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https://github.com/drasko/codezero.git
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4fb5277123
- Added mutex_trylock() - Implemented most of exchange_registers() - thread_control() now needs a lock for operations that can modify thread context. - thread_start() does not initialise scheduler flags, now done in thread_create. TODO: - Fork/clone'ed threads should retain their context in tcb, not syscall stack. - exchange_registers() calls in userspace need cleaning up.
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/*
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* Scheduler and runqueue API definitions.
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*
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* Copyright (C) 2007 Bahadir Balban
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*/
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#ifndef __SCHEDULER_H__
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#define __SCHEDULER_H__
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#include <l4/generic/tcb.h>
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#include INC_SUBARCH(mm.h)
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#include INC_GLUE(memory.h)
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/* Ticks per second, try ticks = 1000 + timeslice = 1 for regressed preemption test. */
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#define HZ 100
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#define TASK_TIMESLICE_DEFAULT 5000
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/* #define TASK_TIMESLICE_DEFAULT (HZ/100)*/
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static inline struct ktcb *current_task(void)
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{
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register u32 stack asm("sp");
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return (struct ktcb *)(stack & (~PAGE_MASK));
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}
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#define current current_task()
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#define need_resched (current->ts_need_resched)
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/* Flags set by kernel to direct the scheduler about future task state. */
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#define __SCHED_FL_SUSPEND 1
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#define SCHED_FL_SUSPEND (1 << __SCHED_FL_SUSPEND)
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#define __SCHED_FL_RESUME 2
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#define SCHED_FL_RESUME (1 << __SCHED_FL_RESUME)
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#define __SCHED_FL_SLEEP 3
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#define SCHED_FL_SLEEP (1 << __SCHED_FL_SLEEP)
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#define SCHED_FL_MASK (SCHED_FL_SLEEP | SCHED_FL_RESUME \
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| SCHED_FL_SUSPEND)
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void sched_runqueue_init(void);
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void sched_start_task(struct ktcb *task);
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void sched_resume_task(struct ktcb *task);
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void sched_suspend_task(struct ktcb *task);
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void sched_tell(struct ktcb *task, unsigned int flags);
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void scheduler_start(void);
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void sched_yield(void);
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void schedule(void);
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/* Asynchronous notifications to scheduler */
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void sched_notify_resume(struct ktcb *task);
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void sched_notify_sleep(struct ktcb *task);
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void sched_notify_suspend(struct ktcb *task);
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#endif /* __SCHEDULER_H__ */
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