Support priority queue

[ritvikrao]

reconverse/src/scheduler.cpp

Line 143 in 6a7043e

void CsdEnqueueGeneral(void *Message, int strategy, int priobits, int *prioptr){

This is one place we need to modify to insert into a priority queue. We want to support only integer priorities, with priobits=4 always, and prioptr unchanged (same as in Charm++).