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mdbx: refine mdbx_txl_alloc().

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