL;
- simdata_task_t simdata_task = NULL;
+ DEBUG1("Yield process '%s'", simix_global->current_process->name);
+ xbt_assert0((simix_global->current_process != simix_global->maestro_process),
+ "You are not supposed to run this function here!");
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
- CHECK_HOST();
+ SIMIX_context_suspend(simix_global->current_process->context);
- XBT_IN2(": %s unblocking %s", SIMIX_process_self()->name,process->name);
-
- simdata = process->simdata;
- if(!(simdata->waiting_task)) {
- xbt_assert0(0,"Process not waiting for anything else. Weird !");
- XBT_OUT;
- return SIMIX_WARNING;
- }
- simdata_task = simdata->waiting_task->simdata;
+ if (simix_global->current_process->iwannadie)
+ SIMIX_context_stop(simix_global->current_process->context);
+}
- xbt_assert0(simdata->blocked,"Process not blocked");
+void __SIMIX_process_schedule(smx_process_t new_process)
+{
+ DEBUG1("Scheduling context: '%s'", new_process->name);
- surf_workstation_resource->common_public->resume(simdata_task->compute);
+ /* save the current process */
+ smx_process_t old_process = simix_global->current_process;
- XBT_OUT;
-*/
- SIMIX_RETURN(SIMIX_OK);
-}
+ /* update the current process */
+ simix_global->current_process = new_process;
-int __SIMIX_process_isBlocked(smx_process_t process)
-{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
+ /* schedule the context */
+ SIMIX_context_resume(old_process->context, new_process->context);
- return (process->simdata->blocked);
+ /* restore the current process to the previously saved process */
+ simix_global->current_process = old_process;
}
