ISAR/libmdbx
3
0
Fork 0
mirror of https://github.com/isar/libmdbx.git synced 2025-01-04 16:24:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

mdbx: refine mdbx_txl_alloc().

Browse Source 
Change-Id: I624a92c8a845ab563f13619b3638227d012a780b
This commit is contained in:
Leo Yuriev 2017-07-23 15:48:34 +03:00
parent d5a8bcebbf
commit 3ba5bebec4
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/mdbx.c
View File

@ -176,10 +176,14 @@ static MDBX_IDL mdbx_midl_alloc(size_t size) {
return ids;
}
static MDBX_TXL mdbx_txl_alloc(size_t size) {
MDBX_TXL ptr = malloc((size + 2) * sizeof(txnid_t));
static MDBX_TXL mdbx_txl_alloc(void) {
const size_t malloc_overhead = sizeof(void *) * 2;
const size_t bytes = mdbx_roundup2(malloc_overhead + sizeof(txnid_t) * 61,
MDBX_CACHELINE_SIZE) -
malloc_overhead;
MDBX_TXL ptr = malloc(bytes);
if (likely(ptr)) {
*ptr++ = size;
*ptr++ = bytes / sizeof(txnid_t) - 2;
*ptr = 0;
}
return ptr;
@ -1774,7 +1778,7 @@ static int mdbx_page_alloc(MDBX_cursor *mc, unsigned num, MDBX_page **mp,
goto fail;
if ((flags & MDBX_LIFORECLAIM) && !txn->mt_lifo_reclaimed) {
txn->mt_lifo_reclaimed = mdbx_txl_alloc(env->me_maxfree_1pg);
txn->mt_lifo_reclaimed = mdbx_txl_alloc();
if (unlikely(!txn->mt_lifo_reclaimed)) {
rc = MDBX_ENOMEM;
goto fail;
@ -3045,7 +3049,7 @@ again:
}
if (unlikely(!txn->mt_lifo_reclaimed)) {
txn->mt_lifo_reclaimed = mdbx_txl_alloc(env->me_maxfree_1pg);
txn->mt_lifo_reclaimed = mdbx_txl_alloc();
if (unlikely(!txn->mt_lifo_reclaimed)) {
rc = MDBX_ENOMEM;
goto bailout;