page.h

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#ifndef __xwos_mm_mempool_page_h__
#define __xwos_mm_mempool_page_h__
 
#include <xwos/standard.h>
#include <xwos/lib/bclst.h>
#include <xwos/lib/rbtree.h>
#include <xwos/osal/lock/seqlock.h>
#include <xwos/mm/common.h>
 
#include <xwos/mm/mempool/i_allocator.h>
 
#define XWMM_MEMPOOL_PAGE_ORDER_CMB             (XWSQ_MAX)
#define XWMM_MEMPOOL_PAGE_MAPPING_FREE          (0U)
#define XWMM_MEMPOOL_PAGE_MAPPING_INVAILD       (XWPTR_MAX)
 
struct xwmm_mempool_page {
        xwsq_t order; 
        xwptr_t mapping; 
        union {
                struct {
                        struct xwlib_rbtree_node rbnode; 
                        xwsq_t seq; 
                } free; 
                struct {
                        struct xwlib_bclst_node node; 
                        atomic_xwlfq_t objhead; 
                        xwsq_t refcnt; 
                } objcache; 
        } attr;
 
        union {
                void * pointer;
                xwsq_t value;
        } data; 
};
 
struct xwmm_mempool_page_allocator;
 
struct xwmm_mempool_page_odrbtree {
        struct xwlib_rbtree tree; 
        struct xwmm_mempool_page * leftmost; 
        xwsq_t order; 
        struct xwmm_mempool_page_allocator * owner; 
        struct xwos_sqlk lock; 
};
 
struct xwmm_mempool_page_allocator {
        struct xwmm_mempool_i_allocator i_a; 
        struct xwmm_zone zone; 
        const char * name; 
        xwsz_t pgsize; 
        xwsq_t max_order; 
        struct xwmm_mempool_page_odrbtree * odrbtree; 
        struct xwmm_mempool_page * pgarray; 
};
 
xwer_t xwmm_mempool_page_find(struct xwmm_mempool_page_allocator * pa,
                              void * mem,
                              struct xwmm_mempool_page ** pgbuf);
xwer_t xwmm_mempool_page_allocator_init(struct xwmm_mempool_page_allocator * pa,
                                        const char * name,
                                        xwptr_t origin, xwsz_t size, xwsz_t pgsize,
                                        struct xwmm_mempool_page_odrbtree * odrbtree,
                                        struct xwmm_mempool_page * pgarray);
xwer_t xwmm_mempool_page_allocate(struct xwmm_mempool_page_allocator * pa,
                                  xwsq_t order,
                                  struct xwmm_mempool_page ** pgbuf);
xwer_t xwmm_mempool_page_free(struct xwmm_mempool_page_allocator * pa,
                              struct xwmm_mempool_page * pg);
 
#endif /* xwos/mm/mempool/page.h */