ISAR/libmdbx
3
0
Fork 0
mirror of https://github.com/isar/libmdbx.git synced 2025-10-19 22:39:04 +08:00
Code Issues Packages Projects Releases Wiki Activity

mdbx: доработка контроля потока-владельца транзакции.

Browse Source 
1. Теперь допускается commit/abort вложенных транзакций из любого треда в режиме MDBX_NOSTICKYTHREADS.

2. Более наглядные/явные проверки без зависимости от больше/меньше.
Одна проверка внутри check_txn() для всех основных случаев (bad_bits != 0) и две проверки для abort/reset/break (bad_bits == 0).

+-------------------------------------------------------------------------------------------------------+
|          Три анализируемых txn->flags       |         Проверка txn->owner == osal_thread_self()       |
+-----------------+------------+--------------+-----------------------+---------------------------------+
| NOSTICKYTHREADS | TXN_RDONLY | TXN_FINISHED | usual (bad_bits != 0) | abort/reset/break (bad_bits==0) |
|      -          |     -      |     -        |     +                 |         +                       |
|      -          |     -      |     +        |     +                 |         +                       |
|      -          |     +      |     -        |     +                 |         +                       |
|      -          |     +      |     +        |     +                 |         -                       |
|      +          |     -      |     -        |     -                 |         -                       |
|      +          |     -      |     +        |     +                 |         +                       |
|      +          |     +      |     -        |     -                 |         -                       |
|      +          |     +      |     +        |     +                 |         -                       |
+-------------------------------------------------------------------------------------------------------+
This commit is contained in:
Леонид Юрьев (Leonid Yuriev)
2024-12-30 17:49:42 +03:00
parent 1e4e2eb3c8
commit 1bf008ac16
2 changed files with 30 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/api-txn.c
View File

@@ -385,6 +385,9 @@ int mdbx_txn_commit_ex(MDBX_txn *txn, MDBX_commit_latency *latency) {
const uint64_t ts_0 = latency ? osal_monotime() : 0;
uint64_t ts_1 = 0, ts_2 = 0, ts_3 = 0, ts_4 = 0, ts_5 = 0, gc_cputime = 0;
/* txn_end() mode for a commit which writes nothing */
unsigned end_mode = TXN_END_PURE_COMMIT | TXN_END_UPDATE | TXN_END_SLOT | TXN_END_FREE;
int rc = check_txn(txn, MDBX_TXN_FINISHED);
if (unlikely(rc != MDBX_SUCCESS)) {
if (rc == MDBX_BAD_TXN && (txn->flags & MDBX_TXN_RDONLY)) {
@@ -404,18 +407,22 @@ int mdbx_txn_commit_ex(MDBX_txn *txn, MDBX_commit_latency *latency) {
goto bailout;
}
if (unlikely(txn->flags & MDBX_TXN_ERROR)) {
rc = MDBX_RESULT_TRUE;
goto fail;
if (unlikely(txn->flags & MDBX_TXN_RDONLY)) {
if (txn->flags & MDBX_TXN_ERROR) {
rc = MDBX_RESULT_TRUE;
goto fail;
}
goto done;
}
/* txn_end() mode for a commit which writes nothing */
unsigned end_mode = TXN_END_PURE_COMMIT | TXN_END_UPDATE | TXN_END_SLOT | TXN_END_FREE;
if (unlikely(txn->flags & MDBX_TXN_RDONLY))
goto done;
if ((txn->flags & MDBX_NOSTICKYTHREADS) && unlikely(txn->owner != osal_thread_self())) {
if (!txn->parent && (txn->flags & MDBX_NOSTICKYTHREADS) && unlikely(txn->owner != osal_thread_self())) {
txn->flags |= MDBX_TXN_ERROR;
rc = MDBX_THREAD_MISMATCH;
return LOG_IFERR(rc);
}
if (unlikely(txn->flags & MDBX_TXN_ERROR)) {
rc = MDBX_RESULT_TRUE;
goto fail;
}