T-Kernel Specification (1.B0.02)

102 CHAPTER 4. T-KERNEL/OS FUNCTIONS
The message header is T MSG (if TA MFIFO attribute is designated) or T MSG PRI (if TA MPRI). In either
case the message header has a fixed size, which can be obtained by sizeof (T MSG) or sizeof(T MSG PRI).
The actual message must be put in the area after the header. There is no limit on message size, which
may be variable-length.
[Additional Notes]
Messages are sent by tk snd mbx regardless of the status of the receiving tasks. In other words, message
sending is asynchronous. What waits in the queue is not the task itself, but the sent message. So while
there are queues of waiting messages and receiving tasks, the sending task does not go to WAIT state.
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T-Kernel 1.B0.02