NAME
AllocAbs -- allocate at a given location
SYNOPSIS
memoryBlock = AllocAbs(byteSize, location)
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void *AllocAbs(ULONG, APTR);FUNCTION
This function attempts to allocate memory at a given absolute memory location. Often this is used by boot-surviving entities such as recoverable ram-disks. If the memory is already being used, or if there is not enough memory to satisfy the request, AllocAbs will return NULL.
This block may not be exactly the same as the requested block because of rounding, but if the return value is non-zero, the block is guaranteed to contain the requested range.
INPUTS
byteSize - the size of the desired block in bytes This number is rounded up to the next larger block size for the actual allocation. location - the address where the memory MUST be.
RESULT memoryBlock - a pointer to the newly allocated memory block, or NULL if failed.
NOTE If the free list is corrupt, the system will panic with alert AN_MemCorrupt, $01000005.
The 8 bytes past the end of an AllocAbs will be changed by Exec relinking the next block of memory. Generally you can't trust the first 8 bytes of anything you AllocAbs.
SEE ALSO