unsigned int System::attainResource(Process *process)
{
wait();
int rtn = 0;
unsigned int requestNum = process->getRequestNeed();
unsigned int available_bk = getAvailable();
unsigned int ownNeed_bk = process->getOwnNeed();
std::string prompt;
if(requestNum <= getAvailable())
{
setAvailable(getAvailable() - requestNum);
process->setOwnNeed(process->getOwnNeed() + requestNum);
prompt = prompt + "\nsystem" + "\t" + std::to_string(available_bk) + '\n';
std::cout << prompt;
prompt.clear();
if(banker(process))
{
processList.insert(process);
prompt = prompt + "Thread" + "\t" + std::to_string(process->getUid()) + "\t" + std::to_string(process->getMaxNeed()) + "\t"
+ std::to_string(process->getOwnNeed()) + "\t" + std::to_string(process->getRequestNeed()) + "\t" + "Success\n";
std::cout << prompt;
rtn = 0;
}
else
{
setAvailable(available_bk);
process->setOwnNeed(ownNeed_bk);
prompt = prompt + "Thread" + "\t" + std::to_string(process->getUid()) + "\t" + std::to_string(process->getMaxNeed()) + "\t"
+ std::to_string(process->getOwnNeed()) + "\t" + std::to_string(process->getRequestNeed()) + "\t" + "Failure\n";
std::cout << prompt;
rtn = 1;
}
printProcessList(std::cout);
}
else
{
rtn = 1;
}
release();
return rtn;
}
/*
* this is the main function. the program starts from here.
* this method:
* 1- read process data from 'input.txt'
* 2- calls another method to start the cpu scheduler
* 3- calls another method to calculates totals and averages
*/
int main(void){
ProcessList *processList = malloc(sizeof(ProcessList));
int isFileExist = readDataFromFile("input.txt", processList);
if(isFileExist != 1){
return -1;
}
//printList(intList);
printf("Here is list of processes and their information that have been loaded from 'input.txt':\n");
printProcessList(processList);
printf("\nNow we start the CPU scheduler using Shortest Job First Schedulling algorithm: \n");
startCPUScheduler(processList);
//printProcessList(processList);
calculateTotals(processList);
printf("Finished\n");
return EXIT_SUCCESS;
}
inline void linux_ps(Monitor* mon)
{
//We can pass in NULL since printProcessList uses DECAF_fprintf
printProcessList(NULL);
}
