c9fa0480af
Now the buffers only contain the header and a pointer to the storage area which can be anywhere. This will significantly simplify buffer swapping and will make it possible to map chunks on buffers as well. The buf_empty variable was removed, as now it's enough to have size==0 and area==NULL to designate the empty buffer (thus a non-allocated head is the empty buffer by default). buf_wanted for now is indicated by size==0 and area==(void *)1. The channels and the checks now embed the buffer's head, and the only pointer is to the storage area. This slightly increases the unallocated buffer size (3 extra ints for the empty buffer) but considerably simplifies dynamic buffer management. It will also later permit to detach unused checks. The way the struct buffer is arranged has proven quite efficient on a number of tests, which makes sense given that size is always accessed and often first, followed by the othe ones. |
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