Merge pull request #407 from anydot/fixes

Fixes around time usage

src/aof.c

@@ -46,7 +46,7 @@ void stopAppendOnly(void) {
 /* Called when the user switches from "appendonly no" to "appendonly yes"
  * at runtime using the CONFIG command. */
 int startAppendOnly(void) {
-    server.aof_last_fsync = time(NULL);
+    server.aof_last_fsync = server.unixtime;
     server.aof_fd = open(server.aof_filename,O_WRONLY|O_APPEND|O_CREAT,0644);
     redisAssert(server.aof_state == REDIS_AOF_OFF);
     if (server.aof_fd == -1) {

src/db.c

@@ -10,28 +10,6 @@ void SlotToKeyDel(robj *key);
  * C-level DB API
  *----------------------------------------------------------------------------*/
 
-/* Important notes on lookup and disk store.
- *
- * When disk store is enabled on lookup we can have different cases.
- *
- * a) The key is in memory:
- *    - If the key is not in IO_SAVEINPROG state we can access it.
- *      As if it's just IO_SAVE this means we have the key in the IO queue
- *      but can't be accessed by the IO thread (it requires to be
- *      translated into an IO Job by the cache cron function.)
- *    - If the key is in IO_SAVEINPROG we can't touch the key and have
- *      to blocking wait completion of operations.
- * b) The key is not in memory:
- *    - If it's marked as non existing on disk as well (negative cache)
- *      we don't need to perform the disk access.
- *    - if the key MAY EXIST, but is not in memory, and it is marked as IO_SAVE
- *      then the key can only be a deleted one. As IO_SAVE keys are never
- *      evicted (dirty state), so the only possibility is that key was deleted.
- *    - if the key MAY EXIST we need to blocking load it.
- *      We check that the key is not in IO_SAVEINPROG state before accessing
- *      the disk object. If it is in this state, we wait.
- */
-
 robj *lookupKey(redisDb *db, robj *key) {
     dictEntry *de = dictFind(db->dict,key->ptr);
     if (de) {
@@ -161,8 +139,6 @@ int dbDelete(redisDb *db, robj *key) {
     }
 }
 
-/* Empty the whole database.
- * If diskstore is enabled this function will just flush the in-memory cache. */
 long long emptyDb() {
     int j;
     long long removed = 0;
@@ -518,7 +494,7 @@ int expireIfNeeded(redisDb *db, robj *key) {
      * that is, 0 if we think the key should be still valid, 1 if
      * we think the key is expired at this time. */
     if (server.masterhost != NULL) {
-        return time(NULL) > when;
+        return mstime() > when;
     }
 
     /* Return when this key has not expired */

src/networking.c

@@ -52,7 +52,7 @@ redisClient *createClient(int fd) {
     c->bulklen = -1;
     c->sentlen = 0;
     c->flags = 0;
-    c->ctime = c->lastinteraction = time(NULL);
+    c->ctime = c->lastinteraction = server.unixtime;
     c->authenticated = 0;
     c->replstate = REDIS_REPL_NONE;
     c->reply = listCreate();
@@ -604,7 +604,7 @@ void freeClient(redisClient *c) {
     if (c->flags & REDIS_MASTER) {
         server.master = NULL;
         server.repl_state = REDIS_REPL_CONNECT;
-        server.repl_down_since = time(NULL);
+        server.repl_down_since = server.unixtime;
         /* Since we lost the connection with the master, we should also
          * close the connection with all our slaves if we have any, so
          * when we'll resync with the master the other slaves will sync again
@@ -732,7 +732,7 @@ void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask) {
             return;
         }
     }
-    if (totwritten > 0) c->lastinteraction = time(NULL);
+    if (totwritten > 0) c->lastinteraction = server.unixtime;
     if (c->bufpos == 0 && listLength(c->reply) == 0) {
         c->sentlen = 0;
         aeDeleteFileEvent(server.el,c->fd,AE_WRITABLE);
@@ -1017,7 +1017,7 @@ void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask) {
     }
     if (nread) {
         sdsIncrLen(c->querybuf,nread);
-        c->lastinteraction = time(NULL);
+        c->lastinteraction = server.unixtime;
     } else {
         server.current_client = NULL;
         return;
@@ -1058,7 +1058,6 @@ void getClientsMaxBuffers(unsigned long *longest_output_list,
 sds getClientInfoString(redisClient *client) {
     char ip[32], flags[16], events[3], *p;
     int port;
-    time_t now = time(NULL);
     int emask;
 
     anetPeerToString(client->fd,ip,&port);
@@ -1087,8 +1086,8 @@ sds getClientInfoString(redisClient *client) {
     return sdscatprintf(sdsempty(),
         "addr=%s:%d fd=%d age=%ld idle=%ld flags=%s db=%d sub=%d psub=%d qbuf=%lu qbuf-free=%lu obl=%lu oll=%lu omem=%lu events=%s cmd=%s",
         ip,port,client->fd,
-        (long)(now - client->ctime),
+        (long)(server.unixtime - client->ctime),
-        (long)(now - client->lastinteraction),
+        (long)(server.unixtime - client->lastinteraction),
         flags,
         client->db->id,
         (int) dictSize(client->pubsub_channels),

src/object.c

@@ -270,9 +270,7 @@ robj *tryObjectEncoding(robj *o) {
 
     /* Ok, this object can be encoded...
      *
-     * Can I use a shared object? Only if the object is inside a given
+     * Can I use a shared object? Only if the object is inside a given range
-     * range and if the back end in use is in-memory. For disk store every
-     * object in memory used as value should be independent.
      *
      * Note that we also avoid using shared integers when maxmemory is used
      * because every object needs to have a private LRU field for the LRU

src/redis.c

@@ -612,7 +612,7 @@ void activeExpireCycle(void) {
 }
 
 void updateLRUClock(void) {
-    server.lruclock = (time(NULL)/REDIS_LRU_CLOCK_RESOLUTION) &
+    server.lruclock = (server.unixtime/REDIS_LRU_CLOCK_RESOLUTION) &
                                                 REDIS_LRU_CLOCK_MAX;
 }
 
@@ -821,15 +821,13 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
             updateDictResizePolicy();
         }
     } else {
-         time_t now = time(NULL);
-
         /* If there is not a background saving/rewrite in progress check if
          * we have to save/rewrite now */
          for (j = 0; j < server.saveparamslen; j++) {
             struct saveparam *sp = server.saveparams+j;
 
             if (server.dirty >= sp->changes &&
-                now-server.lastsave > sp->seconds) {
+                server.unixtime-server.lastsave > sp->seconds) {
                 redisLog(REDIS_NOTICE,"%d changes in %d seconds. Saving...",
                     sp->changes, sp->seconds);
                 rdbSaveBackground(server.rdb_filename);
@@ -1683,7 +1681,7 @@ void bytesToHuman(char *s, unsigned long long n) {
  * on memory corruption problems. */
 sds genRedisInfoString(char *section) {
     sds info = sdsempty();
-    time_t uptime = time(NULL)-server.stat_starttime;
+    time_t uptime = server.unixtime-server.stat_starttime;
     int j, numcommands;
     struct rusage self_ru, c_ru;
     unsigned long lol, bib;
@@ -1822,7 +1820,7 @@ sds genRedisInfoString(char *section) {
             perc = ((double)server.loading_loaded_bytes /
                    server.loading_total_bytes) * 100;
 
-            elapsed = time(NULL)-server.loading_start_time;
+            elapsed = server.unixtime-server.loading_start_time;
             if (elapsed == 0) {
                 eta = 1; /* A fake 1 second figure if we don't have
                             enough info */
@@ -1893,7 +1891,7 @@ sds genRedisInfoString(char *section) {
                 (server.repl_state == REDIS_REPL_CONNECTED) ?
                     "up" : "down",
                 server.master ?
-                ((int)(time(NULL)-server.master->lastinteraction)) : -1,
+                ((int)(server.unixtime-server.master->lastinteraction)) : -1,
                 server.repl_state == REDIS_REPL_TRANSFER
             );
 
@@ -1902,14 +1900,14 @@ sds genRedisInfoString(char *section) {
                     "master_sync_left_bytes:%ld\r\n"
                     "master_sync_last_io_seconds_ago:%d\r\n"
                     ,(long)server.repl_transfer_left,
-                    (int)(time(NULL)-server.repl_transfer_lastio)
+                    (int)(server.unixtime-server.repl_transfer_lastio)
                 );
             }
 
             if (server.repl_state != REDIS_REPL_CONNECTED) {
                 info = sdscatprintf(info,
                     "master_link_down_since_seconds:%ld\r\n",
-                    (long)time(NULL)-server.repl_down_since);
+                    (long)server.unixtime-server.repl_down_since);
             }
         }
         info = sdscatprintf(info,

src/redis.h

@@ -817,7 +817,7 @@ extern dictType zsetDictType;
 extern dictType clusterNodesDictType;
 extern dictType dbDictType;
 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
-dictType hashDictType;
+extern dictType hashDictType;
 
 /*-----------------------------------------------------------------------------
  * Functions prototypes

src/replication.c

@@ -307,7 +307,7 @@ void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
             /* At this stage just a newline works as a PING in order to take
              * the connection live. So we refresh our last interaction
              * timestamp. */
-            server.repl_transfer_lastio = time(NULL);
+            server.repl_transfer_lastio = server.unixtime;
             return;
         } else if (buf[0] != '$') {
             redisLog(REDIS_WARNING,"Bad protocol from MASTER, the first byte is not '$', are you sure the host and port are right?");
@@ -330,7 +330,7 @@ void readSyncBulkPayload(aeEventLoop *el, int fd, void *privdata, int mask) {
         replicationAbortSyncTransfer();
         return;
     }
-    server.repl_transfer_lastio = time(NULL);
+    server.repl_transfer_lastio = server.unixtime;
     if (write(server.repl_transfer_fd,buf,nread) != nread) {
         redisLog(REDIS_WARNING,"Write error or short write writing to the DB dump file needed for MASTER <-> SLAVE synchrnonization: %s", strerror(errno));
         goto error;
@@ -441,7 +441,7 @@ void syncWithMaster(aeEventLoop *el, int fd, void *privdata, int mask) {
     /* Prepare a suitable temp file for bulk transfer */
     while(maxtries--) {
         snprintf(tmpfile,256,
-            "temp-%d.%ld.rdb",(int)time(NULL),(long int)getpid());
+            "temp-%d.%ld.rdb",(int)server.unixtime,(long int)getpid());
         dfd = open(tmpfile,O_CREAT|O_WRONLY|O_EXCL,0644);
         if (dfd != -1) break;
         sleep(1);
@@ -462,7 +462,7 @@ void syncWithMaster(aeEventLoop *el, int fd, void *privdata, int mask) {
     server.repl_state = REDIS_REPL_TRANSFER;
     server.repl_transfer_left = -1;
     server.repl_transfer_fd = dfd;
-    server.repl_transfer_lastio = time(NULL);
+    server.repl_transfer_lastio = server.unixtime;
     server.repl_transfer_tmpfile = zstrdup(tmpfile);
     return;
 
@@ -490,7 +490,7 @@ int connectWithMaster(void) {
         return REDIS_ERR;
     }
 
-    server.repl_transfer_lastio = time(NULL);
+    server.repl_transfer_lastio = server.unixtime;
     server.repl_transfer_s = fd;
     server.repl_state = REDIS_REPL_CONNECTING;
     return REDIS_OK;

src/t_list.c

@@ -910,7 +910,7 @@ int getTimeoutFromObjectOrReply(redisClient *c, robj *object, time_t *timeout) {
         return REDIS_ERR;
     }
 
-    if (tval > 0) tval += time(NULL);
+    if (tval > 0) tval += server.unixtime;
     *timeout = tval;
 
     return REDIS_OK;