int main()
{
atexit(cleanup);
mbox_create();
mbox_read(STDIN_FILENO);
for(;;)
{
mbox_write();
mbox_log();
}
}
void main (int argc, char *argv[])
{
int numprocs; // Used to store number of processes to create
int i; // Loop index variable
missile_code mc; // Used as message for mailbox
int num_N2; //numer of N2 injection
int num_H2O; //number of H2O injection
int num_N2_2N; //number of reaction1
int num_H2O_H2_O2; //number of reaction2
int num_N_O2_NO2; //number of reaction3
int number_N2; //number of N2 molecules
int number_H2O; //number of H2O molecules
mbox_t mbox_N2; //N2 mailbox
mbox_t mbox_N; //N mailbox
mbox_t mbox_H2O; //H2O mailbox
mbox_t mbox_H2; //H2 mailbox
mbox_t mbox_O2; //O2 mailbox
mbox_t mbox_NO2; //NO2 mailbox
sem_t s_procs_completed; // Semaphore used to wait until all spawned processes have completed
char mbox_N2_str[10]; // Used as command-line argument to pass mem_handle to new processes
char mbox_N_str[10];
char mbox_H2O_str[10];
char mbox_H2_str[10];
char mbox_O2_str[10];
char mbox_NO2_str[10];
char s_procs_completed_str[10]; // Used as command-line argument to pass page_mapped handle to new processes
if (argc != 3) {
Printf("Usage: ");Printf(argv[0]);Printf("<number of N2 molecules> <number of H2O molecules\n");
Exit();
}
// Convert string from ascii command line argument to integer number
number_N2 = dstrtol(argv[1],NULL,10); //the "10" means base 10
number_H2O = dstrtol(argv[2],NULL,10);
if(number_H2O%2 ==1){
num_H2O = number_H2O;
num_H2O_H2_O2 = (number_H2O-1)/2;
num_N2 = number_N2;
num_N2_2N = number_N2;
if (2*num_N2>num_H2O_H2_O2){ //number of N larger than number of O2
num_N_O2_NO2 = num_H2O_H2_O2;
}
else{
num_N_O2_NO2 = 2*num_N2;
}
}
else{
num_H2O = number_H2O;
num_H2O_H2_O2 =(number_H2O)/2;
num_N2 = number_N2;
num_N2_2N = number_N2;
if (2*num_N2>num_H2O_H2_O2){ //number of N larger than number of O2
num_N_O2_NO2 = num_H2O_H2_O2;
}
else{
num_N_O2_NO2 = 2*num_N2;
}
}
numprocs=num_H2O+num_N2+num_H2O_H2_O2+num_N2_2N+num_N_O2_NO2;
// Allocate space for a mailbox
if ((mbox_N2 = mbox_create()) == MBOX_FAIL) {
Printf("makeprocs (%d): ERROR: could not allocate mailbox!", getpid());
Exit();
}
if ((mbox_N = mbox_create()) == MBOX_FAIL) {
Printf("makeprocs (%d): ERROR: could not allocate mailbox!", getpid());
Exit();
}
if ((mbox_O2 = mbox_create()) == MBOX_FAIL) {
Printf("makeprocs (%d): ERROR: could not allocate mailbox!", getpid());
Exit();
}
if ((mbox_NO2 = mbox_create()) == MBOX_FAIL) {
Printf("makeprocs (%d): ERROR: could not allocate mailbox!", getpid());
Exit();
}
if ((mbox_H2O = mbox_create()) == MBOX_FAIL) {
Printf("makeprocs (%d): ERROR: could not allocate mailbox!", getpid());
Exit();
}
if ((mbox_H2 = mbox_create()) == MBOX_FAIL) {
Printf("makeprocs (%d): ERROR: could not allocate mailbox!", getpid());
Exit();
}
// Open mailbox to prevent deallocation
if (mbox_open(mbox_N2) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not open mailbox %d!\n", getpid(), mbox_N2);
Exit();
}
if (mbox_open(mbox_N) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not open mailbox %d!\n", getpid(), mbox_N);
Exit();
}
if (mbox_open(mbox_H2O) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not open mailbox %d!\n", getpid(), mbox_H2O);
Exit();
}
if (mbox_open(mbox_H2) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not open mailbox %d!\n", getpid(), mbox_H2);
Exit();
}
if (mbox_open(mbox_O2) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not open mailbox %d!\n", getpid(), mbox_O2);
Exit();
}
if (mbox_open(mbox_NO2) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not open mailbox %d!\n", getpid(), mbox_NO2);
Exit();
}
// Put some values in the mc structure to send as a message
mc.numprocs = numprocs;
mc.really_important_char = 'A';
// Create semaphore to not exit this process until all other processes
// have signalled that they are complete. To do this, we will initialize
// the semaphore to (-1) * (number of signals), where "number of signals"
// should be equal to the number of processes we're spawning - 1. Once
// each of the processes has signaled, the semaphore should be back to
// zero and the final sem_wait below will return.
if ((s_procs_completed = sem_create(-(numprocs-1))) == SYNC_FAIL) {
Printf("makeprocs (%d): Bad sem_create\n", getpid());
Exit();
}
// Setup the command-line arguments for the new process. We're going to
// pass the handles to the shared memory page and the semaphore as strings
// on the command line, so we must first convert them from ints to strings.
ditoa(mbox_N2, mbox_N2_str);
ditoa(mbox_H2O, mbox_H2O_str);
ditoa(mbox_N, mbox_N_str);
ditoa(mbox_H2, mbox_H2_str);
ditoa(mbox_O2, mbox_O2_str);
ditoa(mbox_NO2, mbox_NO2_str);
ditoa(s_procs_completed, s_procs_completed_str);
// Now we can create the processes. Note that you MUST end your call to
// process_create with a NULL argument so that the operating system
// knows how many arguments you are sending.
for(i=0; i<num_N2; i++) {
process_create(FILENAME_TO_RUN_0, 0, 0, mbox_N2_str,s_procs_completed_str, NULL);
// Printf("makeprocs (%d): Process %d created\n", getpid(), i);
}
for(i=0; i<num_H2O; i++) {
process_create(FILENAME_TO_RUN_1, 0, 0, mbox_H2O_str, s_procs_completed_str, NULL);
// Printf("makeprocs (%d): Process %d created\n", getpid(), i);
}
for(i=0; i<num_N2_2N; i++) {
process_create(FILENAME_TO_RUN_2, 0, 0, mbox_N2_str,mbox_N_str, s_procs_completed_str, NULL);
// Printf("makeprocs (%d): Process %d created\n", getpid(), i);
}
for(i=0; i<num_H2O_H2_O2; i++) {
process_create(FILENAME_TO_RUN_3, 0, 0, mbox_H2O_str,mbox_H2_str,mbox_O2_str, s_procs_completed_str, NULL);
// Printf("makeprocs (%d): Process %d created\n", getpid(), i);
}
for(i=0; i<num_N_O2_NO2; i++) {
process_create(FILENAME_TO_RUN_4, 0, 0, mbox_N_str,mbox_O2_str,mbox_NO2_str, s_procs_completed_str, NULL);
// Printf("makeprocs (%d): Process %d created\n", getpid(), i);
}
// And finally, wait until all spawned processes have finished.
if (sem_wait(s_procs_completed) != SYNC_SUCCESS) {
Printf("Bad semaphore s_procs_completed (%d) in ", s_procs_completed); Printf(argv[0]); Printf("\n");
Exit();
}
if (mbox_close(mbox_N2) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not close mailbox %d!\n", getpid(), mbox_N2);
Exit();
}
if (mbox_close(mbox_N) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not close mailbox %d!\n", getpid(), mbox_N);
Exit();
}
if (mbox_close(mbox_O2) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not close mailbox %d!\n", getpid(), mbox_O2);
Exit();
}
if (mbox_close(mbox_NO2) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not close mailbox %d!\n", getpid(), mbox_NO2);
Exit();
}
if (mbox_close(mbox_H2O) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not close mailbox %d!\n", getpid(), mbox_H2O);
Exit();
}
if (mbox_close(mbox_H2) == MBOX_FAIL) {
Printf("makeprocs (%d): Could not close mailbox %d!\n", getpid(), mbox_H2);
Exit();
}
Printf("makeprocs (%d): All other processes completed, exiting main process.\n", getpid());
}
