pget_mpf

ipget_mpf

Outline

Acquire fixed-sized memory block (polling).

C format

 ER      pget_mpf (ID mpfid, VP *p_blk);

 ER      ipget_mpf (ID mpfid, VP *p_blk);

Parameter(s)

I/O	Parameter	Description
I	ID mpfid;	ID number of the fixed-sized memory pool from which a memory block is acquired.
O	VP *p_blk;	Start address of the acquired memory block.

Explanation

This service call acquires the fixed-sized memory block from the fixed-sized memory pool specified by parameter mpfid and stores the start address in the area specified by parameter p_blk.

If a fixed-sized memory block could not be acquired from the target fixed-sized memory pool (no available fixed-sized memory blocks exist) when this service call is issued, fixed-sized memory block acquisition processing is not performed but "E_TMOUT" is returned.

Note 1 The RI850V4 does not perform memory clear processing when acquiring a fixed-sized memory block. The contents of the acquired fixed-sized memory block are therefore undefined.

Note 2 If no fixed-size memory blocks could be acquired from the target fixed-size memory pool (no available fixed-size memory blocks exist) when this service call is issued, the contents in the area specified by parameter p_blk become undefined.

Return value

Macro	Value	Description
E_OK	0	Normal completion.
E_ID	-18	Invalid ID number. - mpfid < 0x0 - mpfid > Maximum ID number
E_CTX	-25	Context error. - This service call was issued in the CPU locked state.
E_NOEXS	-42	Non-existent object. - Specified fixed-sized memory pool is not registered.
E_TMOUT	-50	Polling failure. - There is no free memory block in the target fixed-sized memory pool.