void main (int argc, char *argv[])
{
sem_t s_procs_completed; // Semaphore to signal the process that we're done
sem_t s_N2; //Semaphore as N2
int num_N2; //Number of N2
int i; //index var
if (argc != 4) {
Printf("Usage: "); Printf(argv[0]); Printf(" <handle_to_pass_complete_signal><s_procs_completed_str> <s_N2_str> <num_N2_str>\n");
Exit();
}
// Convert the command-line strings into integers for use as handles
s_procs_completed = dstrtol(argv[1], NULL, 10);
s_N2 = dstrtol(argv[2],NULL,10);
num_N2 =dstrtol(argv[3],NULL,10);
for(i=0;i<num_N2;i++){
Printf("Inject a N2\n");
sem_signal(s_N2);
}
// Signal the semaphore to tell the original process that we're done
// Printf("injection_n2 completed!\n");
if(sem_signal(s_procs_completed) != SYNC_SUCCESS) {
Printf("Bad semaphore s_procs_completed (%d) in ", s_procs_completed); Printf(argv[0]); Printf(", exiting...\n");
Exit();
}
}
client()
{
int i;
/*
* Tell the server we're here and ready,
* then just receive while the server sends us things.
*/
sem_wait(clisem); /* get control of shared memory */
mesgptr->mesg_len = MESGLEN;
mesgptr->mesg_type = MESGLEN;
sem_signal(servsem); /* wake up server */
for (i = 0; i < NUMMESG; i++) {
sem_wait(clisem); /* wait for server */
if (mesgptr->mesg_len != MESGLEN)
err_sys("client: incorrect length");
if (mesgptr->mesg_type != (i + 1))
err_sys("client: incorrect type");
sem_signal(servsem); /* wake up server */
}
}
void main (int argc, char *argv[])
{
sem_t s_procs_completed; // Semaphore to signal the process that we're done
sem_t s_N; //Semaphore N
sem_t s_O2; //Semaphore O2
sem_t s_NO2; //Semaphore NO2
int num_N_O2_NO2; //number of reaction
int i; //index var
if (argc != 6) {
Printf("Usage: "); Printf(argv[0]); Printf(" <handle_to_signal_complete><s_H2O> <s_H2> <s_O2> <num_H2O_H2_O2> \n");
Exit();
}
// Convert the command-line strings into integers for use as handles
s_procs_completed = dstrtol(argv[1], NULL, 10);
s_N =dstrtol(argv[2],NULL,10);
s_O2 =dstrtol(argv[3],NULL,10);
s_NO2 =dstrtol(argv[4],NULL,10);
num_N_O2_NO2 = dstrtol(argv[5],NULL,10);
for(i=0;i<num_N_O2_NO2;i++){
sem_wait(s_N);
sem_wait(s_O2);
Printf("Create a NO2\n");
sem_signal(s_NO2);
}
// Printf("reaction3 completed\n");
if(sem_signal(s_procs_completed) != SYNC_SUCCESS) {
Printf("Bad semaphore s_procs_completed (%d) in ", s_procs_completed); Printf(argv[0]); Printf(", exiting...\n");
Exit();
}
}
void canarrive(void* daddy) {
sem_acquire(&lock);
numcan++;
if(numcan == 3 || (numcan > 0 && nummiss == 2)){
sem_signal(&can);
sem_signal(&can);
printf(1, "\nRow Boat");
if (nummiss == 3){
printf(1, " with 3 missionaries");
nummiss = 0;
}
else if(numcan == 3){
printf(1, " with 3 cannibals");
numcan = 0;
}
else{
printf(1, " with 1 cannibal 2 missionaries");
numcan = numcan - 1;
nummiss = nummiss -2;
}
}
sem_signal(&lock);
texit();
}
void dominant_monkey_climb()
{
sem_acquire(&tree);
printf(1,"dominant Monkey %d gets coconut\n", getpid());
sem_signal(&tree);
sem_signal(&dominant_monkey);
texit();
}
/* Transfer one packet of data from the AICA->SH4 queue. Expects to
find AICA_CMD_MAX_SIZE dwords of space available. Returns -1
if failure, 0 for no packets available, 1 otherwise. Failure
might mean a permanent failure since the queue is probably out of sync. */
int snd_aica_to_sh4(void *packetout) {
uint32 bot, start, stop, top, size, cnt, *pkt32;
sem_wait(sem_qram);
/* Set these up for reference */
bot = SPU_RAM_BASE + AICA_MEM_RESP_QUEUE;
assert_msg( g2_read_32(bot + offsetof(aica_queue_t, valid)), "Queue is not yet valid" );
top = SPU_RAM_BASE + AICA_MEM_RESP_QUEUE + g2_read_32(bot + offsetof(aica_queue_t, size));
start = SPU_RAM_BASE + AICA_MEM_RESP_QUEUE + g2_read_32(bot + offsetof(aica_queue_t, tail));
stop = SPU_RAM_BASE + AICA_MEM_RESP_QUEUE + g2_read_32(bot + offsetof(aica_queue_t, head));
cnt = 0;
pkt32 = (uint32 *)packetout;
/* Is there anything? */
if (start == stop) {
sem_signal(sem_qram);
return 0;
}
/* Check for packet size overflow */
size = g2_read_32(start + offsetof(aica_cmd_t, size));
if (cnt >= AICA_CMD_MAX_SIZE) {
sem_signal(sem_qram);
dbglog(DBG_ERROR, "snd_aica_to_sh4(): packet larger than %d dwords\n", AICA_CMD_MAX_SIZE);
return -1;
}
/* Find stop point for this packet */
stop = start + size*4;
if (stop > top)
stop -= top - (SPU_RAM_BASE + AICA_MEM_RESP_QUEUE);
while (start != stop) {
/* Fifo wait if necessary */
if (!(cnt % 8))
g2_fifo_wait();
cnt++;
/* Read the next dword */
*pkt32++ = g2_read_32(start);
/* Move our counters */
start += 4;
if (start >= top)
start = bot;
cnt++;
}
/* Finally, write a new tail value to signify that we've removed a packet */
g2_write_32(bot + offsetof(aica_queue_t, tail), start - (SPU_RAM_BASE + AICA_MEM_RESP_QUEUE));
sem_signal(sem_qram);
return 1;
}
void barber() {
while(true) {
sem_wait(customer_waiting);
sem_wait(seats_mutex);
free_seats++;
cut_hair();
sem_signal(barber_sleeping);
sem_signal(seats_mutex);
}
}
void oReady(void *arg_ptr) {
sem_acquire(&h);
sem_acquire(&h);
sem_signal(&o);
sem_signal(&o);
lock_acquire(&mutex);
water_molecules++;
lock_release(&mutex);
texit();
}
BOOL append_fat (VOL_PTR tab , const dword chain, dword * addr) {
fat_ptr fat=NULL;
dword cluster_ultimo=0, cluster_new=0;
if(!(tab)) {
set_errno(EINVAL,"Volume errato (%s-line%d)", __FILE__, __LINE__);
return FALSE;
}
if(chain <2 ) {
set_errno(EINVAL,"Cluster riservato");
return FALSE;
}
fat=tab->fat;
sem_wait(tab->sem_fat);
if(!get_ultimo_fat(fat, chain, &cluster_ultimo)) {
sem_signal(tab->sem_fat);
return FALSE;
}
if(!getFree_fat(fat, tab->size_fat,&cluster_new)) {
sem_signal(tab->sem_fat);
return FALSE;
}
//devo scrivere nell'ultimo l'indirizzo del nuovo cluster
if(!scrivi_fat(tab, cluster_ultimo, cluster_new)) {
sem_signal(tab->sem_fat);
return FALSE;
}
if(!scrivi_fat(tab, cluster_new, EOC_32)) {
// se fallisce provo a ripristinare la situazione precedente
if(!scrivi_fat(tab, cluster_ultimo, EOC_32))
set_errno(EIO,"Errore irrecuperabile, possibile perdita di dati");
sem_signal(tab->sem_fat);
return FALSE;
}
// ... ----->Ultimo---->new(EOC);
// finito inserimento
sem_signal(tab->sem_fat);
if(addr)
*addr=cluster_new;
return TRUE;
}
void main(int argc, char ** argv)
{
uint32 h_mem;
sem_t s_procs_completed;
Molecules * mols;
int ct;
if (argc != 3) {
Printf("Usage: ");
Printf(argv[0]);
Printf(" <handle_to_shared_memory_page> <handle_to_page_mapped_semaphore>\n");
Exit();
}
// Convert the command-line strings into integers for use as handles
h_mem = dstrtol(argv[1], NULL, 10); // The "10" means base 10
s_procs_completed = dstrtol(argv[2], NULL, 10);
// Map shared memory page into this process's memory space
if ((mols = (Molecules *) shmat(h_mem)) == NULL) {
Printf("Could not map the shared page to virtual address in ");
Printf(argv[0]);
Printf(", exiting..\n");
Exit();
}
for(ct = 0; ct < mols->init_so4; ct++) {
// Consume SO4
sem_wait(mols->so4);
// Produce so2
sem_signal(mols->so2);
Printf("A molecule SO2 is created\n");
// Produce O2
sem_signal(mols->o2);
Printf("A molecule O2 is created\n");
}
// Signal the semaphore to tell the original process that we're done
Printf("Reaction 2: PID %d is complete.\n", getpid());
if(sem_signal(s_procs_completed) != SYNC_SUCCESS) {
Printf("Bad semaphore s_procs_completed (%d) in ", s_procs_completed);
Printf(argv[0]);
Printf(", exiting...\n");
Exit();
}
return;
}
void CannibalArrives()
{
sem_aquire(&boat);
sem_aquire(&display);
printf(1, "1: (%d) cannibal arrived, %d, %d\n", getpid(), total, con);
sem_signal(&display);
sem_aquire(&mutex2);
while(total + 2 == 5) { con++;
sem_signal(&mutex2);
sem_signal(&boat);
sem_aquire(&display);
printf(1, "1: (%d) cannibal denied boarding, %d, %d\n", getpid(), total, con);
sem_signal(&display);
sem_aquire(&prevention);
sem_aquire(&display);
printf(1, "1: (%d) cannibal prevented meal, %d, %d\n", getpid(), total, con);
sem_signal(&display);
sem_aquire(&boat);
sem_aquire(&mutex2);
}
sem_signal(&mutex2);
sem_aquire(&mutex2);
total += 2;
sem_signal(&mutex2);
sem_aquire(&display);
printf(1, "2: (%d) cannibal enters boat, %d, %d\n", getpid(), total, con);
sem_signal(&display);
sem_aquire(&mutex);
bp++;
sem_signal(&mutex);
if (bp < 3) sem_aquire(&loading);
// sem_aquire(&display);
// printf(1, "bp cannibal: %d\n", bp);
// sem_signal(&display);
RowBoat();
sem_signal(&loading);
texit();
}
static void cb_default(const char *str) {
cb_sem_data_t *t;
t = malloc(sizeof(cb_sem_data_t));
sem_wait(cb_mutex);
strncpy(t->line, str, 255); t->line[255] = '\0';
t->next = (cb_sem_data_t *)cb_queue;
cb_queue = t;
sem_signal(cb_mutex);
sem_signal(cb_sem);
}
void oReady(void* v)
{
sem_acquire(&h);
sem_acquire(&h);
sem_signal(&o);
sem_signal(&o);
sem_acquire(&l);
water++;
printf(1,"water molecule created\n");
sem_signal(&l);
texit();
}
void MissionaryArrives()
{
sem_aquire(&boat);
sem_aquire(&display);
printf(1, "1: (%d) missionary arrived, %d, %d\n", getpid(), total, con);
sem_signal(&display);
sem_aquire(&mutex2);
while(total + 1 == 5){ con++;
sem_signal(&mutex2);
sem_signal(&boat);
sem_aquire(&display);
printf(1, "1: (%d) missionary denied boarding, %d, %d\n", getpid(), total, con);
sem_signal(&display);
sem_aquire(&prevention);
sem_aquire(&display);
printf(1, "1: (%d) missionary prevented death, %d, %d\n", getpid(), total, con);
sem_signal(&display);
sem_aquire(&boat);
sem_aquire(&mutex2);
}
sem_signal(&mutex2);
sem_aquire(&mutex2);
total += 1;
sem_signal(&mutex2);
sem_aquire(&display);
printf(1, "2: (%d) missionary enters boat, %d, %d\n", getpid(), total, con);
sem_signal(&display);
sem_aquire(&mutex);
bp++;
sem_signal(&mutex);
if (bp < 3) sem_aquire(&loading);
// sem_aquire(&display);
// printf(1, "bp missionary: %d\n", bp);
// sem_signal(&display);
RowBoat();
sem_signal(&loading);
texit();
}
void customer() {
sem_wait(seats_mutex);
if(free_seats > 0) {
free_seats--;
sem_signal(customer_waiting);
sem_signal(seats_mutex);
sem_wait(barber_sleeping);
get_haircut();
}
else {
sem_signal(seats_mutex);
leave();
}
}
BOOL delete_fat (VOL_PTR tab, const dword chain) {
fat_ptr fat=NULL;
dword cluster_ultimo=0,cluster_penultimo=0;
dword backup=0;
if(!(tab)) {
set_errno(EINVAL,"Volume errato (%s-line%d)", __FILE__, __LINE__);
return FALSE;
}
if(chain < 2) {
set_errno(1,"Cluster riservati");
return FALSE;
}
fat=tab->fat;
leggi_fat(fat,cluster_penultimo,&backup);
sem_wait(tab->sem_fat);
if(!get_ultimo_fat(fat, chain, &cluster_ultimo)) {
sem_signal(tab->sem_fat);
return FALSE;
}
if(!get_penUltimo_fat(fat, chain, &cluster_penultimo)) {
sem_signal(tab->sem_fat);
return FALSE;
}
if(!scrivi_fat(tab, cluster_penultimo, EOC_32))
return FALSE;
if(!scrivi_fat(tab, cluster_ultimo, FREE_32)) {
if(!scrivi_fat(tab, cluster_penultimo, backup))
set_errno(1,"Errore irrecuperabile, possibile perdita di dati");
sem_signal(tab->sem_fat);
return FALSE;
}
sem_signal(tab->sem_fat);
return TRUE;
}
void main(int argc, char * argv[])
{
//Local Variables
int num = 0, i, j;
sem_t sem_sulphate, sem_sulphur, sem_oxygen, proc_sem;
if(argc != 6)
{
Printf("Usage: "); Printf(argv[0]);
Exit();
}
num = dstrtol(argv[1], NULL, 10);
sem_sulphate = dstrtol(argv[2], NULL, 10);
sem_sulphur = dstrtol(argv[3], NULL, 10);
sem_oxygen = dstrtol(argv[4], NULL, 10);
proc_sem = dstrtol(argv[5], NULL, 10);
for(i = 0; i < num; i++)
{
if (sem_wait(sem_sulphate) != SYNC_SUCCESS) {
Printf("Bad semaphore of sulphate sem wait (%d) in reaction 2", sem_sulphate); Printf(argv[0]); Printf("\n");
Exit();
}
for(j = 0; j < SO2_NUM; j++)
{
if((sem_signal(sem_sulphur))!= SYNC_SUCCESS) {
Printf("Bad semaphore for SO2 increment in reaction 2 : (%d) ", getpid()); Printf(argv[0]); Printf(", exiting...\n");
Exit();
}
Printf("Created new sulphur dioxide (S02) molecule\n");
}
for(j = 0; j < O_NUM; j++)
{
if(sem_signal(sem_oxygen) != SYNC_SUCCESS) {
Printf("Bad semaphore for O increment in reaction 2 : (%d) ", getpid()); Printf(argv[0]); Printf(", exiting...\n");
Exit();
}
Printf("Created new oxygen (O2) molecule\n");
}
}
if(sem_signal(proc_sem) != SYNC_SUCCESS) {
Printf("Bad semaphore for proc sem increment in reaction : %d ", getpid()); Printf(argv[0]); Printf(", exiting...\n");
Exit();
}
}
void main(int argc, char * argv[])
{
//Local Variables
int num = 0, i, j;
sem_t sem_sulphur, sem_oxygen, sem_hydrogen, sem_acid, proc_sem;
if(argc != 7)
{
Printf("Usage: "); Printf(argv[0]);
Exit();
}
num = dstrtol(argv[1], NULL, 10);
sem_hydrogen = dstrtol(argv[2], NULL, 10);
sem_oxygen = dstrtol(argv[3], NULL, 10);
sem_sulphur = dstrtol(argv[4], NULL, 10);
sem_acid = dstrtol(argv[5], NULL, 10);
proc_sem = dstrtol(argv[6], NULL, 10);
for(i = 0; i < num; i++)
{
if (sem_wait(sem_hydrogen) != SYNC_SUCCESS) {
Printf("Bad semaphore of hydrogen sem wait (%d) in reaction 3", sem_hydrogen); Printf(argv[0]); Printf("\n");
Exit();
}
if (sem_wait(sem_oxygen) != SYNC_SUCCESS) {
Printf("Bad semaphore of oxygen sem wait (%d) in reaction 3", sem_oxygen); Printf(argv[0]); Printf("\n");
Exit();
}
if (sem_wait(sem_sulphur) != SYNC_SUCCESS) {
Printf("Bad semaphore of sulphate sem wait (%d) in reaction 3", sem_sulphur); Printf(argv[0]); Printf("\n");
Exit();
}
if(sem_signal(sem_acid) != SYNC_SUCCESS) {
Printf("Bad semaphore for SO2 increment in reaction 3 : (%d) ", getpid()); Printf(argv[0]); Printf(", exiting...\n");
Exit();
}
Printf("Created new sulphuric acid (H2S04) molecule\n");
}
if(sem_signal(proc_sem) != SYNC_SUCCESS) {
Printf("Bad semaphore for proc sem increment in reaction 3 : %d ", getpid()); Printf(argv[0]); Printf(", exiting...\n");
Exit();
}
}
int el_loader_init(void)
{
PRINTF("entrylist_load_init...\n");
spinlock_init(&loader_mutex);
memset(&loader, 0, sizeof(loader));
loader_status = LOADER_INIT;
loader_thd = 0;
PRINTF("entrylist_load_init : create semaphore.\n");
loader_sem = sem_create(1);
PRINTF("entrylist_load_init : semaphore [%p].\n",loader_sem);
if (!loader_sem) {
printf("entrylist_load_init : can not create semaphore.\n");
return -1;
}
PRINTF("entrylist_load_init : first wait semaphore.\n");
sem_wait(loader_sem);
PRINTF("entrylist_load_init : create thread.\n");
loader_thd = thd_create(THD_DEFAULTS, loader_thread, loader_sem);
if (!loader_thd) {
printf("entrylist_load_init : thread failed.\n");
sem_signal(loader_sem);
sem_destroy(loader_sem);
loader_sem = 0;
printf("entrylist_load_init : can not create loader thread.\n");
return -1;
}
PRINTF("entrylist_load_init : thread created, rename it.\n");
thd_set_label((kthread_t *)loader_thd, "Loader-thd");
PRINTF("entrylist_load_init : complete (thd=%p).\n", loader_thd);
return 0;
}
void main (int argc, char *argv[])
{
sem_t s_procs_completed; // Semaphore to signal the original process that we're done
int N = 10000;
int f_N;
if (argc != 2) {
Printf("Usage: %s <handle_to_procs_completed_semaphore>\n");
Exit();
}
// Convert the command-line strings into integers for use as handles
s_procs_completed = dstrtol(argv[1], NULL, 10);
f_N = f(N);
Printf("f %d = %d\n", N, f_N);
// Signal the semaphore to tell the original process that we're done
if(sem_signal(s_procs_completed) != SYNC_SUCCESS) {
Printf("hello_world (%d): Bad semaphore s_procs_completed (%d)!\n", getpid(), s_procs_completed);
Exit();
}
Printf("q2.3 cause the call stack to grow larger than 1 page (%d): Done!\n", getpid());
}
void main(int argc, char*argv[])
{
int handle;
atoms *atom;
sem_t semaphore;
handle = dstrtol(argv[1], NULL, 10);
semaphore = dstrtol(argv[2], NULL, 10);
atom = (atoms *)shmat(handle);
//sem_wait(semaphore);
while (1)
{
sem_wait(semaphore);
if (atom->count == MAX)
exit();
lock_acquire(atom->lock);
atom->n_atoms++;
Printf("N atom created.\n");
atom->o_atoms++;
Printf("O atom created.\n");
atom->count++;
lock_release(atom->lock);
sem_signal(semaphore);
}
//sem_signal(semaphore);
}
void main (int argc, char *argv[])
{
missile_code mc; // Used to access missile codes from mailbox
mbox_t mbox_N; // Handle to the mbox_N
mbox_t mbox_O2;
mbox_t mbox_NO2;
sem_t s_procs_completed; // Semaphore to signal the original process that we're done
if (argc != 5) {
Printf("Usage: %s <handle_to_mbox_N><handle_to_mbox_O2><handle_to_mbox_NO2> <handle_to_page_mapped_semaphore>\n");
Exit();
}
// Convert the command-line strings into integers for use as handles
mbox_N = dstrtol(argv[1], NULL, 10); // The "10" means base 10
mbox_O2 = dstrtol(argv[2],NULL,10);
mbox_NO2 = dstrtol(argv[3],NULL,10);
s_procs_completed = dstrtol(argv[4], NULL, 10);
// Open the mailbox
if (mbox_open(mbox_N) == MBOX_FAIL) {
Printf("Could not open the mbox_N!\n");
Exit();
}
if (mbox_open(mbox_O2) == MBOX_FAIL) {
Printf("Could not open the mbox_N!\n");
Exit();
}
if (mbox_open(mbox_NO2) == MBOX_FAIL) {
Printf("Could not open the mbox_N!\n");
Exit();
}
// Wait for a message from the mailbox
if (mbox_recv(mbox_N, sizeof(mc), (void *)&mc) == MBOX_FAIL) {
Printf("Could not receive message from mbox_N!\n");
Exit();
}
if (mbox_recv(mbox_O2, sizeof(mc), (void *)&mc) == MBOX_FAIL) {
Printf("Could not receive message from mbox_O2!\n");
Exit();
}
if (mbox_send(mbox_NO2, sizeof(missile_code), (void *)&mc) == MBOX_FAIL) {
Printf("Could not send message to mbox_NO2!\n");
Exit();
}
else Printf("Got 1 NO2!\n");
// Now print a message to show that everything worked
// Printf("spawn_me (%d): Received missile code: %c\n", getpid(), mc.really_important_char);
// Signal the semaphore to tell the original process that we're done
if(sem_signal(s_procs_completed) != SYNC_SUCCESS) {
Printf("spawn_me (%d): Bad semaphore s_procs_completed (%d)!\n", getpid(), s_procs_completed);
Exit();
}
// Printf("spawn_me (%d): Done!\n", getpid());
}
/* Shutdown the player */
void sndmp3_shutdown() {
sndmp3_status = STATUS_QUIT;
sem_signal(sndmp3_halt_sem);
while (sndmp3_status != STATUS_ZOMBIE)
thd_pass();
spu_disable();
}
/* Start playback (implies song load) */
int sndmp3_start(const char *fn, int loop) {
/* Can't start again if already playing */
if (sndmp3_status == STATUS_PLAYING)
return -1;
/* Initialize MP3 engine */
if (fn) {
if (libmpg123_init(fn) < 0)
return -1;
/* Set looping status */
sndmp3_loop = loop;
}
/* Wait for player thread to be ready */
while (sndmp3_status != STATUS_READY)
thd_pass();
/* Tell it to start */
if (fn)
sndmp3_status = STATUS_STARTING;
else
sndmp3_status = STATUS_REINIT;
sem_signal(sndmp3_halt_sem);
return 0;
}
void smoker_tobacco(){
int semid, shmid;
key_t key;
struct table *Table;
if ( (key = ftok("/dev/null", 65)) == (key_t) -1 ) {
perror("ftok");
exit(-1);
}
if ( (semid = semget(key, 8, 0666)) < 0 ) {
perror("semget");
exit(-1);
}
if ( (shmid = shmget(key, sizeof(struct table), 0666)) < 0 ) {
perror("shmid");
exit(-1);
}
Table = shmat(shmid, NULL, 0);
while(1) {
sem_wait(semid,TOBACCO_SEM,1);
printf("Smoker with TOBACCO making cigarrette\n");
sleep(3);
sem_signal(semid,AGENT,1);
}
shmdt(Table);
exit(0);
}
void main (int argc, char *argv[])
{
sem_t s_procs_completed; // Semaphore to signal the original process that we're done
int* memory_location; // Somewhere in the middle of 1024KB memory space
if (argc != 2) {
Printf("Usage: %s <handle_to_procs_completed_semaphore>\n");
Exit();
}
// Convert the command-line strings into integers for use as handles
s_procs_completed = dstrtol(argv[1], NULL, 10);
// Print test name
Printf("Test Out of Bounds Virtual Access (%d): Start\n", getpid());
// Bad practice but signal the original process first
// Do this because this process is going to die and we don't
// want the original process to hand
if(sem_signal(s_procs_completed) != SYNC_SUCCESS) {
Printf("Out of Bounds Virtual Access (%d): Bad semaphore s_procs_completed (%d)!\n", getpid(), s_procs_completed);
Exit();
}
// Access address in middle of virtual memory
// Virtual memory is 1024KB so accessing memory
// location 0x8000000 is somewhere outside of
// the virtual memory and should seg fault
memory_location = 0x8000000;
Printf("Accessing Memory Location: %d (decimal)\n", memory_location);
*memory_location = 0xDEADBEEF;
Printf("Test Out of Bounds Virtual Access (%d): Done!\n", getpid());
}
void main (int argc, char *argv[])
{
sem_t s_procs_completed; // Semaphore to signal the original process that we're done
int program_index;
int i=0,j=0; // Loop index variables
if (argc != 3) {
Printf("Usage: %s <program index> <handle_to_page_mapped_semaphore> (argc was %d)\n", argc);
Exit();
}
// Convert the command-line strings into integers for use as handles
program_index = dstrtol(argv[1], NULL, 10);
s_procs_completed = dstrtol(argv[2], NULL, 10);
// Now print messages to see if priority scheduling is working
for(i=0; i<30; i++) {
Printf("spawn_me (%d): %c%d\n", getpid(), 'A'+program_index, i);
for(j=0; j<50000; j++); // just busy-wait awhile
}
// Signal the semaphore to tell the original process that we're done
if(sem_signal(s_procs_completed) != SYNC_SUCCESS) {
Printf("spawn_me (%d): Bad semaphore s_procs_completed (%d)!\n", getpid(), s_procs_completed);
Exit();
}
Printf("spawn_me (%d): Done!\n", getpid());
}
int QuePut( QUEUE *pQueue, void *pMsg) {
if( pQueue->qMax != QUE_NO_LIMIT) { /* bounded queue */
#ifdef _WIN32
WaitForSingleObject( pQueue->qNotFull, INFINITE);
#elif defined(_arch_dreamcast)
sem_wait(pQueue->qNotFull);
#endif
}
OsLockMutex( ( void *) pQueue->qMutex, INFINITE);
InsertMsgAtQueueTail( pQueue, pMsg);
OsUnlockMutex( ( void *) pQueue->qMutex);
#ifdef _WIN32
ReleaseSemaphore( pQueue->qNotEmpty, 1, NULL);
#elif defined(_arch_dreamcast)
sem_signal(pQueue->qNotEmpty);
#else
{
char b;
write( pQueue->qNotEmpty[QUEUE_PIPE_OUT], &b, 1);
}
#endif
return( 0);
}
void press_button(int value_code)
{
struct input_event event;
int fd;
fd=open("/dev/input/event0",O_RDWR);
if (fd < 0)
{
perror("Can't open device...\n");
sem_signal(g_sem_id);
exit(1);
}
event.type = EV_KEY;
event.code = value_code;
event.value = 1;
gettimeofday(&event.time,0);
if(write(fd,&event,sizeof(event))==-1)
printf("write failed \n");
fflush(0);
event.type = EV_KEY;
event.code = value_code;
event.value = 0;
gettimeofday(&event.time,0);
if(write(fd,&event,sizeof(event))==-1)
printf("write failed \n");
fflush(0);
close(fd);
}
int _QueGet( QUEUE *pQueue, void **ppMsg) {
QMSG *pQMsg;
OsLockMutex( ( void *) pQueue->qMutex, INFINITE);
pQMsg = RemoveMsgFromQueueHead( pQueue);
OsUnlockMutex( ( void *) pQueue->qMutex);
if( pQueue->qMax != QUE_NO_LIMIT) {
#ifdef _WIN32
ReleaseSemaphore( pQueue->qNotFull, 1, NULL);
#elif defined(_arch_dreamcast)
sem_signal(pQueue->qNotFull);
#endif
}
#if !defined(_WIN32) && !defined(_arch_dreamcast)
{
char b;
read( pQueue->qNotEmpty[QUEUE_PIPE_IN], &b, 1);
}
#endif
*ppMsg = pQMsg->pMsg;
free( pQMsg);
return( 0);
}