Regards
Alessandro
ANSWER 1
As shown below calling taskName with a null argument will return the
same result returned by taskName called with the return value of
taskIdSelf().
OUTPUT:
Spawned task xeno_test taskId=0x01a59a48
This is task_entry_pnt() of task 0x01a59a48
taskName(0)=xeno_test taskName(taskIdSelf())=xeno_test
taskName(0x01a59a48)=xeno_test
ANSWER 2
MSG_PRI_NORMAL is defined 0 and MSG_PRI_URGENT is defined 1. It seems
that all non 0 priority
messages are managed as urgent. The first message extracted from the
queue by a receiver is
the last inserted into the queue with a non 0 priority.
The following 7 cases show the calling sequence of a sending task and
the received message
lengths of a receiving task.
CASE 1
[Sending task]: [msgQSend(qid,"a" , 1, NO_WAIT,
MSG_PRI_NORMAL)] returned OK
[Sending task]: [msgQSend(qid,"ab" , 2, NO_WAIT,
MSG_PRI_URGENT)] returned OK
[Sending task]: [msgQSend(qid,"abc" , 3, NO_WAIT, 2)] returned OK
[Sending task]: [msgQSend(qid,"abcd" , 4, NO_WAIT, 3)] returned OK
[Sending task]: [msgQSend(qid,"abcde" , 5, NO_WAIT, 4)] returned OK
[Sending task]: [msgQSend(qid,"abcdef" , 6, NO_WAIT, 5)] returned OK
[Sending task]: [msgQSend(qid,"abcdefg" , 7, NO_WAIT, 6)] returned OK
[Sending task]: [msgQSend(qid,"abcdefgh" , 8, NO_WAIT, 7)] returned OK
[Sending task]: [msgQSend(qid,"abcdefghi" , 9, NO_WAIT, 8)] returned OK
[Sending task]: [msgQSend(qid,"abcdefghij",10, NO_WAIT, 9)] returned OK
[Receiving task]: Received 10 bytes from queue
[Receiving task]: Received 9 bytes from queue
[Receiving task]: Received 8 bytes from queue
[Receiving task]: Received 7 bytes from queue
[Receiving task]: Received 6 bytes from queue
[Receiving task]: Received 5 bytes from queue
[Receiving task]: Received 4 bytes from queue
[Receiving task]: Received 3 bytes from queue
[Receiving task]: Received 2 bytes from queue
[Receiving task]: Received 1 bytes from queue
CASE 2
[Sending task]: [msgQSend(qid,"abcdefghij",10, NO_WAIT, 9)] returned OK
[Sending task]: [msgQSend(qid,"abcdefghi" , 9, NO_WAIT, 8)] returned OK
[Sending task]: [msgQSend(qid,"abcdefgh" , 8, NO_WAIT, 7)] returned OK
[Sending task]: [msgQSend(qid,"abcdefg" , 7, NO_WAIT, 6)] returned OK
[Sending task]: [msgQSend(qid,"abcdef" , 6, NO_WAIT, 5)] returned OK
[Sending task]: [msgQSend(qid,"abcde" , 5, NO_WAIT, 4)] returned OK
[Sending task]: [msgQSend(qid,"abcd" , 4, NO_WAIT, 3)] returned OK
[Sending task]: [msgQSend(qid,"abc" , 3, NO_WAIT, 2)] returned OK
[Sending task]: [msgQSend(qid,"ab" , 2, NO_WAIT,
MSG_PRI_URGENT)] returned OK
[Sending task]: [msgQSend(qid,"a" , 1, NO_WAIT,
MSG_PRI_NORMAL)] returned OK
[Receiving task]: Received 2 bytes from queue
[Receiving task]: Received 3 bytes from queue
[Receiving task]: Received 4 bytes from queue
[Receiving task]: Received 5 bytes from queue
[Receiving task]: Received 6 bytes from queue
[Receiving task]: Received 7 bytes from queue
[Receiving task]: Received 8 bytes from queue
[Receiving task]: Received 9 bytes from queue
[Receiving task]: Received 10 bytes from queue
[Receiving task]: Received 1 bytes from queue
CASE 3
[Sending task]: [msgQSend(qid,"abcdef" ,6, NO_WAIT, 5)] returned OK
[Sending task]: [msgQSend(qid,"abcdefgh" ,8, NO_WAIT, 7)] returned OK
[Receiving task]: Received 8 bytes from queue
[Receiving task]: Received 6 bytes from queue
CASE 4
[Sending task]: [msgQSend(qid,"abcdefgh" ,8, NO_WAIT, 7)] returned OK
[Sending task]: [msgQSend(qid,"abcdef" ,6, NO_WAIT, 5)] returned OK
[Receiving task]: Received 6 bytes from queue
[Receiving task]: Received 8 bytes from queue
CASE 5
[Sending task]: [msgQSend(qid,"abcdef" ,6, NO_WAIT, 5)] returned OK
[Sending task]: [msgQSend(qid,"a" ,1, NO_WAIT, MSG_PRI_NORMAL)]
returned OK
[Sending task]: [msgQSend(qid,"abcdefgh" ,8, NO_WAIT, 7)] returned OK
[Receiving task]: Received 8 bytes from queue
[Receiving task]: Received 6 bytes from queue
[Receiving task]: Received 1 bytes from queue
CASE 6
[Sending task]: [msgQSend(qid,"abcdef" ,6, NO_WAIT, 5)] returned OK
[Sending task]: [msgQSend(qid,"a" ,1, NO_WAIT, MSG_PRI_NORMAL)]
returned OK
[Sending task]: [msgQSend(qid,"ab" ,2, NO_WAIT,-1)] returned OK
[Receiving task]: Received 2 bytes from queue
[Receiving task]: Received 6 bytes from queue
[Receiving task]: Received 1 bytes from queue
CASE 7
[Sending task]: [msgQSend(qid,"abcdef" ,6, NO_WAIT, 5)] returned OK
[Sending task]: [msgQSend(qid,"a" ,1, NO_WAIT, MSG_PRI_NORMAL)]
returned OK
[Sending task]: [msgQSend(qid,"abcdefgh" ,8, NO_WAIT, MSG_PRI_NORMAL)]
returned OK
[Receiving task]: Received 6 bytes from queue
[Receiving task]: Received 1 bytes from queue
[Receiving task]: Received 8 bytes from queue
ANSWER 3
Calling taskInit() with invalid flags won't return any error code.
SPAWN: taskInit(&tcb, "xeno_test3", 113, 0xffffffff,
stack+TASK_STACK_SIZE,
TASK_STACK_SIZE, (FUNCPTR)task_entry_pnt, 0,0,0,0,0,0,0,0,0,0)
INFO: taskInfoGet((int)&tcb, &td) ---> td.td_options = 0xffffffff
The ti funcion returns the following outoput
-> ti "xeno_test3"
NAME ENTRY TID PRI STATUS PC SP ERRNO
DELAY
---------- ------------ -------- --- ---------- -------- --------
------- -----
xeno_test3 task_entry_p 1b66090 113 SUSPEND 1969f8 1b6a250
0 0
stack: base 0x1b6a290 end 0x1b66290 size 16104 high ??? margin
???
options: 0xffffffff
VX_SUPERVISOR_MODE VX_UNBREAKABLE VX_DEALLOC_STACK VX_FP_TASK
VX_STDIO VX_ADA_DEBUG VX_FORTRAN
VX_PRIVATE_ENV VX_NO_STACK_FILL
