-/* $Id$ */
-
-/* Copyright (c) 2002-2007 Arnaud Legrand. */
-/* Copyright (c) 2007 Bruno Donassolo. */
-/* All rights reserved. */
+/* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. 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 "msg/private.h"
#include "xbt/sysdep.h"
#include "xbt/log.h"
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_process, msg, "Logging specific to MSG (process)");
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_process, msg,
+ "Logging specific to MSG (process)");
/** \defgroup m_process_management Management Functions of Agents
* \brief This section describes the agent structure of MSG
*/
/** @addtogroup m_process_management
* \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
*/
/******************************** Process ************************************/
+void __MSG_process_cleanup(smx_process_t smx_proc)
+{
+ /* arg is a pointer to a simix process, we can get the msg process with the field data */
+ m_process_t proc = SIMIX_req_process_get_data(smx_proc);
+#ifdef HAVE_TRACING
+ TRACE_msg_process_end(proc);
+#endif
+ xbt_fifo_remove(msg_global->process_list, proc);
+ SIMIX_process_cleanup(smx_proc);
+ if (proc->name) {
+ free(proc->name);
+ proc->name = NULL;
+ }
+ if (proc->simdata) {
+ free(proc->simdata);
+ proc->simdata = NULL;
+ }
+ free(proc);
+
+ return;
+}
+
+/* This function creates a MSG process. It has the prototype enforced by SIMIX_function_register_process_create */
+void *_MSG_process_create_from_SIMIX(const char *name,
+ xbt_main_func_t code, void *data,
+ char *hostname, int argc, char **argv,
+ xbt_dict_t properties)
+{
+ m_host_t host = MSG_get_host_by_name(hostname);
+ return (void *) MSG_process_create_with_environment(name, code, data,
+ host, argc, argv,
+ properties);
+}
+
/** \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
+ * 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
*/
m_process_t MSG_process_create(const char *name,
- xbt_main_func_t code, void *data,
- m_host_t host)
-{
- return MSG_process_create_with_arguments(name, code, data, host, -1, NULL);
-}
-
-void __MSG_process_cleanup(void *arg)
+ xbt_main_func_t code, void *data,
+ m_host_t host)
{
- /* arg is a pointer to a simix process, we can get the msg process with the field data */
- m_process_t proc = ((smx_process_t)arg)->data;
- xbt_fifo_remove(msg_global->process_list, proc);
- SIMIX_process_cleanup(arg);
- free(proc->name);
- proc->name = NULL;
- free(proc->simdata);
- proc->simdata = NULL;
- free(proc);
-
- return;
+ return MSG_process_create_with_environment(name, code, data, host, -1,
+ NULL, NULL);
}
/** \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
+ * 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
* \return The new corresponding object.
*/
-
-
-m_process_t __MSG_process_create_with_arguments(const char *name,
- xbt_main_func_t code, void *data,
- char * hostname, int argc, char **argv)
+m_process_t MSG_process_create_with_arguments(const char *name,
+ xbt_main_func_t code,
+ void *data, m_host_t host,
+ int argc, char **argv)
{
- m_host_t host = MSG_get_host_by_name(hostname);
- return MSG_process_create_with_arguments(name,code,data,host,argc,argv);
+ return MSG_process_create_with_environment(name, code, data, host,
+ argc, argv, NULL);
}
-m_process_t MSG_process_create_with_arguments(const char *name,
- xbt_main_func_t code, void *data,
- m_host_t host, int argc, char **argv)
+/** \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.
+ * \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
+ * \param properties list a properties defined for this process
+ * \see m_process_t
+ * \return The new corresponding object.
+ */
+m_process_t MSG_process_create_with_environment(const char *name,
+ xbt_main_func_t code,
+ void *data, m_host_t host,
+ int argc, char **argv,
+ xbt_dict_t properties)
{
- simdata_process_t simdata = xbt_new0(s_simdata_process_t,1);
- m_process_t process = xbt_new0(s_m_process_t,1);
+ simdata_process_t simdata = NULL;
+ m_process_t process = xbt_new0(s_m_process_t, 1);
xbt_assert0(((code != NULL) && (host != NULL)), "Invalid parameters");
+ simdata = xbt_new0(s_simdata_process_t, 1);
+
/* Simulator Data */
simdata->PID = msg_global->PID++;
- simdata->waiting_task = NULL;
+ simdata->waiting_action = NULL;
+ simdata->waiting_task = NULL;
simdata->m_host = host;
simdata->argc = argc;
simdata->argv = argv;
- simdata->s_process = SIMIX_process_create(name, code,
- (void*)process, host->name, argc, argv,
- __MSG_process_cleanup );
if (SIMIX_process_self()) {
- simdata->PPID = MSG_process_get_PID(SIMIX_process_self()->data);
+ simdata->PPID = MSG_process_get_PID(SIMIX_process_self_get_data());
} else {
simdata->PPID = -1;
}
- simdata->last_errno=MSG_OK;
-
+ simdata->last_errno = MSG_OK;
/* Process structure */
process->name = xbt_strdup(name);
process->simdata = simdata;
process->data = data;
-
- xbt_fifo_unshift(msg_global->process_list, process);
+ xbt_fifo_unshift(msg_global->process_list, process);
+
+ /* Let's create the process (SIMIX may decide to start it right now) */
+ simdata->s_process = SIMIX_req_process_create(name, code, (void *) process, host->name,
+ argc, argv, properties);
+
+ if (!simdata->s_process) {
+ /* Undo everything we have just changed */
+ msg_global->PID--;
+ xbt_fifo_remove(msg_global->process_list, process);
+ xbt_free(process->name);
+ xbt_free(process);
+ xbt_free(simdata);
+ return NULL;
+ }
return process;
}
+void _MSG_process_kill_from_SIMIX(void *p)
+{
+#ifdef HAVE_TRACING
+ TRACE_msg_process_kill((m_process_t) p);
+#endif
+ MSG_process_kill((m_process_t) p);
+}
+
/** \ingroup m_process_management
* \param process poor victim
*
{
simdata_process_t p_simdata = process->simdata;
+#ifdef HAVE_TRACING
+ TRACE_msg_process_kill(process);
+#endif
+
DEBUG3("Killing %s(%d) on %s",
- process->name, p_simdata->PID, p_simdata->m_host->name);
-
- if(p_simdata->waiting_task) {
- DEBUG1("Canceling waiting task %s",p_simdata->waiting_task->name);
- if(p_simdata->waiting_task->simdata->compute) {
- SIMIX_action_cancel(p_simdata->waiting_task->simdata->compute);
- } else if (p_simdata->waiting_task->simdata->comm) {
- SIMIX_action_cancel(p_simdata->waiting_task->simdata->comm);
- }
- }
+ process->name, p_simdata->PID, p_simdata->m_host->name);
- xbt_fifo_remove(msg_global->process_list,process);
- SIMIX_process_kill(process->simdata->s_process);
+ if (p_simdata->waiting_task && p_simdata->waiting_task->simdata->comm) {
+ SIMIX_req_comm_cancel(p_simdata->waiting_task->simdata->comm);
+ }
+
+ xbt_fifo_remove(msg_global->process_list, process);
+ SIMIX_req_process_kill(process->simdata->s_process);
return;
}
/** \ingroup m_process_management
* \brief Migrates an agent to another location.
*
- * This functions checks whether \a process and \a host are valid pointers
+ * This function 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.
*/
-MSG_error_t MSG_process_change_host(m_process_t process, m_host_t host)
+MSG_error_t MSG_process_change_host(m_host_t host)
{
- xbt_die("MSG_process_change_host - not implemented yet - maybe useless function");
+ m_process_t process = MSG_process_self();
+ m_host_t now = process->simdata->m_host;
+ process->simdata->m_host = host;
+#ifdef HAVE_TRACING
+ TRACE_msg_process_change_host(process, now, host);
+#endif
+ SIMIX_req_process_change_host(process->simdata->s_process, now->name,
+ host->name);
return MSG_OK;
}
/** \ingroup m_process_management
* \brief Return the user data of a #m_process_t.
*
- * This functions checks whether \a process is a valid pointer or not
+ * This function checks whether \a process is a valid pointer or not
and return the user data associated to \a process if it is possible.
*/
void *MSG_process_get_data(m_process_t process)
/** \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
+ * This function checks whether \a process is a valid pointer or not
and set the user data associated to \a process if it is possible.
*/
-MSG_error_t MSG_process_set_data(m_process_t process,void *data)
+MSG_error_t MSG_process_set_data(m_process_t process, void *data)
{
xbt_assert0((process != NULL), "Invalid parameters");
- xbt_assert0((process->data == NULL), "Data already set");
-
+
process->data = data;
-
+
return MSG_OK;
}
/** \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
+ * This function 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.
*/
m_host_t MSG_process_get_host(m_process_t process)
{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
+ xbt_assert0(((process != NULL)
+ && (process->simdata)), "Invalid parameters");
return (((simdata_process_t) process->simdata)->m_host);
}
*
* \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.
+ * This function 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;
+ 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
+ * This function checks whether \a process is a valid pointer or not
and return its PID (or 0 in case of problem).
*/
int MSG_process_get_PID(m_process_t process)
{
- /* Do not raise an exception here: this function is used in the logs,
+ /* Do not raise an exception here: this function is used in the logs,
and it will be called back by the exception handling stuff */
if (process == NULL || process->simdata == NULL)
- return 0;
+ return 0;
return (((simdata_process_t) process->simdata)->PID);
}
/** \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
+ * This function 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");
+ 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
+ * This function checks whether \a process is a valid pointer or not
and return its name.
*/
const char *MSG_process_get_name(m_process_t process)
{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
+ xbt_assert0(process, "Invalid parameter: process is NULL");
+ xbt_assert0(process->simdata,
+ "Invalid parameter: process->simdata is NULL");
return (process->name);
}
+/** \ingroup m_process_management
+ * \brief Returns the value of a given process property
+ *
+ * \param process a process
+ * \param name a property name
+ * \return value of a property (or NULL if the property is not set)
+ */
+const char *MSG_process_get_property_value(m_process_t process,
+ const char *name)
+{
+ return xbt_dict_get_or_null(MSG_process_get_properties(process), name);
+}
+
+/** \ingroup m_process_management
+ * \brief Return the list of properties
+ *
+ * This function returns all the parameters associated with a process
+ */
+xbt_dict_t MSG_process_get_properties(m_process_t process)
+{
+ xbt_assert0((process != NULL), "Invalid parameters");
+
+ return (SIMIX_req_process_get_properties
+ (((simdata_process_t) process->simdata)->s_process));
+
+}
+
/** \ingroup m_process_management
* \brief Return the PID of the current agent.
*
- * This functions returns the PID of the currently running #m_process_t.
+ * This function returns the PID of the currently running #m_process_t.
*/
int MSG_process_self_PID(void)
{
/** \ingroup m_process_management
* \brief Return the PPID of the current agent.
*
- * This functions returns the PID of the parent of the currently
+ * This function returns the PID of the parent of the currently
* running #m_process_t.
*/
int MSG_process_self_PPID(void)
/** \ingroup m_process_management
* \brief Return the current agent.
*
- * This functions returns the currently running #m_process_t.
+ * This function returns the currently running #m_process_t.
*/
m_process_t MSG_process_self(void)
{
- smx_process_t proc = SIMIX_process_self();
- if (proc != NULL) {
- return (m_process_t)proc->data;
- }
- else {
- return NULL;
- }
-
+ /* we cannot make a SIMIX request here because this may create an exception or a logging
+ event, and both mechanisms call MSG_process_self() again (via xbt_getpid()) */
+ return (m_process_t) SIMIX_process_self_get_data();
}
/** \ingroup m_process_management
* \brief Suspend the process.
*
- * This functions suspend the process by suspending the task on which
+ * This function suspends the process by suspending the task on which
* it was waiting for the completion.
*/
MSG_error_t MSG_process_suspend(m_process_t process)
{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
+ xbt_assert0(((process != NULL)
+ && (process->simdata)), "Invalid parameters");
CHECK_HOST();
- SIMIX_process_suspend(process->simdata->s_process);
+#ifdef HAVE_TRACING
+ TRACE_msg_process_suspend(process);
+#endif
+
+ SIMIX_req_process_suspend(process->simdata->s_process);
MSG_RETURN(MSG_OK);
}
/** \ingroup m_process_management
* \brief Resume a suspended process.
*
- * This functions resume a suspended process by resuming the task on
+ * This function resumes a suspended process by resuming the task on
* which it was waiting for the completion.
*/
MSG_error_t MSG_process_resume(m_process_t process)
{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
+ xbt_assert0(((process != NULL)
+ && (process->simdata)), "Invalid parameters");
CHECK_HOST();
- SIMIX_process_resume(process->simdata->s_process);
+#ifdef HAVE_TRACING
+ TRACE_msg_process_resume(process);
+#endif
+
+ SIMIX_req_process_resume(process->simdata->s_process);
MSG_RETURN(MSG_OK);
}
*/
int MSG_process_is_suspended(m_process_t process)
{
- xbt_assert0(((process != NULL) && (process->simdata)), "Invalid parameters");
- return SIMIX_process_is_suspended(process->simdata->s_process);
+ xbt_assert0(((process != NULL)
+ && (process->simdata)), "Invalid parameters");
+ return SIMIX_req_process_is_suspended(process->simdata->s_process);
}
+
+smx_context_t MSG_process_get_smx_ctx(m_process_t process) {
+ return SIMIX_process_get_context(process->simdata->s_process);
+}
