3 /* Copyright (c) 2008-2015. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "simgrid/msg.h"
10 #include "msg_private.h"
12 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(msg_mailbox, msg, "Logging specific to MSG (mailbox)");
14 msg_mailbox_t MSG_mailbox_new(const char *alias)
16 return simcall_mbox_create(alias);
19 int MSG_mailbox_is_empty(msg_mailbox_t mailbox)
21 return (NULL == simcall_mbox_get_head(mailbox));
24 msg_task_t MSG_mailbox_get_head(msg_mailbox_t mailbox)
26 smx_synchro_t comm = simcall_mbox_get_head(mailbox);
31 return (msg_task_t) simcall_comm_get_src_data(comm);
34 int MSG_mailbox_get_count_host_waiting_tasks(msg_mailbox_t mailbox, msg_host_t host)
36 return simcall_mbox_comm_count_by_host(mailbox, host);
39 msg_mailbox_t MSG_mailbox_get_by_alias(const char *alias)
41 msg_mailbox_t mailbox = simcall_mbox_get_by_name(alias);
44 mailbox = MSG_mailbox_new(alias);
49 /** \ingroup msg_mailbox_management
50 * \brief Set the mailbox to receive in asynchronous mode
52 * All messages sent to this mailbox will be transferred to the receiver without waiting for the receive call.
53 * The receive call will still be necessary to use the received data.
54 * If there is a need to receive some messages asynchronously, and some not, two different mailboxes should be used.
56 * \param alias The name of the mailbox
58 void MSG_mailbox_set_async(const char *alias){
59 msg_mailbox_t mailbox = MSG_mailbox_get_by_alias(alias);
61 simcall_mbox_set_receiver(mailbox, SIMIX_process_self());
62 XBT_VERB("%s mailbox set to receive eagerly for process %p\n",alias, SIMIX_process_self());
65 /** \ingroup msg_mailbox_management
66 * \brief Get a task from a mailbox on a given host
68 * \param mailbox The mailbox where the task was sent
69 * \param task a memory location for storing a #msg_task_t.
70 * \param host a #msg_host_t host from where the task was sent
71 * \param timeout a timeout
74 * #MSG_OK if the task was successfully received,
75 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
77 msg_error_t MSG_mailbox_get_task_ext(msg_mailbox_t mailbox, msg_task_t *task, msg_host_t host, double timeout)
79 return MSG_mailbox_get_task_ext_bounded(mailbox, task, host, timeout, -1.0);
82 /** \ingroup msg_mailbox_management
83 * \brief Get a task from a mailbox on a given host at a given rate
85 * \param mailbox The mailbox where the task was sent
86 * \param task a memory location for storing a #msg_task_t.
87 * \param host a #msg_host_t host from where the task was sent
88 * \param timeout a timeout
92 * #MSG_OK if the task was successfully received,
93 * #MSG_HOST_FAILURE, or #MSG_TRANSFER_FAILURE otherwise.
95 msg_error_t MSG_mailbox_get_task_ext_bounded(msg_mailbox_t mailbox, msg_task_t * task, msg_host_t host, double timeout,
99 msg_error_t ret = MSG_OK;
100 /* We no longer support getting a task from a specific host */
104 TRACE_msg_task_get_start();
105 double start_time = MSG_get_clock();
108 xbt_assert(task, "Null pointer for the task storage");
111 XBT_WARN("Asked to write the received task in a non empty struct -- proceeding.");
113 /* Try to receive it by calling SIMIX network layer */
115 simcall_comm_recv(MSG_process_self(), mailbox, task, NULL, NULL, NULL, NULL, timeout, rate);
116 XBT_DEBUG("Got task %s from %p",(*task)->name,mailbox);
117 if (msg_global->debug_multiple_use && (*task)->simdata->isused!=0)
118 xbt_ex_free(*(xbt_ex_t*)(*task)->simdata->isused);
119 (*task)->simdata->isused = 0;
122 switch (e.category) {
124 ret = MSG_HOST_FAILURE;
127 ret = MSG_TRANSFER_FAILURE;
133 ret = MSG_HOST_FAILURE;
141 if (ret != MSG_HOST_FAILURE && ret != MSG_TRANSFER_FAILURE && ret != MSG_TIMEOUT) {
142 TRACE_msg_task_get_end(start_time, *task);
147 msg_error_t MSG_mailbox_put_with_timeout(msg_mailbox_t mailbox, msg_task_t task, double timeout)
149 msg_error_t ret = MSG_OK;
150 simdata_task_t t_simdata = NULL;
151 msg_process_t process = MSG_process_self();
152 simdata_process_t p_simdata = (simdata_process_t) SIMIX_process_self_get_data();
154 int call_end = TRACE_msg_task_put_start(task); //must be after CHECK_HOST()
156 /* Prepare the task to send */
157 t_simdata = task->simdata;
158 t_simdata->sender = process;
159 t_simdata->source = ((simdata_process_t) SIMIX_process_self_get_data())->m_host;
161 if (t_simdata->isused != 0) {
162 if (msg_global->debug_multiple_use){
163 XBT_ERROR("This task is already used in there:");
164 xbt_backtrace_display((xbt_ex_t*) t_simdata->isused);
165 XBT_ERROR("And you try to reuse it from here:");
166 xbt_backtrace_display_current();
168 xbt_assert(t_simdata->isused == 0,
169 "This task is still being used somewhere else. You cannot send it now. Go fix your code!"
170 " (use --cfg=msg/debug_multiple_use:on to get the backtrace of the other process)");
174 if (msg_global->debug_multiple_use)
175 MSG_BT(t_simdata->isused, "Using Backtrace");
177 t_simdata->isused = (void*)1;
178 t_simdata->comm = NULL;
179 msg_global->sent_msg++;
181 p_simdata->waiting_task = task;
184 /* Try to send it by calling SIMIX network layer */
186 smx_synchro_t comm = NULL; /* MC needs the comm to be set to NULL during the simix call */
187 comm = simcall_comm_isend(SIMIX_process_self(), mailbox,t_simdata->bytes_amount,
188 t_simdata->rate, task, sizeof(void *), NULL, NULL, NULL, task, 0);
189 if (TRACE_is_enabled())
190 simcall_set_category(comm, task->category);
191 t_simdata->comm = comm;
192 simcall_comm_wait(comm, timeout);
196 switch (e.category) {
198 ret = MSG_HOST_FAILURE;
201 ret = MSG_TRANSFER_FAILURE;
211 /* If the send failed, it is not used anymore */
212 if (msg_global->debug_multiple_use && t_simdata->isused!=0)
213 xbt_ex_free(*(xbt_ex_t*)t_simdata->isused);
214 t_simdata->isused = 0;
217 p_simdata->waiting_task = NULL;
219 TRACE_msg_task_put_end();