school/ecen425/yakk.h

101 lines
2.1 KiB
C

#ifndef YAKK_H
#define YAKK_H
#include "yaku.h"
#define null 0
#define IDLETASKSTACKSIZE 512
//Error Codes
#define NEW_TASK_FAILED 1
#define READY_QUEUE_EMPTY 2
#define NEW_SEM_FAILED 3
#define NEW_QUEUE_FAILED 4
//Kernel Data Structures
enum TaskState {T_BLOCKED, T_READY, T_RUNNING};
enum KernelState {K_BLOCKED, K_RUNNING};
typedef struct TCB {
unsigned int tid;
unsigned char priority;
void* stackPointer;
enum TaskState state;
unsigned int delayCount;
struct TCB* next;
struct TCB* prev;
} TCB;
typedef struct TaskBlock {
TCB TCBPool[MAX_TASKS+1];
unsigned int nextFreeTCB;
} TaskBlock;
typedef struct PriorityQueue {
TCB* head;
TCB* tail;
unsigned int size;
} PriorityQueue;
typedef struct DelayQueue {
TCB* head;
unsigned int size;
} DelayQueue;
typedef struct Semaphore {
int value;
PriorityQueue queue;
} YKSEM;
typedef struct SemBlock {
YKSEM SemPool[MAX_SEMS];
unsigned int nextFreeSem;
} SemBlock;
typedef struct MessageQueue {
void** messages;
unsigned int currentSize;
unsigned int maxSize;
PriorityQueue queue;
} YKQ;
typedef struct MessageQueueBlock {
YKQ QueuePool[MAX_QUEUES];
unsigned int nextFreeQueue;
} MsgQueueBlock;
//Kernel API
void YKInitialize(void);
void YKEnterMutex(void);
void YKExitMutex(void);
void YKIdleTask(void);
void YKNewTask(void (* task) (void), void *taskStack, unsigned char priority);
void YKDelayTask(unsigned count);
void YKEnterISR(void);
void YKExitISR(void);
unsigned int YKGetISRCallDepth(void);
void YKScheduler(void);
void YKDispatcher(TCB* readyTask);
void YKTickHandler(void);
YKSEM* YKSemCreate(int initialValue);
void YKSemPend(YKSEM* semaphore);
void YKSemPost(YKSEM* semaphore);
YKQ* YKQCreate(void** start, unsigned size);
void* YKQPend(YKQ* queue);
int YKQPost(YKQ* queue, void* msg);
//YKEVENT* YKEventCreate(unsigned initialValue);
//void YKEventSet(YKEVENT* event, unsigned eventMask);
//void YKEVentReset(YKEVENT* event, unsigned eventMask);
TCB* getNewTCB(void);
YKSEM* getNewSem(void);
YKQ* getNewQueue(void);
void YKRun(void);
unsigned int getYKCtxSwCount();
unsigned int getYKIdelCount();
void setYKIdelCount(int value);
void setYKCtxSwCount(int value);
unsigned int getYKTickNum();
#endif