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#ifndef DEF_THREAD_CLASS_H
#define DEF_THREAD_CLASS_H
#include <TaskManager/Process.class.h>
#include <SyscallManager/IDT.ns.h>
#define T_ZOMBIE 0
#define T_RUNNING 1
#define T_SLEEPING 2
#define T_IRQWAIT 3 //This can only happen if process->uid == 0 (root)
class Thread {
friend class Process; //This might be useful
private:
Thread(); //Creates a thread without initializing anything. Used by Process::createKernel();
Process *m_process; //Associated process
u32int m_esp, m_ebp, m_eip;
u8int m_state; //Is one of T_* defined above
union { //What the thread might be waiting for
u32int m_time;
u8int m_irq; //An IRQ number
} waitfor;
bool m_isKernel; //Says if stack is in kernel pagedir, and if thread should run in ring 0
u32int m_kernelStackFrame; //Used for allocating and freeing a frame used as a stack
void setup(u32int (*entry_point)(), u32int esp); //Sets up stack, called by both constructors
public:
Thread(u32int (*entry_point)(), bool iskernel = false); //Assumes process is current process, or is kprocess if isk
Thread(Process* process, u32int (*entry_point)());
~Thread();
void finish(u32int errcode); //Called by run() when thread returns, and by exception handler. Can also be called by the thread itself
void handleException(registers_t regs, int no);
void setState(u32int esp, u32int ebp, u32int eip);
u32int getEsp();
u32int getEbp();
u32int getEip();
Process* getProcess();
void sleep(u32int msecs);
void waitIRQ(u8int irq);
bool runnable(); //Called by scheduler
inline bool irqHappens(u8int irq) { //Inline for speed
if (m_state == T_IRQWAIT and waitfor.m_irq == irq) {
m_state = T_RUNNING;
return true;
}
return false;
}
};
#endif
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