參數(shù)資料
型號: RX78K4
英文描述: 78K/IV Series Real-Time OS Fundamental | User's Manual[01/1997]
中文描述: 78K/IV系列實時操作系統(tǒng)的基本|用戶手冊[01/1997]
文件頁數(shù): 44/96頁
文件大?。?/td> 265K
代理商: RX78K4
CHAPTER 4 RX78K/IV SYSTEM CALL LIST
35
4.1.5
rot_rdq (Rotate Ready Queue)
irot_rdq (Rotate Ready Queue for Interrupt)
[Function]
Rotates the ready queue of the specified priority.
[Remarks]
Rotates the ready queue of the priority indicated by tskpri. Consequently, the task placed at the top of the
ready queue is placed at the end of the queue and execution of the task of the same priority is changed.
When tskpri = 0, the ready queue of the priority of the task itself is rotated. Therefore, this system call can be
issued to relinquish execution privileges so that the task itself is placed at the end of the ready queue.
However, irot_rdq cannot specify tskpri = 0.
If no task exists in the ready queue of the specified priority, nothing is executed, but this does not result in an
error.
[System call ID number]
rot_rdq = 4
[Parameter]
tskpri (Task Priority)
Task priority
- 8 bits
[Return parameter]
E_OK
Normal termination
[Assembler format]
On issuing rot_rdq
[Large/Small model]
MOV
MOV
CALLT
bnk0_v, #4
bnk0_e, #tskpri
[40H]
:
C register = return parameter
On issuing irot_rdq
[Large/Small model]
MOV
CALLT
E, #tskpri
[44H]
:
C register = return parameter
[C format]
On issuing rot_rdq
ret = rot_rdq (tskpri);
char
On issuing irot_rdq
ret = irot_rdq (tskpri);
char
tskpri;
tskpri;
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