T-Kernel Specification (1.B0.02)

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144 CHAPTER 4. T-KERNEL/OS FUNCTIONS tk ref por Reference Port Status [C Language Interface] ER ercd = tk_ref_por ( ID porid, T_RPOR *pk_rpor ) ; [Parameters] ID porid Rendezvous port ID T RPOR* pk rpor Start address of packet for returning status information [Return Parameters] ER ercd Error code pk rpor detail: VP exinf Extended information ID wtsk Waiting task information ID atsk Accept task information INT maxcmsz Maximum call message size (in bytes) INT maxrmsz Maximum reply message size (in bytes) (Other implementation-dependent parameters may be added beyond this point.) [Error Codes] E OK E ID E NOEXS E PAR Normal completion Invalid ID number (porid is invalid or cannot be used) Object does not exist (the rendezvous port designated in porid does not exist) Parameter error (the return parameter packet address cannot be used) [Description] References the status of the rendezvous port designated in porid, passing in return parameters information about the accepting task (atsk), information about a task waiting on a rendezvous call (wtsk), maximum message sizes (maxcmsz, maxrmsz), and extended information (exinf). wtsk indicates the ID of a task in WAIT state on rendezvous call at the rendezvous port. If there is no task waiting on rendezvous call, wtsk = 0 is returned. atsk indicates the ID of a task in WAIT state on rendezvous acceptance at the rendezvous port. If there is no task waiting for rendezvous acceptance, atsk = 0 is returned. If there are multiple tasks waiting on rendezvous call or acceptance at this rendezvous port, the ID of the task at the head of the call queue and accept queue is returned. If the designated rendezvous port does not exist, error code E NOEXS is returned. Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
4.5. EXTENDED SYNCHRONIZATION AND COMMUNICATION FUNCTIONS 145 [Additional Notes] This system call cannot be used to get information about tasks involved in a currently established rendezvous. Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
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T-Kernel Specification T-Kernel 1.B
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Contents 1 T-Kernel Overview 1 1.1
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CONTENTS v tk set flg (Set Event Fl
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CONTENTS vii 5.2.2 Address Space Ch
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CONTENTS ix td cal que (Reference Q
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List of Figures 1.1 Position of T-K
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List of Tables 2.1 State Transition
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System Call Notation In the parts o
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Index of T-Kernel/OS System Calls T
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INDEX OF T-KERNEL/OS SYSTEM CALLS x
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Index of T-Kernel/SM Extended SVC L
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Index of T-Kernel/DS System Calls T
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Chapter 1 T-Kernel Overview 1.1 Pos
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1.2. SCALABILITY 3 • Middleware m
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Chapter 2 Concepts Underlying the T
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2.2. TASK STATES AND SCHEDULING RUL
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2.2. TASK STATES AND SCHEDULING RUL
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2.3. INTERRUPT HANDLING 11 preceden
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2.5. SYSTEM STATES 13 Transient sta
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2.7. MEMORY 15 which the upper and
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Chapter 3 Common T-Kernel Specifica
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3.2. SYSTEM CALLS 19 /* * Common co
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3.2. SYSTEM CALLS 21 Ordinarily a f
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3.3. HIGH-LEVEL LANGUAGE SUPPORT RO
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Chapter 4 T-Kernel/OS Functions Thi
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4.1. TASK MANAGEMENT FUNCTIONS 27 t
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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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4.9. SYSTEM MANAGEMENT FUNCTIONS 19
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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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5.4. INTERRUPT MANAGEMENT FUNCTIONS
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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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