T-Kernel Specification (1.B0.02)

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254 CHAPTER 5. T-KERNEL/SM • INT tk_get_cfs( UB *name, UB *buf, INT max ) name buf max return code Name Array storing character string Maximum size of buf (in bytes) Size of defined character string information (in bytes) or error Gets character string information from system configuration information. This function gets up to max characters of character string information defined by the name designated in the name parameter and stores the acquired information in buf. If the acquired character string is shorter than max characters, it is terminated by ‘\0’ when stored. The length of the defined character string information (not including ‘\0’) is passed in the return code. If return code > max, this indicates that not all the information could be stored. By designating max = 0, the character string length can be found out without actually storing anything in buf. E NOEXS is returned if no information is defined with the name designated in the name parameter. The behavior if the information defined as name is a numeric string is indeterminate. This function can be invoked from any protection level, without being limited by the protection level from which T-Kernel/OS system call can be invoked. 5.7.2 Standard System Configuration Information The following information is defined as standard system configuration information. A standard information name is prefixed by T. N: Numeric string information S: Character string information • Product information S: TSysName System name (product name) • Maximum object counts N: TMaxTskId Maximum tasks N: TMaxSemId Maximum semaphores N: TMaxFlgId Maximum event flags N: TMaxMbxId Maximum mailboxes N: TMaxMtxId Maximum mutexes N: TMaxMbfId Maximum message buffers N: TMaxPorId Maximum rendezvous ports N: TMaxMpfId Maximum fixed-size memory pools N: TMaxMplId Maximum variable-size memory pools N: TMaxCycId Maximum cyclic handlers N: TMaxAlmId Maximum alarm handlers N: TMaxResId Maximum resource groups N: TMaxSsyId Maximum subsystems N: TMaxSsyPri Maximum subsystem priorities • Other Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
5.7. SYSTEM CONFIGURATION INFORMATION MANAGEMENT FUNCTIONS 255 N: TSysStkSz Default system stack size (in bytes) N: TSVCLimit Lowest protection level for system call invoking N: TTimPeriod Timer interrupt interval (ms) • Device management N: TMaxRegDev Maximum device registrations N: TMaxOpnDev Maximum device open count N: TMaxReqDev Maximum device requests N: TDEvtMbfSz Event notification message buffer size (in bytes) Maximum event notification message length (in bytes) If TDEvtMbfSz is not defined or if the message buffer size is a negative value, an event notification message buffer is not used. When multiple values are defined for any of the above numeric strings, they are stored in the same order as in the explanation. Examples: tk_get_cfn("TDEvtMbfSz", val, 2) val[0] = Event notification message buffer size val[1] = Maximum event notification message length 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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4.7. 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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Page 247 and 248: 5.2. ADDRESS SPACE MANAGEMENT FUNCT
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T-Kernel Specification (1.B0.02)

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