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
  22 #include "ae.h"     /* Event driven programming library */
  23 #include "sds.h"    /* Dynamic safe strings */
  24 #include "dict.h"   /* Hash tables */
  25 #include "adlist.h" /* Linked lists */
  26 #include "zmalloc.h" /* total memory usage aware version of malloc/free */
  27 #include "anet.h"   /* Networking the easy way */
  28 #include "zipmap.h" /* Compact string -> string data structure */
  29 #include "ziplist.h" /* Compact list data structure */
  30 #include "intset.h" /* Compact integer set structure */
  31 #include "version.h"
  32
  33 /* Error codes */
  34 #define REDIS_OK                0
  35 #define REDIS_ERR               -1
  36
  37 /* Static server configuration */
  38 #define REDIS_SERVERPORT        6379    /* TCP port */
  39 #define REDIS_MAXIDLETIME       (60*5)  /* default client timeout */
  40 #define REDIS_IOBUF_LEN         1024
  41 #define REDIS_LOADBUF_LEN       1024
  42 #define REDIS_STATIC_ARGS       8
  43 #define REDIS_DEFAULT_DBNUM     16
  44 #define REDIS_CONFIGLINE_MAX    1024
  45 #define REDIS_MAX_SYNC_TIME     60      /* Slave can't take more to sync */
  46 #define REDIS_EXPIRELOOKUPS_PER_CRON    10 /* lookup 10 expires per loop */
  47 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
  48 #define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
  49 #define REDIS_SHARED_INTEGERS 10000
  50 #define REDIS_REPLY_CHUNK_BYTES (5*1500) /* 5 TCP packets with default MTU */
  51 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
  52
  53 /* Hash table parameters */
  54 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
  55
  56 /* Command flags:
  57  *   REDIS_CMD_DENYOOM:
  58  *     Commands marked with this flag will return an error when 'maxmemory' is
  59  *     set and the server is using more than 'maxmemory' bytes of memory.
  60  *     In short: commands with this flag are denied on low memory conditions.
  61  *   REDIS_CMD_FORCE_REPLICATION:
  62  *     Force replication even if dirty is 0. */
  63 #define REDIS_CMD_DENYOOM 4
  64 #define REDIS_CMD_FORCE_REPLICATION 8
  65
  66 /* Object types */
  67 #define REDIS_STRING 0
  68 #define REDIS_LIST 1
  69 #define REDIS_SET 2
  70 #define REDIS_ZSET 3
  71 #define REDIS_HASH 4
  72 #define REDIS_VMPOINTER 8
  73
  74 /* Objects encoding. Some kind of objects like Strings and Hashes can be
  75  * internally represented in multiple ways. The 'encoding' field of the object
  76  * is set to one of this fields for this object. */
  77 #define REDIS_ENCODING_RAW 0     /* Raw representation */
  78 #define REDIS_ENCODING_INT 1     /* Encoded as integer */
  79 #define REDIS_ENCODING_HT 2      /* Encoded as hash table */
  80 #define REDIS_ENCODING_ZIPMAP 3  /* Encoded as zipmap */
  81 #define REDIS_ENCODING_LINKEDLIST 4 /* Encoded as regular linked list */
  82 #define REDIS_ENCODING_ZIPLIST 5 /* Encoded as ziplist */
  83 #define REDIS_ENCODING_INTSET 6  /* Encoded as intset */
  84
  85 /* Object types only used for dumping to disk */
  86 #define REDIS_EXPIRETIME 253
  87 #define REDIS_SELECTDB 254
  88 #define REDIS_EOF 255
  89
  90 /* Defines related to the dump file format. To store 32 bits lengths for short
  91  * keys requires a lot of space, so we check the most significant 2 bits of
  92  * the first byte to interpreter the length:
  93  *
  94  * 00|000000 => if the two MSB are 00 the len is the 6 bits of this byte
  95  * 01|000000 00000000 =>  01, the len is 14 byes, 6 bits + 8 bits of next byte
  96  * 10|000000 [32 bit integer] => if it's 01, a full 32 bit len will follow
  97  * 11|000000 this means: specially encoded object will follow. The six bits
  98  *           number specify the kind of object that follows.
  99  *           See the REDIS_RDB_ENC_* defines.
 100  *
 101  * Lenghts up to 63 are stored using a single byte, most DB keys, and may
 102  * values, will fit inside. */
 103 #define REDIS_RDB_6BITLEN 0
 104 #define REDIS_RDB_14BITLEN 1
 105 #define REDIS_RDB_32BITLEN 2
 106 #define REDIS_RDB_ENCVAL 3
 107 #define REDIS_RDB_LENERR UINT_MAX
 108
 109 /* When a length of a string object stored on disk has the first two bits
 110  * set, the remaining two bits specify a special encoding for the object
 111  * accordingly to the following defines: */
 112 #define REDIS_RDB_ENC_INT8 0        /* 8 bit signed integer */
 113 #define REDIS_RDB_ENC_INT16 1       /* 16 bit signed integer */
 114 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 115 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 116
 117 /* Scheduled IO opeations flags. */
 118 #define REDIS_IO_LOAD 1
 119 #define REDIS_IO_SAVE 2
 120 #define REDIS_IO_LOADINPROG 4
 121 #define REDIS_IO_SAVEINPROG 8
 122
 123 /* Generic IO flags */
 124 #define REDIS_IO_ONLYLOADS 1
 125 #define REDIS_IO_ASAP 2
 126
 127 #define REDIS_MAX_COMPLETED_JOBS_PROCESSED 1
 128 #define REDIS_THREAD_STACK_SIZE (1024*1024*4)
 129
 130 /* Client flags */
 131 #define REDIS_SLAVE 1       /* This client is a slave server */
 132 #define REDIS_MASTER 2      /* This client is a master server */
 133 #define REDIS_MONITOR 4     /* This client is a slave monitor, see MONITOR */
 134 #define REDIS_MULTI 8       /* This client is in a MULTI context */
 135 #define REDIS_BLOCKED 16    /* The client is waiting in a blocking operation */
 136 #define REDIS_IO_WAIT 32    /* The client is waiting for Virtual Memory I/O */
 137 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 138 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 139 #define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
 140                                server.unblocked_clients */
 141
 142 /* Client request types */
 143 #define REDIS_REQ_INLINE 1
 144 #define REDIS_REQ_MULTIBULK 2
 145
 146 /* Slave replication state - slave side */
 147 #define REDIS_REPL_NONE 0   /* No active replication */
 148 #define REDIS_REPL_CONNECT 1    /* Must connect to master */
 149 #define REDIS_REPL_TRANSFER 2    /* Receiving .rdb from master */
 150 #define REDIS_REPL_CONNECTED 3  /* Connected to master */
 151
 152 /* Slave replication state - from the point of view of master
 153  * Note that in SEND_BULK and ONLINE state the slave receives new updates
 154  * in its output queue. In the WAIT_BGSAVE state instead the server is waiting
 155  * to start the next background saving in order to send updates to it. */
 156 #define REDIS_REPL_WAIT_BGSAVE_START 3 /* master waits bgsave to start feeding it */
 157 #define REDIS_REPL_WAIT_BGSAVE_END 4 /* master waits bgsave to start bulk DB transmission */
 158 #define REDIS_REPL_SEND_BULK 5 /* master is sending the bulk DB */
 159 #define REDIS_REPL_ONLINE 6 /* bulk DB already transmitted, receive updates */
 160
 161 /* List related stuff */
 162 #define REDIS_HEAD 0
 163 #define REDIS_TAIL 1
 164
 165 /* Sort operations */
 166 #define REDIS_SORT_GET 0
 167 #define REDIS_SORT_ASC 1
 168 #define REDIS_SORT_DESC 2
 169 #define REDIS_SORTKEY_MAX 1024
 170
 171 /* Log levels */
 172 #define REDIS_DEBUG 0
 173 #define REDIS_VERBOSE 1
 174 #define REDIS_NOTICE 2
 175 #define REDIS_WARNING 3
 176
 177 /* Anti-warning macro... */
 178 #define REDIS_NOTUSED(V) ((void) V)
 179
 180 #define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^32 elements */
 181 #define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
 182
 183 /* Append only defines */
 184 #define APPENDFSYNC_NO 0
 185 #define APPENDFSYNC_ALWAYS 1
 186 #define APPENDFSYNC_EVERYSEC 2
 187
 188 /* Zip structure related defaults */
 189 #define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
 190 #define REDIS_HASH_MAX_ZIPMAP_VALUE 64
 191 #define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
 192 #define REDIS_LIST_MAX_ZIPLIST_VALUE 64
 193 #define REDIS_SET_MAX_INTSET_ENTRIES 512
 194
 195 /* Sets operations codes */
 196 #define REDIS_OP_UNION 0
 197 #define REDIS_OP_DIFF 1
 198 #define REDIS_OP_INTER 2
 199
 200 /* Redis maxmemory strategies */
 201 #define REDIS_MAXMEMORY_VOLATILE_LRU 0
 202 #define REDIS_MAXMEMORY_VOLATILE_TTL 1
 203 #define REDIS_MAXMEMORY_VOLATILE_RANDOM 2
 204 #define REDIS_MAXMEMORY_ALLKEYS_LRU 3
 205 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 206 #define REDIS_MAXMEMORY_NO_EVICTION 5
 207
 208 /* Diskstore background saving thread states */
 209 #define REDIS_BGSAVE_THREAD_UNACTIVE 0
 210 #define REDIS_BGSAVE_THREAD_ACTIVE 1
 211 #define REDIS_BGSAVE_THREAD_DONE_OK 2
 212 #define REDIS_BGSAVE_THREAD_DONE_ERR 3
 213
 214 /* We can print the stacktrace, so our assert is defined this way: */
 215 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 216 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 217 void _redisAssert(char *estr, char *file, int line);
 218 void _redisPanic(char *msg, char *file, int line);
 219
 220 /*-----------------------------------------------------------------------------
 221  * Data types
 222  *----------------------------------------------------------------------------*/
 223
 224 /* A redis object, that is a type able to hold a string / list / set */
 225
 226 /* The actual Redis Object */
 227 #define REDIS_LRU_CLOCK_MAX ((1<<21)-1) /* Max value of obj->lru */
 228 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 229 typedef struct redisObject {
 230     unsigned type:4;
 231     unsigned notused:2;     /* Not used */
 232     unsigned encoding:4;
 233     unsigned lru:22;        /* lru time (relative to server.lruclock) */
 234     int refcount;
 235     void *ptr;
 236     /* VM fields are only allocated if VM is active, otherwise the
 237      * object allocation function will just allocate
 238      * sizeof(redisObjct) minus sizeof(redisObjectVM), so using
 239      * Redis without VM active will not have any overhead. */
 240 } robj;
 241
 242 /* The VM pointer structure - identifies an object in the swap file.
 243  *
 244  * This object is stored in place of the value
 245  * object in the main key->value hash table representing a database.
 246  * Note that the first fields (type, storage) are the same as the redisObject
 247  * structure so that vmPointer strucuters can be accessed even when casted
 248  * as redisObject structures.
 249  *
 250  * This is useful as we don't know if a value object is or not on disk, but we
 251  * are always able to read obj->storage to check this. For vmPointer
 252  * structures "type" is set to REDIS_VMPOINTER (even if without this field
 253  * is still possible to check the kind of object from the value of 'storage').*/
 254 typedef struct vmPointer {
 255     unsigned type:4;
 256     unsigned storage:2; /* REDIS_VM_SWAPPED or REDIS_VM_LOADING */
 257     unsigned notused:26;
 258     unsigned int vtype; /* type of the object stored in the swap file */
 259     off_t page;         /* the page at witch the object is stored on disk */
 260     off_t usedpages;    /* number of pages used on disk */
 261 } vmpointer;
 262
 263 /* Macro used to initalize a Redis object allocated on the stack.
 264  * Note that this macro is taken near the structure definition to make sure
 265  * we'll update it when the structure is changed, to avoid bugs like
 266  * bug #85 introduced exactly in this way. */
 267 #define initStaticStringObject(_var,_ptr) do { \
 268     _var.refcount = 1; \
 269     _var.type = REDIS_STRING; \
 270     _var.encoding = REDIS_ENCODING_RAW; \
 271     _var.ptr = _ptr; \
 272 } while(0);
 273
 274 typedef struct redisDb {
 275     dict *dict;                 /* The keyspace for this DB */
 276     dict *expires;              /* Timeout of keys with a timeout set */
 277     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 278     dict *io_keys;              /* Keys with clients waiting for DS I/O */
 279     dict *io_negcache;          /* Negative caching for disk store */
 280     dict *io_queued;            /* Queued IO operations hash table */
 281     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
 282     int id;
 283 } redisDb;
 284
 285 /* Client MULTI/EXEC state */
 286 typedef struct multiCmd {
 287     robj **argv;
 288     int argc;
 289     struct redisCommand *cmd;
 290 } multiCmd;
 291
 292 typedef struct multiState {
 293     multiCmd *commands;     /* Array of MULTI commands */
 294     int count;              /* Total number of MULTI commands */
 295 } multiState;
 296
 297 typedef struct blockingState {
 298     robj **keys;            /* The key we are waiting to terminate a blocking
 299                              * operation such as BLPOP. Otherwise NULL. */
 300     int count;              /* Number of blocking keys */
 301     time_t timeout;         /* Blocking operation timeout. If UNIX current time
 302                              * is >= timeout then the operation timed out. */
 303     robj *target;           /* The key that should receive the element,
 304                              * for BRPOPLPUSH. */
 305 } blockingState;
 306
 307 /* With multiplexing we need to take per-clinet state.
 308  * Clients are taken in a liked list. */
 309 typedef struct redisClient {
 310     int fd;
 311     redisDb *db;
 312     int dictid;
 313     sds querybuf;
 314     int argc;
 315     robj **argv;
 316     int reqtype;
 317     int multibulklen;       /* number of multi bulk arguments left to read */
 318     long bulklen;           /* length of bulk argument in multi bulk request */
 319     list *reply;
 320     int sentlen;
 321     time_t lastinteraction; /* time of the last interaction, used for timeout */
 322     int flags;              /* REDIS_SLAVE | REDIS_MONITOR | REDIS_MULTI ... */
 323     int slaveseldb;         /* slave selected db, if this client is a slave */
 324     int authenticated;      /* when requirepass is non-NULL */
 325     int replstate;          /* replication state if this is a slave */
 326     int repldbfd;           /* replication DB file descriptor */
 327     long repldboff;         /* replication DB file offset */
 328     off_t repldbsize;       /* replication DB file size */
 329     multiState mstate;      /* MULTI/EXEC state */
 330     blockingState bpop;   /* blocking state */
 331     list *io_keys;          /* Keys this client is waiting to be loaded from the
 332                              * swap file in order to continue. */
 333     list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
 334     dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
 335     list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
 336
 337     /* Response buffer */
 338     int bufpos;
 339     char buf[REDIS_REPLY_CHUNK_BYTES];
 340 } redisClient;
 341
 342 struct saveparam {
 343     time_t seconds;
 344     int changes;
 345 };
 346
 347 struct sharedObjectsStruct {
 348     robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *cnegone, *pong, *space,
 349     *colon, *nullbulk, *nullmultibulk, *queued,
 350     *emptymultibulk, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
 351     *outofrangeerr, *loadingerr, *plus,
 352     *select0, *select1, *select2, *select3, *select4,
 353     *select5, *select6, *select7, *select8, *select9,
 354     *messagebulk, *pmessagebulk, *subscribebulk, *unsubscribebulk, *mbulk3,
 355     *mbulk4, *psubscribebulk, *punsubscribebulk,
 356     *integers[REDIS_SHARED_INTEGERS];
 357 };
 358
 359 /* Global server state structure */
 360 struct redisServer {
 361     /* General */
 362     pthread_t mainthread;
 363     redisDb *db;
 364     dict *commands;             /* Command table hahs table */
 365     aeEventLoop *el;
 366     /* Networking */
 367     int port;
 368     char *bindaddr;
 369     char *unixsocket;
 370     int ipfd;
 371     int sofd;
 372     list *clients;
 373     list *slaves, *monitors;
 374     char neterr[ANET_ERR_LEN];
 375     /* RDB / AOF loading information */
 376     int loading;
 377     off_t loading_total_bytes;
 378     off_t loading_loaded_bytes;
 379     time_t loading_start_time;
 380     /* Fast pointers to often looked up command */
 381     struct redisCommand *delCommand, *multiCommand;
 382     int cronloops;              /* number of times the cron function run */
 383     time_t lastsave;                /* Unix time of last save succeeede */
 384     /* Fields used only for stats */
 385     time_t stat_starttime;          /* server start time */
 386     long long stat_numcommands;     /* number of processed commands */
 387     long long stat_numconnections;  /* number of connections received */
 388     long long stat_expiredkeys;     /* number of expired keys */
 389     long long stat_evictedkeys;     /* number of evicted keys (maxmemory) */
 390     long long stat_keyspace_hits;   /* number of successful lookups of keys */
 391     long long stat_keyspace_misses; /* number of failed lookups of keys */
 392     /* Configuration */
 393     int verbosity;
 394     int maxidletime;
 395     int dbnum;
 396     int daemonize;
 397     int appendonly;
 398     int appendfsync;
 399     int no_appendfsync_on_rewrite;
 400     int shutdown_asap;
 401     int activerehashing;
 402     char *requirepass;
 403     /* Persistence */
 404     long long dirty;            /* changes to DB from the last save */
 405     long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */
 406     time_t lastfsync;
 407     int appendfd;
 408     int appendseldb;
 409     char *pidfile;
 410     pid_t bgsavechildpid;
 411     pid_t bgrewritechildpid;
 412     int bgsavethread_state;
 413     pthread_mutex_t bgsavethread_mutex;
 414     pthread_t bgsavethread;
 415     sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
 416     sds aofbuf;       /* AOF buffer, written before entering the event loop */
 417     struct saveparam *saveparams;
 418     int saveparamslen;
 419     char *dbfilename;
 420     int rdbcompression;
 421     char *appendfilename;
 422     /* Logging */
 423     char *logfile;
 424     int syslog_enabled;
 425     char *syslog_ident;
 426     int syslog_facility;
 427     /* Replication related */
 428     int isslave;
 429     /* Slave specific fields */
 430     char *masterauth;
 431     char *masterhost;
 432     int masterport;
 433     redisClient *master;    /* client that is master for this slave */
 434     int replstate;          /* replication status if the instance is a slave */
 435     off_t repl_transfer_left;  /* bytes left reading .rdb  */
 436     int repl_transfer_s;    /* slave -> master SYNC socket */
 437     int repl_transfer_fd;   /* slave -> master SYNC temp file descriptor */
 438     char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */
 439     time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */
 440     int repl_serve_stale_data; /* Serve stale data when link is down? */
 441     /* Limits */
 442     unsigned int maxclients;
 443     unsigned long long maxmemory;
 444     int maxmemory_policy;
 445     int maxmemory_samples;
 446     /* Blocked clients */
 447     unsigned int bpop_blocked_clients;
 448     unsigned int cache_blocked_clients;
 449     list *unblocked_clients; /* list of clients to unblock before next loop */
 450     list *cache_io_queue;    /* IO operations queue */
 451     int cache_flush_delay;   /* seconds to wait before flushing keys */
 452     /* Sort parameters - qsort_r() is only available under BSD so we
 453      * have to take this state global, in order to pass it to sortCompare() */
 454     int sort_desc;
 455     int sort_alpha;
 456     int sort_bypattern;
 457     /* Virtual memory configuration */
 458     int ds_enabled; /* backend disk in redis.conf */
 459     char *ds_path;  /* location of the disk store on disk */
 460     unsigned long long cache_max_memory;
 461     /* Zip structure config */
 462     size_t hash_max_zipmap_entries;
 463     size_t hash_max_zipmap_value;
 464     size_t list_max_ziplist_entries;
 465     size_t list_max_ziplist_value;
 466     size_t set_max_intset_entries;
 467     time_t unixtime;    /* Unix time sampled every second. */
 468     /* Virtual memory I/O threads stuff */
 469     /* An I/O thread process an element taken from the io_jobs queue and
 470      * put the result of the operation in the io_done list. While the
 471      * job is being processed, it's put on io_processing queue. */
 472     list *io_newjobs; /* List of VM I/O jobs yet to be processed */
 473     list *io_processing; /* List of VM I/O jobs being processed */
 474     list *io_processed; /* List of VM I/O jobs already processed */
 475     list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
 476     pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */
 477     pthread_cond_t io_condvar; /* I/O threads conditional variable */
 478     pthread_attr_t io_threads_attr; /* attributes for threads creation */
 479     int io_active_threads; /* Number of running I/O threads */
 480     int vm_max_threads; /* Max number of I/O threads running at the same time */
 481     /* Our main thread is blocked on the event loop, locking for sockets ready
 482      * to be read or written, so when a threaded I/O operation is ready to be
 483      * processed by the main thread, the I/O thread will use a unix pipe to
 484      * awake the main thread. The followings are the two pipe FDs. */
 485     int io_ready_pipe_read;
 486     int io_ready_pipe_write;
 487     /* Virtual memory stats */
 488     unsigned long long vm_stats_used_pages;
 489     unsigned long long vm_stats_swapped_objects;
 490     unsigned long long vm_stats_swapouts;
 491     unsigned long long vm_stats_swapins;
 492     /* Pubsub */
 493     dict *pubsub_channels; /* Map channels to list of subscribed clients */
 494     list *pubsub_patterns; /* A list of pubsub_patterns */
 495     /* Misc */
 496     unsigned lruclock:22;        /* clock incrementing every minute, for LRU */
 497     unsigned lruclock_padding:10;
 498 };
 499
 500 typedef struct pubsubPattern {
 501     redisClient *client;
 502     robj *pattern;
 503 } pubsubPattern;
 504
 505 typedef void redisCommandProc(redisClient *c);
 506 typedef void redisVmPreloadProc(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
 507 struct redisCommand {
 508     char *name;
 509     redisCommandProc *proc;
 510     int arity;
 511     int flags;
 512     /* Use a function to determine which keys need to be loaded
 513      * in the background prior to executing this command. Takes precedence
 514      * over vm_firstkey and others, ignored when NULL */
 515     redisVmPreloadProc *vm_preload_proc;
 516     /* What keys should be loaded in background when calling this command? */
 517     int vm_firstkey; /* The first argument that's a key (0 = no keys) */
 518     int vm_lastkey;  /* THe last argument that's a key */
 519     int vm_keystep;  /* The step between first and last key */
 520     long long microseconds, calls;
 521 };
 522
 523 struct redisFunctionSym {
 524     char *name;
 525     unsigned long pointer;
 526 };
 527
 528 typedef struct _redisSortObject {
 529     robj *obj;
 530     union {
 531         double score;
 532         robj *cmpobj;
 533     } u;
 534 } redisSortObject;
 535
 536 typedef struct _redisSortOperation {
 537     int type;
 538     robj *pattern;
 539 } redisSortOperation;
 540
 541 /* ZSETs use a specialized version of Skiplists */
 542 typedef struct zskiplistNode {
 543     robj *obj;
 544     double score;
 545     struct zskiplistNode *backward;
 546     struct zskiplistLevel {
 547         struct zskiplistNode *forward;
 548         unsigned int span;
 549     } level[];
 550 } zskiplistNode;
 551
 552 typedef struct zskiplist {
 553     struct zskiplistNode *header, *tail;
 554     unsigned long length;
 555     int level;
 556 } zskiplist;
 557
 558 typedef struct zset {
 559     dict *dict;
 560     zskiplist *zsl;
 561 } zset;
 562
 563 /* DIsk store threaded I/O request message */
 564 #define REDIS_IOJOB_LOAD 0
 565 #define REDIS_IOJOB_SAVE 1
 566
 567 typedef struct iojob {
 568     int type;   /* Request type, REDIS_IOJOB_* */
 569     redisDb *db;/* Redis database */
 570     robj *key;  /* This I/O request is about this key */
 571     robj *val;  /* the value to swap for REDIS_IOJOB_SAVE, otherwise this
 572                  * field is populated by the I/O thread for REDIS_IOJOB_LOAD. */
 573     time_t expire; /* Expire time for this key on REDIS_IOJOB_LOAD */
 574 } iojob;
 575
 576 /* IO operations scheduled -- check dscache.c for more info */
 577 typedef struct ioop {
 578     int type;
 579     redisDb *db;
 580     robj *key;
 581     time_t ctime; /* This is the creation time of the entry. */
 582 } ioop;
 583
 584 /* Structure to hold list iteration abstraction. */
 585 typedef struct {
 586     robj *subject;
 587     unsigned char encoding;
 588     unsigned char direction; /* Iteration direction */
 589     unsigned char *zi;
 590     listNode *ln;
 591 } listTypeIterator;
 592
 593 /* Structure for an entry while iterating over a list. */
 594 typedef struct {
 595     listTypeIterator *li;
 596     unsigned char *zi;  /* Entry in ziplist */
 597     listNode *ln;       /* Entry in linked list */
 598 } listTypeEntry;
 599
 600 /* Structure to hold set iteration abstraction. */
 601 typedef struct {
 602     robj *subject;
 603     int encoding;
 604     int ii; /* intset iterator */
 605     dictIterator *di;
 606 } setTypeIterator;
 607
 608 /* Structure to hold hash iteration abstration. Note that iteration over
 609  * hashes involves both fields and values. Because it is possible that
 610  * not both are required, store pointers in the iterator to avoid
 611  * unnecessary memory allocation for fields/values. */
 612 typedef struct {
 613     int encoding;
 614     unsigned char *zi;
 615     unsigned char *zk, *zv;
 616     unsigned int zklen, zvlen;
 617
 618     dictIterator *di;
 619     dictEntry *de;
 620 } hashTypeIterator;
 621
 622 #define REDIS_HASH_KEY 1
 623 #define REDIS_HASH_VALUE 2
 624
 625 /*-----------------------------------------------------------------------------
 626  * Extern declarations
 627  *----------------------------------------------------------------------------*/
 628
 629 extern struct redisServer server;
 630 extern struct sharedObjectsStruct shared;
 631 extern dictType setDictType;
 632 extern dictType zsetDictType;
 633 extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
 634 dictType hashDictType;
 635
 636 /*-----------------------------------------------------------------------------
 637  * Functions prototypes
 638  *----------------------------------------------------------------------------*/
 639
 640 /* Utils */
 641 long long ustime(void);
 642
 643 /* networking.c -- Networking and Client related operations */
 644 redisClient *createClient(int fd);
 645 void closeTimedoutClients(void);
 646 void freeClient(redisClient *c);
 647 void resetClient(redisClient *c);
 648 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 649 void addReply(redisClient *c, robj *obj);
 650 void *addDeferredMultiBulkLength(redisClient *c);
 651 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 652 void addReplySds(redisClient *c, sds s);
 653 void processInputBuffer(redisClient *c);
 654 void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 655 void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 656 void readQueryFromClient(aeEventLoop *el, int fd, void *privdata, int mask);
 657 void addReplyBulk(redisClient *c, robj *obj);
 658 void addReplyBulkCString(redisClient *c, char *s);
 659 void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 660 void addReplyBulkLongLong(redisClient *c, long long ll);
 661 void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask);
 662 void addReply(redisClient *c, robj *obj);
 663 void addReplySds(redisClient *c, sds s);
 664 void addReplyError(redisClient *c, char *err);
 665 void addReplyStatus(redisClient *c, char *status);
 666 void addReplyDouble(redisClient *c, double d);
 667 void addReplyLongLong(redisClient *c, long long ll);
 668 void addReplyMultiBulkLen(redisClient *c, long length);
 669 void *dupClientReplyValue(void *o);
 670 void getClientsMaxBuffers(unsigned long *longest_output_list,
 671                           unsigned long *biggest_input_buffer);
 672
 673 #ifdef __GNUC__
 674 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 675     __attribute__((format(printf, 2, 3)));
 676 void addReplyStatusFormat(redisClient *c, const char *fmt, ...)
 677     __attribute__((format(printf, 2, 3)));
 678 #else
 679 void addReplyErrorFormat(redisClient *c, const char *fmt, ...);
 680 void addReplyStatusFormat(redisClient *c, const char *fmt, ...);
 681 #endif
 682
 683 /* List data type */
 684 void listTypeTryConversion(robj *subject, robj *value);
 685 void listTypePush(robj *subject, robj *value, int where);
 686 robj *listTypePop(robj *subject, int where);
 687 unsigned long listTypeLength(robj *subject);
 688 listTypeIterator *listTypeInitIterator(robj *subject, int index, unsigned char direction);
 689 void listTypeReleaseIterator(listTypeIterator *li);
 690 int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
 691 robj *listTypeGet(listTypeEntry *entry);
 692 void listTypeInsert(listTypeEntry *entry, robj *value, int where);
 693 int listTypeEqual(listTypeEntry *entry, robj *o);
 694 void listTypeDelete(listTypeEntry *entry);
 695 void listTypeConvert(robj *subject, int enc);
 696 void unblockClientWaitingData(redisClient *c);
 697 int handleClientsWaitingListPush(redisClient *c, robj *key, robj *ele);
 698 void popGenericCommand(redisClient *c, int where);
 699
 700 /* MULTI/EXEC/WATCH... */
 701 void unwatchAllKeys(redisClient *c);
 702 void initClientMultiState(redisClient *c);
 703 void freeClientMultiState(redisClient *c);
 704 void queueMultiCommand(redisClient *c, struct redisCommand *cmd);
 705 void touchWatchedKey(redisDb *db, robj *key);
 706 void touchWatchedKeysOnFlush(int dbid);
 707
 708 /* Redis object implementation */
 709 void decrRefCount(void *o);
 710 void incrRefCount(robj *o);
 711 void freeStringObject(robj *o);
 712 void freeListObject(robj *o);
 713 void freeSetObject(robj *o);
 714 void freeZsetObject(robj *o);
 715 void freeHashObject(robj *o);
 716 robj *createObject(int type, void *ptr);
 717 robj *createStringObject(char *ptr, size_t len);
 718 robj *dupStringObject(robj *o);
 719 robj *tryObjectEncoding(robj *o);
 720 robj *getDecodedObject(robj *o);
 721 size_t stringObjectLen(robj *o);
 722 robj *createStringObjectFromLongLong(long long value);
 723 robj *createListObject(void);
 724 robj *createZiplistObject(void);
 725 robj *createSetObject(void);
 726 robj *createIntsetObject(void);
 727 robj *createHashObject(void);
 728 robj *createZsetObject(void);
 729 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 730 int checkType(redisClient *c, robj *o, int type);
 731 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);
 732 int getDoubleFromObjectOrReply(redisClient *c, robj *o, double *target, const char *msg);
 733 int getLongLongFromObject(robj *o, long long *target);
 734 char *strEncoding(int encoding);
 735 int compareStringObjects(robj *a, robj *b);
 736 int equalStringObjects(robj *a, robj *b);
 737 unsigned long estimateObjectIdleTime(robj *o);
 738
 739 /* Synchronous I/O with timeout */
 740 int syncWrite(int fd, char *ptr, ssize_t size, int timeout);
 741 int syncRead(int fd, char *ptr, ssize_t size, int timeout);
 742 int syncReadLine(int fd, char *ptr, ssize_t size, int timeout);
 743 int fwriteBulkString(FILE *fp, char *s, unsigned long len);
 744 int fwriteBulkDouble(FILE *fp, double d);
 745 int fwriteBulkLongLong(FILE *fp, long long l);
 746 int fwriteBulkObject(FILE *fp, robj *obj);
 747
 748 /* Replication */
 749 void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
 750 void replicationFeedMonitors(list *monitors, int dictid, robj **argv, int argc);
 751 int syncWithMaster(void);
 752 void updateSlavesWaitingBgsave(int bgsaveerr);
 753 void replicationCron(void);
 754
 755 /* Generic persistence functions */
 756 void startLoading(FILE *fp);
 757 void loadingProgress(off_t pos);
 758 void stopLoading(void);
 759
 760 /* RDB persistence */
 761 int rdbLoad(char *filename);
 762 int rdbSaveBackground(char *filename);
 763 void rdbRemoveTempFile(pid_t childpid);
 764 int rdbSave(char *filename);
 765 int rdbSaveObject(FILE *fp, robj *o);
 766 off_t rdbSavedObjectLen(robj *o);
 767 off_t rdbSavedObjectPages(robj *o);
 768 robj *rdbLoadObject(int type, FILE *fp);
 769 void backgroundSaveDoneHandler(int exitcode, int bysignal);
 770 int rdbSaveKeyValuePair(FILE *fp, robj *key, robj *val, time_t expireitme, time_t now);
 771 int rdbLoadType(FILE *fp);
 772 time_t rdbLoadTime(FILE *fp);
 773 robj *rdbLoadStringObject(FILE *fp);
 774 int rdbSaveType(FILE *fp, unsigned char type);
 775 int rdbSaveLen(FILE *fp, uint32_t len);
 776
 777 /* AOF persistence */
 778 void flushAppendOnlyFile(void);
 779 void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc);
 780 void aofRemoveTempFile(pid_t childpid);
 781 int rewriteAppendOnlyFileBackground(void);
 782 int loadAppendOnlyFile(char *filename);
 783 void stopAppendOnly(void);
 784 int startAppendOnly(void);
 785 void backgroundRewriteDoneHandler(int exitcode, int bysignal);
 786
 787 /* Sorted sets data type */
 788 zskiplist *zslCreate(void);
 789 void zslFree(zskiplist *zsl);
 790 zskiplistNode *zslInsert(zskiplist *zsl, double score, robj *obj);
 791
 792 /* Core functions */
 793 void freeMemoryIfNeeded(void);
 794 int processCommand(redisClient *c);
 795 void setupSigSegvAction(void);
 796 struct redisCommand *lookupCommand(sds name);
 797 struct redisCommand *lookupCommandByCString(char *s);
 798 void call(redisClient *c, struct redisCommand *cmd);
 799 int prepareForShutdown();
 800 void redisLog(int level, const char *fmt, ...);
 801 void usage();
 802 void updateDictResizePolicy(void);
 803 int htNeedsResize(dict *dict);
 804 void oom(const char *msg);
 805 void populateCommandTable(void);
 806 void resetCommandTableStats(void);
 807
 808 /* Disk store */
 809 int dsOpen(void);
 810 int dsClose(void);
 811 int dsSet(redisDb *db, robj *key, robj *val, time_t expire);
 812 robj *dsGet(redisDb *db, robj *key, time_t *expire);
 813 int dsDel(redisDb *db, robj *key);
 814 int dsExists(redisDb *db, robj *key);
 815 void dsFlushDb(int dbid);
 816 int dsRdbSaveBackground(char *filename);
 817 int dsRdbSave(char *filename);
 818
 819 /* Disk Store Cache */
 820 void dsInit(void);
 821 void vmThreadedIOCompletedJob(aeEventLoop *el, int fd, void *privdata, int mask);
 822 void lockThreadedIO(void);
 823 void unlockThreadedIO(void);
 824 void freeIOJob(iojob *j);
 825 void queueIOJob(iojob *j);
 826 void waitEmptyIOJobsQueue(void);
 827 void processAllPendingIOJobs(void);
 828 void zunionInterBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
 829 void execBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
 830 int blockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd);
 831 int dontWaitForSwappedKey(redisClient *c, robj *key);
 832 void handleClientsBlockedOnSwappedKey(redisDb *db, robj *key);
 833 int cacheFreeOneEntry(void);
 834 void cacheScheduleIOAddFlag(redisDb *db, robj *key, long flag);
 835 void cacheScheduleIODelFlag(redisDb *db, robj *key, long flag);
 836 int cacheScheduleIOGetFlags(redisDb *db, robj *key);
 837 void cacheScheduleIO(redisDb *db, robj *key, int type);
 838 void cacheCron(void);
 839 int cacheKeyMayExist(redisDb *db, robj *key);
 840 void cacheSetKeyMayExist(redisDb *db, robj *key);
 841 void cacheSetKeyDoesNotExist(redisDb *db, robj *key);
 842 void cacheForcePointInTime(void);
 843
 844 /* Set data type */
 845 robj *setTypeCreate(robj *value);
 846 int setTypeAdd(robj *subject, robj *value);
 847 int setTypeRemove(robj *subject, robj *value);
 848 int setTypeIsMember(robj *subject, robj *value);
 849 setTypeIterator *setTypeInitIterator(robj *subject);
 850 void setTypeReleaseIterator(setTypeIterator *si);
 851 int setTypeNext(setTypeIterator *si, robj **objele, int64_t *llele);
 852 robj *setTypeNextObject(setTypeIterator *si);
 853 int setTypeRandomElement(robj *setobj, robj **objele, int64_t *llele);
 854 unsigned long setTypeSize(robj *subject);
 855 void setTypeConvert(robj *subject, int enc);
 856
 857 /* Hash data type */
 858 void convertToRealHash(robj *o);
 859 void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
 860 void hashTypeTryObjectEncoding(robj *subject, robj **o1, robj **o2);
 861 int hashTypeGet(robj *o, robj *key, robj **objval, unsigned char **v, unsigned int *vlen);
 862 robj *hashTypeGetObject(robj *o, robj *key);
 863 int hashTypeExists(robj *o, robj *key);
 864 int hashTypeSet(robj *o, robj *key, robj *value);
 865 int hashTypeDelete(robj *o, robj *key);
 866 unsigned long hashTypeLength(robj *o);
 867 hashTypeIterator *hashTypeInitIterator(robj *subject);
 868 void hashTypeReleaseIterator(hashTypeIterator *hi);
 869 int hashTypeNext(hashTypeIterator *hi);
 870 int hashTypeCurrent(hashTypeIterator *hi, int what, robj **objval, unsigned char **v, unsigned int *vlen);
 871 robj *hashTypeCurrentObject(hashTypeIterator *hi, int what);
 872 robj *hashTypeLookupWriteOrCreate(redisClient *c, robj *key);
 873
 874 /* Pub / Sub */
 875 int pubsubUnsubscribeAllChannels(redisClient *c, int notify);
 876 int pubsubUnsubscribeAllPatterns(redisClient *c, int notify);
 877 void freePubsubPattern(void *p);
 878 int listMatchPubsubPattern(void *a, void *b);
 879
 880 /* Utility functions */
 881 int stringmatchlen(const char *pattern, int patternLen,
 882         const char *string, int stringLen, int nocase);
 883 int stringmatch(const char *pattern, const char *string, int nocase);
 884 long long memtoll(const char *p, int *err);
 885 int ll2string(char *s, size_t len, long long value);
 886 int isStringRepresentableAsLong(sds s, long *longval);
 887 int isStringRepresentableAsLongLong(sds s, long long *longval);
 888 int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
 889
 890 /* Configuration */
 891 void loadServerConfig(char *filename);
 892 void appendServerSaveParams(time_t seconds, int changes);
 893 void resetServerSaveParams();
 894
 895 /* db.c -- Keyspace access API */
 896 int removeExpire(redisDb *db, robj *key);
 897 void propagateExpire(redisDb *db, robj *key);
 898 int expireIfNeeded(redisDb *db, robj *key);
 899 time_t getExpire(redisDb *db, robj *key);
 900 void setExpire(redisDb *db, robj *key, time_t when);
 901 robj *lookupKey(redisDb *db, robj *key);
 902 robj *lookupKeyRead(redisDb *db, robj *key);
 903 robj *lookupKeyWrite(redisDb *db, robj *key);
 904 robj *lookupKeyReadOrReply(redisClient *c, robj *key, robj *reply);
 905 robj *lookupKeyWriteOrReply(redisClient *c, robj *key, robj *reply);
 906 int dbAdd(redisDb *db, robj *key, robj *val);
 907 int dbReplace(redisDb *db, robj *key, robj *val);
 908 int dbExists(redisDb *db, robj *key);
 909 robj *dbRandomKey(redisDb *db);
 910 int dbDelete(redisDb *db, robj *key);
 911 long long emptyDb();
 912 int selectDb(redisClient *c, int id);
 913 void signalModifiedKey(redisDb *db, robj *key);
 914 void signalFlushedDb(int dbid);
 915
 916 /* Git SHA1 */
 917 char *redisGitSHA1(void);
 918 char *redisGitDirty(void);
 919
 920 /* Commands prototypes */
 921 void authCommand(redisClient *c);
 922 void pingCommand(redisClient *c);
 923 void echoCommand(redisClient *c);
 924 void setCommand(redisClient *c);
 925 void setnxCommand(redisClient *c);
 926 void setexCommand(redisClient *c);
 927 void getCommand(redisClient *c);
 928 void delCommand(redisClient *c);
 929 void existsCommand(redisClient *c);
 930 void setbitCommand(redisClient *c);
 931 void getbitCommand(redisClient *c);
 932 void setrangeCommand(redisClient *c);
 933 void getrangeCommand(redisClient *c);
 934 void incrCommand(redisClient *c);
 935 void decrCommand(redisClient *c);
 936 void incrbyCommand(redisClient *c);
 937 void decrbyCommand(redisClient *c);
 938 void selectCommand(redisClient *c);
 939 void randomkeyCommand(redisClient *c);
 940 void keysCommand(redisClient *c);
 941 void dbsizeCommand(redisClient *c);
 942 void lastsaveCommand(redisClient *c);
 943 void saveCommand(redisClient *c);
 944 void bgsaveCommand(redisClient *c);
 945 void bgrewriteaofCommand(redisClient *c);
 946 void shutdownCommand(redisClient *c);
 947 void moveCommand(redisClient *c);
 948 void renameCommand(redisClient *c);
 949 void renamenxCommand(redisClient *c);
 950 void lpushCommand(redisClient *c);
 951 void rpushCommand(redisClient *c);
 952 void lpushxCommand(redisClient *c);
 953 void rpushxCommand(redisClient *c);
 954 void linsertCommand(redisClient *c);
 955 void lpopCommand(redisClient *c);
 956 void rpopCommand(redisClient *c);
 957 void llenCommand(redisClient *c);
 958 void lindexCommand(redisClient *c);
 959 void lrangeCommand(redisClient *c);
 960 void ltrimCommand(redisClient *c);
 961 void typeCommand(redisClient *c);
 962 void lsetCommand(redisClient *c);
 963 void saddCommand(redisClient *c);
 964 void sremCommand(redisClient *c);
 965 void smoveCommand(redisClient *c);
 966 void sismemberCommand(redisClient *c);
 967 void scardCommand(redisClient *c);
 968 void spopCommand(redisClient *c);
 969 void srandmemberCommand(redisClient *c);
 970 void sinterCommand(redisClient *c);
 971 void sinterstoreCommand(redisClient *c);
 972 void sunionCommand(redisClient *c);
 973 void sunionstoreCommand(redisClient *c);
 974 void sdiffCommand(redisClient *c);
 975 void sdiffstoreCommand(redisClient *c);
 976 void syncCommand(redisClient *c);
 977 void flushdbCommand(redisClient *c);
 978 void flushallCommand(redisClient *c);
 979 void sortCommand(redisClient *c);
 980 void lremCommand(redisClient *c);
 981 void rpoplpushCommand(redisClient *c);
 982 void infoCommand(redisClient *c);
 983 void mgetCommand(redisClient *c);
 984 void monitorCommand(redisClient *c);
 985 void expireCommand(redisClient *c);
 986 void expireatCommand(redisClient *c);
 987 void getsetCommand(redisClient *c);
 988 void ttlCommand(redisClient *c);
 989 void persistCommand(redisClient *c);
 990 void slaveofCommand(redisClient *c);
 991 void debugCommand(redisClient *c);
 992 void msetCommand(redisClient *c);
 993 void msetnxCommand(redisClient *c);
 994 void zaddCommand(redisClient *c);
 995 void zincrbyCommand(redisClient *c);
 996 void zrangeCommand(redisClient *c);
 997 void zrangebyscoreCommand(redisClient *c);
 998 void zrevrangebyscoreCommand(redisClient *c);
 999 void zcountCommand(redisClient *c);
1000 void zrevrangeCommand(redisClient *c);
1001 void zcardCommand(redisClient *c);
1002 void zremCommand(redisClient *c);
1003 void zscoreCommand(redisClient *c);
1004 void zremrangebyscoreCommand(redisClient *c);
1005 void multiCommand(redisClient *c);
1006 void execCommand(redisClient *c);
1007 void discardCommand(redisClient *c);
1008 void blpopCommand(redisClient *c);
1009 void brpopCommand(redisClient *c);
1010 void brpoplpushCommand(redisClient *c);
1011 void appendCommand(redisClient *c);
1012 void strlenCommand(redisClient *c);
1013 void zrankCommand(redisClient *c);
1014 void zrevrankCommand(redisClient *c);
1015 void hsetCommand(redisClient *c);
1016 void hsetnxCommand(redisClient *c);
1017 void hgetCommand(redisClient *c);
1018 void hmsetCommand(redisClient *c);
1019 void hmgetCommand(redisClient *c);
1020 void hdelCommand(redisClient *c);
1021 void hlenCommand(redisClient *c);
1022 void zremrangebyrankCommand(redisClient *c);
1023 void zunionstoreCommand(redisClient *c);
1024 void zinterstoreCommand(redisClient *c);
1025 void hkeysCommand(redisClient *c);
1026 void hvalsCommand(redisClient *c);
1027 void hgetallCommand(redisClient *c);
1028 void hexistsCommand(redisClient *c);
1029 void configCommand(redisClient *c);
1030 void hincrbyCommand(redisClient *c);
1031 void subscribeCommand(redisClient *c);
1032 void unsubscribeCommand(redisClient *c);
1033 void psubscribeCommand(redisClient *c);
1034 void punsubscribeCommand(redisClient *c);
1035 void publishCommand(redisClient *c);
1036 void watchCommand(redisClient *c);
1037 void unwatchCommand(redisClient *c);
1038
1039 #if defined(__GNUC__)
1040 void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
1041 void free(void *ptr) __attribute__ ((deprecated));
1042 void *malloc(size_t size) __attribute__ ((deprecated));
1043 void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
1044 #endif
1045
1046 #endif