bt_page.c File Reference

#include <sys/types.h>
#include <stdio.h>
#include "../include/db.h"
#include "btree.h"

Include dependency graph for bt_page.c:

Go to the source code of this file.

Functions
int	__bt_free (BTREE *t, PAGE *h)
PAGE *	__bt_new (BTREE *t, pgno_t *npg)

Function Documentation

__bt_free()

int __bt_free	(	BTREE *	t,
		PAGE *	h
	)

Definition at line 60 of file bt_page.c.

{
    /* Insert the page at the head of the free list. */
    h->prevpg = P_INVALID;
    h->nextpg = t->bt_free;
    t->bt_free = h->pgno;
    F_SET(t, B_METADIRTY);
 
    /* Make sure the page gets written back. */
    return (mpool_put(t->bt_mp, h, MPOOL_DIRTY));
}

References B_METADIRTY, _btree::bt_free, _btree::bt_mp, F_SET, MPOOL_DIRTY, mpool_put(), _page::nextpg, P_INVALID, _page::pgno, and _page::prevpg.

Referenced by __bt_pdelete(), and __ovfl_delete().

__bt_new()

PAGE * __bt_new	(	BTREE *	t,
		pgno_t *	npg
	)

Definition at line 86 of file bt_page.c.

{
    PAGE *h;
 
    if (t->bt_free != P_INVALID &&
        (h = mpool_get(t->bt_mp, t->bt_free, 0)) != NULL) {
        *npg = t->bt_free;
        t->bt_free = h->nextpg;
        F_SET(t, B_METADIRTY);
        return (h);
    }
    return (mpool_new(t->bt_mp, npg));
}

References B_METADIRTY, _btree::bt_free, _btree::bt_mp, F_SET, mpool_get(), mpool_new(), _page::nextpg, NULL, and P_INVALID.

Referenced by __ovfl_put(), bt_page(), and bt_root().