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