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9.2.1 struct x1f4_trans_type

typedef struct x1f4_trans_type {
    int (*free) (void *, void *), (*link) (void *, void **, unsigned),
	(*mode) (void *, void **, unsigned);
    void *data;
} x1f4_trans_type;

The struct x1f4_trans_type record describes a memory allocation context.

data

the pointer passed as the first argument to the memory allocation methods.

link

the memory allocation method.

It is passed the memory allocator context, some address to store the address of the newly allocated memory segment at and the minimum size (expressed in bytes) of the memory segment to allocate that will make it usable as arguments, in this order.

The method is expected to return 0 for success, non zero for failure.

mode

the memory reallocation method.

It is passed the memory allocator context, the address at which the address of the memory segment to reallocate is stored and at which the address of the reallocated memory segment is to be stored at and the minimum size (expressed in bytes) of the memory segment to reallocate that will make it usable as arguments, in this order.

The method is not required to recognize NULL for the segment to reallocate as not yet allocated and its users will not depends on such behavior.

The method is expected to return 0 for success, non zero for failure.

free

the memory deallocation method.

It is passed the memory allocator context and the address of the memory segment to deallocate as arguments, in this order.

The method is expected to return 0 for success, non zero for failure.