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[redis.git] / src / redis.h
1 #ifndef __REDIS_H
2 #define __REDIS_H
3
4 #include "fmacros.h"
5 #include "config.h"
6
7 #if defined(__sun)
8 #include "solarisfixes.h"
9 #endif
10
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <time.h>
15 #include <limits.h>
16 #include <unistd.h>
17 #include <errno.h>
18 #include <inttypes.h>
19 #include <pthread.h>
20 #include <syslog.h>
21 #include <netinet/in.h>
22 #include <lua.h>
23
24 #include "ae.h" /* Event driven programming library */
25 #include "sds.h" /* Dynamic safe strings */
26 #include "dict.h" /* Hash tables */
27 #include "adlist.h" /* Linked lists */
28 #include "zmalloc.h" /* total memory usage aware version of malloc/free */
29 #include "anet.h" /* Networking the easy way */
30 #include "zipmap.h" /* Compact string -> string data structure */
31 #include "ziplist.h" /* Compact list data structure */
32 #include "intset.h" /* Compact integer set structure */
33 #include "version.h"
34 #include "util.h"
35
36 /* Error codes */
37 #define REDIS_OK 0
38 #define REDIS_ERR -1
39
40 /* Static server configuration */
41 #define REDIS_SERVERPORT 6379 /* TCP port */
42 #define REDIS_MAXIDLETIME (60*5) /* default client timeout */
43 #define REDIS_IOBUF_LEN 1024
44 #define REDIS_LOADBUF_LEN 1024
45 #define REDIS_STATIC_ARGS 8
46 #define REDIS_DEFAULT_DBNUM 16
47 #define REDIS_CONFIGLINE_MAX 1024
48 #define REDIS_MAX_SYNC_TIME 60 /* Slave can't take more to sync */
49 #define REDIS_EXPIRELOOKUPS_PER_CRON 10 /* lookup 10 expires per loop */
50 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
51 #define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
52 #define REDIS_SHARED_INTEGERS 10000
53 #define REDIS_REPLY_CHUNK_BYTES (5*1500) /* 5 TCP packets with default MTU */
54 #define REDIS_MAX_LOGMSG_LEN 1024 /* Default maximum length of syslog messages */
55
56 /* Hash table parameters */
57 #define REDIS_HT_MINFILL 10 /* Minimal hash table fill 10% */
58
59 /* Command flags:
60 * REDIS_CMD_DENYOOM:
61 * Commands marked with this flag will return an error when 'maxmemory' is
62 * set and the server is using more than 'maxmemory' bytes of memory.
63 * In short: commands with this flag are denied on low memory conditions.
64 * REDIS_CMD_FORCE_REPLICATION:
65 * Force replication even if dirty is 0. */
66 #define REDIS_CMD_DENYOOM 4
67 #define REDIS_CMD_FORCE_REPLICATION 8
68
69 /* Object types */
70 #define REDIS_STRING 0
71 #define REDIS_LIST 1
72 #define REDIS_SET 2
73 #define REDIS_ZSET 3
74 #define REDIS_HASH 4
75 #define REDIS_VMPOINTER 8
76
77 /* Object types only used for persistence in .rdb files */
78 #define REDIS_HASH_ZIPMAP 9
79 #define REDIS_LIST_ZIPLIST 10
80 #define REDIS_SET_INTSET 11
81 #define REDIS_ZSET_ZIPLIST 12
82
83 /* Objects encoding. Some kind of objects like Strings and Hashes can be
84 * internally represented in multiple ways. The 'encoding' field of the object
85 * is set to one of this fields for this object. */
86 #define REDIS_ENCODING_RAW 0 /* Raw representation */
87 #define REDIS_ENCODING_INT 1 /* Encoded as integer */
88 #define REDIS_ENCODING_HT 2 /* Encoded as hash table */
89 #define REDIS_ENCODING_ZIPMAP 3 /* Encoded as zipmap */
90 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
91 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
92 #define REDIS_ENCODING_INTSET 6 /* Encoded as intset */
93 #define REDIS_ENCODING_SKIPLIST 7 /* Encoded as skiplist */
94
95 /* Object types only used for dumping to disk */
96 #define REDIS_EXPIRETIME 253
97 #define REDIS_SELECTDB 254
98 #define REDIS_EOF 255
99
100 /* Defines related to the dump file format. To store 32 bits lengths for short
101 * keys requires a lot of space, so we check the most significant 2 bits of
102 * the first byte to interpreter the length:
103 *
104 * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
105 * 01|000000 00000000 => 01, the len is 14 byes, 6 bits + 8 bits of next byte
106 * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
107 * 11|000000 this means: specially encoded object will follow. The six bits
108 * number specify the kind of object that follows.
109 * See the REDIS_RDB_ENC_* defines.
110 *
111 * Lenghts up to 63 are stored using a single byte, most DB keys, and may
112 * values, will fit inside. */
113 #define REDIS_RDB_6BITLEN 0
114 #define REDIS_RDB_14BITLEN 1
115 #define REDIS_RDB_32BITLEN 2
116 #define REDIS_RDB_ENCVAL 3
117 #define REDIS_RDB_LENERR UINT_MAX
118
119 /* When a length of a string object stored on disk has the first two bits
120 * set, the remaining two bits specify a special encoding for the object
121 * accordingly to the following defines: */
122 #define REDIS_RDB_ENC_INT8 0 /* 8 bit signed integer */
123 #define REDIS_RDB_ENC_INT16 1 /* 16 bit signed integer */
124 #define REDIS_RDB_ENC_INT32 2 /* 32 bit signed integer */
125 #define REDIS_RDB_ENC_LZF 3 /* string compressed with FASTLZ */
126
127 /* Scheduled IO opeations flags. */
128 #define REDIS_IO_LOAD 1
129 #define REDIS_IO_SAVE 2
130 #define REDIS_IO_LOADINPROG 4
131 #define REDIS_IO_SAVEINPROG 8
132
133 /* Generic IO flags */
134 #define REDIS_IO_ONLYLOADS 1
135 #define REDIS_IO_ASAP 2
136
137 #define REDIS_MAX_COMPLETED_JOBS_PROCESSED 1
138 #define REDIS_THREAD_STACK_SIZE (1024*1024*4)
139
140 /* Client flags */
141 #define REDIS_SLAVE 1 /* This client is a slave server */
142 #define REDIS_MASTER 2 /* This client is a master server */
143 #define REDIS_MONITOR 4 /* This client is a slave monitor, see MONITOR */
144 #define REDIS_MULTI 8 /* This client is in a MULTI context */
145 #define REDIS_BLOCKED 16 /* The client is waiting in a blocking operation */
146 #define REDIS_IO_WAIT 32 /* The client is waiting for Virtual Memory I/O */
147 #define REDIS_DIRTY_CAS 64 /* Watched keys modified. EXEC will fail. */
148 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
149 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
150 server.unblocked_clients */
151 #define REDIS_LUA_CLIENT 512 /* This is a non connected client used by Lua */
152
153 /* Client request types */
154 #define REDIS_REQ_INLINE 1
155 #define REDIS_REQ_MULTIBULK 2
156
157 /* Slave replication state - slave side */
158 #define REDIS_REPL_NONE 0 /* No active replication */
159 #define REDIS_REPL_CONNECT 1 /* Must connect to master */
160 #define REDIS_REPL_TRANSFER 2 /* Receiving .rdb from master */
161 #define REDIS_REPL_CONNECTED 3 /* Connected to master */
162
163 /* Slave replication state - from the point of view of master
164 * Note that in SEND_BULK and ONLINE state the slave receives new updates
165 * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
166 * to start the next background saving in order to send updates to it. */
167 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
168 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
169 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
170 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
171
172 /* List related stuff */
173 #define REDIS_HEAD 0
174 #define REDIS_TAIL 1
175
176 /* Sort operations */
177 #define REDIS_SORT_GET 0
178 #define REDIS_SORT_ASC 1
179 #define REDIS_SORT_DESC 2
180 #define REDIS_SORTKEY_MAX 1024
181
182 /* Log levels */
183 #define REDIS_DEBUG 0
184 #define REDIS_VERBOSE 1
185 #define REDIS_NOTICE 2
186 #define REDIS_WARNING 3
187 #define REDIS_LOG_RAW (1<<10) /* Modifier to log without timestamp */
188
189 /* Anti-warning macro... */
190 #define REDIS_NOTUSED(V) ((void) V)
191
192 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
193 #define ZSKIPLIST_P 0.25 /* Skiplist P = 1/4 */
194
195 /* Append only defines */
196 #define APPENDFSYNC_NO 0
197 #define APPENDFSYNC_ALWAYS 1
198 #define APPENDFSYNC_EVERYSEC 2
199
200 /* Zip structure related defaults */
201 #define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
202 #define REDIS_HASH_MAX_ZIPMAP_VALUE 64
203 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
204 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
205 #define REDIS_SET_MAX_INTSET_ENTRIES 512
206 #define REDIS_ZSET_MAX_ZIPLIST_ENTRIES 128
207 #define REDIS_ZSET_MAX_ZIPLIST_VALUE 64
208
209 /* Sets operations codes */
210 #define REDIS_OP_UNION 0
211 #define REDIS_OP_DIFF 1
212 #define REDIS_OP_INTER 2
213
214 /* Redis maxmemory strategies */
215 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
216 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
217 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
218 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
219 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
220 #define REDIS_MAXMEMORY_NO_EVICTION 5
221
222 /* Diskstore background saving thread states */
223 #define REDIS_BGSAVE_THREAD_UNACTIVE 0
224 #define REDIS_BGSAVE_THREAD_ACTIVE 1
225 #define REDIS_BGSAVE_THREAD_DONE_OK 2
226 #define REDIS_BGSAVE_THREAD_DONE_ERR 3
227
228 /* Scripting */
229 #define REDIS_LUA_TIME_LIMIT 60000 /* milliseconds */
230
231 /* We can print the stacktrace, so our assert is defined this way: */
232 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
233 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
234 void _redisAssert(char *estr, char *file, int line);
235 void _redisPanic(char *msg, char *file, int line);
236
237 /*-----------------------------------------------------------------------------
238 * Data types
239 *----------------------------------------------------------------------------*/
240
241 /* A redis object, that is a type able to hold a string / list / set */
242
243 /* The actual Redis Object */
244 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
245 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
246 typedef struct redisObject {
247 unsigned type:4;
248 unsigned notused:2; /* Not used */
249 unsigned encoding:4;
250 unsigned lru:22; /* lru time (relative to server.lruclock) */
251 int refcount;
252 void *ptr;
253 /* VM fields are only allocated if VM is active, otherwise the
254 * object allocation function will just allocate
255 * sizeof(redisObjct) minus sizeof(redisObjectVM), so using
256 * Redis without VM active will not have any overhead. */
257 } robj;
258
259 /* The VM pointer structure - identifies an object in the swap file.
260 *
261 * This object is stored in place of the value
262 * object in the main key->value hash table representing a database.
263 * Note that the first fields (type, storage) are the same as the redisObject
264 * structure so that vmPointer strucuters can be accessed even when casted
265 * as redisObject structures.
266 *
267 * This is useful as we don't know if a value object is or not on disk, but we
268 * are always able to read obj->storage to check this. For vmPointer
269 * structures "type" is set to REDIS_VMPOINTER (even if without this field
270 * is still possible to check the kind of object from the value of 'storage').*/
271 typedef struct vmPointer {
272 unsigned type:4;
273 unsigned storage:2; /* REDIS_VM_SWAPPED or REDIS_VM_LOADING */
274 unsigned notused:26;
275 unsigned int vtype; /* type of the object stored in the swap file */
276 off_t page; /* the page at witch the object is stored on disk */
277 off_t usedpages; /* number of pages used on disk */
278 } vmpointer;
279
280 /* Macro used to initalize a Redis object allocated on the stack.
281 * Note that this macro is taken near the structure definition to make sure
282 * we'll update it when the structure is changed, to avoid bugs like
283 * bug #85 introduced exactly in this way. */
284 #define initStaticStringObject(_var,_ptr) do { \
285 _var.refcount = 1; \
286 _var.type = REDIS_STRING; \
287 _var.encoding = REDIS_ENCODING_RAW; \
288 _var.ptr = _ptr; \
289 } while(0);
290
291 typedef struct redisDb {
292 dict *dict; /* The keyspace for this DB */
293 dict *expires; /* Timeout of keys with a timeout set */
294 dict *blocking_keys; /* Keys with clients waiting for data (BLPOP) */
295 dict *io_keys; /* Keys with clients waiting for DS I/O */
296 dict *io_negcache; /* Negative caching for disk store */
297 dict *io_queued; /* Queued IO operations hash table */
298 dict *watched_keys; /* WATCHED keys for MULTI/EXEC CAS */
299 int id;
300 } redisDb;
301
302 /* Client MULTI/EXEC state */
303 typedef struct multiCmd {
304 robj **argv;
305 int argc;
306 struct redisCommand *cmd;
307 } multiCmd;
308
309 typedef struct multiState {
310 multiCmd *commands; /* Array of MULTI commands */
311 int count; /* Total number of MULTI commands */
312 } multiState;
313
314 typedef struct blockingState {
315 robj **keys; /* The key we are waiting to terminate a blocking
316 * operation such as BLPOP. Otherwise NULL. */
317 int count; /* Number of blocking keys */
318 time_t timeout; /* Blocking operation timeout. If UNIX current time
319 * is >= timeout then the operation timed out. */
320 robj *target; /* The key that should receive the element,
321 * for BRPOPLPUSH. */
322 } blockingState;
323
324 /* With multiplexing we need to take per-clinet state.
325 * Clients are taken in a liked list. */
326 typedef struct redisClient {
327 int fd;
328 redisDb *db;
329 int dictid;
330 sds querybuf;
331 int argc;
332 robj **argv;
333 int reqtype;
334 int multibulklen; /* number of multi bulk arguments left to read */
335 long bulklen; /* length of bulk argument in multi bulk request */
336 list *reply;
337 int sentlen;
338 time_t lastinteraction; /* time of the last interaction, used for timeout */
339 int flags; /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
340 int slaveseldb; /* slave selected db, if this client is a slave */
341 int authenticated; /* when requirepass is non-NULL */
342 int replstate; /* replication state if this is a slave */
343 int repldbfd; /* replication DB file descriptor */
344 long repldboff; /* replication DB file offset */
345 off_t repldbsize; /* replication DB file size */
346 multiState mstate; /* MULTI/EXEC state */
347 blockingState bpop; /* blocking state */
348 list *io_keys; /* Keys this client is waiting to be loaded from the
349 * swap file in order to continue. */
350 list *watched_keys; /* Keys WATCHED for MULTI/EXEC CAS */
351 dict *pubsub_channels; /* channels a client is interested in (SUBSCRIBE) */
352 list *pubsub_patterns; /* patterns a client is interested in (SUBSCRIBE) */
353
354 /* Response buffer */
355 int bufpos;
356 char buf[REDIS_REPLY_CHUNK_BYTES];
357 } redisClient;
358
359 struct saveparam {
360 time_t seconds;
361 int changes;
362 };
363
364 struct sharedObjectsStruct {
365 robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
366 *colon, *nullbulk, *nullmultibulk, *queued,
367 *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
368 *outofrangeerr, *loadingerr, *plus,
369 *select0, *select1, *select2, *select3, *select4,
370 *select5, *select6, *select7, *select8, *select9,
371 *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
372 *mbulk4, *psubscribebulk, *punsubscribebulk,
373 *integers[REDIS_SHARED_INTEGERS];
374 };
375
376 /* ZSETs use a specialized version of Skiplists */
377 typedef struct zskiplistNode {
378 robj *obj;
379 double score;
380 struct zskiplistNode *backward;
381 struct zskiplistLevel {
382 struct zskiplistNode *forward;
383 unsigned int span;
384 } level[];
385 } zskiplistNode;
386
387 typedef struct zskiplist {
388 struct zskiplistNode *header, *tail;
389 unsigned long length;
390 int level;
391 } zskiplist;
392
393 typedef struct zset {
394 dict *dict;
395 zskiplist *zsl;
396 } zset;
397
398 /*-----------------------------------------------------------------------------
399 * Redis cluster data structures
400 *----------------------------------------------------------------------------*/
401
402 #define REDIS_CLUSTER_SLOTS 4096
403 #define REDIS_CLUSTER_OK 0 /* Everything looks ok */
404 #define REDIS_CLUSTER_FAIL 1 /* The cluster can't work */
405 #define REDIS_CLUSTER_NEEDHELP 2 /* The cluster works, but needs some help */
406 #define REDIS_CLUSTER_NAMELEN 40 /* sha1 hex length */
407 #define REDIS_CLUSTER_PORT_INCR 10000 /* Cluster port = baseport + PORT_INCR */
408
409 struct clusterNode;
410
411 /* clusterLink encapsulates everything needed to talk with a remote node. */
412 typedef struct clusterLink {
413 int fd; /* TCP socket file descriptor */
414 sds sndbuf; /* Packet send buffer */
415 sds rcvbuf; /* Packet reception buffer */
416 struct clusterNode *node; /* Node related to this link if any, or NULL */
417 } clusterLink;
418
419 /* Node flags */
420 #define REDIS_NODE_MASTER 1 /* The node is a master */
421 #define REDIS_NODE_SLAVE 2 /* The node is a slave */
422 #define REDIS_NODE_PFAIL 4 /* Failure? Need acknowledge */
423 #define REDIS_NODE_FAIL 8 /* The node is believed to be malfunctioning */
424 #define REDIS_NODE_MYSELF 16 /* This node is myself */
425 #define REDIS_NODE_HANDSHAKE 32 /* We have still to exchange the first ping */
426 #define REDIS_NODE_NOADDR 64 /* We don't know the address of this node */
427 #define REDIS_NODE_MEET 128 /* Send a MEET message to this node */
428 #define REDIS_NODE_NULL_NAME "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
429
430 struct clusterNode {
431 char name[REDIS_CLUSTER_NAMELEN]; /* Node name, hex string, sha1-size */
432 int flags; /* REDIS_NODE_... */
433 unsigned char slots[REDIS_CLUSTER_SLOTS/8]; /* slots handled by this node */
434 int numslaves; /* Number of slave nodes, if this is a master */
435 struct clusterNode **slaves; /* pointers to slave nodes */
436 struct clusterNode *slaveof; /* pointer to the master node */
437 time_t ping_sent; /* Unix time we sent latest ping */
438 time_t pong_received; /* Unix time we received the pong */
439 char *configdigest; /* Configuration digest of this node */
440 time_t configdigest_ts; /* Configuration digest timestamp */
441 char ip[16]; /* Latest known IP address of this node */
442 int port; /* Latest known port of this node */
443 clusterLink *link; /* TCP/IP link with this node */
444 };
445 typedef struct clusterNode clusterNode;
446
447 typedef struct {
448 char *configfile;
449 clusterNode *myself; /* This node */
450 int state; /* REDIS_CLUSTER_OK, REDIS_CLUSTER_FAIL, ... */
451 int node_timeout;
452 dict *nodes; /* Hash table of name -> clusterNode structures */
453 clusterNode *migrating_slots_to[REDIS_CLUSTER_SLOTS];
454 clusterNode *importing_slots_from[REDIS_CLUSTER_SLOTS];
455 clusterNode *slots[REDIS_CLUSTER_SLOTS];
456 zskiplist *slots_to_keys;
457 } clusterState;
458
459 /* Redis cluster messages header */
460
461 /* Note that the PING, PONG and MEET messages are actually the same exact
462 * kind of packet. PONG is the reply to ping, in the extact format as a PING,
463 * while MEET is a special PING that forces the receiver to add the sender
464 * as a node (if it is not already in the list). */
465 #define CLUSTERMSG_TYPE_PING 0 /* Ping */
466 #define CLUSTERMSG_TYPE_PONG 1 /* Pong (reply to Ping) */
467 #define CLUSTERMSG_TYPE_MEET 2 /* Meet "let's join" message */
468 #define CLUSTERMSG_TYPE_FAIL 3 /* Mark node xxx as failing */
469
470 /* Initially we don't know our "name", but we'll find it once we connect
471 * to the first node, using the getsockname() function. Then we'll use this
472 * address for all the next messages. */
473 typedef struct {
474 char nodename[REDIS_CLUSTER_NAMELEN];
475 uint32_t ping_sent;
476 uint32_t pong_received;
477 char ip[16]; /* IP address last time it was seen */
478 uint16_t port; /* port last time it was seen */
479 uint16_t flags;
480 uint32_t notused; /* for 64 bit alignment */
481 } clusterMsgDataGossip;
482
483 typedef struct {
484 char nodename[REDIS_CLUSTER_NAMELEN];
485 } clusterMsgDataFail;
486
487 union clusterMsgData {
488 /* PING, MEET and PONG */
489 struct {
490 /* Array of N clusterMsgDataGossip structures */
491 clusterMsgDataGossip gossip[1];
492 } ping;
493 /* FAIL */
494 struct {
495 clusterMsgDataFail about;
496 } fail;
497 };
498
499 typedef struct {
500 uint32_t totlen; /* Total length of this message */
501 uint16_t type; /* Message type */
502 uint16_t count; /* Only used for some kind of messages. */
503 char sender[REDIS_CLUSTER_NAMELEN]; /* Name of the sender node */
504 unsigned char myslots[REDIS_CLUSTER_SLOTS/8];
505 char slaveof[REDIS_CLUSTER_NAMELEN];
506 char configdigest[32];
507 uint16_t port; /* Sender TCP base port */
508 unsigned char state; /* Cluster state from the POV of the sender */
509 unsigned char notused[5]; /* Reserved for future use. For alignment. */
510 union clusterMsgData data;
511 } clusterMsg;
512
513 /*-----------------------------------------------------------------------------
514 * Global server state
515 *----------------------------------------------------------------------------*/
516
517 struct redisServer {
518 /* General */
519 pthread_t mainthread;
520 redisDb *db;
521 dict *commands; /* Command table hahs table */
522 aeEventLoop *el;
523 /* Networking */
524 int port;
525 char *bindaddr;
526 char *unixsocket;
527 int ipfd;
528 int sofd;
529 int cfd;
530 list *clients;
531 list *slaves, *monitors;
532 char neterr[ANET_ERR_LEN];
533 /* RDB / AOF loading information */
534 int loading;
535 off_t loading_total_bytes;
536 off_t loading_loaded_bytes;
537 time_t loading_start_time;
538 /* Fast pointers to often looked up command */
539 struct redisCommand *delCommand, *multiCommand;
540 int cronloops; /* number of times the cron function run */
541 time_t lastsave; /* Unix time of last save succeeede */
542 /* Fields used only for stats */
543 time_t stat_starttime; /* server start time */
544 long long stat_numcommands; /* number of processed commands */
545 long long stat_numconnections; /* number of connections received */
546 long long stat_expiredkeys; /* number of expired keys */
547 long long stat_evictedkeys; /* number of evicted keys (maxmemory) */
548 long long stat_keyspace_hits; /* number of successful lookups of keys */
549 long long stat_keyspace_misses; /* number of failed lookups of keys */
550 size_t stat_peak_memory; /* max used memory record */
551 /* Configuration */
552 int verbosity;
553 int maxidletime;
554 int dbnum;
555 int daemonize;
556 int appendonly;
557 int appendfsync;
558 int no_appendfsync_on_rewrite;
559 int shutdown_asap;
560 int activerehashing;
561 char *requirepass;
562 /* Persistence */
563 long long dirty; /* changes to DB from the last save */
564 long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */
565 time_t lastfsync;
566 int appendfd;
567 int appendseldb;
568 char *pidfile;
569 pid_t bgsavechildpid;
570 pid_t bgrewritechildpid;
571 int bgsavethread_state;
572 pthread_mutex_t bgsavethread_mutex;
573 pthread_t bgsavethread;
574 sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
575 sds aofbuf; /* AOF buffer, written before entering the event loop */
576 struct saveparam *saveparams;
577 int saveparamslen;
578 char *dbfilename;
579 int rdbcompression;
580 char *appendfilename;
581 /* Logging */
582 char *logfile;
583 int syslog_enabled;
584 char *syslog_ident;
585 int syslog_facility;
586 /* Replication related */
587 int isslave;
588 /* Slave specific fields */
589 char *masterauth;
590 char *masterhost;
591 int masterport;
592 redisClient *master; /* client that is master for this slave */
593 int replstate; /* replication status if the instance is a slave */
594 off_t repl_transfer_left; /* bytes left reading .rdb */
595 int repl_transfer_s; /* slave -> master SYNC socket */
596 int repl_transfer_fd; /* slave -> master SYNC temp file descriptor */
597 char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */
598 time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */
599 int repl_serve_stale_data; /* Serve stale data when link is down? */
600 /* Limits */
601 unsigned int maxclients;
602 unsigned long long maxmemory;
603 int maxmemory_policy;
604 int maxmemory_samples;
605 /* Blocked clients */
606 unsigned int bpop_blocked_clients;
607 unsigned int cache_blocked_clients;
608 list *unblocked_clients; /* list of clients to unblock before next loop */
609 list *cache_io_queue; /* IO operations queue */
610 int cache_flush_delay; /* seconds to wait before flushing keys */
611 /* Sort parameters - qsort_r() is only available under BSD so we
612 * have to take this state global, in order to pass it to sortCompare() */
613 int sort_desc;
614 int sort_alpha;
615 int sort_bypattern;
616 /* Virtual memory configuration */
617 int ds_enabled; /* backend disk in redis.conf */
618 char *ds_path; /* location of the disk store on disk */
619 unsigned long long cache_max_memory;
620 /* Zip structure config */
621 size_t hash_max_zipmap_entries;
622 size_t hash_max_zipmap_value;
623 size_t list_max_ziplist_entries;
624 size_t list_max_ziplist_value;
625 size_t set_max_intset_entries;
626 size_t zset_max_ziplist_entries;
627 size_t zset_max_ziplist_value;
628 time_t unixtime; /* Unix time sampled every second. */
629 /* Virtual memory I/O threads stuff */
630 /* An I/O thread process an element taken from the io_jobs queue and
631 * put the result of the operation in the io_done list. While the
632 * job is being processed, it's put on io_processing queue. */
633 list *io_newjobs; /* List of VM I/O jobs yet to be processed */
634 list *io_processing; /* List of VM I/O jobs being processed */
635 list *io_processed; /* List of VM I/O jobs already processed */
636 list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
637 pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */
638 pthread_cond_t io_condvar; /* I/O threads conditional variable */
639 pthread_attr_t io_threads_attr; /* attributes for threads creation */
640 int io_active_threads; /* Number of running I/O threads */
641 int vm_max_threads; /* Max number of I/O threads running at the same time */
642 /* Our main thread is blocked on the event loop, locking for sockets ready
643 * to be read or written, so when a threaded I/O operation is ready to be
644 * processed by the main thread, the I/O thread will use a unix pipe to
645 * awake the main thread. The followings are the two pipe FDs. */
646 int io_ready_pipe_read;
647 int io_ready_pipe_write;
648 /* Virtual memory stats */
649 unsigned long long vm_stats_used_pages;
650 unsigned long long vm_stats_swapped_objects;
651 unsigned long long vm_stats_swapouts;
652 unsigned long long vm_stats_swapins;
653 /* Pubsub */
654 dict *pubsub_channels; /* Map channels to list of subscribed clients */
655 list *pubsub_patterns; /* A list of pubsub_patterns */
656 /* Misc */
657 unsigned lruclock:22; /* clock incrementing every minute, for LRU */
658 unsigned lruclock_padding:10;
659 /* Cluster */
660 int cluster_enabled;
661 clusterState cluster;
662 /* Scripting */
663 lua_State *lua;
664 redisClient *lua_client;
665 long long lua_time_limit;
666 long long lua_time_start;
667 };
668
669 typedef struct pubsubPattern {
670 redisClient *client;
671 robj *pattern;
672 } pubsubPattern;
673
674 typedef void redisCommandProc(redisClient *c);
675 typedef int *redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
676 struct redisCommand {
677 char *name;
678 redisCommandProc *proc;
679 int arity;
680 int flags;
681 /* Use a function to determine keys arguments in a command line.
682 * Used both for diskstore preloading and Redis Cluster. */
683 redisGetKeysProc *getkeys_proc;
684 /* What keys should be loaded in background when calling this command? */
685 int firstkey; /* The first argument that's a key (0 = no keys) */
686 int lastkey; /* THe last argument that's a key */
687 int keystep; /* The step between first and last key */
688 long long microseconds, calls;
689 };
690
691 struct redisFunctionSym {
692 char *name;
693 unsigned long pointer;
694 };
695
696 typedef struct _redisSortObject {
697 robj *obj;
698 union {
699 double score;
700 robj *cmpobj;
701 } u;
702 } redisSortObject;
703
704 typedef struct _redisSortOperation {
705 int type;
706 robj *pattern;
707 } redisSortOperation;
708
709 /* DIsk store threaded I/O request message */
710 #define REDIS_IOJOB_LOAD 0
711 #define REDIS_IOJOB_SAVE 1
712
713 typedef struct iojob {
714 int type; /* Request type, REDIS_IOJOB_* */
715 redisDb *db;/* Redis database */
716 robj *key; /* This I/O request is about this key */
717 robj *val; /* the value to swap for REDIS_IOJOB_SAVE, otherwise this
718 * field is populated by the I/O thread for REDIS_IOJOB_LOAD. */
719 time_t expire; /* Expire time for this key on REDIS_IOJOB_LOAD */
720 } iojob;
721
722 /* IO operations scheduled -- check dscache.c for more info */
723 typedef struct ioop {
724 int type;
725 redisDb *db;
726 robj *key;
727 time_t ctime; /* This is the creation time of the entry. */
728 } ioop;
729
730 /* Structure to hold list iteration abstraction. */
731 typedef struct {
732 robj *subject;
733 unsigned char encoding;
734 unsigned char direction; /* Iteration direction */
735 unsigned char *zi;
736 listNode *ln;
737 } listTypeIterator;
738
739 /* Structure for an entry while iterating over a list. */
740 typedef struct {
741 listTypeIterator *li;
742 unsigned char *zi; /* Entry in ziplist */
743 listNode *ln; /* Entry in linked list */
744 } listTypeEntry;
745
746 /* Structure to hold set iteration abstraction. */
747 typedef struct {
748 robj *subject;
749 int encoding;
750 int ii; /* intset iterator */
751 dictIterator *di;
752 } setTypeIterator;
753
754 /* Structure to hold hash iteration abstration. Note that iteration over
755 * hashes involves both fields and values. Because it is possible that
756 * not both are required, store pointers in the iterator to avoid
757 * unnecessary memory allocation for fields/values. */
758 typedef struct {
759 int encoding;
760 unsigned char *zi;
761 unsigned char *zk, *zv;
762 unsigned int zklen, zvlen;
763
764 dictIterator *di;
765 dictEntry *de;
766 } hashTypeIterator;
767
768 #define REDIS_HASH_KEY 1
769 #define REDIS_HASH_VALUE 2
770
771 /*-----------------------------------------------------------------------------
772 * Extern declarations
773 *----------------------------------------------------------------------------*/
774
775 extern struct redisServer server;
776 extern struct sharedObjectsStruct shared;
777 extern dictType setDictType;
778 extern dictType zsetDictType;
779 extern dictType clusterNodesDictType;
780 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
781 dictType hashDictType;
782
783 /*-----------------------------------------------------------------------------
784 * Functions prototypes
785 *----------------------------------------------------------------------------*/
786
787 /* Utils */
788 long long ustime(void);
789
790 /* networking.c -- Networking and Client related operations */
791 redisClient *createClient(int fd);
792 void closeTimedoutClients(void);
793 void freeClient(redisClient *c);
794 void resetClient(redisClient *c);
795 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
796 void addReply(redisClient *c, robj *obj);
797 void *addDeferredMultiBulkLength(redisClient *c);
798 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
799 void addReplySds(redisClient *c, sds s);
800 void processInputBuffer(redisClient *c);
801 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
802 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
803 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
804 void addReplyBulk(redisClient *c, robj *obj);
805 void addReplyBulkCString(redisClient *c, char *s);
806 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
807 void addReplyBulkLongLong(redisClient *c, long long ll);
808 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
809 void addReply(redisClient *c, robj *obj);
810 void addReplySds(redisClient *c, sds s);
811 void addReplyError(redisClient *c, char *err);
812 void addReplyStatus(redisClient *c, char *status);
813 void addReplyDouble(redisClient *c, double d);
814 void addReplyLongLong(redisClient *c, long long ll);
815 void addReplyMultiBulkLen(redisClient *c, long length);
816 void *dupClientReplyValue(void *o);
817 void getClientsMaxBuffers(unsigned long *longest_output_list,
818 unsigned long *biggest_input_buffer);
819
820 #ifdef __GNUC__
821 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
822 __attribute__((format(printf, 2, 3)));
823 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
824 __attribute__((format(printf, 2, 3)));
825 #else
826 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
827 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
828 #endif
829
830 /* List data type */
831 void listTypeTryConversion(robj *subject, robj *value);
832 void listTypePush(robj *subject, robj *value, int where);
833 robj *listTypePop(robj *subject, int where);
834 unsigned long listTypeLength(robj *subject);
835 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
836 void listTypeReleaseIterator(listTypeIterator *li);
837 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
838 robj *listTypeGet(listTypeEntry *entry);
839 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
840 int listTypeEqual(listTypeEntry *entry, robj *o);
841 void listTypeDelete(listTypeEntry *entry);
842 void listTypeConvert(robj *subject, int enc);
843 void unblockClientWaitingData(redisClient *c);
844 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
845 void popGenericCommand(redisClient *c, int where);
846
847 /* MULTI/EXEC/WATCH... */
848 void unwatchAllKeys(redisClient *c);
849 void initClientMultiState(redisClient *c);
850 void freeClientMultiState(redisClient *c);
851 void queueMultiCommand(redisClient *c, struct redisCommand *cmd);
852 void touchWatchedKey(redisDb *db, robj *key);
853 void touchWatchedKeysOnFlush(int dbid);
854
855 /* Redis object implementation */
856 void decrRefCount(void *o);
857 void incrRefCount(robj *o);
858 void freeStringObject(robj *o);
859 void freeListObject(robj *o);
860 void freeSetObject(robj *o);
861 void freeZsetObject(robj *o);
862 void freeHashObject(robj *o);
863 robj *createObject(int type, void *ptr);
864 robj *createStringObject(char *ptr, size_t len);
865 robj *dupStringObject(robj *o);
866 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
867 robj *tryObjectEncoding(robj *o);
868 robj *getDecodedObject(robj *o);
869 size_t stringObjectLen(robj *o);
870 robj *createStringObjectFromLongLong(long long value);
871 robj *createListObject(void);
872 robj *createZiplistObject(void);
873 robj *createSetObject(void);
874 robj *createIntsetObject(void);
875 robj *createHashObject(void);
876 robj *createZsetObject(void);
877 robj *createZsetZiplistObject(void);
878 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
879 int checkType(redisClient *c, robj *o, int type);
880 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
881 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
882 int getLongLongFromObject(robj *o, long long *target);
883 char *strEncoding(int encoding);
884 int compareStringObjects(robj *a, robj *b);
885 int equalStringObjects(robj *a, robj *b);
886 unsigned long estimateObjectIdleTime(robj *o);
887
888 /* Synchronous I/O with timeout */
889 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
890 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
891 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
892 int fwriteBulkString(FILE *fp, char *s, unsigned long len);
893 int fwriteBulkDouble(FILE *fp, double d);
894 int fwriteBulkLongLong(FILE *fp, long long l);
895 int fwriteBulkObject(FILE *fp, robj *obj);
896 int fwriteBulkCount(FILE *fp, char prefix, int count);
897
898 /* Replication */
899 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
900 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
901 int syncWithMaster(void);
902 void updateSlavesWaitingBgsave(int bgsaveerr);
903 void replicationCron(void);
904
905 /* Generic persistence functions */
906 void startLoading(FILE *fp);
907 void loadingProgress(off_t pos);
908 void stopLoading(void);
909
910 /* RDB persistence */
911 int rdbLoad(char *filename);
912 int rdbSaveBackground(char *filename);
913 void rdbRemoveTempFile(pid_t childpid);
914 int rdbSave(char *filename);
915 int rdbSaveObject(FILE *fp, robj *o);
916 off_t rdbSavedObjectLen(robj *o);
917 off_t rdbSavedObjectPages(robj *o);
918 robj *rdbLoadObject(int type, FILE *fp);
919 void backgroundSaveDoneHandler(int exitcode, int bysignal);
920 int rdbSaveKeyValuePair(FILE *fp, robj *key, robj *val, time_t expireitme, time_t now);
921 int rdbLoadType(FILE *fp);
922 time_t rdbLoadTime(FILE *fp);
923 robj *rdbLoadStringObject(FILE *fp);
924 int rdbSaveType(FILE *fp, unsigned char type);
925 int rdbSaveLen(FILE *fp, uint32_t len);
926
927 /* AOF persistence */
928 void flushAppendOnlyFile(void);
929 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
930 void aofRemoveTempFile(pid_t childpid);
931 int rewriteAppendOnlyFileBackground(void);
932 int loadAppendOnlyFile(char *filename);
933 void stopAppendOnly(void);
934 int startAppendOnly(void);
935 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
936
937 /* Sorted sets data type */
938
939 /* Struct to hold a inclusive/exclusive range spec. */
940 typedef struct {
941 double min, max;
942 int minex, maxex; /* are min or max exclusive? */
943 } zrangespec;
944
945 zskiplist *zslCreate(void);
946 void zslFree(zskiplist *zsl);
947 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
948 unsigned char *zzlInsert(unsigned char *zl, robj *ele, double score);
949 int zslDelete(zskiplist *zsl, double score, robj *obj);
950 zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec range);
951 double zzlGetScore(unsigned char *sptr);
952 void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
953 void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
954 unsigned int zsetLength(robj *zobj);
955 void zsetConvert(robj *zobj, int encoding);
956
957 /* Core functions */
958 void freeMemoryIfNeeded(void);
959 int processCommand(redisClient *c);
960 void setupSignalHandlers(void);
961 struct redisCommand *lookupCommand(sds name);
962 struct redisCommand *lookupCommandByCString(char *s);
963 void call(redisClient *c, struct redisCommand *cmd);
964 int prepareForShutdown();
965 void redisLog(int level, const char *fmt, ...);
966 void usage();
967 void updateDictResizePolicy(void);
968 int htNeedsResize(dict *dict);
969 void oom(const char *msg);
970 void populateCommandTable(void);
971 void resetCommandTableStats(void);
972
973 /* Disk store */
974 int dsOpen(void);
975 int dsClose(void);
976 int dsSet(redisDb *db, robj *key, robj *val, time_t expire);
977 robj *dsGet(redisDb *db, robj *key, time_t *expire);
978 int dsDel(redisDb *db, robj *key);
979 int dsExists(redisDb *db, robj *key);
980 void dsFlushDb(int dbid);
981 int dsRdbSaveBackground(char *filename);
982 int dsRdbSave(char *filename);
983
984 /* Disk Store Cache */
985 void dsInit(void);
986 void vmThreadedIOCompletedJob(aeEventLoop *el, int fd, void *privdata, int mask);
987 void lockThreadedIO(void);
988 void unlockThreadedIO(void);
989 void freeIOJob(iojob *j);
990 void queueIOJob(iojob *j);
991 void waitEmptyIOJobsQueue(void);
992 void processAllPendingIOJobs(void);
993 int blockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd);
994 int dontWaitForSwappedKey(redisClient *c, robj *key);
995 void handleClientsBlockedOnSwappedKey(redisDb *db, robj *key);
996 int cacheFreeOneEntry(void);
997 void cacheScheduleIOAddFlag(redisDb *db, robj *key, long flag);
998 void cacheScheduleIODelFlag(redisDb *db, robj *key, long flag);
999 int cacheScheduleIOGetFlags(redisDb *db, robj *key);
1000 void cacheScheduleIO(redisDb *db, robj *key, int type);
1001 void cacheCron(void);
1002 int cacheKeyMayExist(redisDb *db, robj *key);
1003 void cacheSetKeyMayExist(redisDb *db, robj *key);
1004 void cacheSetKeyDoesNotExist(redisDb *db, robj *key);
1005 void cacheForcePointInTime(void);
1006
1007 /* Set data type */
1008 robj *setTypeCreate(robj *value);
1009 int setTypeAdd(robj *subject, robj *value);
1010 int setTypeRemove(robj *subject, robj *value);
1011 int setTypeIsMember(robj *subject, robj *value);
1012 setTypeIterator *setTypeInitIterator(robj *subject);
1013 void setTypeReleaseIterator(setTypeIterator *si);
1014 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
1015 robj *setTypeNextObject(setTypeIterator *si);
1016 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
1017 unsigned long setTypeSize(robj *subject);
1018 void setTypeConvert(robj *subject, int enc);
1019
1020 /* Hash data type */
1021 void convertToRealHash(robj *o);
1022 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
1023 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
1024 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
1025 robj *hashTypeGetObject(robj *o, robj *key);
1026 int hashTypeExists(robj *o, robj *key);
1027 int hashTypeSet(robj *o, robj *key, robj *value);
1028 int hashTypeDelete(robj *o, robj *key);
1029 unsigned long hashTypeLength(robj *o);
1030 hashTypeIterator *hashTypeInitIterator(robj *subject);
1031 void hashTypeReleaseIterator(hashTypeIterator *hi);
1032 int hashTypeNext(hashTypeIterator *hi);
1033 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
1034 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
1035 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
1036
1037 /* Pub / Sub */
1038 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
1039 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
1040 void freePubsubPattern(void *p);
1041 int listMatchPubsubPattern(void *a, void *b);
1042
1043 /* Configuration */
1044 void loadServerConfig(char *filename);
1045 void appendServerSaveParams(time_t seconds, int changes);
1046 void resetServerSaveParams();
1047
1048 /* db.c -- Keyspace access API */
1049 int removeExpire(redisDb *db, robj *key);
1050 void propagateExpire(redisDb *db, robj *key);
1051 int expireIfNeeded(redisDb *db, robj *key);
1052 time_t getExpire(redisDb *db, robj *key);
1053 void setExpire(redisDb *db, robj *key, time_t when);
1054 robj *lookupKey(redisDb *db, robj *key);
1055 robj *lookupKeyRead(redisDb *db, robj *key);
1056 robj *lookupKeyWrite(redisDb *db, robj *key);
1057 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
1058 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
1059 int dbAdd(redisDb *db, robj *key, robj *val);
1060 int dbReplace(redisDb *db, robj *key, robj *val);
1061 int dbExists(redisDb *db, robj *key);
1062 robj *dbRandomKey(redisDb *db);
1063 int dbDelete(redisDb *db, robj *key);
1064 long long emptyDb();
1065 int selectDb(redisClient *c, int id);
1066 void signalModifiedKey(redisDb *db, robj *key);
1067 void signalFlushedDb(int dbid);
1068 unsigned int GetKeysInSlot(unsigned int hashslot, robj **keys, unsigned int count);
1069
1070 /* API to get key arguments from commands */
1071 #define REDIS_GETKEYS_ALL 0
1072 #define REDIS_GETKEYS_PRELOAD 1
1073 int *getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, int *numkeys, int flags);
1074 void getKeysFreeResult(int *result);
1075 int *noPreloadGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1076 int *renameGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1077 int *zunionInterGetKeys(struct redisCommand *cmd,robj **argv, int argc, int *numkeys, int flags);
1078
1079 /* Cluster */
1080 void clusterInit(void);
1081 unsigned short crc16(const char *buf, int len);
1082 unsigned int keyHashSlot(char *key, int keylen);
1083 clusterNode *createClusterNode(char *nodename, int flags);
1084 int clusterAddNode(clusterNode *node);
1085 void clusterCron(void);
1086 clusterNode *getNodeByQuery(redisClient *c, struct redisCommand *cmd, robj **argv, int argc, int *hashslot, int *ask);
1087
1088 /* Scripting */
1089 void scriptingInit(void);
1090
1091 /* Git SHA1 */
1092 char *redisGitSHA1(void);
1093 char *redisGitDirty(void);
1094
1095 /* Commands prototypes */
1096 void authCommand(redisClient *c);
1097 void pingCommand(redisClient *c);
1098 void echoCommand(redisClient *c);
1099 void setCommand(redisClient *c);
1100 void setnxCommand(redisClient *c);
1101 void setexCommand(redisClient *c);
1102 void getCommand(redisClient *c);
1103 void delCommand(redisClient *c);
1104 void existsCommand(redisClient *c);
1105 void setbitCommand(redisClient *c);
1106 void getbitCommand(redisClient *c);
1107 void setrangeCommand(redisClient *c);
1108 void getrangeCommand(redisClient *c);
1109 void incrCommand(redisClient *c);
1110 void decrCommand(redisClient *c);
1111 void incrbyCommand(redisClient *c);
1112 void decrbyCommand(redisClient *c);
1113 void selectCommand(redisClient *c);
1114 void randomkeyCommand(redisClient *c);
1115 void keysCommand(redisClient *c);
1116 void dbsizeCommand(redisClient *c);
1117 void lastsaveCommand(redisClient *c);
1118 void saveCommand(redisClient *c);
1119 void bgsaveCommand(redisClient *c);
1120 void bgrewriteaofCommand(redisClient *c);
1121 void shutdownCommand(redisClient *c);
1122 void moveCommand(redisClient *c);
1123 void renameCommand(redisClient *c);
1124 void renamenxCommand(redisClient *c);
1125 void lpushCommand(redisClient *c);
1126 void rpushCommand(redisClient *c);
1127 void lpushxCommand(redisClient *c);
1128 void rpushxCommand(redisClient *c);
1129 void linsertCommand(redisClient *c);
1130 void lpopCommand(redisClient *c);
1131 void rpopCommand(redisClient *c);
1132 void llenCommand(redisClient *c);
1133 void lindexCommand(redisClient *c);
1134 void lrangeCommand(redisClient *c);
1135 void ltrimCommand(redisClient *c);
1136 void typeCommand(redisClient *c);
1137 void lsetCommand(redisClient *c);
1138 void saddCommand(redisClient *c);
1139 void sremCommand(redisClient *c);
1140 void smoveCommand(redisClient *c);
1141 void sismemberCommand(redisClient *c);
1142 void scardCommand(redisClient *c);
1143 void spopCommand(redisClient *c);
1144 void srandmemberCommand(redisClient *c);
1145 void sinterCommand(redisClient *c);
1146 void sinterstoreCommand(redisClient *c);
1147 void sunionCommand(redisClient *c);
1148 void sunionstoreCommand(redisClient *c);
1149 void sdiffCommand(redisClient *c);
1150 void sdiffstoreCommand(redisClient *c);
1151 void syncCommand(redisClient *c);
1152 void flushdbCommand(redisClient *c);
1153 void flushallCommand(redisClient *c);
1154 void sortCommand(redisClient *c);
1155 void lremCommand(redisClient *c);
1156 void rpoplpushCommand(redisClient *c);
1157 void infoCommand(redisClient *c);
1158 void mgetCommand(redisClient *c);
1159 void monitorCommand(redisClient *c);
1160 void expireCommand(redisClient *c);
1161 void expireatCommand(redisClient *c);
1162 void getsetCommand(redisClient *c);
1163 void ttlCommand(redisClient *c);
1164 void persistCommand(redisClient *c);
1165 void slaveofCommand(redisClient *c);
1166 void debugCommand(redisClient *c);
1167 void msetCommand(redisClient *c);
1168 void msetnxCommand(redisClient *c);
1169 void zaddCommand(redisClient *c);
1170 void zincrbyCommand(redisClient *c);
1171 void zrangeCommand(redisClient *c);
1172 void zrangebyscoreCommand(redisClient *c);
1173 void zrevrangebyscoreCommand(redisClient *c);
1174 void zcountCommand(redisClient *c);
1175 void zrevrangeCommand(redisClient *c);
1176 void zcardCommand(redisClient *c);
1177 void zremCommand(redisClient *c);
1178 void zscoreCommand(redisClient *c);
1179 void zremrangebyscoreCommand(redisClient *c);
1180 void multiCommand(redisClient *c);
1181 void execCommand(redisClient *c);
1182 void discardCommand(redisClient *c);
1183 void blpopCommand(redisClient *c);
1184 void brpopCommand(redisClient *c);
1185 void brpoplpushCommand(redisClient *c);
1186 void appendCommand(redisClient *c);
1187 void strlenCommand(redisClient *c);
1188 void zrankCommand(redisClient *c);
1189 void zrevrankCommand(redisClient *c);
1190 void hsetCommand(redisClient *c);
1191 void hsetnxCommand(redisClient *c);
1192 void hgetCommand(redisClient *c);
1193 void hmsetCommand(redisClient *c);
1194 void hmgetCommand(redisClient *c);
1195 void hdelCommand(redisClient *c);
1196 void hlenCommand(redisClient *c);
1197 void zremrangebyrankCommand(redisClient *c);
1198 void zunionstoreCommand(redisClient *c);
1199 void zinterstoreCommand(redisClient *c);
1200 void hkeysCommand(redisClient *c);
1201 void hvalsCommand(redisClient *c);
1202 void hgetallCommand(redisClient *c);
1203 void hexistsCommand(redisClient *c);
1204 void configCommand(redisClient *c);
1205 void hincrbyCommand(redisClient *c);
1206 void subscribeCommand(redisClient *c);
1207 void unsubscribeCommand(redisClient *c);
1208 void psubscribeCommand(redisClient *c);
1209 void punsubscribeCommand(redisClient *c);
1210 void publishCommand(redisClient *c);
1211 void watchCommand(redisClient *c);
1212 void unwatchCommand(redisClient *c);
1213 void clusterCommand(redisClient *c);
1214 void restoreCommand(redisClient *c);
1215 void migrateCommand(redisClient *c);
1216 void dumpCommand(redisClient *c);
1217 void objectCommand(redisClient *c);
1218 void clientCommand(redisClient *c);
1219 void evalCommand(redisClient *c);
1220
1221 #if defined(__GNUC__)
1222 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1223 void free(void *ptr) __attribute__ ((deprecated));
1224 void *malloc(size_t size) __attribute__ ((deprecated));
1225 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1226 #endif
1227
1228 #endif
Redis += OpenLDAP MDB