/* 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 "private.h"
+#include "smx_private.h"
#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)
{
- XBT_DEBUG("Cleanup process %s", process->name);
+ XBT_DEBUG("Cleanup process %s (%p), waiting action %p",
+ process->name, process, process->waiting_action);
+
+ /* cancel non-blocking communications */
+ smx_action_t action;
+ while ((action = xbt_fifo_pop(process->comms))) {
+
+ /* 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, 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) {
+ 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, 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_die("Communication action %p is in my list but I'm not the sender "
+ "or the receiver", action);
+ }
+ }
+
/*xbt_swag_remove(process, simix_global->process_to_run);*/
xbt_swag_remove(process, simix_global->process_list);
xbt_swag_remove(process, process->smx_host->process_list);
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);
}
}
maestro->running_ctx = xbt_new(xbt_running_ctx_t, 1);
XBT_RUNNING_CTX_INITIALIZE(maestro->running_ctx);
maestro->context = SIMIX_context_new(NULL, 0, NULL, NULL, maestro);
- maestro->request.issuer = maestro;
+ maestro->simcall.issuer = maestro;
simix_global->maestro_process = maestro;
return;
* \brief Internal function to create a process.
*
* This function actually creates the process.
- * It may be called when a REQ_PROCESS_CREATE request occurs,
+ * It may be called when a SIMCALL_PROCESS_CREATE simcall occurs,
* or directly for SIMIX internal purposes.
*
* \return the process created
(*process)->name = xbt_strdup(name);
(*process)->smx_host = host;
(*process)->data = data;
+ (*process)->comms = xbt_fifo_new();
+ (*process)->simcall.issuer = *process;
XBT_VERB("Create context %s", (*process)->name);
(*process)->context = SIMIX_context_new(code, argc, argv,
}
}
+/**
+ * \brief Executes the processes from simix_global->process_to_run.
+ *
+ * The processes of simix_global->process_to_run are run (in parallel if
+ * possible). On exit, simix_global->process_to_run is empty, and
+ * simix_global->process_that_ran contains the list of processes that just ran.
+ * The two lists are swapped so, be careful when using them before and after a
+ * call to this function.
+ */
+void SIMIX_process_runall(void)
+{
+ 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;
+ xbt_dynar_reset(simix_global->process_to_run);
+}
+
/**
* \brief Internal function to kill a SIMIX process.
*
- * This function may be called when a REQ_PROCESS_KILL request occurs,
+ * This function may be called when a SIMCALL_PROCESS_KILL simcall occurs,
* or directly for SIMIX internal purposes.
*
* \param process poor victim
process->suspended = 0;
/* FIXME: set doexception to 0 also? */
+ /* destroy the blocking action if any */
if (process->waiting_action) {
switch (process->waiting_action->type) {
break;
case SIMIX_ACTION_COMMUNICATE:
+ xbt_fifo_remove(process->comms, process->waiting_action);
SIMIX_comm_destroy(process->waiting_action);
break;
break;
case SIMIX_ACTION_SYNCHRO:
- SIMIX_synchro_stop_waiting(process, &process->request);
+ SIMIX_synchro_stop_waiting(process, &process->simcall);
SIMIX_synchro_destroy(process->waiting_action);
break;
case SIMIX_ACTION_IO:
- THROW_UNIMPLEMENTED;
- break;
+ SIMIX_io_destroy(process->waiting_action);
+ break;
}
}
}
void SIMIX_process_change_host(smx_process_t process,
- const char *source, const char *dest)
+ smx_host_t dest)
{
- smx_host_t h1 = NULL;
- smx_host_t h2 = NULL;
xbt_assert((process != NULL), "Invalid parameters");
- h1 = SIMIX_host_get_by_name(source);
- h2 = SIMIX_host_get_by_name(dest);
- process->smx_host = h2;
- xbt_swag_remove(process, h1->process_list);
- xbt_swag_insert(process, h2->process_list);
+ xbt_swag_remove(process, process->smx_host->process_list);
+ process->smx_host = dest;
+ xbt_swag_insert(process, dest->process_list);
}
-void SIMIX_pre_process_suspend(smx_req_t req)
+void SIMIX_pre_process_change_host(smx_process_t process, smx_host_t dest)
{
- smx_process_t process = req->process_suspend.process;
- SIMIX_process_suspend(process, req->issuer);
+ process->new_host = dest;
+}
- if (process != req->issuer) {
- SIMIX_request_answer(req);
+void SIMIX_pre_process_suspend(smx_simcall_t simcall)
+{
+ smx_process_t process = simcall->process_suspend.process;
+ SIMIX_process_suspend(process, simcall->issuer);
+
+ if (process != simcall->issuer) {
+ SIMIX_simcall_answer(simcall);
}
- /* If we are suspending ourselves, then just do not replay the request. */
+ /* If we are suspending ourselves, then just do not finish the simcall now */
}
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)
return process->smx_host;
}
-/* needs to be public and without request because it is called
+/* needs to be public and without simcall because it is called
by exceptions and logging events */
const char* SIMIX_process_self_get_name(void) {
return process->properties;
}
-void SIMIX_pre_process_sleep(smx_req_t req)
+void SIMIX_pre_process_sleep(smx_simcall_t simcall)
{
if (MC_IS_ENABLED) {
- MC_process_clock_add(req->issuer, req->process_sleep.duration);
- req->process_sleep.result = SIMIX_DONE;
- SIMIX_request_answer(req);
+ MC_process_clock_add(simcall->issuer, simcall->process_sleep.duration);
+ simcall->process_sleep.result = SIMIX_DONE;
+ SIMIX_simcall_answer(simcall);
return;
}
- smx_action_t action = SIMIX_process_sleep(req->issuer, req->process_sleep.duration);
- xbt_fifo_push(action->request_list, req);
- req->issuer->waiting_action = action;
+ smx_action_t action = SIMIX_process_sleep(simcall->issuer, simcall->process_sleep.duration);
+ xbt_fifo_push(action->simcalls, simcall);
+ simcall->issuer->waiting_action = action;
}
smx_action_t SIMIX_process_sleep(smx_process_t process, double duration)
void SIMIX_post_process_sleep(smx_action_t action)
{
- smx_req_t req;
+ smx_simcall_t simcall;
e_smx_state_t state;
- while ((req = xbt_fifo_shift(action->request_list))) {
+ while ((simcall = xbt_fifo_shift(action->simcalls))) {
switch(surf_workstation_model->action_state_get(action->sleep.surf_sleep)){
case SURF_ACTION_FAILED:
THROW_IMPOSSIBLE;
break;
}
- req->process_sleep.result = state;
- req->issuer->waiting_action = NULL;
- SIMIX_request_answer(req);
+ simcall->process_sleep.result = state;
+ simcall->issuer->waiting_action = NULL;
+ SIMIX_simcall_answer(simcall);
}
SIMIX_process_sleep_destroy(action);
}
XBT_DEBUG("Destroy action %p", action);
if (action->sleep.surf_sleep)
action->sleep.surf_sleep->model_type->action_unref(action->sleep.surf_sleep);
-#ifdef HAVE_TRACING
- TRACE_smx_action_destroy(action);
-#endif
xbt_mallocator_release(simix_global->action_mallocator, action);
}
}
/**
- * 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!");
if (self->doexception) {
XBT_DEBUG("Wait, maestro left me an exception");
self->doexception = 0;
- RETHROW;
+ SMX_THROW();
+ }
+
+ if (self->new_host) {
+ SIMIX_process_change_host(self, self->new_host);
+ self->new_host = NULL;
}
}
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;
+}
