-int gtnets_initialize(){
- if (gtnets_sim){
- fprintf(stderr, "gtnets already initialized.\n");
- return -1;
+int gtnets_initialize(int wsize){
+ XBT_DEBUG("Using logging.");
+ xbt_assert(!gtnets_sim, "gtnets already initialized");
+
+ if(wsize > 0){
+ XBT_INFO("TCP window maximum size : %d", wsize);
+ gtnets_sim = new GTSim(wsize);
+ }else{
+ gtnets_sim = new GTSim(wsize);