zircon/third_party/ulib/jemalloc/include/jemalloc/internal/base_structs.h

#ifndef JEMALLOC_INTERNAL_BASE_STRUCTS_H
#define JEMALLOC_INTERNAL_BASE_STRUCTS_H

/* Embedded at the beginning of every block of base-managed virtual memory. */
struct base_block_s {
	/* Total size of block's virtual memory mapping. */
	size_t		size;

	/* Next block in list of base's blocks. */
	base_block_t	*next;

	/* Tracks unused trailing space. */
	extent_t	extent;
};

struct base_s {
	/* Associated arena's index within the arenas array. */
	unsigned	ind;

	/* User-configurable extent hook functions. */
	union {
		extent_hooks_t	*extent_hooks;
		void		*extent_hooks_pun;
	};

	/* Protects base_alloc() and base_stats_get() operations. */
	malloc_mutex_t	mtx;

	/* Serial number generation state. */
	size_t		extent_sn_next;

	/* Chain of all blocks associated with base. */
	base_block_t	*blocks;

	/* Heap of extents that track unused trailing space within blocks. */
	extent_heap_t	avail[NSIZES];

	/* Stats, only maintained if config_stats. */
	size_t		allocated;
	size_t		resident;
	size_t		mapped;
};

#endif /* JEMALLOC_INTERNAL_BASE_STRUCTS_H */