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mdbx: add MAX_PAGENO, MIN_PAGENO, MAX_MAPSIZE, MIN_MAPSIZE.

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This commit is contained in:
Leo Yuriev 2017-05-26 17:23:09 +03:00
parent 18cf804d0b
commit 1c170cb866
1 changed files with 11 additions and 2 deletions
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13
src/bits.h
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@ -139,6 +139,8 @@
* size up to 2^44 bytes, in case of 4K pages. */ * size up to 2^44 bytes, in case of 4K pages. */
typedef uint64_t pgno_t; typedef uint64_t pgno_t;
#define PRIaPGNO PRIu64 /* TODO */ #define PRIaPGNO PRIu64 /* TODO */
#define MAX_PAGENO ((pgno_t)UINT64_C(0xffffFFFFffff))
#define MIN_PAGENO (NUM_METAS - 1)
/* A transaction ID. */ /* A transaction ID. */
typedef uint64_t txnid_t; typedef uint64_t txnid_t;
@ -149,6 +151,13 @@ typedef uint64_t txnid_t;
* this is plenty. */ * this is plenty. */
typedef uint16_t indx_t; typedef uint16_t indx_t;
#define MIN_MAPSIZE (MIN_PAGESIZE * MIN_PAGENO)
#define MAX_MAPSIZE \
((sizeof(size_t) < 8) \
? UINT32_C(0x7ff80000) \
: ((sizeof(pgno_t) > 4) ? UINT64_C(0x7fffFFFFfff80000) \
: MAX_PAGENO * (uint64_t)MAX_PAGESIZE))
/*----------------------------------------------------------------------------*/ /*----------------------------------------------------------------------------*/
/* Core structures for database and shared memory (i.e. format definition) */ /* Core structures for database and shared memory (i.e. format definition) */
#pragma pack(push, 1) #pragma pack(push, 1)
@ -966,7 +975,7 @@ static __inline pgno_t NODEPGNO(const MDBX_node *node) {
if (UNALIGNED_OK) { if (UNALIGNED_OK) {
pgno = node->mn_ksize_and_pgno; pgno = node->mn_ksize_and_pgno;
if (sizeof(pgno_t) > 4) if (sizeof(pgno_t) > 4)
pgno &= UINT64_C(0xffffFFFFffff); pgno &= MAX_PAGENO;
} else { } else {
pgno = node->mn_lo | ((pgno_t)node->mn_hi << 16); pgno = node->mn_lo | ((pgno_t)node->mn_hi << 16);
if (sizeof(pgno_t) > 4) if (sizeof(pgno_t) > 4)
@ -977,7 +986,7 @@ static __inline pgno_t NODEPGNO(const MDBX_node *node) {
/* Set the page number in a branch node */ /* Set the page number in a branch node */
static __inline void SETPGNO(MDBX_node *node, pgno_t pgno) { static __inline void SETPGNO(MDBX_node *node, pgno_t pgno) {
assert(pgno <= (pgno_t)UINT64_C(0xffffFFFFffff)); assert(pgno <= MAX_PAGENO);
if (UNALIGNED_OK) { if (UNALIGNED_OK) {
if (sizeof(pgno_t) > 4) if (sizeof(pgno_t) > 4)