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Docs » Autodocs » exec.library » FreePooled

NAME

	FreePooled -- Free pooled memory  (V39)

SYNOPSIS

	FreePooled(poolHeader,memory,memSize)
a0 a1 d0
void FreePooled(void *,void *,ULONG);

FUNCTION

	Deallocates memory allocated by AllocPooled().  The size of the
allocation *MUST* match the size given to AllocPooled().
The reason the pool functions do not track individual allocation
sizes is because many of the uses of pools have small allocation
sizes and the tracking of the size would be a large overhead.
Only memory allocated by AllocPooled() may be freed with this
function!
Doing a DeletePool() on the pool will free all of the puddles
and thus all of the allocations done with AllocPooled() in that
pool. (No need to FreePooled() each allocation)

INPUTS

	memory - pointer to memory allocated by AllocPooled.
poolHeader - a specific private pool header.

NOTES

	The pool function do not protect an individual pool from
multiple accesses. The reason is that in most cases the pools
will be used by a single task. If your pool is going to
be used by more than one task you must Semaphore protect
the pool from having more than one task trying to allocate
within the same pool at the same time. Warning: Forbid()
protection *will not work* in the future. *Do NOT* assume
that we will be able to make it work in the future. FreePooled()
may well break a Forbid() and as such can only be protected
by a semaphore.
To track sizes yourself, the following code can be used:
Assumes a6=ExecBase
;
; Function to do AllocVecPooled(Pool,memSize)
;
AllocVecPooled: addq.l #4,d0 ; Get space for tracking
move.l d0,-(sp) ; Save the size
jsr _LVOAllocPooled(a6) ; Call pool...
move.l (sp)+,d1 ; Get size back...
tst.l d0 ; Check for error
beq.s avp_fail ; If NULL, failed!
move.l d0,a0 ; Get pointer...
move.l d1,(a0)+ ; Store size
move.l a0,d0 ; Get result
avp_fail: rts ; return
;
; Function to do FreeVecPooled(pool,memory)
;
FreeVecPooled: move.l -(a1),d0 ; Get size / ajust pointer
jmp _LVOFreePooled(a6)

SEE ALSO

AllocPooled(), CreatePool(), DeletePool()

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