//! Construct a block of given size.
static ByteBlockPtr Allocate(
size_t block_size, BlockPool& block_pool) {
// this counts only the bytes and excludes the header. why? -tb
block_pool.AllocateBlock(block_size);
// allocate a new block of uninitialized memory
ByteBlock* block =
static_cast<ByteBlock*>(
operator new (
sizeof(common::ReferenceCount) + sizeof(head) + block_size));
// initialize block using constructor
new (block)ByteBlock(block_size, &block_pool);
// wrap allocated ByteBlock in a shared_ptr. TODO(tb) figure out how to do
// this whole procedure with std::make_shared.
return ByteBlockPtr(block);
}
ByteBlockPtr AllocateByteBlock(size_t block_size) final {
if (available_ < block_size) return ByteBlockPtr();
available_ -= block_size;
return BlockSink::AllocateByteBlock(block_size);
}
//! Releases the reference to the ByteBlock and resets book-keeping info
void Release() {
byte_block_ = ByteBlockPtr();
}
