#include <algorithm>
+#include <cstring>
#include <tr1/functional>
#include <sstream>
#include <msg/msg.h>
return oss.str();
}
-const int communicator::send_count_before_flush = 4;
-
communicator::communicator()
: host((hostdata* )MSG_host_get_data(MSG_host_self()))
- , send_counter(0)
+ , mutex(xbt_mutex_init())
+ , cond(xbt_cond_init())
, ctrl_task(NULL)
, ctrl_comm(NULL)
- , ctrl_close_is_last(false)
, data_task(NULL)
, data_comm(NULL)
- , data_close_is_last(false)
{
+ xbt_mutex_acquire(mutex);
+ receiver_process =
+ MSG_process_create("receiver", communicator::receiver_wrapper,
+ this, MSG_host_self());
+ xbt_cond_wait(cond, mutex); // wait for the receiver to be ready
+ xbt_mutex_release(mutex);
}
communicator::~communicator()
{
+ m_task_t task;
+
+ DEBUG0("send finalize to receiver/ctrl");
+ task = MSG_task_create("finalize", 0.0, 0, NULL);
+ MSG_task_send(task, get_ctrl_mbox());
+
+ DEBUG0("send finalize to receiver/data");
+ task = MSG_task_create("finalize", 0.0, 0, NULL);
+ MSG_task_send(task, get_data_mbox());
+
+ xbt_mutex_acquire(mutex);
+ while (receiver_process) {
+ DEBUG0("waiting for receiver to terminate");
+ xbt_cond_wait(cond, mutex);
+ }
+ xbt_mutex_release(mutex);
+
if (ctrl_comm)
WARN0("ctrl_comm is pending!");
if (data_comm)
WARN0("data_comm is pending!");
+ if (!received.empty())
+ WARN2("lost %lu received message%s!",
+ (unsigned long )received.size(), ESSE(received.size()));
if (!sent_comm.empty())
- WARN2("lost %ld send communication%s!",
- (long )sent_comm.size(), ESSE(sent_comm.size()));
-}
+ WARN2("lost %lu sent message%s!",
+ (unsigned long )sent_comm.size(), ESSE(sent_comm.size()));
-void communicator::listen()
-{
- ctrl_comm = MSG_task_irecv(&ctrl_task, get_ctrl_mbox());
- data_comm = MSG_task_irecv(&data_task, get_data_mbox());
+ xbt_cond_destroy(cond);
+ xbt_mutex_destroy(mutex);
}
void communicator::send(const char* dest, message* msg)
m_task_t task = MSG_task_create("message", 0.0, msg_size, msg);
msg_comm_t comm = MSG_task_isend(task, dest);
sent_comm.push_back(comm);
-
- if (++send_counter >= send_count_before_flush) {
- flush(false);
- send_counter = 0;
- }
}
-bool communicator::recv(message*& msg, m_host_t& from, bool wait)
+bool communicator::recv(message*& msg, m_host_t& from, double timeout)
{
- bool restart;
- msg = NULL;
-
- do {
- if (ctrl_comm && comm_test_n_destroy(ctrl_comm)) {
- msg = (message* )MSG_task_get_data(ctrl_task);
- from = MSG_task_get_source(ctrl_task);
- MSG_task_destroy(ctrl_task);
- ctrl_task = NULL;
- ctrl_comm =
- (!ctrl_close_is_last || msg->get_type() != message::CTRL_CLOSE)
- ? MSG_task_irecv(&ctrl_task, get_ctrl_mbox())
- : NULL;
-
- } else if (data_comm && comm_test_n_destroy(data_comm)) {
- msg = (message* )MSG_task_get_data(data_task);
- from = MSG_task_get_source(data_task);
- MSG_task_destroy(data_task);
- data_task = NULL;
- data_comm =
- (!data_close_is_last || msg->get_type() != message::DATA_CLOSE)
- ? MSG_task_irecv(&data_task, get_data_mbox())
- : NULL;
+ if (timeout != 0) {
+ volatile double deadline =
+ timeout > 0 ? MSG_get_clock() + timeout : 0.0;
+ xbt_mutex_acquire(mutex);
+ while (received.empty() && (!deadline || deadline > MSG_get_clock())) {
+ xbt_ex_t e;
+ DEBUG0("waiting for a message to come");
+ TRY {
+ if (deadline)
+ xbt_cond_timedwait(cond, mutex, deadline - MSG_get_clock());
+ else
+ xbt_cond_wait(cond, mutex);
+ }
+ CATCH (e) {
+ if (e.category != timeout_error)
+ RETHROW;
+ xbt_ex_free(e);
+ }
}
+ xbt_mutex_release(mutex);
+ }
- restart = wait && !msg && (ctrl_comm || data_comm);
- if (restart) {
- xbt_dynar_t comms = xbt_dynar_new(sizeof(msg_comm_t), NULL);
- if (ctrl_comm)
- xbt_dynar_push(comms, &ctrl_comm);
- if (data_comm)
- xbt_dynar_push(comms, &data_comm);
- MSG_comm_waitany(comms);
- xbt_dynar_free(&comms);
- }
- } while (restart);
+ if (received.empty())
+ return false;
+
+ m_task_t task = received.front();
+ received.pop();
+ msg = (message* )MSG_task_get_data(task);
+ from = MSG_task_get_source(task);
+ MSG_task_destroy(task);
- if (msg)
- DEBUG2("received %s from %s",
- msg->to_string().c_str(), MSG_host_get_name(from));
+ DEBUG2("received %s from %s",
+ msg->to_string().c_str(), MSG_host_get_name(from));
- return msg != NULL;
+ return true;
}
void communicator::flush(bool wait)
}
}
-void communicator::next_close_on_ctrl_is_last()
-{
- ctrl_close_is_last = true;
-}
-
-void communicator::next_close_on_data_is_last()
-{
- data_close_is_last = true;
-}
-
bool communicator::comm_test_n_destroy(msg_comm_t comm)
{
if (MSG_comm_test(comm)) {
return false;
}
+int communicator::receiver_wrapper(int, char* [])
+{
+ communicator* comm;
+ comm = (communicator* )MSG_process_get_data(MSG_process_self());
+ int result = comm->receiver();
+
+ DEBUG0("terminate");
+ xbt_mutex_acquire(comm->mutex);
+ comm->receiver_process = NULL;
+ xbt_cond_signal(comm->cond);
+ xbt_mutex_release(comm->mutex);
+
+ return result;
+}
+
+int communicator::receiver()
+{
+ ctrl_comm = MSG_task_irecv(&ctrl_task, get_ctrl_mbox());
+ data_comm = MSG_task_irecv(&data_task, get_data_mbox());
+ DEBUG0("receiver ready");
+ xbt_mutex_acquire(mutex);
+ xbt_cond_signal(cond); // signal master that we are ready
+ xbt_mutex_release(mutex);
+
+ xbt_dynar_t comms = xbt_dynar_new(sizeof(msg_comm_t), NULL);
+ while (ctrl_comm || data_comm) {
+
+ if (ctrl_comm)
+ xbt_dynar_push(comms, &ctrl_comm);
+ if (data_comm)
+ xbt_dynar_push(comms, &data_comm);
+ MSG_comm_waitany(comms);
+ xbt_dynar_reset(comms);
+
+ if (ctrl_comm && comm_test_n_destroy(ctrl_comm)) {
+ if (strcmp(MSG_task_get_name(ctrl_task), "finalize")) {
+ DEBUG0("received message from ctrl");
+ xbt_mutex_acquire(mutex);
+ received.push(ctrl_task);
+ xbt_mutex_release(mutex);
+ ctrl_task = NULL;
+ ctrl_comm = MSG_task_irecv(&ctrl_task, get_ctrl_mbox());
+ } else {
+ DEBUG0("received finalize from ctrl");
+ MSG_task_destroy(ctrl_task);
+ ctrl_task = NULL;
+ ctrl_comm = NULL;
+ }
+ }
+
+ if (data_comm && comm_test_n_destroy(data_comm)) {
+ if (strcmp(MSG_task_get_name(data_task), "finalize")) {
+ DEBUG0("received message from data");
+ xbt_mutex_acquire(mutex);
+ received.push(data_task);
+ xbt_mutex_release(mutex);
+ data_task = NULL;
+ data_comm = MSG_task_irecv(&data_task, get_data_mbox());
+ } else {
+ DEBUG0("received finalize from data");
+ MSG_task_destroy(data_task);
+ data_task = NULL;
+ data_comm = NULL;
+ }
+ }
+ xbt_mutex_acquire(mutex);
+ if (!received.empty())
+ xbt_cond_signal(cond);
+ xbt_mutex_release(mutex);
+ }
+ xbt_dynar_free(&comms);
+ return 0;
+}
+
// Local variables:
// mode: c++
// End:
