T-Kernel Specification (1.B0.02)

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100 CHAPTER 4. T-KERNEL/OS FUNCTIONS tk del mbx Delete Mailbox [C Language Interface] ER ercd = tk_del_mbx ( ID mbxid ) ; [Parameters] ID mbxid Mailbox ID [Return Parameters] ER ercd Error code [Error Codes] E OK E ID E NOEXS Normal completion Invalid ID number (mbxid is invalid or cannot be used) Object does not exist (the mailbox designated in mbxid does not exist) [Description] Deletes the mailbox designated in mbxid. Issuing this system call releases the mailbox ID and control block memory space, etc., associated with the mailbox. This system call completes normally even if there are tasks waiting for messages in the deleted mailbox, but error code E DLT is returned to each of the tasks in WAIT state. Even if there are messages still in the deleted mailbox, the mailbox is deleted without returning an error code. Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
4.4. SYNCHRONIZATION AND COMMUNICATION FUNCTIONS 101 tk snd mbx Send Message to Mailbox [C Language Interface] ER ercd = tk_snd_mbx ( ID mbxid, T_MSG *pk_msg ) ; [Parameters] ID mbxid Mailbox ID T MSG* pk msg Message packet address [Return Parameters] ER ercd Error code [Error Codes] E OK E ID E NOEXS E PAR Normal completion Invalid ID number (mbxid is invalid or cannot be used) Object does not exist (the mailbox designated in mbxid does not exist) Parameter error (pk msg is a value that cannot be used) [Description] Sends the message packet having pk msg as its start address to the mailbox designated in mbxid. The message packet contents are not copied; only the start address (pk msg) is passed at the time of message receipt. If tasks are already waiting for messages in the same mailbox, the WAIT state of the task at the head of the queue is released, and the pk msg passed to tk snd mbx is sent to that task, becoming a parameter returned by tk rcv mbx. If there are no tasks waiting for messages in the designated mailbox, the sent message goes in the message queue of that mailbox. In neither case does the task issuing tk snd mbx enter WAIT state. pk msg is the start address of the packet containing the message, including header. The message header has the following format. typedef struct t_msg { ? ? /* Implementation-dependent contents (fixed size) */ } T_MSG; typedef struct t_msg_pri { T_MSG msgque; /* message queue area */ PRI msgpri; /* message priority */ } T_MSG_PRI; 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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4.6. 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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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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