* 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) {
/* Update the access time for the aging algorithm.
* Don't do it if we have a saving child, as this will trigger
* a copy on write madness. */
- if (server.bgsavechildpid == -1 && server.bgrewritechildpid == -1)
+ if (server.rdb_child_pid == -1 && server.aof_child_pid == -1)
val->lru = server.lruclock;
- server.stat_keyspace_hits++;
return val;
} else {
- server.stat_keyspace_misses++;
return NULL;
}
}
robj *lookupKeyRead(redisDb *db, robj *key) {
+ robj *val;
+
expireIfNeeded(db,key);
- return lookupKey(db,key);
+ val = lookupKey(db,key);
+ if (val == NULL)
+ server.stat_keyspace_misses++;
+ else
+ server.stat_keyspace_hits++;
+ return val;
}
robj *lookupKeyWrite(redisDb *db, robj *key) {
}
incrRefCount(val);
removeExpire(db,key);
- touchWatchedKey(db,key);
+ signalModifiedKey(db,key);
}
int dbExists(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;
signalFlushedDb(-1);
server.dirty += emptyDb();
addReply(c,shared.ok);
- if (server.bgsavechildpid != -1) {
- kill(server.bgsavechildpid,SIGKILL);
- rdbRemoveTempFile(server.bgsavechildpid);
+ if (server.rdb_child_pid != -1) {
+ kill(server.rdb_child_pid,SIGKILL);
+ rdbRemoveTempFile(server.rdb_child_pid);
}
if (server.saveparamslen > 0) {
/* Normally rdbSave() will reset dirty, but we don't want this here
* as otherwise FLUSHALL will not be replicated nor put into the AOF. */
int saved_dirty = server.dirty;
- rdbSave(server.dbfilename);
+ rdbSave(server.rdb_filename);
server.dirty = saved_dirty;
}
server.dirty++;
}
void shutdownCommand(redisClient *c) {
- if (prepareForShutdown() == REDIS_OK)
- exit(0);
+ int flags = 0;
+
+ if (c->argc > 2) {
+ addReply(c,shared.syntaxerr);
+ return;
+ } else if (c->argc == 2) {
+ if (!strcasecmp(c->argv[1]->ptr,"nosave")) {
+ flags |= REDIS_SHUTDOWN_NOSAVE;
+ } else if (!strcasecmp(c->argv[1]->ptr,"save")) {
+ flags |= REDIS_SHUTDOWN_SAVE;
+ } else {
+ addReply(c,shared.syntaxerr);
+ return;
+ }
+ }
+ if (prepareForShutdown(flags) == REDIS_OK) exit(0);
addReplyError(c,"Errors trying to SHUTDOWN. Check logs.");
}
void propagateExpire(redisDb *db, robj *key) {
robj *argv[2];
- argv[0] = createStringObject("DEL",3);
+ argv[0] = shared.del;
argv[1] = key;
- incrRefCount(key);
+ incrRefCount(argv[0]);
+ incrRefCount(argv[1]);
- if (server.appendonly)
+ if (server.aof_state != REDIS_AOF_OFF)
feedAppendOnlyFile(server.delCommand,db->id,argv,2);
if (listLength(server.slaves))
replicationFeedSlaves(server.slaves,db->id,argv,2);
* 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 */
return tolower(arg[0]) == 'm' && tolower(arg[1]) == 's' && arg[2] == '\0';
}
-void expireGenericCommand(redisClient *c, long long offset) {
+void expireGenericCommand(redisClient *c, long long offset, int unit) {
dictEntry *de;
robj *key = c->argv[1], *param = c->argv[2];
long long milliseconds;
- int time_in_seconds = 1;
if (getLongLongFromObjectOrReply(c, param, &milliseconds, NULL) != REDIS_OK)
return;
- /* If no "ms" argument was passed the time is in second, so we need
- * to multilpy it by 1000 */
- if (c->argc == 4) {
- if (!stringObjectEqualsMs(c->argv[3])) {
- addReply(c,shared.syntaxerr);
- return;
- }
- time_in_seconds = 0; /* "ms" argument passed. */
- }
- if (time_in_seconds) milliseconds *= 1000;
+ if (unit == UNIT_SECONDS) milliseconds *= 1000;
milliseconds -= offset;
de = dictFind(c->db->dict,key->ptr);
}
void expireCommand(redisClient *c) {
- if (c->argc > 4) {
- addReply(c,shared.syntaxerr);
- return;
- }
- expireGenericCommand(c,0);
+ expireGenericCommand(c,0,UNIT_SECONDS);
}
void expireatCommand(redisClient *c) {
- if (c->argc > 4) {
- addReply(c,shared.syntaxerr);
- return;
- }
- expireGenericCommand(c,mstime());
+ expireGenericCommand(c,mstime(),UNIT_SECONDS);
}
-void ttlCommand(redisClient *c) {
- long long expire, ttl = -1;
- int output_ms = 0;
+void pexpireCommand(redisClient *c) {
+ expireGenericCommand(c,0,UNIT_MILLISECONDS);
+}
- if (c->argc == 3) {
- if (stringObjectEqualsMs(c->argv[2])) {
- output_ms = 1;
- } else {
- addReply(c,shared.syntaxerr);
- return;
- }
- }
+void pexpireatCommand(redisClient *c) {
+ expireGenericCommand(c,mstime(),UNIT_MILLISECONDS);
+}
+
+void ttlGenericCommand(redisClient *c, int output_ms) {
+ long long expire, ttl = -1;
expire = getExpire(c->db,c->argv[1]);
if (expire != -1) {
}
}
+void ttlCommand(redisClient *c) {
+ ttlGenericCommand(c, 0);
+}
+
+void pttlCommand(redisClient *c) {
+ ttlGenericCommand(c, 1);
+}
+
void persistCommand(redisClient *c) {
dictEntry *de;
projects / redis.git / blobdiff