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Binarysem

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binarysem MUTEXA, MUTEXB, MUTEXC, MUTEXD, MUTEXE; semaphore FULLA, FULLB, FULLC, FULLD, FULLE; semaphore OUTPUT; semaphore request[5]; semaphore ioreq; semaphore pending1, pending2; semaphore physical1, physical2; semaphore complete1, complete2; //Constants to loop for 5 users const int operate = 25; const int length = 1; const int USER = 5; //buffers for the user and DOIO functions int z = 0; int userID, address, locate; int bufID[length]; int bufADDR[length]; int bufDEV[length]; //IORQ variables int iorqID1[length]; int iorqADDR1[length]; int iorqID2[length]; int iorqADDR2[length]; //seek is for dummy loops int seekA = 0, seekB = 0; int deviceADDR1[length]; int deviceID1; int deviceADDR2[length]; int deviceID2; //User Function void …show more content…

//loop for if the device is equal to 1 if(tempDEV == 1) { p(FULLB); p(MUTEXB); k = 0; iorqID1[j] = tempID; iorqADDR1[j] = tempADDR; // store IORQ into temps j++; //increment j and then loop j for the length if(j == length) { j = 0; } k = 0; v(MUTEXB); v(pending1); } //if length isnt 1 then store in the third full and mutex else { p(FULLC); p(MUTEXC); //IORQ is stored again in a temp variable addr and id iorqID2[j] = tempID; iorqADDR2[j] = tempADDR; j++; //incremented and then the length of j and again reset to zero if(j == length) { j = 0; } k = 0; v(MUTEXC); v(pending2); } } } void DDriver1() { int tempID, tempADDR; int i, k, j = 0; //variables for temporary storage for(i = 0; i < operate; i++) { //the device id is stored into the IORQ id deviceID1 = iorqID1[j]; p(pending1); //then looped for the 25 IORB if(z == 25) { v(pending1); //break out of loop if the request hits break; } //store in second mutex and then output p(MUTEXB); p(OUTPUT); k = 0; cout << "Driver initiates I/O operation for user " << deviceID1 << "." << endl;

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