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#ifndef __DGL_H_
#define __DGL_H_
#include <litmus/color.h>
#include <linux/list.h>
/*
* A request for @replica amount of a single resource.
*/
struct dgl_req {
unsigned short replicas;
struct list_head list;
struct dgl_group_req *greq;
};
/*
* Simultaneous @requests for multiple resources.
*/
struct dgl_group_req {
int cpu;
unsigned long *requested;
unsigned long *waiting;
struct dgl_req *requests;
unsigned long long ts;
};
/*
* A single resource.
*/
struct dgl_resource {
unsigned long free_replicas;
struct list_head waiting;
};
/*
* A group of resources.
*/
struct dgl {
struct dgl_resource *resources;
struct dgl_group_req* *acquired;
char requests;
char running;
unsigned long long ts;
unsigned long num_resources;
unsigned long num_replicas;
};
void dgl_init(struct dgl *dgl, unsigned long num_resources,
unsigned long num_replicas);
void dgl_free(struct dgl *dgl);
void dgl_group_req_init(struct dgl *dgl, struct dgl_group_req *greq);
void dgl_group_req_free(struct dgl_group_req *greq);
void set_req(struct dgl *dgl, struct dgl_group_req *greq,
int resource, int replicas);
void add_group_req(struct dgl *dgl, struct dgl_group_req *greq, int cpu);
void remove_group_req(struct dgl *dgl, struct dgl_group_req *greq);
#endif
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