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): 58/96頁
文件大?。?/td> 265K
代理商: RX78K4
CHAPTER 4 RX78K/IV SYSTEM CALL LIST
49
4.2.8
wai_sem (Wait on Semaphore)
[Function]
Executes wait manipulation for a semaphore (P instruction).
[Remarks]
If the count value of the semaphore indicated by semid is 1 or more, the count value of the semaphore is
decremented by one, and to the task that issued this system call. If the count value of the semaphore is 0, the
count value of the semaphore is not changed, and the task that has issued this system call is placed in the
WAIT state.
[System call ID number]
wai_sem = 17
[Parameter]
semid (Semaphore Identifier)
Semaphore ID (Semaphore top address)
- 24 bits (large model)
- 16 bits (small model)
[Return parameter]
E_OK
Normal termination
[Assembler format]
[Large model]
MOV
MOVW
MOV
CALLT
[Small model]
MOV
MOVW
CALLT
bnk0_b, #17
bnk0_up, #semid
bnk0_d, #semid
[40H]
:
bnk0_b, #17
bnk0_up, #semid
[40H]
:
C register = return parameter
C register = return parameter
[C format]
ret = wai_sem(semid);
char
*semid;
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