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   1 /*
   2  * Summary: interface for memcached server
   3  * Description: main include file for libmemcached
   4  *
   5  * Copy: See Copyright for the status of this software.
   6  *
   7  * Author: Brian Aker
   8  */
   9
  10 #ifndef __MEMCACHED_H__
  11 #define __MEMCACHED_H__
  12
  13 #include <stdlib.h>
  14 #include <inttypes.h>
  15 #include <sys/types.h>
  16 #include <netinet/in.h>
  17
  18 #ifdef __cplusplus
  19 extern "C" {
  20 #endif
  21
  22 /* These are Private and should not be used by applications */
  23 #define MEMCACHED_VERSION_STRING_LENGTH 12
  24
  25 /* Public defines */
  26 #define MEMCACHED_DEFAULT_PORT 11211
  27 #define MEMCACHED_MAX_KEY 251 /* We add one to have it null terminated */
  28 #define MEMCACHED_MAX_BUFFER 8196
  29 #define MEMCACHED_MAX_HOST_LENGTH 64
  30 #define MEMCACHED_WHEEL_SIZE 1024
  31 #define MEMCACHED_STRIDE 4
  32 #define MEMCACHED_MAX_REPLICAS 4
  33 #define MEMCACHED_DEFAULT_TIMEOUT INT32_MAX
  34
  35 /* string value */
  36 #define LIBMEMCACHED_VERSION_STRING "0.17"
  37
  38 typedef enum {
  39   MEMCACHED_SUCCESS,
  40   MEMCACHED_FAILURE,
  41   MEMCACHED_HOST_LOOKUP_FAILURE,
  42   MEMCACHED_CONNECTION_FAILURE,
  43   MEMCACHED_CONNECTION_BIND_FAILURE,
  44   MEMCACHED_WRITE_FAILURE,
  45   MEMCACHED_READ_FAILURE,
  46   MEMCACHED_UNKNOWN_READ_FAILURE,
  47   MEMCACHED_PROTOCOL_ERROR,
  48   MEMCACHED_CLIENT_ERROR,
  49   MEMCACHED_SERVER_ERROR,
  50   MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE,
  51   MEMCACHED_DATA_EXISTS,
  52   MEMCACHED_DATA_DOES_NOT_EXIST,
  53   MEMCACHED_NOTSTORED,
  54   MEMCACHED_STORED,
  55   MEMCACHED_NOTFOUND,
  56   MEMCACHED_MEMORY_ALLOCATION_FAILURE,
  57   MEMCACHED_PARTIAL_READ,
  58   MEMCACHED_SOME_ERRORS,
  59   MEMCACHED_NO_SERVERS,
  60   MEMCACHED_END,
  61   MEMCACHED_DELETED,
  62   MEMCACHED_VALUE,
  63   MEMCACHED_STAT,
  64   MEMCACHED_ERRNO,
  65   MEMCACHED_FAIL_UNIX_SOCKET,
  66   MEMCACHED_NOT_SUPPORTED,
  67   MEMCACHED_NO_KEY_PROVIDED,
  68   MEMCACHED_FETCH_NOTFINISHED,
  69   MEMCACHED_TIMEOUT,
  70   MEMCACHED_BUFFERED,
  71   MEMCACHED_BAD_KEY_PROVIDED,
  72   MEMCACHED_MAXIMUM_RETURN, /* Always add new error code before */
  73 } memcached_return;
  74
  75 typedef struct memcached_st memcached_st;
  76 typedef struct memcached_stat_st memcached_stat_st;
  77 typedef struct memcached_result_st memcached_result_st;
  78 typedef struct memcached_string_st memcached_string_st;
  79 typedef struct memcached_server_st memcached_server_st;
  80 typedef memcached_return (*memcached_clone_func)(memcached_st *parent, memcached_st *clone);
  81 typedef memcached_return (*memcached_cleanup_func)(memcached_st *ptr);
  82 typedef void (*memcached_free_function)(memcached_st *ptr, void *mem);
  83 typedef void *(*memcached_malloc_function)(memcached_st *ptr, const size_t size);
  84 typedef void *(*memcached_realloc_function)(memcached_st *ptr, void *mem, const size_t size);
  85 typedef memcached_return (*memcached_execute_function)(memcached_st *ptr, memcached_result_st *result, void *context);
  86 typedef memcached_return (*memcached_server_function)(memcached_st *ptr, memcached_server_st *server, void *context);
  87
  88 typedef enum {
  89   MEMCACHED_DISTRIBUTION_MODULA,
  90   MEMCACHED_DISTRIBUTION_CONSISTENT,
  91 } memcached_server_distribution;
  92
  93 typedef enum {
  94   MEMCACHED_BEHAVIOR_NO_BLOCK,
  95   MEMCACHED_BEHAVIOR_TCP_NODELAY,
  96   MEMCACHED_BEHAVIOR_HASH,
  97   MEMCACHED_BEHAVIOR_KETAMA,
  98   MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE,
  99   MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE,
 100   MEMCACHED_BEHAVIOR_CACHE_LOOKUPS,
 101   MEMCACHED_BEHAVIOR_SUPPORT_CAS,
 102   MEMCACHED_BEHAVIOR_POLL_TIMEOUT,
 103   MEMCACHED_BEHAVIOR_DISTRIBUTION,
 104   MEMCACHED_BEHAVIOR_BUFFER_REQUESTS,
 105   MEMCACHED_BEHAVIOR_SORT_HOSTS,
 106   MEMCACHED_BEHAVIOR_VERIFY_KEY,
 107   MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT,
 108   MEMCACHED_BEHAVIOR_REPLICAS,
 109 } memcached_behavior;
 110
 111 typedef enum {
 112   MEMCACHED_CALLBACK_USER_DATA,
 113   MEMCACHED_CALLBACK_CLEANUP_FUNCTION,
 114   MEMCACHED_CALLBACK_CLONE_FUNCTION,
 115   MEMCACHED_CALLBACK_MALLOC_FUNCTION,
 116   MEMCACHED_CALLBACK_REALLOC_FUNCTION,
 117   MEMCACHED_CALLBACK_FREE_FUNCTION,
 118 } memcached_callback;
 119
 120 typedef enum {
 121   MEMCACHED_HASH_DEFAULT= 0,
 122   MEMCACHED_HASH_MD5,
 123   MEMCACHED_HASH_CRC,
 124   MEMCACHED_HASH_FNV1_64,
 125   MEMCACHED_HASH_FNV1A_64,
 126   MEMCACHED_HASH_FNV1_32,
 127   MEMCACHED_HASH_FNV1A_32,
 128   MEMCACHED_HASH_KETAMA,
 129   MEMCACHED_HASH_HSIEH,
 130 } memcached_hash;
 131
 132 typedef enum {
 133   MEMCACHED_CONNECTION_UNKNOWN,
 134   MEMCACHED_CONNECTION_TCP,
 135   MEMCACHED_CONNECTION_UDP,
 136   MEMCACHED_CONNECTION_UNIX_SOCKET,
 137 } memcached_connection;
 138
 139 typedef enum {
 140   MEMCACHED_NOT_ALLOCATED,
 141   MEMCACHED_ALLOCATED,
 142   MEMCACHED_USED,
 143 } memcached_allocated;
 144
 145 struct memcached_server_st {
 146   char hostname[MEMCACHED_MAX_HOST_LENGTH];
 147   unsigned int port;
 148   int fd;
 149   int cached_errno;
 150   unsigned int cursor_active;
 151   char write_buffer[MEMCACHED_MAX_BUFFER];
 152   size_t write_buffer_offset;
 153   char read_buffer[MEMCACHED_MAX_BUFFER];
 154   size_t read_data_length;
 155   size_t read_buffer_length;
 156   char *read_ptr;
 157   memcached_allocated sockaddr_inited;
 158   struct addrinfo *address_info;
 159   memcached_connection type;
 160   uint8_t major_version;
 161   uint8_t minor_version;
 162   uint8_t micro_version;
 163   uint16_t count;
 164   memcached_st *root;
 165 };
 166
 167 struct memcached_stat_st {
 168   uint32_t pid;
 169   uint32_t uptime;
 170   uint32_t threads;
 171   uint32_t time;
 172   uint32_t pointer_size;
 173   uint32_t rusage_user_seconds;
 174   uint32_t rusage_user_microseconds;
 175   uint32_t rusage_system_seconds;
 176   uint32_t rusage_system_microseconds;
 177   uint32_t curr_items;
 178   uint32_t total_items;
 179   uint64_t limit_maxbytes;
 180   uint32_t curr_connections;
 181   uint32_t total_connections;
 182   uint32_t connection_structures;
 183   uint64_t bytes;
 184   uint64_t cmd_get;
 185   uint64_t cmd_set;
 186   uint64_t get_hits;
 187   uint64_t get_misses;
 188   uint64_t evictions;
 189   uint64_t bytes_read;
 190   uint64_t bytes_written;
 191   char version[MEMCACHED_VERSION_STRING_LENGTH];
 192 };
 193
 194 struct memcached_string_st {
 195   memcached_st *root;
 196   memcached_allocated is_allocated;
 197   char *string;
 198   char *end;
 199   size_t current_size;
 200   size_t block_size;
 201 };
 202
 203 struct memcached_result_st {
 204   memcached_allocated is_allocated;
 205   memcached_st *root;
 206   char key[MEMCACHED_MAX_KEY];
 207   size_t key_length;
 208   memcached_string_st value;
 209   uint32_t flags;
 210   uint64_t cas;
 211   /* Add result callback function */
 212 };
 213
 214 struct memcached_st {
 215   memcached_allocated is_allocated;
 216   memcached_server_st *hosts;
 217   unsigned int number_of_hosts;
 218   unsigned int cursor_server;
 219   int cached_errno;
 220   uint32_t flags;
 221   int send_size;
 222   int recv_size;
 223   int32_t poll_timeout;
 224   int32_t connect_timeout;
 225   memcached_result_st result;
 226   memcached_hash hash;
 227   memcached_server_distribution distribution;
 228   void *user_data;
 229   unsigned int wheel[MEMCACHED_WHEEL_SIZE];
 230   memcached_clone_func on_clone;
 231   memcached_cleanup_func on_cleanup;
 232   memcached_free_function call_free;
 233   memcached_malloc_function call_malloc;
 234   memcached_realloc_function call_realloc;
 235   uint8_t number_of_replicas;
 236 #ifdef NOT_USED /* Future Use */
 237   memcached_return warning;
 238 #endif
 239 };
 240
 241 /* Public API */
 242 const char * memcached_lib_version(void);
 243
 244 memcached_st *memcached_create(memcached_st *ptr);
 245 void memcached_free(memcached_st *ptr);
 246 memcached_st *memcached_clone(memcached_st *clone, memcached_st *ptr);
 247
 248 memcached_return memcached_delete(memcached_st *ptr, char *key, size_t key_length,
 249                                   time_t expiration);
 250 memcached_return memcached_increment(memcached_st *ptr,
 251                                      char *key, size_t key_length,
 252                                      uint32_t offset,
 253                                      uint64_t *value);
 254 memcached_return memcached_decrement(memcached_st *ptr,
 255                                      char *key, size_t key_length,
 256                                      uint32_t offset,
 257                                      uint64_t *value);
 258 void memcached_stat_free(memcached_st *, memcached_stat_st *);
 259 memcached_stat_st *memcached_stat(memcached_st *ptr, char *args, memcached_return *error);
 260 memcached_return memcached_stat_servername(memcached_stat_st *stat, char *args,
 261                                            char *hostname, unsigned int port);
 262 memcached_return memcached_flush(memcached_st *ptr, time_t expiration);
 263 memcached_return memcached_verbosity(memcached_st *ptr, unsigned int verbosity);
 264 memcached_return memcached_version(memcached_st *ptr);
 265 void memcached_quit(memcached_st *ptr);
 266 char *memcached_strerror(memcached_st *ptr, memcached_return rc);
 267 memcached_return memcached_behavior_set(memcached_st *ptr, memcached_behavior flag, uint64_t data);
 268 uint64_t memcached_behavior_get(memcached_st *ptr, memcached_behavior flag);
 269
 270 /* All of the functions for adding data to the server */
 271 memcached_return memcached_set(memcached_st *ptr, char *key, size_t key_length,
 272                                char *value, size_t value_length,
 273                                time_t expiration,
 274                                uint32_t  flags);
 275 memcached_return memcached_add(memcached_st *ptr, char *key, size_t key_length,
 276                                char *value, size_t value_length,
 277                                time_t expiration,
 278                                uint32_t  flags);
 279 memcached_return memcached_replace(memcached_st *ptr, char *key, size_t key_length,
 280                                    char *value, size_t value_length,
 281                                    time_t expiration,
 282                                    uint32_t  flags);
 283 memcached_return memcached_append(memcached_st *ptr,
 284                                   char *key, size_t key_length,
 285                                   char *value, size_t value_length,
 286                                   time_t expiration,
 287                                   uint32_t flags);
 288 memcached_return memcached_prepend(memcached_st *ptr,
 289                                    char *key, size_t key_length,
 290                                    char *value, size_t value_length,
 291                                    time_t expiration,
 292                                    uint32_t flags);
 293 memcached_return memcached_cas(memcached_st *ptr,
 294                                char *key, size_t key_length,
 295                                char *value, size_t value_length,
 296                                time_t expiration,
 297                                uint32_t flags,
 298                                uint64_t cas);
 299
 300 /* Get functions */
 301 char *memcached_get(memcached_st *ptr, char *key, size_t key_length,
 302                     size_t *value_length,
 303                     uint32_t *flags,
 304                     memcached_return *error);
 305 memcached_return memcached_mget(memcached_st *ptr,
 306                                 char **keys, size_t *key_length,
 307                                 unsigned int number_of_keys);
 308 char *memcached_fetch(memcached_st *ptr, char *key, size_t *key_length,
 309                       size_t *value_length, uint32_t *flags,
 310                       memcached_return *error);
 311 memcached_result_st *memcached_fetch_result(memcached_st *ptr,
 312                                             memcached_result_st *result,
 313                                             memcached_return *error);
 314
 315 /* Server Public functions */
 316 #define memcached_server_count(A) (A)->number_of_hosts
 317 #define memcached_server_name(A,B) (B).hostname
 318 #define memcached_server_port(A,B) (B).port
 319 #define memcached_server_list(A) (A)->hosts
 320 #define memcached_server_response_count(A) (A)->cursor_active
 321
 322
 323 memcached_return memcached_server_add_udp(memcached_st *ptr,
 324                                           char *hostname,
 325                                           unsigned int port);
 326 memcached_return memcached_server_add_unix_socket(memcached_st *ptr,
 327                                                   char *filename);
 328 memcached_return memcached_server_add(memcached_st *ptr, char *hostname,
 329                                       unsigned int port);
 330 void memcached_server_list_free(memcached_server_st *ptr);
 331 memcached_return memcached_server_push(memcached_st *ptr, memcached_server_st *list);
 332
 333 memcached_server_st *memcached_server_list_append(memcached_server_st *ptr,
 334                                              char *hostname, unsigned int port,
 335                                              memcached_return *error);
 336 unsigned int memcached_server_list_count(memcached_server_st *ptr);
 337 memcached_server_st *memcached_servers_parse(char *server_strings);
 338
 339 char *memcached_stat_get_value(memcached_st *ptr, memcached_stat_st *stat,
 340                                char *key, memcached_return *error);
 341 char ** memcached_stat_get_keys(memcached_st *ptr, memcached_stat_st *stat,
 342                                 memcached_return *error);
 343
 344 char *memcached_get_by_key(memcached_st *ptr,
 345                            char *master_key, size_t master_key_length,
 346                            char *key, size_t key_length,
 347                            size_t *value_length,
 348                            uint32_t *flags,
 349                            memcached_return *error);
 350
 351 memcached_return memcached_mget_by_key(memcached_st *ptr,
 352                                        char *master_key, size_t master_key_length,
 353                                        char **keys, size_t *key_length,
 354                                        unsigned int number_of_keys);
 355
 356 memcached_return memcached_set_by_key(memcached_st *ptr,
 357                                       char *master_key, size_t master_key_length,
 358                                       char *key, size_t key_length,
 359                                       char *value, size_t value_length,
 360                                       time_t expiration,
 361                                       uint32_t flags);
 362
 363 memcached_return memcached_add_by_key(memcached_st *ptr,
 364                                       char *master_key, size_t master_key_length,
 365                                       char *key, size_t key_length,
 366                                       char *value, size_t value_length,
 367                                       time_t expiration,
 368                                       uint32_t flags);
 369
 370 memcached_return memcached_replace_by_key(memcached_st *ptr,
 371                                           char *master_key, size_t master_key_length,
 372                                           char *key, size_t key_length,
 373                                           char *value, size_t value_length,
 374                                           time_t expiration,
 375                                           uint32_t flags);
 376
 377 memcached_return memcached_prepend_by_key(memcached_st *ptr,
 378                                           char *master_key, size_t master_key_length,
 379                                           char *key, size_t key_length,
 380                                           char *value, size_t value_length,
 381                                           time_t expiration,
 382                                           uint32_t flags);
 383
 384 memcached_return memcached_append_by_key(memcached_st *ptr,
 385                                          char *master_key, size_t master_key_length,
 386                                          char *key, size_t key_length,
 387                                          char *value, size_t value_length,
 388                                          time_t expiration,
 389                                          uint32_t flags);
 390
 391 memcached_return memcached_cas_by_key(memcached_st *ptr,
 392                                       char *master_key, size_t master_key_length,
 393                                       char *key, size_t key_length,
 394                                       char *value, size_t value_length,
 395                                       time_t expiration,
 396                                       uint32_t flags,
 397                                       uint64_t cas);
 398 memcached_return memcached_delete_by_key(memcached_st *ptr,
 399                                          char *master_key, size_t master_key_length,
 400                                          char *key, size_t key_length,
 401                                          time_t expiration);
 402
 403 memcached_return memcached_fetch_execute(memcached_st *ptr,
 404                                              unsigned int (*callback[])(memcached_st *ptr, memcached_result_st *result, void *context),
 405                                              void *context,
 406                                              unsigned int number_of_callbacks
 407                                              );
 408
 409 memcached_return memcached_callback_set(memcached_st *ptr,
 410                                         memcached_callback flag,
 411                                         void *data);
 412 void *memcached_callback_get(memcached_st *ptr,
 413                              memcached_callback flag,
 414                              memcached_return *error);
 415
 416 memcached_return memcached_server_cursor(memcached_st *ptr,
 417                                          memcached_server_function *callback,
 418                                          void *context,
 419                                          unsigned int number_of_callbacks);
 420
 421 /* Result Struct */
 422 void memcached_result_free(memcached_result_st *result);
 423 memcached_result_st *memcached_result_create(memcached_st *ptr,
 424                                              memcached_result_st *result);
 425 #define memcached_result_key_value(A) (A)->key
 426 #define memcached_result_key_length(A) (A)->key_length
 427 #ifdef FIX
 428 #define memcached_result_value(A) memcached_string_value((A)->value)
 429 #define memcached_result_length(A) memcached_string_length((A)->value)
 430 #else
 431 char *memcached_result_value(memcached_result_st *ptr);
 432 size_t memcached_result_length(memcached_result_st *ptr);
 433 #endif
 434 #define memcached_result_flags(A) (A)->flags
 435 #define memcached_result_cas(A) (A)->cas
 436
 437
 438 #ifndef __WATCHPOINT_H__
 439 #define __WATCHPOINT_H__
 440 /* Some personal debugging functions */
 441 #ifdef HAVE_DEBUG
 442 #define WATCHPOINT fprintf(stderr, "\nWATCHPOINT %s:%d (%s)\n", __FILE__, __LINE__,__func__);fflush(stdout);
 443 #ifdef __MEMCACHED_H__
 444 #define WATCHPOINT_ERROR(A) fprintf(stderr, "\nWATCHPOINT %s:%d %s\n", __FILE__, __LINE__, memcached_strerror(NULL, A));fflush(stdout);
 445 #define WATCHPOINT_IFERROR(A) if(A != MEMCACHED_SUCCESS)fprintf(stderr, "\nWATCHPOINT %s:%d %s\n", __FILE__, __LINE__, memcached_strerror(NULL, A));fflush(stdout);
 446 #endif
 447 #define WATCHPOINT_STRING(A) fprintf(stderr, "\nWATCHPOINT %s:%d (%s) %s\n", __FILE__, __LINE__,__func__,A);fflush(stdout);
 448 #define WATCHPOINT_STRING_LENGTH(A,B) fprintf(stderr, "\nWATCHPOINT %s:%d (%s) %.*s\n", __FILE__, __LINE__,__func__,(int)B,A);fflush(stdout);
 449 #define WATCHPOINT_NUMBER(A) fprintf(stderr, "\nWATCHPOINT %s:%d (%s) %zu\n", __FILE__, __LINE__,__func__,(size_t)(A));fflush(stdout);
 450 #define WATCHPOINT_ERRNO(A) fprintf(stderr, "\nWATCHPOINT %s:%d (%s) %s\n", __FILE__, __LINE__,__func__, strerror(A));fflush(stdout);
 451 #define WATCHPOINT_ASSERT(A) assert((A));
 452 #else
 453 #define WATCHPOINT
 454 #ifdef __MEMCACHED_H__
 455 #define WATCHPOINT_ERROR(A)
 456 #define WATCHPOINT_IFERROR(A)
 457 #endif
 458 #define WATCHPOINT_STRING(A)
 459 #define WATCHPOINT_NUMBER(A)
 460 #define WATCHPOINT_ERRNO(A)
 461 #define WATCHPOINT_ASSERT(A)
 462 #endif
 463
 464 #endif /* __WATCHPOINT_H__ */
 465
 466
 467 #ifdef __cplusplus
 468 }
 469 #endif
 470
 471 #endif /* __MEMCACHED_H__ */