3 /* Copyright (c) 2002,2003,2004 Arnaud Legrand. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include "xbt/error.h"
11 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gos, msg,
12 "Logging specific to MSG (gos)");
14 /** \ingroup msg_gos_functions
15 * \brief This function is now deprecated and useless. Please stop using it.
18 MSG_error_t MSG_process_start(m_process_t process)
20 xbt_assert0(0,"This function is now deprecated and useless. Please stop using it.");
25 /** \ingroup msg_gos_functions
26 * \brief Listen on a channel and wait for receiving a task.
28 * It takes two parameter.
29 * \param task a memory location for storing a #m_task_t. It will
30 hold a task when this function will return. Thus \a task should not
31 be equal to \c NULL and \a *task should be equal to \c NULL. If one of
32 those two condition does not hold, there will be a warning message.
33 * \param channel the channel on which the agent should be
34 listening. This value has to be >=0 and < than the maximal
35 number of channels fixed with MSG_set_channel_number().
36 * \return #MSG_FATAL if \a task is equal to \c NULL, #MSG_WARNING
37 * if \a *task is not equal to \c NULL, and #MSG_OK otherwise.
39 MSG_error_t MSG_task_get(m_task_t * task,
42 m_process_t process = MSG_process_self();
45 simdata_task_t t_simdata = NULL;
46 simdata_host_t h_simdata = NULL;
48 e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
52 xbt_assert0(task,"Null pointer for the task\n");
55 CRITICAL0("MSG_task_get() was asked to write in a non empty task struct.");
59 h_simdata = h->simdata;
60 while ((t = xbt_fifo_pop(h_simdata->mbox[channel])) == NULL) {
61 xbt_assert0(!(h_simdata->sleeping[channel]),
62 "A process is already blocked on this channel");
63 h_simdata->sleeping[channel] = process; /* I'm waiting. Wake me up when you're ready */
64 MSG_process_suspend(process);
65 if(surf_workstation_resource->extension_public->get_state(h_simdata->host)
67 MSG_RETURN(MSG_HOST_FAILURE);
68 h_simdata->sleeping[channel] = NULL;
69 /* OK, we should both be ready now. Are you there ? */
72 t_simdata = t->simdata;
73 /* *task = __MSG_task_copy(t); */
78 t_simdata->comm = surf_workstation_resource->extension_public->
79 communicate(MSG_process_get_host(t_simdata->sender)->simdata->host,
80 h->simdata->host, t_simdata->message_size);
81 surf_workstation_resource->common_public->action_set_data(t_simdata->comm,t);
83 if(MSG_process_isSuspended(t_simdata->sender))
84 MSG_process_resume(t_simdata->sender);
87 __MSG_task_wait_event(process, t);
88 state=surf_workstation_resource->common_public->action_get_state(t_simdata->comm);
89 } while (state==SURF_ACTION_RUNNING);
91 if(state == SURF_ACTION_DONE) MSG_RETURN(MSG_OK);
92 else if(surf_workstation_resource->extension_public->get_state(h_simdata->host)
94 MSG_RETURN(MSG_HOST_FAILURE);
95 else MSG_RETURN(MSG_TRANSFER_FAILURE);
98 /** \ingroup msg_gos_functions
99 * \brief Test whether there is a pending communication on a channel.
101 * It takes one parameter.
102 * \param channel the channel on which the agent should be
103 listening. This value has to be >=0 and < than the maximal
104 number of channels fixed with MSG_set_channel_number().
105 * \return 1 if there is a pending communication and 0 otherwise
107 int MSG_task_Iprobe(m_channel_t channel)
110 simdata_host_t h_simdata = NULL;
114 h_simdata = h->simdata;
115 return(xbt_fifo_getFirstItem(h_simdata->mbox[channel])!=NULL);
118 /** \ingroup msg_gos_functions
119 * \brief Put a task on a channel of an host and waits for the end of the
122 * This function is used for describing the behavior of an agent. It
123 * takes three parameter.
124 * \param task a #m_task_t to send on another location. This task
125 will not be usable anymore when the function will return. There is
126 no automatic task duplication and you have to save your parameters
127 before calling this function. Tasks are unique and once it has been
128 sent to another location, you should not access it anymore. You do
129 not need to call MSG_task_destroy() but to avoid using, as an
130 effect of inattention, this task anymore, you definitely should
131 renitialize it with #MSG_TASK_UNINITIALIZED. Note that this task
132 can be transfered iff it has been correctly created with
134 * \param dest the destination of the message
135 * \param channel the channel on which the agent should put this
136 task. This value has to be >=0 and < than the maximal number of
137 channels fixed with MSG_set_channel_number().
138 * \return #MSG_FATAL if \a task is not properly initialized and
141 MSG_error_t MSG_task_put(m_task_t task,
142 m_host_t dest, m_channel_t channel)
144 m_process_t process = MSG_process_self();
145 simdata_task_t task_simdata = NULL;
146 e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
147 m_host_t local_host = NULL;
148 m_host_t remote_host = NULL;
152 task_simdata = task->simdata;
153 task_simdata->sender = process;
154 xbt_assert0(task_simdata->using==1,"Gargl!");
155 task_simdata->comm = NULL;
157 local_host = ((simdata_process_t) process->simdata)->host;
160 xbt_fifo_push(((simdata_host_t) remote_host->simdata)->
161 mbox[channel], task);
163 if(remote_host->simdata->sleeping[channel])
164 MSG_process_resume(remote_host->simdata->sleeping[channel]);
166 process->simdata->put_host = dest;
167 process->simdata->put_channel = channel;
168 while(!(task_simdata->comm))
169 MSG_process_suspend(process);
170 process->simdata->put_host = NULL;
171 process->simdata->put_channel = -1;
175 __MSG_task_wait_event(process, task);
176 state=surf_workstation_resource->common_public->action_get_state(task_simdata->comm);
177 } while (state==SURF_ACTION_RUNNING);
179 MSG_task_destroy(task);
181 if(state == SURF_ACTION_DONE) MSG_RETURN(MSG_OK);
182 else if(surf_workstation_resource->extension_public->get_state(local_host->simdata->host)
184 MSG_RETURN(MSG_HOST_FAILURE);
185 else MSG_RETURN(MSG_TRANSFER_FAILURE);
188 /** \ingroup msg_gos_functions
189 * \brief Executes a task and waits for its termination.
191 * This function is used for describing the behavior of an agent. It
192 * takes only one parameter.
193 * \param task a #m_task_t to execute on the location on which the
195 * \return #MSG_FATAL if \a task is not properly initialized and
198 MSG_error_t MSG_task_execute(m_task_t task)
200 m_process_t process = MSG_process_self();
202 __MSG_task_execute(process, task);
203 return __MSG_wait_for_computation(process,task);
206 void __MSG_task_execute(m_process_t process, m_task_t task)
208 simdata_task_t simdata = NULL;
212 simdata = task->simdata;
214 simdata->compute = surf_workstation_resource->extension_public->
215 execute(MSG_process_get_host(process)->simdata->host,
216 simdata->computation_amount);
217 surf_workstation_resource->common_public->action_set_data(simdata->compute,task);
220 MSG_error_t __MSG_wait_for_computation(m_process_t process, m_task_t task)
222 e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
223 simdata_task_t simdata = task->simdata;
227 __MSG_task_wait_event(process, task);
228 state=surf_workstation_resource->common_public->action_get_state(simdata->compute);
229 } while (state==SURF_ACTION_RUNNING);
233 if(state == SURF_ACTION_DONE) MSG_RETURN(MSG_OK);
234 else if(surf_workstation_resource->extension_public->
235 get_state(MSG_process_get_host(process)->simdata->host)
237 MSG_RETURN(MSG_HOST_FAILURE);
238 else MSG_RETURN(MSG_TRANSFER_FAILURE);
241 /** \ingroup msg_gos_functions
242 * \brief Sleep for the specified number of seconds
244 * Makes the current process sleep until \a time seconds have elapsed.
246 * \param nb_sec a number of second
248 MSG_error_t MSG_process_sleep(long double nb_sec)
250 e_surf_action_state_t state = SURF_ACTION_NOT_IN_THE_SYSTEM;
251 m_process_t process = MSG_process_self();
252 m_task_t dummy = NULL;
253 simdata_task_t simdata = NULL;
256 dummy = MSG_task_create("MSG_sleep", nb_sec, 0.0, NULL);
257 simdata = dummy->simdata;
259 simdata->compute = surf_workstation_resource->extension_public->
260 sleep(MSG_process_get_host(process)->simdata->host,
261 simdata->computation_amount);
262 surf_workstation_resource->common_public->action_set_data(simdata->compute,dummy);
267 __MSG_task_wait_event(process, dummy);
268 state=surf_workstation_resource->common_public->action_get_state(simdata->compute);
269 } while (state==SURF_ACTION_RUNNING);
272 if(state == SURF_ACTION_DONE) {
273 if(surf_workstation_resource->extension_public->
274 get_state(MSG_process_get_host(process)->simdata->host)
276 MSG_RETURN(MSG_HOST_FAILURE);
278 if(MSG_process_isSuspended(process)) {
279 MSG_process_suspend(MSG_process_self());
281 if(surf_workstation_resource->extension_public->
282 get_state(MSG_process_get_host(process)->simdata->host)
284 MSG_RETURN(MSG_HOST_FAILURE);
285 MSG_task_destroy(dummy);
287 } else MSG_RETURN(MSG_HOST_FAILURE);
290 /** \ingroup msg_gos_functions
291 * \brief Return the number of MSG tasks currently running on a
292 * the host of the current running process.
294 int MSG_get_msgload(void)
297 xbt_assert0(0,"Not implemented yet!");
302 /** \ingroup msg_gos_functions
304 * \brief Return the the last value returned by a MSG function (except
307 MSG_error_t MSG_get_errno(void)
309 return PROCESS_GET_ERRNO();