matos/core/thread.h

#pragma once

struct thread;
#include "cpu_context.h"
#include "mem.h"
#include "process.h"

#define THREAD_NAME_MAX_LENGTH 32
#define THREAD_DEFAULT_STACK_SIZE PAGE_SIZE


typedef enum {
    RUNNING,
    READY,
    SLEEPING,
    WAITING,
    EXITING
} thread_state;

struct thread {
    char name[THREAD_NAME_MAX_LENGTH];
    struct cpu_state *cpuState;
    thread_state state;
    vaddr_t stackAddr;
    size_t stackSize;

    unsigned long jiffiesSleeping;
    int sleepHaveTimeouted;

    struct thread *next, *prev;
    struct thread *timeNext, *timePrev;
    // For User thread only
    struct thread *nextInProcess, *prevInProcess;
    struct process *process;
};

int threadSetup(vaddr_t mainStack, size_t mainStackSize);
void threadExit();

struct thread *threadCreate(const char *name, cpu_kstate_function_arg1_t func, void *args);
void threadDelete(struct thread *thread);

struct thread *threadSelectNext();
struct cpu_state *threadSwitch(struct cpu_state *prevCpu);

int threadYield();
int threadWait(struct thread *current, struct thread *next, unsigned long msec);
int threadUnsched(struct thread *th);
int threadMsleep(unsigned long msec);
int threadOnJieffiesTick();
struct thread *getCurrentThread();
int threadAddThread(struct thread *th);