[t:4920], [t:4953], separate ydb lock from hot indexing and checkpointing

git-svn-id: file:///svn/toku/tokudb@44202 c7de825b-a66e-492c-adef-691d508d4ae1

ft/checkpoint.c

@@ -20,8 +20,7 @@
  *    to set all the "pending" bits and to create the checkpoint-in-progress versions
  *    of the header and translation table (btt).
  *    The following operations must take the multi_operation_lock:
- *       - insertion into multiple indexes
- *       - "replace-into" (matching delete and insert on a single key)
+ *     - any set of operations that must be atomic with respect to begin checkpoint
  *
  *  - checkpoint_safe_lock
  *    This is a new reader-writer lock.
@@ -35,13 +34,6 @@
  *    The application can use this lock to disable checkpointing during other sensitive
  *    operations, such as making a backup copy of the database.
  *
- *  - ydb_big_lock
- *    This is the existing lock used to serialize all access to tokudb.
- *    This lock is held by the checkpoint function only for as long as is required to 
-
- *    to set all the "pending" bits and to create the checkpoint-in-progress versions
- *    of the header and translation table (btt).
- *    
  * Once the "pending" bits are set and the snapshots are taken of the header and btt,
  * most normal database operations are permitted to resume.
  *
@@ -118,10 +110,6 @@ static LSN last_completed_checkpoint_lsn;
 static toku_pthread_rwlock_t checkpoint_safe_lock;
 static toku_pthread_rwlock_t multi_operation_lock;
 
-// Call through function pointers because this layer has no access to ydb lock functions.
-static void (*ydb_lock)(void)   = NULL;
-static void (*ydb_unlock)(void) = NULL;
-
 static BOOL initialized = FALSE;     // sanity check
 static volatile BOOL locked_mo = FALSE;       // true when the multi_operation write lock is held (by checkpoint)
 static volatile BOOL locked_cs = FALSE;       // true when the checkpoint_safe write lock is held (by checkpoint)
@@ -220,9 +208,7 @@ toku_checkpoint_safe_client_unlock(void) {
 
 // Initialize the checkpoint mechanism, must be called before any client operations.
 void
-toku_checkpoint_init(void (*ydb_lock_callback)(void), void (*ydb_unlock_callback)(void)) {
-    ydb_lock   = ydb_lock_callback;
-    ydb_unlock = ydb_unlock_callback;
+toku_checkpoint_init(void) {
     multi_operation_lock_init();
     checkpoint_safe_lock_init();
     initialized = TRUE;
@@ -280,7 +266,6 @@ toku_checkpoint(CACHETABLE ct, TOKULOGGER logger,
     }
     multi_operation_checkpoint_lock();
     SET_CHECKPOINT_FOOTPRINT(20);
-    ydb_lock();
     toku_ft_open_close_lock();
     
     SET_CHECKPOINT_FOOTPRINT(30);
@@ -289,7 +274,6 @@ toku_checkpoint(CACHETABLE ct, TOKULOGGER logger,
 
     toku_ft_open_close_unlock();
     multi_operation_checkpoint_unlock();
-    ydb_unlock();
 
     SET_CHECKPOINT_FOOTPRINT(40);
     if (r==0) {

ft/checkpoint.h

@@ -58,7 +58,7 @@ void toku_multi_operation_client_unlock(void);
 
 // Initialize the checkpoint mechanism, must be called before any client operations.
 // Must pass in function pointers to take/release ydb lock.
-void toku_checkpoint_init(void (*ydb_lock_callback)(void), void (*ydb_unlock_callback)(void));
+void toku_checkpoint_init(void);
 
 void toku_checkpoint_destroy(void);
 

ft/ft-ops.c

@@ -5423,35 +5423,28 @@ int toku_dump_ft (FILE *f, FT_HANDLE brt) {
     return r;
 }
 
-int toku_ft_layer_init(void (*ydb_lock_callback)(void),
-                  void (*ydb_unlock_callback)(void)) {
+int toku_ft_layer_init(void) {
     int r = 0;
     //Portability must be initialized first
     r = toku_portability_init();
     if (r) { goto exit; }
 
-    toku_checkpoint_init(ydb_lock_callback, ydb_unlock_callback);
+    toku_checkpoint_init();
 
-    r = toku_ft_serialize_layer_init();
-    if (r) { goto exit; }
+    toku_ft_serialize_layer_init();
 
     toku_mutex_init(&ft_open_close_lock, NULL);
 exit:
     return r;
 }
 
-int toku_ft_layer_destroy(void) {
-    int r = 0;    
+void toku_ft_layer_destroy(void) {
     toku_mutex_destroy(&ft_open_close_lock);
 
-    if (r == 0)
-        r = toku_ft_serialize_layer_destroy();
-    if (r==0)
-        toku_checkpoint_destroy();
+    toku_ft_serialize_layer_destroy();
+    toku_checkpoint_destroy();
     //Portability must be cleaned up last
-    if (r==0)
-        r = toku_portability_destroy();
-    return r;
+    toku_portability_destroy();
 }
 
 void toku_ft_open_close_lock(void) {

ft/ft-ops.h

@@ -238,14 +238,12 @@ struct ftstat64_s {
 int 
 toku_ft_handle_stat64 (FT_HANDLE, TOKUTXN, struct ftstat64_s *stat) __attribute__ ((warn_unused_result));
 
-int toku_ft_layer_init(void (*ydb_lock_callback)(void),
-                  void (*ydb_unlock_callback)(void))
-     __attribute__ ((warn_unused_result));
+int toku_ft_layer_init(void) __attribute__ ((warn_unused_result));
 void toku_ft_open_close_lock(void);
 void toku_ft_open_close_unlock(void);
-int toku_ft_layer_destroy(void)  __attribute__ ((warn_unused_result));
-int toku_ft_serialize_layer_init(void) __attribute__ ((warn_unused_result));
-int toku_ft_serialize_layer_destroy(void) __attribute__ ((warn_unused_result));
+void toku_ft_layer_destroy(void);
+void toku_ft_serialize_layer_init(void);
+void toku_ft_serialize_layer_destroy(void);
 
 void toku_maybe_truncate_cachefile (CACHEFILE cf, int fd, u_int64_t size_used);
 // Effect: truncate file if overallocated by at least 32MiB

ft/ft.c

@@ -783,7 +783,7 @@ toku_dictionary_redirect (const char *dst_fname_in_env, FT_HANDLE old_ft_h, TOKU
 //   (old_ft_h may be one of many handles to the dictionary.)
 //   txn that created the loader
 // Requires: 
-//   ydb_lock is held.
+//   multi operation lock is held.
 //   The brt is open.  (which implies there can be no zombies.)
 //   The new file must be a valid dictionary.
 //   The block size and flags in the new file must match the existing BRT.

ft/ft_node-serialize.c

@@ -67,17 +67,15 @@ static inline void do_toku_trace(const char *cp, int len) {
 static int num_cores = 0; // cache the number of cores for the parallelization
 static struct toku_thread_pool *ft_pool = NULL;
 
-int 
+void 
 toku_ft_serialize_layer_init(void) {
     num_cores = toku_os_get_number_active_processors();
     int r = toku_thread_pool_create(&ft_pool, num_cores); lazy_assert_zero(r);
-    return 0;
 }
 
-int 
+void
 toku_ft_serialize_layer_destroy(void) {
     toku_thread_pool_destroy(&ft_pool);
-    return 0;
 }
 
 enum {FILE_CHANGE_INCREMENT = (16<<20)};

ft/log-internal.h

@@ -172,6 +172,7 @@ 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;
 };
 
 static inline int

ft/tdb-recover.c

@@ -14,19 +14,14 @@
 
 static int recovery_main(int argc, const char *const argv[]);
 
-static void dummy(void) {}
-
 int
 main(int argc, const char *const argv[]) {
     {
-	int rr = toku_ft_layer_init(dummy, dummy);
+	int rr = toku_ft_layer_init();
 	assert(rr==0);
     }
     int r = recovery_main(argc, argv);
-    {
-	int rr = toku_ft_layer_destroy();
-	assert(rr==0);
-    }
+    toku_ft_layer_destroy();
     return r;
 }
 

ft/tests/test.h

@@ -234,16 +234,13 @@ default_parse_args (int argc, const char *argv[]) {
 
 int test_main(int argc, const char *argv[]);
 
-static void dummy(void) {}
-
 int
 main(int argc, const char *argv[]) {
     initialize_dummymsn();
-    int rinit = toku_ft_layer_init(dummy, dummy);
+    int rinit = toku_ft_layer_init();
     CKERR(rinit);
     int r = test_main(argc, argv);
-    int rdestroy = toku_ft_layer_destroy();
-    CKERR(rdestroy);
+    toku_ft_layer_destroy();
     return r;
 }
 

ft/txn.c

@@ -170,7 +170,8 @@ toku_txn_create_txn (
         .txnid64 = xid,
         .ancestor_txnid64 = (parent_tokutxn ? parent_tokutxn->ancestor_txnid64 : xid),
         .xids = xids,
-        .roll_info = roll_info
+        .roll_info = roll_info,
+        .num_pin = 0
     };
 
 

ft/txn_manager.c

@@ -27,6 +27,8 @@ struct txn_manager {
     time_t oldest_living_starttime;   // timestamp in seconds of when txn with oldest_living_xid started
     struct toku_list prepared_txns; // transactions that have been prepared and are unresolved, but have not been returned through txn_recover.
     struct toku_list prepared_and_returned_txns; // transactions that have been prepared and unresolved, and have been returned through txn_recover.  We need this list so that we can restart the recovery.
+
+    toku_cond_t wait_for_unpin_of_txn;
 };
 
 static TXN_MANAGER_STATUS_S txn_manager_status;
@@ -201,6 +203,8 @@ void toku_txn_manager_init(TXN_MANAGER* txn_managerp) {
     txn_manager->oldest_living_starttime = 0;
     toku_list_init(&txn_manager->prepared_txns);
     toku_list_init(&txn_manager->prepared_and_returned_txns);
+
+    toku_cond_init(&txn_manager->wait_for_unpin_of_txn, 0);
     *txn_managerp = txn_manager;
 }
 
@@ -210,6 +214,7 @@ void toku_txn_manager_destroy(TXN_MANAGER txn_manager) {
     toku_omt_destroy(&txn_manager->live_root_txns);
     toku_omt_destroy(&txn_manager->snapshot_txnids);
     toku_omt_destroy(&txn_manager->live_list_reverse);
+    toku_cond_destroy(&txn_manager->wait_for_unpin_of_txn);
     toku_free(txn_manager);
 }
 
@@ -692,6 +697,16 @@ void toku_txn_manager_note_abort_txn(TXN_MANAGER txn_manager, TOKUTXN txn) {
         invalidate_xa_xid(&txn->xa_xid);
         toku_list_remove(&txn->prepared_txns_link);
     }
+    // for hot indexing, if hot index is processing
+    // this transaction in some leafentry, then we cannot change
+    // the state to commit or abort until
+    // hot index is done with that leafentry
+    while (txn->num_pin > 0) {
+        toku_cond_wait(
+            &txn_manager->wait_for_unpin_of_txn, 
+            &txn_manager->txn_manager_lock
+            );
+    }
     txn->state = TOKUTXN_ABORTING;
     toku_mutex_unlock(&txn_manager->txn_manager_lock);
 }
@@ -702,6 +717,16 @@ void toku_txn_manager_note_commit_txn(TXN_MANAGER txn_manager, TOKUTXN txn) {
         invalidate_xa_xid(&txn->xa_xid);
         toku_list_remove(&txn->prepared_txns_link);
     }
+    // for hot indexing, if hot index is processing
+    // this transaction in some leafentry, then we cannot change
+    // the state to commit or abort until
+    // hot index is done with that leafentry
+    while (txn->num_pin > 0) {
+        toku_cond_wait(
+            &txn_manager->wait_for_unpin_of_txn, 
+            &txn_manager->txn_manager_lock
+            );
+    }
     txn->state = TOKUTXN_COMMITTING;
     toku_mutex_unlock(&txn_manager->txn_manager_lock);
 }
@@ -749,6 +774,20 @@ int toku_txn_manager_recover_txn (
 }
 
 // needed for hot indexing
+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++;
+}
+
+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);
+    txn->num_pin--;
+    if (txn->num_pin == 0) {
+        toku_cond_broadcast(&txn_manager->wait_for_unpin_of_txn);
+    }
+}
+
 void toku_txn_manager_suspend(TXN_MANAGER txn_manager) {
     toku_mutex_lock(&txn_manager->txn_manager_lock);    
 }

ft/txn_manager.h

@@ -78,6 +78,9 @@ int toku_txn_manager_recover_txn(
     u_int32_t flags
     );
 
+void toku_txn_manager_pin_live_txn_unlocked(TXN_MANAGER txn_manager, TOKUTXN txn);
+void toku_txn_manager_unpin_live_txn_unlocked(TXN_MANAGER txn_manager, TOKUTXN txn);
+
 void toku_txn_manager_suspend(TXN_MANAGER txn_manager);
 void toku_txn_manager_resume(TXN_MANAGER txn_manager);
 

portability/portability.c

@@ -47,10 +47,9 @@ toku_portability_init(void) {
     return r;
 }
 
-int
+void
 toku_portability_destroy(void) {
     toku_memory_shutdown();
-    return 0;
 }
 
 int

portability/tests/test.h

-../../windows/tests/test.h
\ No newline at end of file

portability/tests/test.h

+/* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+// vim: expandtab:ts=8:sw=4:softtabstop=4:
+#include <toku_portability.h>
+#include <toku_assert.h>
+
+#define CKERR(r) ({ int __r = r; if (__r!=0) fprintf(stderr, "%s:%d error %d %s\n", __FILE__, __LINE__, __r, strerror(r)); assert(__r==0); })
+#define CKERR2(r,r2) do { if (r!=r2) fprintf(stderr, "%s:%d error %d %s, expected %d\n", __FILE__, __LINE__, r, strerror(r), r2); assert(r==r2); } while (0)
+#define CKERR2s(r,r2,r3) do { if (r!=r2 && r!=r3) fprintf(stderr, "%s:%d error %d %s, expected %d or %d\n", __FILE__, __LINE__, r, strerror(r), r2,r3); assert(r==r2||r==r3); } while (0)
+
+#define DEBUG_LINE do { \
+    fprintf(stderr, "%s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__); \
+    fflush(stderr); \
+} while (0)
+
+int test_main(int argc, char *const argv[]);
+
+int
+main(int argc, char *const argv[]) {
+    int ri = toku_portability_init();
+    assert(ri==0);
+    int r = test_main(argc, argv);
+    toku_portability_destroy();
+    return r;
+}
+

src/elocks.c

@@ -93,7 +93,7 @@ toku_ydb_lock(void) {
     // Update status
     STATUS_VALUE(YDB_LOCK_TAKEN)++;
     if (new_num_waiters > STATUS_VALUE(YDB_MAX_WAITERS)) 
-	STATUS_VALUE(YDB_MAX_WAITERS) = new_num_waiters;
+        STATUS_VALUE(YDB_MAX_WAITERS) = new_num_waiters;
     STATUS_VALUE(YDB_TOTAL_TIME_SINCE_START) = now - ydb_big_lock.starttime;
 }
 
@@ -105,7 +105,7 @@ ydb_unlock_internal(unsigned long useconds) {
     tokutime_t time_held = now - ydb_big_lock.acquired_time;
     STATUS_VALUE(YDB_TOTAL_TIME_YDB_LOCK_HELD) += time_held;
     if (time_held > STATUS_VALUE(YDB_MAX_TIME_YDB_LOCK_HELD))
-	STATUS_VALUE(YDB_MAX_TIME_YDB_LOCK_HELD) = time_held;
+        STATUS_VALUE(YDB_MAX_TIME_YDB_LOCK_HELD) = time_held;
     STATUS_VALUE(YDB_TOTAL_TIME_SINCE_START) = now - ydb_big_lock.starttime;
 
     toku_mutex_unlock(&ydb_big_lock.lock);
@@ -113,7 +113,7 @@ ydb_unlock_internal(unsigned long useconds) {
     int new_num_waiters = __sync_add_and_fetch(&STATUS_VALUE(YDB_NUM_WAITERS_NOW), -1);
 
     if (new_num_waiters > 0 && useconds > 0) {
-	__sync_add_and_fetch(&STATUS_VALUE(YDB_TOTAL_SLEEP_TIME), useconds);
+        __sync_add_and_fetch(&STATUS_VALUE(YDB_TOTAL_SLEEP_TIME), useconds);
         usleep(useconds);
     }
 }

src/indexer-internal.h

@@ -12,6 +12,7 @@
 #define TOKU_INDEXER_INTERNAL_H
 
 #include <ft/txn_state.h>
+#include <toku_pthread.h>
 
 // the indexer_commit_keys is an ordered set of keys described by a DBT in the keys array.
 // the array is a resizeable array with max size "max_keys" and current size "current_keys".
@@ -24,7 +25,8 @@ struct indexer_commit_keys {
 
 struct __toku_indexer_internal {
     DB_ENV *env;
-    DB_TXN *txn;
+    DB_TXN *txn;    
+    toku_mutex_t indexer_lock;
     DB *src_db;
     int N;
     DB **dest_dbs; /* [N] */

src/indexer.c

@@ -113,7 +113,8 @@ disassociate_indexer_from_hot_dbs(DB_INDEXER *indexer) {
 
 static void 
 free_indexer_resources(DB_INDEXER *indexer) {
-    if ( indexer->i ) {
+    if ( indexer->i ) {        
+        toku_mutex_destroy(&indexer->i->indexer_lock);
         if ( indexer->i->lec )   { le_cursor_close(indexer->i->lec); }
         if ( indexer->i->fnums ) { 
             toku_free(indexer->i->fnums); 
@@ -135,6 +136,16 @@ free_indexer(DB_INDEXER *indexer) {
     }
 }
 
+void
+toku_indexer_lock(DB_INDEXER* indexer) {
+    toku_mutex_lock(&indexer->i->indexer_lock);
+}
+
+void
+toku_indexer_unlock(DB_INDEXER* indexer) {
+    toku_mutex_unlock(&indexer->i->indexer_lock);
+}
+
 int 
 toku_indexer_create_indexer(DB_ENV *env,
                             DB_TXN *txn,
@@ -180,6 +191,8 @@ toku_indexer_create_indexer(DB_ENV *env,
     indexer->close                 = close_indexer;
     indexer->abort                 = abort_indexer;
 
+    toku_mutex_init(&indexer->i->indexer_lock, NULL);
+
     //
     // create and close a dummy loader to get redirection going for the hot indexer
     // This way, if the hot index aborts, but other transactions have references to the
@@ -273,7 +286,7 @@ build_index(DB_INDEXER *indexer) {
     BOOL done = FALSE;
     for (uint64_t loop_count = 0; !done; loop_count++) {
 
-        toku_ydb_lock();
+        toku_indexer_lock(indexer);
 
         result = le_cursor_next(indexer->i->lec, &le);
         if (result != 0) {
@@ -295,10 +308,7 @@ build_index(DB_INDEXER *indexer) {
             toku_ule_free(ule);
         }
 
-        // if there is lock contention, then sleep for 1 millisecond after the unlock
-        // note: the value 1000 was empirically determined to provide good query performance
-        //         during hotindexing
-        toku_ydb_unlock_and_yield(1000); 
+        toku_indexer_unlock(indexer);
         
         if (result == 0) 
             result = maybe_call_poll_func(indexer, loop_count);

src/indexer.h

@@ -16,6 +16,12 @@ extern "C" {
 #endif
 
 
+// locking and unlocking functions to synchronize cursor position with
+// XXX_multiple APIs
+void toku_indexer_lock(DB_INDEXER* indexer);
+
+void toku_indexer_unlock(DB_INDEXER* indexer);
+
 // The indexer populates multiple destination db's from the contents of one source db.
 // While the indexes are being built by the indexer, the application may continue to 
 // change the contents of the source db.  The changes will be reflected into the destination

src/tests/hotindexer-bw.c

@@ -9,6 +9,8 @@
 #include <sys/stat.h>
 #include "key-val.h"
 
+toku_mutex_t put_lock;
+
 enum {NUM_INDEXER_INDEXES=1};
 static const int NUM_DBS = NUM_INDEXER_INDEXES + 1; // 1 for source DB
 static const int NUM_ROWS = 100000;
@@ -83,6 +85,7 @@ static void * client(void *arg)
         dbt_init(&val, &v, sizeof(v));
 
         while ( retry++ < 10 ) {
+            toku_mutex_lock(&put_lock);
             rr = env->put_multiple(env,
                                    cs->dbs[0],
                                    txn,
@@ -93,6 +96,7 @@ static void * client(void *arg)
                                    dest_keys,
                                    dest_vals, 
                                    cs->flags);
+            toku_mutex_unlock(&put_lock);
             if ( rr == 0 ) break;
             sleep(0);
         }
@@ -257,12 +261,14 @@ static void test_indexer(DB *src, DB **dbs)
     CKERR(r);
 
     if ( verbose ) printf("test_indexer create_indexer\n");
+    toku_mutex_lock(&put_lock);
     r = env->create_indexer(env, txn, &indexer, src, NUM_DBS-1, &dbs[1], db_flags, 0);
     CKERR(r);
     r = indexer->set_error_callback(indexer, NULL, NULL);
     CKERR(r);
     r = indexer->set_poll_function(indexer, poll_print, NULL);
     CKERR(r);
+    toku_mutex_unlock(&put_lock);
 
     // start threads doing additional inserts - no lock issues since indexer already created
     r = toku_pthread_create(&client_threads[0], 0, client, (void *)&client_specs[0]);  CKERR(r);
@@ -283,8 +289,10 @@ static void test_indexer(DB *src, DB **dbs)
     }
 
     if ( verbose ) printf("test_indexer close\n");
+    toku_mutex_lock(&put_lock);
     r = indexer->close(indexer);
     CKERR(r);
+    toku_mutex_unlock(&put_lock);
     r = txn->commit(txn, DB_TXN_SYNC);
     CKERR(r);
 
@@ -306,6 +314,7 @@ static void test_indexer(DB *src, DB **dbs)
 static void run_test(void) 
 {
     int r;
+    toku_mutex_init(&put_lock, NULL);
     r = system("rm -rf " ENVDIR);                                                CKERR(r);
     r = toku_os_mkdir(ENVDIR, S_IRWXU+S_IRWXG+S_IRWXO);                          CKERR(r);
     r = toku_os_mkdir(ENVDIR "/log", S_IRWXU+S_IRWXG+S_IRWXO);                   CKERR(r);
@@ -350,6 +359,7 @@ static void run_test(void)
     for(int i=0;i<NUM_DBS;i++) {
         r = dbs[i]->close(dbs[i], 0);                                            CKERR(r);
     }
+    toku_mutex_destroy(&put_lock);
     r = env->close(env, 0);                                                      CKERR(r);
 }
 

src/tests/test.h

@@ -426,8 +426,7 @@ main(int argc, char * const argv[])
     toku_os_initialize_settings(1);
     r = test_main(argc, argv);
 #if IS_TDB && TOKU_WINDOWS
-    int rdestroy = toku_ydb_destroy();
-    CKERR(rdestroy);
+    toku_ydb_destroy();
 #endif
     return r;
 }

src/ydb.c

@@ -193,22 +193,22 @@ int
 toku_ydb_init(void) {
     int r = 0;
     //Lower level must be initialized first.
-    if (r==0) 
-        r = toku_ft_layer_init(toku_ydb_lock, toku_ydb_unlock);
-    if (r==0) 
+    if (r==0) {
+        r = toku_ft_layer_init();
+    }
+    if (r==0) {
         toku_ydb_lock_init();
+    }
     return r;
 }
 
 // Do not clean up resources if env is panicked, just exit ugly
-int 
+void 
 toku_ydb_destroy(void) {
-    int r = 0;
     if (env_is_panicked == 0) {
         toku_ydb_lock_destroy();
-        r = toku_ft_layer_destroy();
+        toku_ft_layer_destroy();
     }
-    return r;
 }
 
 static int

src/ydb.h

@@ -14,7 +14,7 @@ extern "C" {
 int toku_ydb_init(void);
 
 // Called when the ydb library is unloaded.
-int toku_ydb_destroy(void);
+void toku_ydb_destroy(void);
 
 // db_env_create for the trace library
 int db_env_create_toku10(DB_ENV **, u_int32_t) __attribute__((__visibility__("default")));

src/ydb_lib.c

@@ -21,8 +21,7 @@ static void __attribute__((constructor)) libtokudb_init(void) {
 
 static void __attribute__((destructor)) libtokudb_destroy(void) {
     // printf("%s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);
-    int r = toku_ydb_destroy();
-    assert(r==0);
+    toku_ydb_destroy();
 }
 
 #endif
@@ -40,7 +39,7 @@ BOOL WINAPI DllMain(HINSTANCE h, DWORD reason, LPVOID reserved) {
         r = toku_ydb_init();
         break;
     case DLL_PROCESS_DETACH:
-        r = toku_ydb_destroy();
+        toku_ydb_destroy();
         break;
     case DLL_THREAD_ATTACH:
         //TODO: Any new thread code if necessary, i.e. allocate per-thread

src/ydb_write.c

@@ -374,6 +374,39 @@ do_del_multiple(DB_TXN *txn, uint32_t num_dbs, DB *db_array[], DBT keys[], DB *s
     return r;
 }
 
+//
+// if a hot index is in progress, gets the indexer
+// also verifies that there is at most one hot index
+// in progress. If it finds more than one, then returns EINVAL
+// 
+static int
+get_indexer_if_exists(
+    uint32_t num_dbs, 
+    DB **db_array, 
+    DB_INDEXER** indexerp
+    ) 
+{
+    int r = 0;
+    DB_INDEXER* first_indexer = NULL;
+    for (uint32_t i = 0; i < num_dbs; i++) {
+        DB_INDEXER* indexer = toku_db_get_indexer(db_array[i]);
+        if (indexer) {
+            if (!first_indexer) {
+                first_indexer = indexer;
+            }
+            else {
+                if (first_indexer != indexer) {
+                    r = EINVAL;
+                }
+            }
+        }
+    }
+    if (r == 0) {
+        *indexerp = first_indexer;
+    }
+    return r;
+}
+
 int
 env_del_multiple(
     DB_ENV *env, 
@@ -388,6 +421,7 @@ env_del_multiple(
 {
     int r;
     DBT del_keys[num_dbs];
+    DB_INDEXER* indexer = NULL;
 
     HANDLE_PANICKED_ENV(env);
 
@@ -401,6 +435,10 @@ env_del_multiple(
     }
 
     HANDLE_ILLEGAL_WORKING_PARENT_TXN(env, txn);
+    r = get_indexer_if_exists(num_dbs, db_array, &indexer);
+    if (r) {
+        goto cleanup;
+    }
 
     {
     uint32_t lock_flags[num_dbs];
@@ -442,7 +480,10 @@ env_del_multiple(
         brts[which_db] = db->i->ft_handle;
     }
 
-    toku_ydb_lock();
+    if (indexer) {
+        toku_indexer_lock(indexer);
+    }
+    toku_multi_operation_client_lock();
     if (num_dbs == 1) {
         r = log_del_single(txn, brts[0], &del_keys[0]);
     }
@@ -452,7 +493,10 @@ env_del_multiple(
     if (r == 0) 
         r = do_del_multiple(txn, num_dbs, db_array, del_keys, src_db, src_key);
     }
-    toku_ydb_unlock();
+    toku_multi_operation_client_unlock();
+    if (indexer) {
+        toku_indexer_unlock(indexer);
+    }
 
 cleanup:
     if (r == 0)
@@ -527,6 +571,7 @@ env_put_multiple_internal(
     int r;
     DBT put_keys[num_dbs];
     DBT put_vals[num_dbs];
+    DB_INDEXER* indexer = NULL;
 
     HANDLE_PANICKED_ENV(env);
 
@@ -544,6 +589,10 @@ env_put_multiple_internal(
     }
 
     HANDLE_ILLEGAL_WORKING_PARENT_TXN(env, txn);
+    r = get_indexer_if_exists(num_dbs, db_array, &indexer);
+    if (r) {
+        goto cleanup;
+    }
 
     for (uint32_t which_db = 0; which_db < num_dbs; which_db++) {
         DB *db = db_array[which_db];
@@ -587,7 +636,10 @@ env_put_multiple_internal(
         brts[which_db] = db->i->ft_handle;
     }
     
-    toku_ydb_lock();
+    if (indexer) {
+        toku_indexer_lock(indexer);
+    }
+    toku_multi_operation_client_lock();
     if (num_dbs == 1) {
         r = log_put_single(txn, brts[0], &put_keys[0], &put_vals[0]);
     }
@@ -597,7 +649,10 @@ env_put_multiple_internal(
     if (r == 0) {
         r = do_put_multiple(txn, num_dbs, db_array, put_keys, put_vals, src_db, src_key);
     }
-    toku_ydb_unlock();
+    toku_multi_operation_client_unlock();
+    if (indexer) {
+        toku_indexer_unlock(indexer);
+    }
 
 cleanup:
     if (r == 0)
@@ -617,6 +672,7 @@ env_update_multiple(DB_ENV *env, DB *src_db, DB_TXN *txn,
     int r = 0;
 
     HANDLE_PANICKED_ENV(env);
+    DB_INDEXER* indexer = NULL;
 
     if (!txn) {
         r = EINVAL;
@@ -628,6 +684,10 @@ env_update_multiple(DB_ENV *env, DB *src_db, DB_TXN *txn,
     }
 
     HANDLE_ILLEGAL_WORKING_PARENT_TXN(env, txn);
+    r = get_indexer_if_exists(num_dbs, db_array, &indexer);
+    if (r) {
+        goto cleanup;
+    }
 
     {
         uint32_t n_del_dbs = 0;
@@ -731,9 +791,10 @@ env_update_multiple(DB_ENV *env, DB *src_db, DB_TXN *txn,
                 n_put_dbs++;
             }
         }
-        // grab the ydb lock for the actual work that 
-        // depends on it
-        toku_ydb_lock();
+        if (indexer) {
+            toku_indexer_lock(indexer);
+        }
+        toku_multi_operation_client_lock();
         if (r == 0 && n_del_dbs > 0) {
             if (n_del_dbs == 1)
                 r = log_del_single(txn, del_fts[0], &del_keys[0]);
@@ -751,7 +812,10 @@ env_update_multiple(DB_ENV *env, DB *src_db, DB_TXN *txn,
             if (r == 0)
                 r = do_put_multiple(txn, n_put_dbs, put_dbs, put_keys, put_vals, src_db, new_src_key);
         }
-        toku_ydb_unlock();
+        toku_multi_operation_client_unlock();
+        if (indexer) {
+            toku_indexer_unlock(indexer);
+        }
     }
 
 cleanup:

toku_include/toku_portability.h

@@ -206,7 +206,7 @@ int toku_set_func_fclose(int (*)(FILE*));
 int toku_set_func_read(ssize_t (*)(int, void *, size_t));
 int toku_set_func_pread (ssize_t (*)(int, void *, size_t, off_t));
 int toku_portability_init    (void);
-int toku_portability_destroy (void);
+void toku_portability_destroy (void);
 
 #if defined(__cplusplus) || defined(__cilkplusplus)
 }