posix/malloc_hoard2/superblock.h

21   superblock.h
23   The superblock class controls a number of blocks (which are
45 class superblock {
47 		// Construct a superblock for a given size class and set the heap
49 		superblock(int numblocks, int sizeclass, hoardHeap *owner);
50 		~superblock(void) {}
52 		// Make (allocate or re-use) a superblock for a given size class.
53 		static superblock *makeSuperblock(int sizeclass, processHeap *pHeap);
55 		// Find out who allocated this superblock.
58 		// Set the superblock's owner.
61 		// Get a block from the superblock.
64 		// Put a block back in the superblock.
73 		// What size class are blocks in this superblock?
76 		// Insert this superblock before the next one.
77 		inline void insertBefore(superblock *nextSb);
79 		// Return the next pointer (to the next superblock in the list).
80 		inline superblock *const getNext(void);
82 		// Return the prev pointer (to the previous superblock in the list).
83 		inline superblock *const getPrev(void);
85 		// Compute the 'fullness' of this superblock.
88 		// Return the 'fullness' of this superblock.
96 		// Remove this superblock from its linked list.
99 		// Is this superblock valid? (i.e.,
118 		superblock(const superblock &);
119 		const superblock & operator=(const superblock &);
128 		const int _sizeClass;		// The size class of blocks in the superblock.
129 		const int _numBlocks;		// The number of blocks in the superblock.
131 		int _fullness;				// How full is this superblock?
134 		hoardHeap *_owner;			// The heap who owns this superblock.
135 		superblock *_next;			// The next superblock in the list.
136 		superblock *_prev;			// The previous superblock in the list.
138 		hoardLockType _upLock;		// Lock this when moving a superblock to the global (process) heap.
141 		// first block (which immediately follows the superblock).
147 superblock::getOwner(void)
156 superblock::setOwner(hoardHeap *o)
164 superblock::getBlock(void)
167 	// Pop off a block from this superblock's freelist,
188 superblock::putBlock(block *b)
191 	// Push a block onto the superblock's freelist.
203 superblock::getNumAvailable(void)
211 superblock::getNumBlocks(void)
219 superblock::getBlockSizeClass(void)
226 superblock * const
227 superblock::getNext(void)
233 superblock * const
234 superblock::getPrev(void)
242 superblock::insertBefore(superblock * nextSb)
245 	// Insert this superblock before the next one (nextSb).
256 superblock::remove(void)
258 	// Remove this superblock from a doubly-linked list.
270 superblock::isValid(void)
280 superblock::computeFullness(void)
289 superblock::getFullness(void)