From: Martin Quinson <martin.quinson@loria.fr>
Date: Thu, 15 Jun 2017 15:30:59 +0000 (+0200)
Subject: LMM: add a function to see how many variables are active on a constraint
X-Git-Tag: v3.16~85
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/f601750c63a340979328ed9817fe225c5ce43959?hp=befbbbe1fbb31663a8f91e24ce12df271cf4ae79

LMM: add a function to see how many variables are active on a constraint
---

diff --git a/src/include/surf/maxmin.h b/src/include/surf/maxmin.h
index 7365bfaa41..df7571f3dc 100644
--- a/src/include/surf/maxmin.h
+++ b/src/include/surf/maxmin.h
@@ -203,6 +203,8 @@ XBT_PUBLIC(void) lmm_constraint_free(lmm_system_t sys, lmm_constraint_t cnst);
  */
 XBT_PUBLIC(double) lmm_constraint_get_usage(lmm_constraint_t cnst);
 
+XBT_PUBLIC(int) lmm_constraint_get_variable_amount(lmm_constraint_t cnst);
+
 /**
  * @brief Sets the concurrency limit for this constraint
  * @param cnst A constraint
diff --git a/src/surf/maxmin.cpp b/src/surf/maxmin.cpp
index 3d9da37aec..5876ad7d40 100644
--- a/src/surf/maxmin.cpp
+++ b/src/surf/maxmin.cpp
@@ -1245,6 +1245,18 @@ double lmm_constraint_get_usage(lmm_constraint_t cnst) {
    }
   return usage;
 }
+int lmm_constraint_get_variable_amount(lmm_constraint_t cnst) {
+  int usage = 0;
+  xbt_swag_t elem_list = &(cnst->enabled_element_set);
+  void *_elem;
+
+  xbt_swag_foreach(_elem, elem_list) {
+    lmm_element_t elem = (lmm_element_t)_elem;
+    if (elem->value > 0)
+      usage++;
+  }
+ return usage;
+}
 
 void lmm_check_concurrency(lmm_system_t sys){
   //These checks are very expensive, so do them only if we want to debug SURF LMM