#ifndef DEF_REQUEST_H
#define DEF_REQUEST_H
#include "object.h"
#define RS_PENDING 0
#define RS_PROCESSED 1
#define RS_FINISHED 2
#define RS_INTERRUPTED 3
#define PT_VOID 0
#define PT_OBJDESC 1
#define PT_LONG 2
#define PT_LONGLONG 3 //for return values
#define PT_SHM 3 //for parameters
struct request {
struct object *obj;
struct thread *requester; //0 if nonblocking message
uint32_t func, params[3], obj_close[3]; //obj_close : object descriptors to close when requests yields an answer
struct segment_map *shm_sndr[3], *shm_rcv[3];
int acknowledged; // (only for blocking requests) 0 : request is pending, 1 : request is being processes, 2 : finished, 3 : interrupted
union {
int64_t ll;
uint32_t n;
} answer;
int errcode; //returned when function has finished
int pid; //pid of caller
};
struct user_request {
uint32_t func, params[3], shmsize[3];
int isBlocking; // 1 : blocking request, 0 : nonblocking request (message)
int pid; //pid of caller process
};
struct user_sendrequest {
uint32_t func, a, b, c;
uint32_t answeri;
int64_t answerll;
int errcode;
};
//syscalls
int request_get(int obj, uint32_t ptr, int wait);
int request_has(int obj);
void request_answer(int obj, uint32_t answer, uint32_t answer2, int errcode); //answer2 used for long long.
int request_mapShm(int obj, uint32_t pos, int number);
int request(int obj, uint32_t rq_ptr);
int send_msg(int obj, uint32_t rq_ptr);
#endif
