--- /dev/null
+/* Copyright (c) 2008-2014. The SimGrid Team.
+ * All rights reserved. */
+
+/* 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 <simgrid/simix.h>
+
+#include "mc_base.h"
+#include "../simix/smx_private.h"
+#include "mc_record.h"
+
+XBT_LOG_NEW_CATEGORY(mc, "All MC categories");
+
+/**
+ * \brief Schedules all the process that are ready to run
+ */
+void MC_wait_for_requests(void)
+{
+ smx_process_t process;
+ smx_simcall_t req;
+ unsigned int iter;
+
+ while (!xbt_dynar_is_empty(simix_global->process_to_run)) {
+ SIMIX_process_runall();
+ xbt_dynar_foreach(simix_global->process_that_ran, iter, process) {
+ req = &process->simcall;
+ if (req->call != SIMCALL_NONE && !MC_request_is_visible(req))
+ SIMIX_simcall_handle(req, 0);
+ }
+ }
+}
+
+int MC_request_is_enabled(smx_simcall_t req)
+{
+ unsigned int index = 0;
+ smx_synchro_t act = 0;
+
+ switch (req->call) {
+ case SIMCALL_NONE:
+ return FALSE;
+
+ case SIMCALL_COMM_WAIT:
+ /* FIXME: check also that src and dst processes are not suspended */
+ act = simcall_comm_wait__get__comm(req);
+ if (simcall_comm_wait__get__timeout(req) >= 0) {
+ /* If it has a timeout it will be always be enabled, because even if the
+ * communication is not ready, it can timeout and won't block. */
+ if (_sg_mc_timeout == 1)
+ return TRUE;
+ } else {
+ /* On the other hand if it hasn't a timeout, check if the comm is ready.*/
+ if (act->comm.detached && act->comm.src_proc == NULL
+ && act->comm.type == SIMIX_COMM_READY)
+ return (act->comm.dst_proc != NULL);
+ }
+ return (act->comm.src_proc && act->comm.dst_proc);
+
+ case SIMCALL_COMM_WAITANY:
+ /* Check if it has at least one communication ready */
+ xbt_dynar_foreach(simcall_comm_waitany__get__comms(req), index, act)
+ if (act->comm.src_proc && act->comm.dst_proc)
+ return TRUE;
+ return FALSE;
+
+ default:
+ /* The rest of the requests are always enabled */
+ return TRUE;
+ }
+}
+
+int MC_request_is_visible(smx_simcall_t req)
+{
+ return req->call == SIMCALL_COMM_ISEND
+ || req->call == SIMCALL_COMM_IRECV
+ || req->call == SIMCALL_COMM_WAIT
+ || req->call == SIMCALL_COMM_WAITANY
+ || req->call == SIMCALL_COMM_TEST
+ || req->call == SIMCALL_COMM_TESTANY
+ || req->call == SIMCALL_MC_RANDOM
+#ifdef HAVE_MC
+ || req->call == SIMCALL_MC_SNAPSHOT
+ || req->call == SIMCALL_MC_COMPARE_SNAPSHOTS
+#endif
+ ;
+}
+
+int MC_random(int min, int max)
+{
+ /*FIXME: return mc_current_state->executed_transition->random.value; */
+ return simcall_mc_random(min, max);
+}
+
+static int prng_random(int min, int max)
+{
+ unsigned long output_size = ((unsigned long) max - (unsigned long) min) + 1;
+ unsigned long input_size = (unsigned long) RAND_MAX + 1;
+ unsigned long reject_size = input_size % output_size;
+ unsigned long accept_size = input_size - reject_size; // module*accept_size
+
+ // Use rejection in order to avoid skew
+ long x;
+ do {
+ x = random();
+ } while( x >= accept_size );
+ return min + (x % output_size);
+}
+
+int simcall_HANDLER_mc_random(smx_simcall_t simcall, int min, int max)
+{
+ if (!MC_is_active() && !MC_record_path){
+ return prng_random(min, max);
+ }
+
+ return simcall->mc_value;
+}
