T-Kernel Specification (1.B0.02)

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264 CHAPTER 6. T-KERNEL/DS FUNCTIONS The stack area extends from the stack pointer initial value toward the low addresses for the number of bytes designated as the stack size. istack − stksz ≤ user stack area < istack isstack − sstksz ≤ system stack area < isstack Note that the stack pointer initial value (istack, isstack) is not the same as its current position. The stack area may be used even before a task is started. Calling td get reg gets the stack pointer current position. Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
6.1. KERNEL INTERNAL STATE ACQUISITION FUNCTIONS 265 td ref sem, td ref flg, td ref mbx, td ref mtx td ref mbf, td ref por, td ref mpf, td ref mpl td ref cyc, td ref alm, td ref ssy Reference Queue [C Language Interface] ER ercd = td_ref_sem ( ID semid, TD_RSEM *rsem ); /* semaphore */ ER ercd = td_ref_flg ( ID flgid, TD_RFLG *rflg ); /* event flag */ ER ercd = td_ref_mbx ( ID mbxid, TD_RMBX *rmbx ); /* mailbox */ ER ercd = td_ref_mtx ( ID mtxid, TD_RMTX *rmtx ); /* mutex */ ER ercd = td_ref_mbf ( ID mbfid, TD_RMBF *rmbf ); /* message buffer */ ER ercd = td_ref_por ( ID porid, TD_RPOR *rpor ); /* rendezvous port */ ER ercd = td_ref_mpf ( ID mpfid, TD_RMPF *rmpf ); /* fixed-size memory pool */ ER ercd = td_ref_mpl ( ID mplid, TD_RMPL *rmpl ); /* variable-size memory pool */ ER ercd = td_ref_cyc ( ID cycid, TD_RCYC *rcyc ); /* cyclic handler */ ER ercd = td_ref_alm ( ID almid, TD_RALM *ralm ); /* alarm handler */ ER ercd = td_ref_ssy ( ID ssid, TD_RSSY *rssy ); /* subsystem */ [Parameters] ID —id Object ID TD R— r— Address of status information packet [Return Parameters] ER ercd Error code [Error Codes] E OK E ID E NOEXS Normal completion Bad identifier Object does not exist [Description] Gets the status of an object. This is similar to tk ref —. The return packets are defined as follows. /* *Semaphore status information td_ref_sem */ typedef struct td_rsem { VP exinf; /* extended information */ ID wtsk; /* waiting task ID */ INT semcnt; /* current semaphore count */ } TD_RSEM; 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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4.1. TASK MANAGEMENT FUNCTIONS 29 #
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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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4.6. MEMORY POOL MANAGEMENT FUNCTIO
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4.7. TIME MANAGEMENT FUNCTIONS 163
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4.8. INTERRUPT MANAGEMENT FUNCTIONS
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4.9. SYSTEM MANAGEMENT FUNCTIONS 19
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4.10. SUBSYSTEM MANAGEMENT FUNCTION
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Page 247 and 248: 5.2. ADDRESS SPACE MANAGEMENT FUNCT
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Page 277 and 278: 5.7. SYSTEM CONFIGURATION INFORMATI
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T-Kernel Specification (1.B0.02)

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