git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/error.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  LibMemcached
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
  14  *
  15  *      * Redistributions in binary form must reproduce the above
  16  *  copyright notice, this list of conditions and the following disclaimer
  17  *  in the documentation and/or other materials provided with the
  18  *  distribution.
  19  *
  20  *      * The names of its contributors may not be used to endorse or
  21  *  promote products derived from this software without specific prior
  22  *  written permission.
  23  *
  24  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  */
  37
  38 #include "libmemcached/common.h"
  39
  40 #define MAX_ERROR_LENGTH 2048
  41 struct memcached_error_t
  42 {
  43   memcached_st *root;
  44   uint64_t query_id;
  45   struct memcached_error_t *next;
  46   memcached_return_t rc;
  47   int local_errno;
  48   size_t size;
  49   char message[MAX_ERROR_LENGTH];
  50 };
  51
  52 static void _set(memcached_st *memc, memcached_string_t *str, memcached_return_t &rc, int local_errno= 0)
  53 {
  54   WATCHPOINT_ASSERT(memc);
  55   if (not memc)
  56     return;
  57
  58   if (memc->error_messages && memc->error_messages->query_id != memc->query_id)
  59   {
  60     memcached_error_free(memc);
  61   }
  62
  63   if (rc == MEMCACHED_MEMORY_ALLOCATION_FAILURE or rc == MEMCACHED_ERRNO)
  64   {
  65     local_errno= errno;
  66     rc= MEMCACHED_ERRNO;
  67   }
  68
  69   memcached_error_t *error;
  70   error= (struct memcached_error_t *)libmemcached_malloc(memc, sizeof(struct memcached_error_t));
  71
  72   if (not error)
  73     return;
  74
  75   error->root= memc;
  76   error->query_id= memc->query_id;
  77   error->rc= rc;
  78   error->local_errno= local_errno;
  79
  80   if (str)
  81   {
  82     size_t length= str->size > (size_t)MAX_ERROR_LENGTH ? MAX_ERROR_LENGTH : str->size;
  83     error->size= length;
  84     memcpy(error->message, str->c_str, error->size);
  85     error->message[error->size]= 0;
  86   }
  87   else
  88   {
  89     error->size= 0;
  90   }
  91
  92   error->next= memc->error_messages;
  93   memc->error_messages= error;
  94 }
  95
  96 memcached_return_t memcached_set_error_string(memcached_st *memc, memcached_return_t rc, const char *str, size_t length)
  97 {
  98   memcached_string_t tmp;
  99   tmp.c_str= str;
 100   tmp.size= length;
 101   return memcached_set_error_message(memc, rc, &tmp);
 102 }
 103
 104 memcached_return_t memcached_set_error_message(memcached_st *memc, memcached_return_t rc, memcached_string_t *str)
 105 {
 106   if (rc == MEMCACHED_SUCCESS)
 107     return MEMCACHED_SUCCESS;
 108
 109   _set(memc, str, rc);
 110
 111   return rc;
 112 }
 113
 114 memcached_return_t memcached_set_error(memcached_server_st& self, memcached_return_t rc)
 115 {
 116   if (rc == MEMCACHED_SUCCESS)
 117     return MEMCACHED_SUCCESS;
 118
 119   char hostname_port[NI_MAXHOST +NI_MAXSERV + sizeof("host : ")];
 120   int size= snprintf(hostname_port, sizeof(hostname_port), "host: %s:%d", self.hostname, int(self.port));
 121
 122   memcached_string_t error_host= { size, hostname_port };
 123
 124   _set((memcached_st*)self.root, &error_host, rc);
 125
 126   return rc;
 127 }
 128
 129 memcached_return_t memcached_set_error(memcached_st* self, memcached_return_t rc)
 130 {
 131   if (memcached_success(rc))
 132     return MEMCACHED_SUCCESS;
 133
 134   _set(self, NULL, rc);
 135
 136   return rc;
 137 }
 138
 139 memcached_return_t memcached_set_error(memcached_st& self, memcached_return_t rc)
 140 {
 141   if (memcached_success(rc))
 142     return MEMCACHED_SUCCESS;
 143
 144   _set(&self, NULL, rc);
 145
 146   return rc;
 147 }
 148
 149 memcached_return_t memcached_set_errno(memcached_st *memc, int local_errno, memcached_string_t *str)
 150 {
 151   memcached_return_t rc= MEMCACHED_ERRNO;
 152   _set(memc, str, rc, local_errno);
 153
 154   return rc;
 155 }
 156
 157 memcached_return_t memcached_set_errno(memcached_server_st& self, int local_errno, memcached_string_t *)
 158 {
 159   char hostname_port[NI_MAXHOST +NI_MAXSERV + sizeof("host : ")];
 160   int size= snprintf(hostname_port, sizeof(hostname_port), "host: %s:%d", self.hostname, int(self.port));
 161
 162   memcached_string_t error_host= { size, hostname_port };
 163
 164   self.cached_errno= local_errno;
 165   memcached_return_t rc= MEMCACHED_ERRNO;
 166   _set((memcached_st*)self.root, &error_host, rc, local_errno);
 167
 168   return rc;
 169 }
 170
 171 static void _error_print(const memcached_error_t *error)
 172 {
 173   if (not error)
 174     return;
 175
 176   if (not error->size)
 177   {
 178     fprintf(stderr, "%s\n", memcached_strerror(NULL, error->rc) );
 179   }
 180   else
 181   {
 182     fprintf(stderr, "%s %s\n", memcached_strerror(NULL, error->rc), error->message);
 183   }
 184
 185   _error_print(error->next);
 186 }
 187
 188 void memcached_error_print(const memcached_st *self)
 189 {
 190   if (not self)
 191     return;
 192
 193   _error_print(self->error_messages);
 194 }
 195
 196 static void _error_free(memcached_error_t *error)
 197 {
 198   if (not error)
 199     return;
 200
 201   _error_free(error->next);
 202
 203   if (error && error->root)
 204   {
 205     libmemcached_free(error->root, error);
 206   }
 207   else if (error)
 208   {
 209     free(error);
 210   }
 211 }
 212
 213 void memcached_error_free(memcached_st *self)
 214 {
 215   if (not self)
 216     return;
 217
 218   _error_free(self->error_messages);
 219   self->error_messages= NULL;
 220 }
 221
 222 const char *memcached_last_error_message(memcached_st *memc)
 223 {
 224   if (not memc)
 225     return memcached_strerror(memc, MEMCACHED_INVALID_ARGUMENTS);
 226
 227   if (not memc->error_messages)
 228     return memcached_strerror(memc, MEMCACHED_SUCCESS);
 229
 230   if (not memc->error_messages->size)
 231     return memcached_strerror(memc, memc->error_messages->rc);
 232
 233   return memc->error_messages->message;
 234 }
 235
 236 memcached_return_t memcached_last_error(memcached_st *memc)
 237 {
 238   if (not memc)
 239     return MEMCACHED_INVALID_ARGUMENTS;
 240
 241   if (not memc->error_messages)
 242     return MEMCACHED_SUCCESS;
 243
 244   return memc->error_messages->rc;
 245 }
 246
 247 int memcached_last_error_errno(memcached_st *memc)
 248 {
 249   if (not memc)
 250     return 0;
 251
 252   if (not memc->error_messages)
 253     return 0;
 254
 255   return memc->error_messages->local_errno;
 256 }