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lock_server_cache.h
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lock_server_cache.h
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#ifndef lock_server_cache_h
#define lock_server_cache_h
#include <string>
#include <map>
#include "lock_protocol.h"
#include "rpc.h"
#include "lock_server.h"
#include <queue>
#include <pthread.h>
#include "threaded_queue.h"
class lock_server_cache {
private:
int nacquire;
enum state{
LOCKED = 0x3001,
FREE,
ACQ, //acquiring
REL //releasing
};
enum rpc_enum{ REVOKE, RETRY, RETRY_WAIT };
struct rpc_call{
rpc_enum rpc;
lock_protocol::lockid_t lock_id;
std::string name;
};
struct lock_entry{
std::queue<std::string> waiting;
std::string owner;
state local_state;
lock_entry(){
local_state = FREE;
}
};
threaded_queue<rpc_call> rpc_queue;
map<lock_protocol::lockid_t,lock_entry> lock_map;
pthread_mutex_t mu;
public:
lock_server_cache();
lock_protocol::status stat(lock_protocol::lockid_t, int &);
int acquire(lock_protocol::lockid_t, std::string id, int &);
int release(lock_protocol::lockid_t, std::string id, int &);
int retry_helper(lock_protocol::lockid_t,std::string id,bool wait);
int revoke_helper(lock_protocol::lockid_t,std::string id,int &);
void outgoing();
};
void * dedicated(void * lsc);
#endif