mirror of
https://github.com/isar/libmdbx.git
synced 2025-04-01 02:32:57 +08:00
mdbx: переработка mdbx_txn_release_all_cursors_ex()
.
This commit is contained in:
parent
438d185250
commit
6c8047a402
26
mdbx.h
26
mdbx.h
@ -5269,15 +5269,12 @@ LIBMDBX_API void mdbx_cursor_close(MDBX_cursor *cursor);
|
||||
* \retval MDBX_EINVAL An invalid parameter was specified. */
|
||||
LIBMDBX_API int mdbx_cursor_close2(MDBX_cursor *cursor);
|
||||
|
||||
/** \brief Unbind or closes all cursors of a given transaction.
|
||||
/** \brief Unbind or closes all cursors of a given transaction and of all
|
||||
* its parent transactions if ones are.
|
||||
* \ingroup c_cursors
|
||||
*
|
||||
* Unbinds either closes all cursors associated (opened or renewed) with
|
||||
* a given transaction in a bulk with minimal overhead.
|
||||
*
|
||||
* A transaction should not be nested, since in this case no way to restore
|
||||
* state if this nested transaction will be aborted, nor impossible to define
|
||||
* the expected behavior.
|
||||
* Unbinds either closes all cursors associated (opened, renewed or binded) with
|
||||
* the given transaction in a bulk with minimal overhead.
|
||||
*
|
||||
* \see mdbx_cursor_unbind()
|
||||
* \see mdbx_cursor_close()
|
||||
@ -5292,19 +5289,16 @@ LIBMDBX_API int mdbx_cursor_close2(MDBX_cursor *cursor);
|
||||
* some possible errors are:
|
||||
* \retval MDBX_THREAD_MISMATCH Given transaction is not owned
|
||||
* by current thread.
|
||||
* \retval MDBX_BAD_TXN Given transaction is invalid, nested or has
|
||||
* \retval MDBX_BAD_TXN Given transaction is invalid or has
|
||||
* a child/nested transaction transaction. */
|
||||
LIBMDBX_API int mdbx_txn_release_all_cursors_ex(const MDBX_txn *txn, bool unbind, size_t *count);
|
||||
|
||||
/** \brief Unbind or closes all cursors of a given transaction.
|
||||
/** \brief Unbind or closes all cursors of a given transaction and of all
|
||||
* its parent transactions if ones are.
|
||||
* \ingroup c_cursors
|
||||
*
|
||||
* Unbinds either closes all cursors associated (opened or renewed) with
|
||||
* a given transaction in a bulk with minimal overhead.
|
||||
*
|
||||
* A transaction should not be nested, since in this case no way to restore
|
||||
* state if this nested transaction will be aborted, nor impossible to define
|
||||
* the expected behavior.
|
||||
* Unbinds either closes all cursors associated (opened, renewed or binded) with
|
||||
* the given transaction in a bulk with minimal overhead.
|
||||
*
|
||||
* \see mdbx_cursor_unbind()
|
||||
* \see mdbx_cursor_close()
|
||||
@ -5317,7 +5311,7 @@ LIBMDBX_API int mdbx_txn_release_all_cursors_ex(const MDBX_txn *txn, bool unbind
|
||||
* some possible errors are:
|
||||
* \retval MDBX_THREAD_MISMATCH Given transaction is not owned
|
||||
* by current thread.
|
||||
* \retval MDBX_BAD_TXN Given transaction is invalid, nested or has
|
||||
* \retval MDBX_BAD_TXN Given transaction is invalid or has
|
||||
* a child/nested transaction transaction. */
|
||||
LIBMDBX_INLINE_API(int, mdbx_txn_release_all_cursors, (const MDBX_txn *txn, bool unbind)) {
|
||||
return mdbx_txn_release_all_cursors_ex(txn, unbind, NULL);
|
||||
|
@ -234,28 +234,43 @@ int mdbx_txn_release_all_cursors_ex(const MDBX_txn *txn, bool unbind, size_t *co
|
||||
int rc = check_txn(txn, MDBX_TXN_FINISHED | MDBX_TXN_HAS_CHILD);
|
||||
if (unlikely(rc != MDBX_SUCCESS))
|
||||
return LOG_IFERR(rc);
|
||||
if (unlikely(txn->parent)) {
|
||||
rc = MDBX_BAD_TXN;
|
||||
ERROR("%s, err %d", "must not unbind or close cursors for a nested txn", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
size_t n = 0;
|
||||
TXN_FOREACH_DBI_FROM(txn, i, MAIN_DBI) {
|
||||
while (txn->cursors[i]) {
|
||||
++n;
|
||||
MDBX_cursor *mc = txn->cursors[i];
|
||||
ENSURE(nullptr, mc->signature == cur_signature_live && (mc->next != mc) && !mc->backup);
|
||||
txn->cursors[i] = mc->next;
|
||||
mc->next = mc;
|
||||
mc->signature = cur_signature_ready4dispose;
|
||||
cursor_drown((cursor_couple_t *)mc);
|
||||
if (!unbind) {
|
||||
mc->signature = 0;
|
||||
osal_free(mc);
|
||||
do {
|
||||
TXN_FOREACH_DBI_FROM(txn, i, MAIN_DBI) {
|
||||
MDBX_cursor *mc = txn->cursors[i], *next = nullptr;
|
||||
if (mc) {
|
||||
txn->cursors[i] = nullptr;
|
||||
do {
|
||||
next = mc->next;
|
||||
if (mc->signature == cur_signature_live) {
|
||||
mc->signature = cur_signature_wait4eot;
|
||||
cursor_drown((cursor_couple_t *)mc);
|
||||
} else
|
||||
ENSURE(nullptr, mc->signature == cur_signature_wait4eot);
|
||||
if (mc->backup) {
|
||||
MDBX_cursor *bk = mc->backup;
|
||||
mc->next = bk->next;
|
||||
mc->backup = bk->backup;
|
||||
mc->backup = nullptr;
|
||||
bk->signature = 0;
|
||||
bk = bk->next;
|
||||
osal_free(bk);
|
||||
} else {
|
||||
mc->signature = cur_signature_ready4dispose;
|
||||
mc->next = mc;
|
||||
++n;
|
||||
if (!unbind) {
|
||||
mc->signature = 0;
|
||||
osal_free(mc);
|
||||
}
|
||||
}
|
||||
} while ((mc = next) != nullptr);
|
||||
}
|
||||
}
|
||||
}
|
||||
txn = txn->parent;
|
||||
} while (txn);
|
||||
|
||||
if (count)
|
||||
*count = n;
|
||||
return MDBX_SUCCESS;
|
||||
|
Loading…
x
Reference in New Issue
Block a user