Boolean ABuffer::IsEmpty()
{
HEnterSection(lock);
Boolean ans = (pktList.size()==0)?TRUE:FALSE;
HLeaveSection(lock);
return ans;
}
int ABuffer::NumPackets()
{
HEnterSection(lock);
int np = pktList.size();
HLeaveSection(lock);
return np;
}
Boolean ABuffer::IsFull()
{
HEnterSection(lock);
if (bsize==0) return FALSE;
Boolean ans = (int(pktList.size())>=bsize)?TRUE:FALSE;
HLeaveSection(lock);
return ans;
}
// open this gram for editing
void AGram::OpenEdit()
{
HEnterSection(lock);
if (isOpen){
HRError(10761,"Attempting to open an already open grammar %s",rname.c_str());
throw ATK_Error(10761);
}
isOpen = TRUE;
}
// Copy packet from the front of the pktList. Wait for nonEmpty
// if the buffer is empty. Leave the packet where it is.
APacket ABuffer::PeekPacket()
{
HEnterSection(lock);
while (pktList.size()==0) {
HWaitSignal(notEmpty, lock);
}
APacket p = pktList.front();
HLeaveSection(lock);
return p;
}
TASKTYPE TASKMOD test3(void * hp)
{
HEnterSection(t3_lock);
printf("Test 3 - waiting for Signal\n"); fflush(stdout);
HWaitSignal(t3_signal,t3_lock);
printf("Test 3 - Signal Received\n"); fflush(stdout);
HLeaveSection(t3_lock);
HExitThread(0);
return 0;
}
// Peek at kind of first item in buffer
PacketKind ABuffer::GetFirstKind()
{
PacketKind pk = AnyPacket;
HEnterSection(lock);
if (pktList.size()>0){
APacket p = pktList.front();
pk = p.GetKind();
}
HLeaveSection(lock);
return pk;
}
void ABuffer::PopPacket()
{
HEnterSection(lock);
while (pktList.size()==0) {
HWaitSignal(notEmpty, lock);
}
pktList.pop_front();
HLeaveSection(lock);
HSendSignal(notFull);
SendBufferEvents();
}
// Get packet p from the front of the pktList. Wait for nonEmpty
// if the buffer is empty.
APacket ABuffer::GetPacket()
{
HEnterSection(lock);
while (pktList.size()==0) {
HWaitSignal(notEmpty, lock);
}
APacket p = pktList.front();
pktList.pop_front();
HLeaveSection(lock);
HSendSignal(notFull);
return p;
}
// Push packet p onto the end of the pktList. Wait for nonFull
// if the buffer is full
void ABuffer::PutPacket(APacket p)
{
assert(filter == AnyPacket || p.GetKind() == filter);
HEnterSection(lock);
while (bsize!=0 && int(pktList.size())>= bsize) {
HWaitSignal(notFull, lock);
}
pktList.push_back(p);
HLeaveSection(lock);
HSendSignal(notEmpty);
SendBufferEvents();
}
void bput(char c)
{
HPauseThread(pdel);
printf("<%c",c); fflush(stdout);
HEnterSection(lock);
while (used>=bsize) {
printf("!");
HWaitSignal(notfull,lock);
}
buf[inx] = c; inx++; used++;
if (inx == bsize) inx = 0;
HSendSignal(notempty);
HLeaveSection(lock);
printf(">"); fflush(stdout);
}
char bget()
{
int c;
HPauseThread(cdel); printf("{"); fflush(stdout);
HEnterSection(lock);
while (used==0) {
printf("?");
HWaitSignal(notempty,lock);
}
c = buf[outx]; outx++; --used;
if (outx == bsize) outx = 0;
HSendSignal(notfull);
HLeaveSection(lock);
printf("%c}",c); fflush(stdout);
return c;
}
// Push packet p onto the end of the pktList. Wait for nonFull
// if the buffer is full
void ABuffer::PutPacket(APacket p)
{
assert(filter == AnyPacket || p.GetKind() == filter);
for (ABufferListenerList::iterator l = listenerList.begin(); l != listenerList.end(); l++) {
ABufferListener *listener = *l;
listener->ABufferReceivedPacket(*this, p);
}
HEnterSection(lock);
while (bsize!=0 && int(pktList.size())>= bsize) {
HWaitSignal(notFull, lock);
}
pktList.push_back(p);
HLeaveSection(lock);
HSendSignal(notEmpty);
SendBufferEvents();
}
TASKTYPE TASKMOD test2(void * hp)
{
int i; float x;
HPriority p;
FILE *f;
p = (HPriority)hp;
if (t2_lockon) HEnterSection(t2_lock);
x = t2_sum; /* Load shared variable */
f = fopen("Readme.txt","r"); /* waste a bit of time on i/o */
if (f==NULL)
printf("Cant open ../HThreadTest.c\n");
else {
while ((i=fgetc(f)) != '\n') putchar(i);
printf("\n"); fflush(stdout);
fclose(f);
}
x = x + t2_inc;
t2_sum = x; /* update shared variable */
if (t2_lockon) HLeaveSection(t2_lock);
HExitThread(0);
return 0;
}
