First implementation of the slow log feature

[redis.git] / src / object.c

diff --git a/src/object.c b/src/object.c
index c384d6004522af47a2fbf5055f7522434994344c..ce13429af94df159cf51307d721f8da52e152550 100644 (file)
--- a/src/object.c
+++ b/src/object.c
@@ -1,5 +1,4 @@
 #include "redis.h"
-#include <pthread.h>
 #include <math.h>
 
 robj *createObject(int type, void *ptr) {
@@ -30,9 +29,7 @@ robj *createStringObject(char *ptr, size_t len) {
 
 robj *createStringObjectFromLongLong(long long value) {
     robj *o;
-    if (value >= 0 && value < REDIS_SHARED_INTEGERS &&
-        !server.ds_enabled &&
-        pthread_equal(pthread_self(),server.mainthread)) {
+    if (value >= 0 && value < REDIS_SHARED_INTEGERS) {
         incrRefCount(shared.integers[value]);
         o = shared.integers[value];
     } else {
@@ -93,9 +90,13 @@ robj *createHashObject(void) {
 
 robj *createZsetObject(void) {
     zset *zs = zmalloc(sizeof(*zs));
+    robj *o;
+
     zs->dict = dictCreate(&zsetDictType,NULL);
     zs->zsl = zslCreate();
-    return createObject(REDIS_ZSET,zs);
+    o = createObject(REDIS_ZSET,zs);
+    o->encoding = REDIS_ENCODING_SKIPLIST;
+    return o;
 }
 
 robj *createZsetZiplistObject(void) {
@@ -140,7 +141,7 @@ void freeSetObject(robj *o) {
 void freeZsetObject(robj *o) {
     zset *zs;
     switch (o->encoding) {
-    case REDIS_ENCODING_RAW:
+    case REDIS_ENCODING_SKIPLIST:
         zs = o->ptr;
         dictRelease(zs->dict);
         zslFree(zs->zsl);
@@ -176,7 +177,7 @@ void decrRefCount(void *obj) {
     robj *o = obj;
 
     if (o->refcount <= 0) redisPanic("decrRefCount against refcount <= 0");
-    if (--(o->refcount) == 0) {
+    if (o->refcount == 1) {
         switch(o->type) {
         case REDIS_STRING: freeStringObject(o); break;
         case REDIS_LIST: freeListObject(o); break;
@@ -185,8 +186,9 @@ void decrRefCount(void *obj) {
         case REDIS_HASH: freeHashObject(o); break;
         default: redisPanic("Unknown object type"); break;
         }
-        o->ptr = NULL; /* defensive programming. We'll see NULL in traces. */
         zfree(o);
+    } else {
+        o->refcount--;
     }
 }
 
@@ -198,6 +200,16 @@ int checkType(redisClient *c, robj *o, int type) {
     return 0;
 }
 
+int isObjectRepresentableAsLongLong(robj *o, long long *llval) {
+    redisAssert(o->type == REDIS_STRING);
+    if (o->encoding == REDIS_ENCODING_INT) {
+        if (llval) *llval = (long) o->ptr;
+        return REDIS_OK;
+    } else {
+        return string2ll(o->ptr,sdslen(o->ptr),llval) ? REDIS_OK : REDIS_ERR;
+    }
+}
+
 /* Try to encode a string object in order to save space */
 robj *tryObjectEncoding(robj *o) {
     long value;
@@ -215,7 +227,7 @@ robj *tryObjectEncoding(robj *o) {
     redisAssert(o->type == REDIS_STRING);
 
     /* Check if we can represent this string as a long integer */
-    if (isStringRepresentableAsLong(s,&value) == REDIS_ERR) return o;
+    if (!string2l(s,sdslen(s),&value)) return o;
 
     /* Ok, this object can be encoded...
      *
@@ -226,10 +238,7 @@ robj *tryObjectEncoding(robj *o) {
      * 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
      * algorithm to work well. */
-    if (!server.ds_enabled &&
-        server.maxmemory == 0 && value >= 0 && value < REDIS_SHARED_INTEGERS &&
-        pthread_equal(pthread_self(),server.mainthread))
-    {
+    if (server.maxmemory == 0 && value >= 0 && value < REDIS_SHARED_INTEGERS) {
         decrRefCount(o);
         incrRefCount(shared.integers[value]);
         return shared.integers[value];
@@ -417,6 +426,7 @@ char *strEncoding(int encoding) {
     case REDIS_ENCODING_LINKEDLIST: return "linkedlist";
     case REDIS_ENCODING_ZIPLIST: return "ziplist";
     case REDIS_ENCODING_INTSET: return "intset";
+    case REDIS_ENCODING_SKIPLIST: return "skiplist";
     default: return "unknown";
     }
 }
@@ -431,3 +441,42 @@ unsigned long estimateObjectIdleTime(robj *o) {
                     REDIS_LRU_CLOCK_RESOLUTION;
     }
 }
+
+/* This is an helper function for the DEBUG command. We need to lookup keys
+ * without any modification of LRU or other parameters. */
+robj *objectCommandLookup(redisClient *c, robj *key) {
+    dictEntry *de;
+
+    if ((de = dictFind(c->db->dict,key->ptr)) == NULL) return NULL;
+    return (robj*) dictGetEntryVal(de);
+}
+
+robj *objectCommandLookupOrReply(redisClient *c, robj *key, robj *reply) {
+    robj *o = objectCommandLookup(c,key);
+
+    if (!o) addReply(c, reply);
+    return o;
+}
+
+/* Object command allows to inspect the internals of an Redis Object.
+ * Usage: OBJECT <verb> ... arguments ... */
+void objectCommand(redisClient *c) {
+    robj *o;
+
+    if (!strcasecmp(c->argv[1]->ptr,"refcount") && c->argc == 3) {
+        if ((o = objectCommandLookupOrReply(c,c->argv[2],shared.nullbulk))
+                == NULL) return;
+        addReplyLongLong(c,o->refcount);
+    } else if (!strcasecmp(c->argv[1]->ptr,"encoding") && c->argc == 3) {
+        if ((o = objectCommandLookupOrReply(c,c->argv[2],shared.nullbulk))
+                == NULL) return;
+        addReplyBulkCString(c,strEncoding(o->encoding));
+    } else if (!strcasecmp(c->argv[1]->ptr,"idletime") && c->argc == 3) {
+        if ((o = objectCommandLookupOrReply(c,c->argv[2],shared.nullbulk))
+                == NULL) return;
+        addReplyLongLong(c,estimateObjectIdleTime(o));
+    } else {
+        addReplyError(c,"Syntax error. Try OBJECT (refcount|encoding|idletime)");
+    }
+}
+