bt_close.c File Reference

#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../include/db.h"
#include "btree.h"

Include dependency graph for bt_close.c:

Go to the source code of this file.

Functions
int	__bt_close (DB *dbp)
int	__bt_sync (DB *dbp, u_int flags) const
static int bt_meta	__P ((BTREE *))
static int	bt_meta (BTREE *t)

Function Documentation

__bt_close()

int __bt_close

(

DB *

dbp

)

Definition at line 64 of file bt_close.c.

References __bt_sync(), _btree::bt_cursor, _btree::bt_fd, _btree::bt_mp, _btree::bt_pinned, _btree::bt_rdata, _btree::bt_rkey, DBT::data, free(), __db::internal, _cursor::key, mpool_close(), mpool_put(), NULL, RET_ERROR, RET_SUCCESS, and DBT::size.

Referenced by __bt_open(), __rec_close(), and __rec_open().

{
   BTREE *t;
   int fd;

   t = dbp->internal;

   /* Toss any page pinned across calls. */
   if (t->bt_pinned != NULL) {
      mpool_put(t->bt_mp, t->bt_pinned, 0);
      t->bt_pinned = NULL;
   }

   /* Sync the tree. */
   if (__bt_sync(dbp, 0) == RET_ERROR)
      return (RET_ERROR);

   /* Close the memory pool. */
   if (mpool_close(t->bt_mp) == RET_ERROR)
      return (RET_ERROR);

   /* Free random memory. */
   if (t->bt_cursor.key.data != NULL) {
      free(t->bt_cursor.key.data);
      t->bt_cursor.key.size = 0;
      t->bt_cursor.key.data = NULL;
   }
   if (t->bt_rkey.data) {
      free(t->bt_rkey.data);
      t->bt_rkey.size = 0;
      t->bt_rkey.data = NULL;
   }
   if (t->bt_rdata.data) {
      free(t->bt_rdata.data);
      t->bt_rdata.size = 0;
      t->bt_rdata.data = NULL;
   }

   fd = t->bt_fd;
   free(t);
   free(dbp);
   return (close(fd) ? RET_ERROR : RET_SUCCESS);
}

__bt_sync()

int __bt_sync	(	DB *	dbp,
		u_int	flags
	)		const

Definition at line 119 of file bt_close.c.

References B_INMEM, B_METADIRTY, B_MODIFIED, B_RDONLY, bt_meta(), _btree::bt_mp, _btree::bt_pinned, errno, F_CLR, F_ISSET, __db::internal, mpool_put(), mpool_sync(), NULL, RET_ERROR, RET_SUCCESS, and status.

Referenced by __bt_close(), __bt_open(), and __rec_sync().

{
   BTREE *t;
   int status;

   t = dbp->internal;

   /* Toss any page pinned across calls. */
   if (t->bt_pinned != NULL) {
      mpool_put(t->bt_mp, t->bt_pinned, 0);
      t->bt_pinned = NULL;
   }

   /* Sync doesn't currently take any flags. */
   if (flags != 0) {
      errno = EINVAL;
      return (RET_ERROR);
   }

   if (F_ISSET(t, B_INMEM | B_RDONLY) || !F_ISSET(t, B_MODIFIED))
      return (RET_SUCCESS);

   if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR)
      return (RET_ERROR);

   if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS)
      F_CLR(t, B_MODIFIED);

   return (status);
}

__P()

static int bt_meta __P ( (BTREE *)  )

static

bt_meta()

static int bt_meta ( BTREE *  t )

static

Definition at line 162 of file bt_close.c.

References _btree::bt_free, _btree::bt_mp, _btree::bt_nrecs, _btree::bt_psize, BTREEMAGIC, BTREEVERSION, F_ISSET, _btmeta::flags, _btmeta::free, _btmeta::magic, MPOOL_DIRTY, mpool_get(), mpool_put(), _btmeta::nrecs, NULL, P_META, _btmeta::psize, RET_ERROR, RET_SUCCESS, SAVEMETA, and _btmeta::version.

Referenced by __bt_sync().

{
   BTMETA m;
   void *p;

   if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL)
      return (RET_ERROR);

   /* Fill in metadata. */
   m.magic = BTREEMAGIC;
   m.version = BTREEVERSION;
   m.psize = t->bt_psize;
   m.free = t->bt_free;
   m.nrecs = t->bt_nrecs;
   m.flags = F_ISSET(t, SAVEMETA);

   memmove(p, &m, sizeof(BTMETA));
   mpool_put(t->bt_mp, p, MPOOL_DIRTY);
   return (RET_SUCCESS);
}