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