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mdbx: auto-reset running transaction in mdbx_txn_renew().

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Change-Id: If93ad13bb5a6dab8dd5fcb80882b5eb83fdf3dad
This commit is contained in:
Leonid Yuriev 2020-04-25 16:13:31 +03:00
parent 3b741a6d5f
commit eea1432e80
2 changed files with 24 additions and 8 deletions
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22
mdbx.h
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@ -2509,7 +2509,16 @@ LIBMDBX_API int mdbx_txn_abort(MDBX_txn *txn);
*
* [in] txn A transaction handle returned by mdbx_txn_begin().
*
* Returns A non-zero error value on failure and 0 on success. */
* Returns A non-zero error value on failure and 0 on success, some
* possible errors are:
* - MDBX_PANIC = a fatal error occurred earlier and the environment
* must be shut down.
* - MDBX_BAD_TXN = transaction is already fihished or never began.
* - MDBX_EBADSIGN = transaction object has invalid signature,
* e.g. transaction was already terminated
* or memory was corrupted.
* - MDBX_THREAD_MISMATCH = given transaction is not owned by current thread.
* - MDBX_EINVAL = transaction handle is NULL. */
LIBMDBX_API int mdbx_txn_reset(MDBX_txn *txn);
/* Renew a read-only transaction.
@ -2522,9 +2531,14 @@ LIBMDBX_API int mdbx_txn_reset(MDBX_txn *txn);
*
* Returns A non-zero error value on failure and 0 on success, some
* possible errors are:
* - MDBX_PANIC = a fatal error occurred earlier and the environment
* must be shut down.
* - MDBX_EINVAL = an invalid parameter was specified. */
* - MDBX_PANIC = a fatal error occurred earlier and the environment
* must be shut down.
* - MDBX_BAD_TXN = transaction is already fihished or never began.
* - MDBX_EBADSIGN = transaction object has invalid signature,
* e.g. transaction was already terminated
* or memory was corrupted.
* - MDBX_THREAD_MISMATCH = transaction is running by other thread.
* - MDBX_EINVAL = transaction handle is NULL. */
LIBMDBX_API int mdbx_txn_renew(MDBX_txn *txn);
/* The fours integers markers (aka "canary") associated with the environment.

10
src/core.c
View File

@ -6138,8 +6138,6 @@ static __always_inline int check_txn_rw(const MDBX_txn *txn, int bad_bits) {
}
int mdbx_txn_renew(MDBX_txn *txn) {
int rc;
if (unlikely(!txn))
return MDBX_EINVAL;
@ -6149,8 +6147,12 @@ int mdbx_txn_renew(MDBX_txn *txn) {
if (unlikely((txn->mt_flags & MDBX_RDONLY) == 0))
return MDBX_EINVAL;
if (unlikely(txn->mt_owner != 0))
return MDBX_THREAD_MISMATCH;
int rc;
if (unlikely(txn->mt_owner != 0 || !(txn->mt_flags & MDBX_TXN_FINISHED))) {
rc = mdbx_txn_reset(txn);
if (unlikely(rc != MDBX_SUCCESS))
return rc;
}
rc = mdbx_txn_renew0(txn, MDBX_RDONLY);
if (rc == MDBX_SUCCESS) {