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package bolt
import (
"unsafe"
)
const MinPageKeys = 2
const FillThreshold = 250 // 25%
const (
BranchPage = 0x01
LeafPage = 0x02
OverflowPage = 0x04
MetaPage = 0x08
DirtyPage = 0x10 /**< dirty page, also set for #P_SUBP pages */
SubPage = 0x40
KeepPage = 0x8000 /**< leave this page alone during spill */
)
// maxCommitPages is the maximum number of pages to commit in one writev() call.
const maxCommitPages 64
/* max bytes to write in one call */
const maxWriteByteCount 0x80000000U // TODO: #define MAX_WRITE 0x80000000U >> (sizeof(ssize_t) == 4))
// TODO:
// #if defined(IOV_MAX) && IOV_MAX < MDB_COMMIT_PAGES
// #undef MDB_COMMIT_PAGES
// #define MDB_COMMIT_PAGES IOV_MAX
// #endif
// TODO: #define MDB_PS_MODIFY 1
// TODO: #define MDB_PS_ROOTONLY 2
// TODO: #define MDB_PS_FIRST 4
// TODO: #define MDB_PS_LAST 8
// TODO: #define MDB_SPLIT_REPLACE MDB_APPENDDUP /**< newkey is not new */
type page struct {
header struct {
id int
next *page // (?)
lower int
upper int
overflowPageCount int
}
metadata []byte
}
type pageState struct {
head int /**< Reclaimed freeDB pages, or NULL before use */
last int /**< ID of last used record, or 0 if !mf_pghead */
}
// nodeCount returns the number of nodes on the page.
func (p *page) nodeCount() int {
return 0 // (p.header.lower - unsafe.Sizeof(p.header) >> 1
}
// remainingSize returns the number of bytes left in the page.
func (p *page) remainingSize() int {
return p.header.upper - p.header.lower
}
// remainingSize returns the number of bytes left in the page.
func (p *page) remainingSize() int {
return p.header.upper - p.header.lower
}
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