int main(int argc , char ** argv)
{
int i,j ; /* loop index */
int scr_sem; /* id of screen semaphore */
int time; /* current and start time */
int ping,pong; /* id of semaphores to sync processes b & c */
time = Get_Time_Of_Day();
scr_sem = Create_Semaphore ("screen" , 1) ; /* register for screen use */
ping = Create_Semaphore ("ping" , 1) ;
pong = Create_Semaphore ("pong" , 0) ;
for (i=0; i < 5; i++) {
P(pong);
for (j=0; j < 35000; j++);
Print("Ping\n ");
V(ping);
}
time = Get_Time_Of_Day() - time;
P (scr_sem) ;
Print ("Process Ping is done at time: %d\n", time) ;
V(scr_sem);
Destroy_Semaphore(pong);
Destroy_Semaphore(ping);
Destroy_Semaphore(scr_sem);
return (0);
}
int main() {
int x = 2;
Get_NewTOD(&x);
Print("%d\n", x);
int y = Get_Time_Of_Day();
Print("%d\n", y);
return 0;
}
int main(int argc, char **argv)
{
int i, j ; /* loop index */
int scr_sem; /* id of screen semaphore */
int now, start, elapsed;
start = Get_Time_Of_Day();
scr_sem = Create_Semaphore ("screen" , 1) ; /* register for screen use */
for (i=0; i < 200; i++) {
for (j=0 ; j < 10000 ; j++) ;
now = Get_Time_Of_Day();
}
elapsed = Get_Time_Of_Day() - start;
P (scr_sem) ;
Print("Process Long is done at time: %d\n", elapsed) ;
V(scr_sem);
return 0;
}
int main(int argc , char ** argv)
{
int i,j ; /* loop index */
int start_sem;
int scr_sem; /* id of screen semaphore */
int time; /* current and start time */
int ping,pong; /* id of semaphores to sync processes b & c */
time = Get_Time_Of_Day();
start_sem = Create_Semaphore ("start" , 1);
scr_sem = Create_Semaphore ("screen" , 1) ; /* register for screen use */
ping = Create_Semaphore ("ping" , 1) ;
pong = Create_Semaphore ("pong" , 0) ;
P (start_sem) ;
V (start_sem) ;
for (i=0; i < 50; i++) {
P(ping);
for (j=0; j < 35; j++);
P(scr_sem);
Set_Attr(ATTRIB(BLACK, BLUE|BRIGHT));
Print("Pong");
Set_Attr(ATTRIB(BLACK, GRAY));
V(scr_sem);
V(pong);
}
time = Get_Time_Of_Day() - time;
P(scr_sem) ;
Print ("\nProcess #Pong is done at time: %d\n", time) ;
V(scr_sem);
return (0);
}
int main(int argc, char **argv) {
int policy = -1;
int start;
int elapsed;
int scr_sem; /* sid of screen semaphore */
int id1, id2, id3; /* ID of child process */
if(argc == 2) {
if(!strcmp(argv[1], "rr")) {
policy = 0;
} else if(!strcmp(argv[1], "mys")) {
policy = 1;
} else {
Print("usage: %s [rr|mys]\n", argv[0]);
Exit(1);
}
Set_Scheduling_Policy(policy, 20);
} else {
Print("usage: %s [rr|mys]\n", argv[0]);
Exit(1);
}
start = Get_Time_Of_Day();
scr_sem = Open_Semaphore("screen", 1);
P(scr_sem);
Print("************* Start Workload Generator *********\n");
V(scr_sem);
id1 = Spawn_Program("/c/long.exe", "/c/long.exe", 0);
P(scr_sem);
Print("Process Long has been created with ID = %d\n", id1);
V(scr_sem);
id2 = Spawn_Program("/c/long.exe", "/c/long.exe", 0);
P(scr_sem);
Print("Process Long #1 has been created with ID = %d\n", id2);
V(scr_sem);
#ifdef notdef
id2 = Spawn_Program("/c/ping.exe", "/c/ping.exe", 0);
P(scr_sem);
Print("Process Ping has been created with ID = %d\n", id2);
V(scr_sem);
id3 = Spawn_Program("/c/pong.exe", "/c/pong.exe", 0);
P(scr_sem);
Print("Process Pong has been created with ID = %d\n", id3);
V(scr_sem);
#endif
Wait(id1);
Wait(id2);
// Wait(id3);
elapsed = Get_Time_Of_Day() - start;
Print("\nTests Completed at %d\n", elapsed);
return 0;
}
* enrolled in similar operating systems courses the University of Maryland's CMSC412 course.
*/
#include <conio.h>
#include <process.h>
#include <sched.h>
#include <sema.h>
#include <string.h>
int main(int argc __attribute__ ((unused)), char **argv
__attribute__ ((unused))) {
int i, j; /* loop index */
int scr_sem; /* id of screen semaphore */
int time; /* current and start time */
int ping, pong; /* id of semaphores to sync processes b & c */
time = Get_Time_Of_Day();
scr_sem = Open_Semaphore("screen", 1); /* register for screen use */
ping = Open_Semaphore("ping", 1);
pong = Open_Semaphore("pong", 0);
for (i = 0; i < 5; i++) {
P(ping);
P(scr_sem);
Print("Pong\n");
V(scr_sem);
for (j = 0; j < 35; j++);
V(pong);
}
