AllocVec returning zero - why? - Page 2

BastyCDGS · 26 September 2020, 10:57

Quote:

Originally Posted by DMWCashy

AllocVec will allocate an extra memory block chunk (I believe this is 8 bytes) for the memory details followed by the required memory. This makes it easy for FreeVec() to verify the block, by simply moving back one block ( Same as modern PC based memory heaps work)

If I remember correctly, the code for AllocVec is something like this:

Code:

    addq.l #4,d0
    move.l d0,-(sp)
    jsr _LVOAllocMem(a6)
    tst.l d0
    beq.s NoMem
    move.l d0,a0
    move.l (sp)+,(a0)+
    move.l a0,d0
    rts
NoMem: addq.l #4,sp
    rts

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Returning to Amiga.	shoestring	New to Emulation or Amiga scene	3	13 June 2020 05:13
Returning Amigan	willbloke	New to Emulation or Amiga scene	8	18 April 2017 11:47
Returning to Amiga after 25 years ...	hedders	New to Emulation or Amiga scene	17	07 May 2015 23:00
Another one returning	GarethPW	Member Introductions	5	06 July 2011 13:14
Returning to Amigas - new to emulation	antonvaltaz	Member Introductions	9	19 May 2009 12:02

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)