#include "xbt/sysdep.h"
#include "xbt/log.h"
#include "xbt/dict.h"
-#include "msg/mailbox.h"
#include "mc/mc.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_process, simix,
}
/**
- * \brief Move a process to the list of processes to destroy.
+ * \brief Returns whether a process has pending asynchronous communications.
+ * \return true if there are asynchronous communications in this process
+ */
+int SIMIX_process_has_pending_comms(smx_process_t process) {
+
+ return xbt_fifo_size(process->comms) > 0;
+}
+
+/**
+ * \brief Moves a process to the list of processes to destroy.
*/
void SIMIX_process_cleanup(smx_process_t process)
{
smx_action_t action;
while ((action = xbt_fifo_pop(process->comms))) {
- /* make sure no one will finish the comm after this process is destroyed */
+ /* make sure no one will finish the comm after this process is destroyed,
+ * because src_proc or dst_proc would be an invalid pointer */
SIMIX_comm_cancel(action);
if (action->comm.src_proc == process) {
- XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d",
- action, action->comm.detached, action->state);
+ XBT_DEBUG("Found an unfinished send comm %p (detached = %d), state %d, src = %p, dst = %p",
+ action, action->comm.detached, action->state, action->comm.src_proc, action->comm.dst_proc);
action->comm.src_proc = NULL;
if (action->comm.detached) {
- /* the receiver was supposed to destroy the comm after completion,
- * but the comm will actually never finish */
- action->comm.refcount++;
+ if (action->comm.refcount == 0) {
+ XBT_DEBUG("Increase the refcount before destroying it since it's detached");
+ /* I'm not supposed to destroy a detached comm from the sender side,
+ * unless there is no receiver matching the rdv */
+ action->comm.refcount++;
+ SIMIX_comm_destroy(action);
+ }
+ else {
+ XBT_DEBUG("Don't destroy it since its refcount is %d", action->comm.refcount);
+ }
+ } else {
+ SIMIX_comm_destroy(action);
}
}
else if (action->comm.dst_proc == process){
- XBT_DEBUG("Found an unfinished recv comm %p, state %d", action, action->state);
+ XBT_DEBUG("Found an unfinished recv comm %p, state %d, src = %p, dst = %p",
+ action, action->state, action->comm.src_proc, action->comm.dst_proc);
action->comm.dst_proc = NULL;
+
+ if (action->comm.detached && action->comm.refcount == 1
+ && action->comm.src_proc != NULL) {
+ /* the comm will be freed right now, remove it from the sender */
+ xbt_fifo_remove(action->comm.src_proc->comms, action);
+ }
+ SIMIX_comm_destroy(action);
}
else {
- XBT_DEBUG("Strange, I'm not in comm %p, state = %d, src = %p, dst = %p", action,
- action->state, action->comm.src_proc, action->comm.dst_proc);
- THROW_IMPOSSIBLE;
+ xbt_die("Communication action %p is in my list but I'm not the sender "
+ "or the receiver", action);
}
-
- /* FIXME uncommenting this instruction crashes complex simulations
- SIMIX_comm_destroy(action); */
}
/*xbt_swag_remove(process, simix_global->process_to_run);*/
SIMIX_context_free(process->context);
/* Free the exception allocated at creation time */
- if (process->running_ctx)
- free(process->running_ctx);
- if (process->properties)
- xbt_dict_free(&process->properties);
+ free(process->running_ctx);
+ xbt_dict_free(&process->properties);
xbt_fifo_free(process->comms);
free(process->name);
- process->name = NULL;
free(process);
}
}
(*process)->smx_host = host;
(*process)->data = data;
(*process)->comms = xbt_fifo_new();
+ (*process)->request.issuer = *process;
XBT_VERB("Create context %s", (*process)->name);
(*process)->context = SIMIX_context_new(code, argc, argv,
*/
void SIMIX_process_runall(void)
{
- SIMIX_context_runall(simix_global->process_to_run);
+ SIMIX_context_runall();
+
xbt_dynar_t tmp = simix_global->process_that_ran;
simix_global->process_that_ran = simix_global->process_to_run;
simix_global->process_to_run = tmp;
break;
case SIMIX_ACTION_COMMUNICATE:
+ xbt_fifo_remove(process->comms, process->waiting_action);
SIMIX_comm_destroy(process->waiting_action);
break;
break;
case SIMIX_ACTION_IO:
- THROW_UNIMPLEMENTED;
- break;
+ SIMIX_io_destroy(process->waiting_action);
+ break;
}
}
void SIMIX_process_suspend(smx_process_t process, smx_process_t issuer)
{
+ xbt_assert((process != NULL), "Invalid parameters");
+
+ if (process->suspended) {
+ XBT_DEBUG("Process '%s' is already suspended", process->name);
+ return;
+ }
+
process->suspended = 1;
/* If we are suspending another process, and it is waiting on an action,
- suspend it's action. */
+ suspend its action. */
if (process != issuer) {
if (process->waiting_action) {
break;
default:
- THROW_IMPOSSIBLE;
+ xbt_die("Internal error in SIMIX_process_suspend: unexpected action type %d",
+ process->waiting_action->type);
}
}
}
{
xbt_assert((process != NULL), "Invalid parameters");
+ if (!process->suspended) {
+ XBT_DEBUG("Process '%s' is not suspended", process->name);
+ return;
+ }
+
process->suspended = 0;
/* If we are resuming another process, resume the action it was waiting for
break;
default:
- THROW_IMPOSSIBLE;
+ xbt_die("Internal error in SIMIX_process_resume: unexpected action type %d",
+ process->waiting_action->type);
}
}
else {
return xbt_swag_size(simix_global->process_list);
}
-void* SIMIX_process_self_get_data(void)
+void* SIMIX_process_self_get_data(smx_process_t self)
{
- smx_process_t me = SIMIX_process_self();
- if (!me) {
+ xbt_assert(self == SIMIX_process_self(), "This is not the current process");
+
+ if (!self) {
return NULL;
}
- return SIMIX_process_get_data(me);
+ return SIMIX_process_get_data(self);
}
-void SIMIX_process_self_set_data(void *data)
+void SIMIX_process_self_set_data(smx_process_t self, void *data)
{
- SIMIX_process_set_data(SIMIX_process_self(), data);
+ xbt_assert(self == SIMIX_process_self(), "This is not the current process");
+
+ SIMIX_process_set_data(self, data);
}
void* SIMIX_process_get_data(smx_process_t process)
}
/**
- * Calling this function makes the process to yield.
- * Only the processes can call this function, giving back the control to maestro
+ * \brief Calling this function makes the process to yield.
+ *
+ * Only the current process can call this function, giving back the control to
+ * maestro.
+ *
+ * \param self the current process
*/
-void SIMIX_process_yield(void)
+void SIMIX_process_yield(smx_process_t self)
{
- smx_process_t self = SIMIX_process_self();
-
XBT_DEBUG("Yield process '%s'", self->name);
/* Go into sleep and return control to maestro */
SIMIX_context_suspend(self->context);
/* Ok, maestro returned control to us */
- XBT_DEBUG("Maestro returned control to me: '%s'", self->name);
+ XBT_DEBUG("Control returned to me: '%s'", self->name);
if (self->context->iwannadie){
XBT_DEBUG("I wanna die!");
void SIMIX_process_set_context(smx_process_t p,smx_context_t c) {
p->context = c;
}
+
+/**
+ * \brief Returns the list of processes to run.
+ */
+xbt_dynar_t SIMIX_process_get_runnable(void)
+{
+ return simix_global->process_to_run;
+}
+
+/**
+ * \brief Returns the process from PID.
+ */
+smx_process_t SIMIX_process_from_PID(int PID)
+{
+ smx_process_t proc;
+ xbt_swag_foreach(proc, simix_global->process_list)
+ {
+ if(proc->pid == PID)
+ return proc;
+ }
+ return NULL;
+}
