T-Kernel Specification (1.B0.02)

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8 CHAPTER 2. CONCEPTS UNDERLYING THE T-KERNEL SPECIFICATION Task transition to a wait state (including SUSPEND) Operations in invoking task (transitions from RUN state) tk slp tsk RUN ↓ WAIT tk ext tsk Operations on other tasks (transitions from other states) tk sus tsk READY WAIT ↓ ↓ SUSPEND WAIT-SUSPEND tk ter tsk Task exit RUN ↓ DORMANT tk exd tsk READY WAIT ↓ ↓ DORMANT tk del tsk Task deletion RUN ↓ NON-EXISTENT DORMANT ↓ NON-EXISTENT Table 2.1: State Transitions Distinguishing Invoking Task and Other Tasks Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
2.2. TASK STATES AND SCHEDULING RULES 9 READY state ✻ ✻ ✛ ✻ Release wait Dispatching Preemption ✲ Wait condition RUN state Suspend (tk sus tsk) ✲ WAIT state ❄ WAIT-SUSPENDED state ✻ Resume (tk rsm tsk, tk frsm tsk) ✛ Terminate (tk ter tsk) Terminate (tk ter tsk) Susepnd (tk sus tsk) ✲ Resume (tk rsm tsk, tk frsm tsk) ❄ SUSPEND state Release wait ✻ Terminate (tk ter tsk) Start (tk sta tsk) Terminate (tk ter tsk) ✲ Create (tk cre tsk) DORMANT state ✻ Delete (tk del tsk) ✛ Terminate ✛ Exit (tk ext tsk) ❄ NON-EXISTENT state ✛Exit and delete (tk exd tsk) Figure 2.1: Task State Transitions 2.2.2 Task Scheduling Rules The T-Kernel specification adopts a preemptive priority-based scheduling method based on priority levels assigned to each task. Tasks having the same priority are scheduled on a FCFS (First Come First Served) basis. Specifically, task precedence is used as the task scheduling rule, and precedence among Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
Page 1 and 2: T-Kernel Specification T-Kernel 1.B
Page 3 and 4: Contents 1 T-Kernel Overview 1 1.1
Page 5 and 6: CONTENTS v tk set flg (Set Event Fl
Page 7 and 8: CONTENTS vii 5.2.2 Address Space Ch
Page 9 and 10: CONTENTS ix td cal que (Reference Q
Page 11 and 12: List of Figures 1.1 Position of T-K
Page 13 and 14: List of Tables 2.1 State Transition
Page 15 and 16: System Call Notation In the parts o
Page 17 and 18: Index of T-Kernel/OS System Calls T
Page 19 and 20: INDEX OF T-KERNEL/OS SYSTEM CALLS x
Page 21 and 22: Index of T-Kernel/SM Extended SVC L
Page 23 and 24: Index of T-Kernel/DS System Calls T
Page 25 and 26: Chapter 1 T-Kernel Overview 1.1 Pos
Page 27 and 28: 1.2. SCALABILITY 3 • Middleware m
Page 29 and 30: Chapter 2 Concepts Underlying the T
Page 31: 2.2. TASK STATES AND SCHEDULING RUL
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4.2. TASK-DEPENDENT SYNCHRONIZATION
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4.3. TASK EXCEPTION HANDLING FUNCTI
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4.4. SYNCHRONIZATION AND COMMUNICAT
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4.7. TIME MANAGEMENT FUNCTIONS 163
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4.10. SUBSYSTEM MANAGEMENT FUNCTION
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Chapter 5 T-Kernel/SM Details of th
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5.1. SYSTEM MEMORY MANAGEMENT FUNCT
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5.2. ADDRESS SPACE MANAGEMENT FUNCT
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5.2. ADDRESS SPACE MANAGEMENT FUNCT
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5.3. DEVICE MANAGEMENT FUNCTIONS 22
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5.5. IO PORT ACCESS SUPPORT FUNCTIO
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5.7. SYSTEM CONFIGURATION INFORMATI
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5.7. SYSTEM CONFIGURATION INFORMATI
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5.8. SUBSYSTEM AND DEVICE DRIVER ST
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260 CHAPTER 6. T-KERNEL/DS FUNCTION
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284 CHAPTER 7. REFERENCE INT tevptn
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286 CHAPTER 7. REFERENCE ER ercd =
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288 CHAPTER 7. REFERENCE INT ct = t
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290 CHAPTER 7. REFERENCE E OACV ERC
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T-Kernel Specification (1.B0.02)

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