gecko-dev/db/cxx/cxx_mpool.cpp
1998-10-15 03:56:37 +00:00

244 lines
5.6 KiB
C++

/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997, 1998
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)cxx_mpool.cpp 10.9 (Sleepycat) 5/2/98";
#endif /* not lint */
#include "db_cxx.h"
#include "cxx_int.h"
#include <errno.h>
////////////////////////////////////////////////////////////////////////
// //
// DbMpoolFile //
// //
////////////////////////////////////////////////////////////////////////
DbMpoolFile::DbMpoolFile()
: imp_(0)
{
}
DbMpoolFile::~DbMpoolFile()
{
}
int DbMpoolFile::open(DbMpool *mp, const char *file,
u_int32_t flags, int mode, size_t pagesize,
DB_MPOOL_FINFO *finfop, DbMpoolFile **result)
{
int err;
DB_MPOOLFILE *mpf;
if ((err = memp_fopen(unwrap(mp), file, flags, mode, pagesize,
finfop, &mpf)) != 0) {
DB_ERROR("DbMpoolFile::open", err);
return err;
}
*result = new DbMpoolFile();
(*result)->imp_ = wrap(mpf);
return 0;
}
int DbMpoolFile::close()
{
DB_MPOOLFILE *mpf = unwrap(this);
int err = 0;
if (!mpf) {
err = EINVAL;
}
else if ((err = memp_fclose(mpf)) != 0) {
DB_ERROR("DbMpoolFile::close", err);
return err;
}
imp_ = 0; // extra safety
// This may seem weird, but is legal as long as we don't access
// any data before returning.
//
delete this;
return 0;
}
int DbMpoolFile::get(db_pgno_t *pgnoaddr, u_int32_t flags, void *pagep)
{
DB_MPOOLFILE *mpf = unwrap(this);
int err = 0;
if (!mpf) {
err = EINVAL;
}
else if ((err = memp_fget(mpf, pgnoaddr, flags, pagep)) != 0) {
DB_ERROR("DbMpoolFile::get", err);
}
return err;
}
int DbMpoolFile::put(void *pgaddr, u_int32_t flags)
{
DB_MPOOLFILE *mpf = unwrap(this);
int err = 0;
if (!mpf) {
err = EINVAL;
}
else if ((err = memp_fput(mpf, pgaddr, flags)) != 0) {
DB_ERROR("DbMpoolFile::put", err);
}
return err;
}
int DbMpoolFile::set(void *pgaddr, u_int32_t flags)
{
DB_MPOOLFILE *mpf = unwrap(this);
int err = 0;
if (!mpf) {
err = EINVAL;
}
else if ((err = memp_fset(mpf, pgaddr, flags)) != 0) {
DB_ERROR("DbMpoolFile::set", err);
}
return err;
}
int DbMpoolFile::sync()
{
DB_MPOOLFILE *mpf = unwrap(this);
int err = 0;
if (!mpf) {
err = EINVAL;
}
else if ((err = memp_fsync(mpf)) != 0) {
DB_ERROR("DbMpoolFile::sync", err);
}
return err;
}
////////////////////////////////////////////////////////////////////////
// //
// DbMpool //
// //
////////////////////////////////////////////////////////////////////////
DbMpool::DbMpool()
: imp_(0)
{
}
DbMpool::~DbMpool()
{
}
int DbMpool::close()
{
DB_MPOOL *mpool = unwrap(this);
int err;
if (!mpool) {
return EINVAL; // already closed
}
if ((err = memp_close(mpool)) != 0) {
DB_ERROR("DbMpool::close", err);
return err;
}
imp_ = 0; // extra safety
// This may seem weird, but is legal as long as we don't access
// any data before returning.
//
delete this;
return 0;
}
int DbMpool::db_register(int ftype,
int (*pgin)(db_pgno_t pgno, void *pgaddr, DBT *pgcookie),
int (*pgout)(db_pgno_t pgno, void *pgaddr, DBT *pgcookie))
{
DB_MPOOL *mpool = unwrap(this);
int err = 0;
if (!mpool) {
err = EINVAL;
}
else if ((err = memp_register(mpool, ftype, pgin, pgout)) != 0) {
DB_ERROR("DbMpool::db_register", err);
return err;
}
return err;
}
int DbMpool::stat(DB_MPOOL_STAT **gsp, DB_MPOOL_FSTAT ***fsp,
void *(*alternate_malloc)(size_t))
{
DB_MPOOL *mpool = unwrap(this);
int err = 0;
if (!mpool) {
err = EINVAL;
}
else if ((err = memp_stat(mpool, gsp, fsp, alternate_malloc)) != 0) {
DB_ERROR("DbMpool::stat", err);
return err;
}
return err;
}
int DbMpool::sync(DbLsn *sn)
{
DB_MPOOL *mpool = unwrap(this);
int err = 0;
if (!mpool) {
err = EINVAL;
}
else if ((err = memp_sync(mpool, sn)) != 0) {
DB_ERROR("DbMpool::sync", err);
return err;
}
return err;
}
int DbMpool::trickle(int pct, int *nwrotep)
{
DB_MPOOL *mpool = unwrap(this);
int err = 0;
if (!mpool) {
err = EINVAL;
}
else if ((err = memp_trickle(mpool, pct, nwrotep)) != 0) {
DB_ERROR("DbMpool::trickle", err);
return err;
}
return err;
}
// static method
int DbMpool::open(const char *dir, u_int32_t flags, int mode,
DbEnv *dbenv, DbMpool **regionp)
{
*regionp = 0;
DB_MPOOL *result = 0;
int err;
if ((err = memp_open(dir, flags, mode, dbenv, &result)) != 0) {
DB_ERROR("DbMpool::open", err);
return err;
}
*regionp = new DbMpool();
(*regionp)->imp_ = wrap(result);
return 0;
}
// static method
int DbMpool::unlink(const char *dir, int force, DbEnv *dbenv)
{
int err;
if ((err = memp_unlink(dir, force, dbenv)) != 0) {
DB_ERROR("DbMpool::unlink", err);
return err;
}
return err;
}