mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-02-02 03:51:50 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

[t:4953], add some comments

Browse source 
git-svn-id: file:///svn/toku/tokudb@44205 c7de825b-a66e-492c-adef-691d508d4ae1
This commit is contained in:
Zardosht Kasheff 2013-04-17 00:00:43 -04:00 • committed by Yoni Fogel
parent 15b113f399
commit eeb3b0d231
2 changed files with 8 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
ft/log-internal.h
View file

@ -172,7 +172,8 @@ struct tokutxn {
// Protected by the txn manager lock:
TOKUTXN_STATE state;
struct toku_list prepared_txns_link; // list of prepared transactions
uint32_t num_pin;
uint32_t num_pin; // number of threads (all hot indexes) that want this
// txn to not transition to commit or abort
};
static inline int

6
ft/txn_manager.c
View file

@ -774,11 +774,17 @@ exit:
}
// needed for hot indexing
// prevents a client thread from transitioning txn from LIVE|PREPAREING -> COMMITTING|ABORTING
// hot indexing may need a transactions to stay in the LIVE|PREPARING state while it processes
// a leafentry.
void toku_txn_manager_pin_live_txn_unlocked(TXN_MANAGER UU(txn_manager), TOKUTXN txn) {
assert(txn->state == TOKUTXN_LIVE || txn->state == TOKUTXN_PREPARING);
txn->num_pin++;
}
// allows a client thread to go back to being able to transition txn
// from LIVE|PREPAREING -> COMMITTING|ABORTING
void toku_txn_manager_unpin_live_txn_unlocked(TXN_MANAGER txn_manager, TOKUTXN txn) {
assert(txn->state == TOKUTXN_LIVE || txn->state == TOKUTXN_PREPARING);
assert(txn->num_pin > 0);