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   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  LibMemcached
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  Copyright (C) 2006-2009 Brian Aker
   7  *  All rights reserved.
   8  *
   9  *  Redistribution and use in source and binary forms, with or without
  10  *  modification, are permitted provided that the following conditions are
  11  *  met:
  12  *
  13  *      * Redistributions of source code must retain the above copyright
  14  *  notice, this list of conditions and the following disclaimer.
  15  *
  16  *      * Redistributions in binary form must reproduce the above
  17  *  copyright notice, this list of conditions and the following disclaimer
  18  *  in the documentation and/or other materials provided with the
  19  *  distribution.
  20  *
  21  *      * The names of its contributors may not be used to endorse or
  22  *  promote products derived from this software without specific prior
  23  *  written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  */
  38
  39 /*
  40   Common include file for libmemached
  41 */
  42
  43 #pragma once
  44
  45 #include <config.h>
  46
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <strings.h>
  51 #include <ctype.h>
  52 #include <sys/types.h>
  53 #include <unistd.h>
  54 #include <limits.h>
  55 #include <errno.h>
  56 #include <fcntl.h>
  57 #ifdef TIME_WITH_SYS_TIME
  58 # include <sys/time.h>
  59 # include <time.h>
  60 #else
  61 # ifdef HAVE_SYS_TIME_H
  62 #  include <sys/time.h>
  63 # else
  64 #  include <time.h>
  65 # endif
  66 #endif
  67
  68
  69 #include <libmemcached/memcached.h>
  70 #include <libmemcached/watchpoint.h>
  71 #include <libmemcached/is.h>
  72
  73 #ifdef __cplusplus
  74 extern "C" {
  75 #endif
  76
  77 typedef struct memcached_server_st * memcached_server_write_instance_st;
  78
  79 typedef memcached_return_t (*memcached_server_execute_fn)(memcached_st *ptr, memcached_server_write_instance_st server, void *context);
  80
  81 LIBMEMCACHED_LOCAL
  82 memcached_server_write_instance_st memcached_server_instance_fetch(memcached_st *ptr, uint32_t server_key);
  83
  84 LIBMEMCACHED_LOCAL
  85 memcached_return_t memcached_server_execute(memcached_st *ptr,
  86                                             memcached_server_execute_fn callback,
  87                                             void *context);
  88 #ifdef __cplusplus
  89 } // extern "C"
  90 #endif
  91
  92
  93 /* These are private not to be installed headers */
  94 #include <libmemcached/io.h>
  95 #include <libmemcached/do.h>
  96 #include <libmemcached/internal.h>
  97 #include <libmemcached/array.h>
  98 #include <libmemcached/libmemcached_probes.h>
  99 #include <libmemcached/memcached/protocol_binary.h>
 100 #include <libmemcached/byteorder.h>
 101 #include <libmemcached/initialize_query.h>
 102 #include <libmemcached/response.h>
 103 #include <libmemcached/prefix_key.h>
 104
 105 /* string value */
 106 struct memcached_continuum_item_st
 107 {
 108   uint32_t index;
 109   uint32_t value;
 110 };
 111
 112 #if !defined(__GNUC__) || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
 113
 114 #define likely(x)       if((x))
 115 #define unlikely(x)     if((x))
 116
 117 #else
 118
 119 #define likely(x)       if(__builtin_expect((x) != 0, 1))
 120 #define unlikely(x)     if(__builtin_expect((x) != 0, 0))
 121 #endif
 122
 123 #define MEMCACHED_BLOCK_SIZE 1024
 124 #define MEMCACHED_DEFAULT_COMMAND_SIZE 350
 125 #define SMALL_STRING_LEN 1024
 126 #define HUGE_STRING_LEN 8196
 127
 128 #ifdef __cplusplus
 129 extern "C" {
 130 #endif
 131
 132 LIBMEMCACHED_LOCAL
 133 memcached_return_t memcached_connect(memcached_server_write_instance_st ptr);
 134
 135 LIBMEMCACHED_LOCAL
 136 memcached_return_t run_distribution(memcached_st *ptr);
 137
 138 #define memcached_server_response_increment(A) (A)->cursor_active++
 139 #define memcached_server_response_decrement(A) (A)->cursor_active--
 140 #define memcached_server_response_reset(A) (A)->cursor_active=0
 141
 142 LIBMEMCACHED_LOCAL
 143 void set_last_disconnected_host(memcached_server_write_instance_st ptr);
 144
 145 LIBMEMCACHED_LOCAL
 146 memcached_return_t memcached_key_test(const char * const *keys,
 147                                       const size_t *key_length,
 148                                       size_t number_of_keys);
 149
 150 LIBMEMCACHED_LOCAL
 151 memcached_return_t memcached_purge(memcached_server_write_instance_st ptr);
 152
 153 LIBMEMCACHED_LOCAL
 154 memcached_server_st *memcached_server_create_with(const memcached_st *memc,
 155                                                   memcached_server_write_instance_st host,
 156                                                   const char *hostname,
 157                                                   in_port_t port,
 158                                                   uint32_t weight,
 159                                                   memcached_connection_t type);
 160
 161
 162 static inline memcached_return_t memcached_validate_key_length(size_t key_length, bool binary)
 163 {
 164   unlikely (key_length == 0)
 165     return MEMCACHED_BAD_KEY_PROVIDED;
 166
 167   if (binary)
 168   {
 169     unlikely (key_length > 0xffff)
 170       return MEMCACHED_BAD_KEY_PROVIDED;
 171   }
 172   else
 173   {
 174     unlikely (key_length >= MEMCACHED_MAX_KEY)
 175       return MEMCACHED_BAD_KEY_PROVIDED;
 176   }
 177
 178   return MEMCACHED_SUCCESS;
 179 }
 180
 181 static inline void libmemcached_free(const memcached_st *ptr, void *mem)
 182 {
 183   ptr->allocators.free(ptr, mem, ptr->allocators.context);
 184 }
 185
 186 static inline void *libmemcached_malloc(const memcached_st *ptr, const size_t size)
 187 {
 188   return ptr->allocators.malloc(ptr, size, ptr->allocators.context);
 189 }
 190
 191 static inline void *libmemcached_realloc(const memcached_st *ptr, void *mem, const size_t size)
 192 {
 193   return ptr->allocators.realloc(ptr, mem, size, ptr->allocators.context);
 194 }
 195
 196 static inline void *libmemcached_calloc(const memcached_st *ptr, size_t nelem, size_t size)
 197 {
 198   return ptr->allocators.calloc(ptr, nelem, size, ptr->allocators.context);
 199 }
 200
 201 #ifdef __cplusplus
 202 }
 203 #endif