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#include "dolphin/DVDPriv.h"
#define MAX_QUEUES 4
typedef struct {
DVDCommandBlock* next;
DVDCommandBlock* prev;
} DVDQueue;
static DVDQueue WaitingQueue[MAX_QUEUES];
void __DVDClearWaitingQueue(void) {
u32 i;
for (i = 0; i < MAX_QUEUES; i++) {
DVDCommandBlock* q;
q = (DVDCommandBlock*)&(WaitingQueue[i]);
q->next = q;
q->prev = q;
}
}
BOOL __DVDPushWaitingQueue(s32 prio, DVDCommandBlock* block) {
BOOL enabled;
DVDCommandBlock* q;
enabled = OSDisableInterrupts();
q = (DVDCommandBlock*)&(WaitingQueue[prio]);
q->prev->next = block;
block->prev = q->prev;
block->next = q;
q->prev = block;
OSRestoreInterrupts(enabled);
return TRUE;
}
static DVDCommandBlock* PopWaitingQueuePrio(s32 prio) {
DVDCommandBlock* tmp;
BOOL enabled;
DVDCommandBlock* q;
enabled = OSDisableInterrupts();
q = (DVDCommandBlock*)&(WaitingQueue[prio]);
tmp = q->next;
q->next = tmp->next;
tmp->next->prev = q;
OSRestoreInterrupts(enabled);
tmp->next = (DVDCommandBlock*)NULL;
tmp->prev = (DVDCommandBlock*)NULL;
return tmp;
}
DVDCommandBlock* __DVDPopWaitingQueue(void) {
u32 i;
BOOL enabled;
DVDCommandBlock* q;
enabled = OSDisableInterrupts();
for (i = 0; i < MAX_QUEUES; i++) {
q = (DVDCommandBlock*)&(WaitingQueue[i]);
if (q->next != q) {
OSRestoreInterrupts(enabled);
return PopWaitingQueuePrio((s32)i);
}
}
OSRestoreInterrupts(enabled);
return (DVDCommandBlock*)NULL;
}
BOOL __DVDCheckWaitingQueue(void) {
u32 i;
BOOL enabled;
DVDCommandBlock* q;
enabled = OSDisableInterrupts();
for (i = 0; i < MAX_QUEUES; i++) {
q = (DVDCommandBlock*)&(WaitingQueue[i]);
if (q->next != q) {
OSRestoreInterrupts(enabled);
return TRUE;
}
}
OSRestoreInterrupts(enabled);
return FALSE;
}
BOOL __DVDDequeueWaitingQueue(DVDCommandBlock* block) {
BOOL enabled;
DVDCommandBlock* prev;
DVDCommandBlock* next;
enabled = OSDisableInterrupts();
prev = block->prev;
next = block->next;
if ((prev == (DVDCommandBlock*)NULL) || (next == (DVDCommandBlock*)NULL)) {
OSRestoreInterrupts(enabled);
return FALSE;
}
prev->next = next;
next->prev = prev;
OSRestoreInterrupts(enabled);
return TRUE;
}
BOOL __DVDIsBlockInWaitingQueue(DVDCommandBlock* block) {
u32 i;
DVDCommandBlock* start;
DVDCommandBlock* q;
for (i = 0; i < MAX_QUEUES; i++) {
start = (DVDCommandBlock*)&(WaitingQueue[i]);
if (start->next != start) {
for (q = start->next; q != start; q = q->next) {
if (q == block)
return TRUE;
}
}
}
return FALSE;
}
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