topology.h

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#pragma once
 
#include <core/core.h>
 
#include <limits.h>
#include <stdint.h>
 
extern void topology_global_init(void);
 
enum _topology_geometry_t {
        TOPOLOGY_HEXAGON = 1,   
        TOPOLOGY_SQUARE,        
        TOPOLOGY_RING,          
        TOPOLOGY_BIDRING,       
        TOPOLOGY_TORUS,         
        TOPOLOGY_STAR,          
        TOPOLOGY_MESH,          
};
 
enum _direction_t {
        DIRECTION_N,    
        DIRECTION_S,    
        DIRECTION_E,    
        DIRECTION_W,    
        DIRECTION_NE,   
        DIRECTION_SW,   
        DIRECTION_NW,   
        DIRECTION_SE,   
 
        // FIXME this is bad if the n_lps is more than INT_MAX - 1
        DIRECTION_INVALID = INT_MAX     
};
 
extern struct topology_settings_t {
        enum _topology_geometry_t default_geometry;
        lp_id_t out_of_topology;
} topology_settings;
 
extern __attribute__ ((pure)) lp_id_t RegionsCount(void);
extern __attribute__ ((pure)) lp_id_t DirectionsCount(void);
extern __attribute__ ((pure)) lp_id_t GetReceiver(lp_id_t from, enum _direction_t direction);
extern lp_id_t FindReceiver(void);