X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=libmemcached%2Fhosts.c;h=eafbb1b534ca083e76cb76fc75698403047549fe;hb=b048aacba5d279f3271163cfaa0704684beca1e2;hp=1cbc80305f4e0f2ba7011d4be2adbf62fb9b1de9;hpb=93a5a39800fce1f1ee70edf0968f6a5407682ad2;p=awesomized%2Flibmemcached

diff --git a/libmemcached/hosts.c b/libmemcached/hosts.c
index 1cbc8030..eafbb1b5 100644
--- a/libmemcached/hosts.c
+++ b/libmemcached/hosts.c
@@ -1,3 +1,14 @@
+/* LibMemcached
+ * Copyright (C) 2006-2010 Brian Aker
+ * All rights reserved.
+ *
+ * Use and distribution licensed under the BSD license.  See
+ * the COPYING file in the parent directory for full text.
+ *
+ * Summary: 
+ *
+ */
+
 #include "common.h"
 #include <math.h>
 
@@ -6,13 +17,14 @@ static memcached_return_t server_add(memcached_st *ptr, const char *hostname,
                                      in_port_t port,
                                      uint32_t weight,
                                      memcached_connection_t type);
+
 static memcached_return_t update_continuum(memcached_st *ptr);
 
 static int compare_servers(const void *p1, const void *p2)
 {
   int return_value;
-  memcached_server_instance_st *a= (memcached_server_instance_st *)p1;
-  memcached_server_instance_st *b= (memcached_server_instance_st *)p2;
+  memcached_server_instance_st a= (memcached_server_instance_st)p1;
+  memcached_server_instance_st b= (memcached_server_instance_st)p2;
 
   return_value= strcmp(a->hostname, b->hostname);
 
@@ -28,9 +40,9 @@ static void sort_hosts(memcached_st *ptr)
 {
   if (memcached_server_count(ptr))
   {
-    memcached_server_instance_st *instance;
+    memcached_server_write_instance_st instance;
 
-    qsort(memcached_server_list(ptr), memcached_server_count(ptr), sizeof(memcached_server_instance_st), compare_servers);
+    qsort(memcached_server_list(ptr), memcached_server_count(ptr), sizeof(memcached_server_st), compare_servers);
     instance= memcached_server_instance_fetch(ptr, 0);
     instance->number_of_hosts= memcached_server_count(ptr);
   }
@@ -47,7 +59,9 @@ memcached_return_t run_distribution(memcached_st *ptr)
   case MEMCACHED_DISTRIBUTION_CONSISTENT:
   case MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA:
   case MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPY:
+  case MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTED:
     return update_continuum(ptr);
+  case MEMCACHED_DISTRIBUTION_VIRTUAL_BUCKET:
   case MEMCACHED_DISTRIBUTION_MODULA:
     break;
   case MEMCACHED_DISTRIBUTION_RANDOM:
@@ -58,16 +72,15 @@ memcached_return_t run_distribution(memcached_st *ptr)
     WATCHPOINT_ASSERT(0); /* We have added a distribution without extending the logic */
   }
 
-  ptr->last_disconnected_server = NULL;
-
   return MEMCACHED_SUCCESS;
 }
 
-static uint32_t ketama_server_hash(const char *key, unsigned int key_length, int alignment)
+static uint32_t ketama_server_hash(const char *key, size_t key_length, uint32_t alignment)
 {
   unsigned char results[16];
 
-  md5_signature((unsigned char*)key, key_length, results);
+  libhashkit_md5_signature((unsigned char*)key, key_length, results);
+
   return ((uint32_t) (results[3 + alignment * 4] & 0xFF) << 24)
     | ((uint32_t) (results[2 + alignment * 4] & 0xFF) << 16)
     | ((uint32_t) (results[1 + alignment * 4] & 0xFF) << 8)
@@ -91,43 +104,36 @@ static int continuum_item_cmp(const void *t1, const void *t2)
 
 static memcached_return_t update_continuum(memcached_st *ptr)
 {
-  uint32_t host_index;
   uint32_t continuum_index= 0;
-  uint32_t value;
-  memcached_server_instance_st *list;
-  uint32_t pointer_index;
+  memcached_server_st *list;
   uint32_t pointer_counter= 0;
   uint32_t pointer_per_server= MEMCACHED_POINTS_PER_SERVER;
   uint32_t pointer_per_hash= 1;
-  uint64_t total_weight= 0;
-  uint64_t is_ketama_weighted= 0;
-  uint64_t is_auto_ejecting= 0;
-  uint32_t points_per_server= 0;
   uint32_t live_servers= 0;
   struct timeval now;
 
   if (gettimeofday(&now, NULL) != 0)
   {
-    ptr->cached_errno = errno;
+    memcached_set_errno(ptr, errno, NULL);
     return MEMCACHED_ERRNO;
   }
 
-  list = memcached_server_list(ptr);
+  list= memcached_server_list(ptr);
 
   /* count live servers (those without a retry delay set) */
-  is_auto_ejecting= memcached_behavior_get(ptr, MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS);
+  bool is_auto_ejecting= _is_auto_eject_host(ptr);
   if (is_auto_ejecting)
   {
     live_servers= 0;
-    ptr->next_distribution_rebuild= 0;
-    for (host_index= 0; host_index < memcached_server_count(ptr); ++host_index)
+    ptr->ketama.next_distribution_rebuild= 0;
+    for (uint32_t host_index= 0; host_index < memcached_server_count(ptr); ++host_index)
     {
       if (list[host_index].next_retry <= now.tv_sec)
         live_servers++;
       else
       {
-        if (ptr->next_distribution_rebuild == 0 || list[host_index].next_retry < ptr->next_distribution_rebuild)
-          ptr->next_distribution_rebuild= list[host_index].next_retry;
+        if (ptr->ketama.next_distribution_rebuild == 0 || list[host_index].next_retry < ptr->ketama.next_distribution_rebuild)
+          ptr->ketama.next_distribution_rebuild= list[host_index].next_retry;
       }
     }
   }
@@ -136,40 +142,39 @@ static memcached_return_t update_continuum(memcached_st *ptr)
     live_servers= memcached_server_count(ptr);
   }
 
-  is_ketama_weighted= memcached_behavior_get(ptr, MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED);
-  points_per_server= (uint32_t) (is_ketama_weighted ? MEMCACHED_POINTS_PER_SERVER_KETAMA : MEMCACHED_POINTS_PER_SERVER);
+  uint64_t is_ketama_weighted= memcached_behavior_get(ptr, MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED);
+  uint32_t points_per_server= (uint32_t) (is_ketama_weighted ? MEMCACHED_POINTS_PER_SERVER_KETAMA : MEMCACHED_POINTS_PER_SERVER);
 
   if (live_servers == 0)
     return MEMCACHED_SUCCESS;
 
-  if (live_servers > ptr->continuum_count)
+  if (live_servers > ptr->ketama.continuum_count)
   {
     memcached_continuum_item_st *new_ptr;
 
-    new_ptr= ptr->call_realloc(ptr, ptr->continuum,
-                               sizeof(memcached_continuum_item_st) * (live_servers + MEMCACHED_CONTINUUM_ADDITION) * points_per_server);
+    new_ptr= libmemcached_realloc(ptr, ptr->ketama.continuum,
+                                  sizeof(memcached_continuum_item_st) * (live_servers + MEMCACHED_CONTINUUM_ADDITION) * points_per_server);
 
     if (new_ptr == 0)
       return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
 
-    ptr->continuum= new_ptr;
-    ptr->continuum_count= live_servers + MEMCACHED_CONTINUUM_ADDITION;
+    ptr->ketama.continuum= new_ptr;
+    ptr->ketama.continuum_count= live_servers + MEMCACHED_CONTINUUM_ADDITION;
   }
 
+  uint64_t total_weight= 0;
   if (is_ketama_weighted)
   {
-    for (host_index = 0; host_index < memcached_server_count(ptr); ++host_index)
+    for (uint32_t host_index = 0; host_index < memcached_server_count(ptr); ++host_index)
     {
-      if (list[host_index].weight == 0)
+      if (! is_auto_ejecting || list[host_index].next_retry <= now.tv_sec)
       {
-        list[host_index].weight = 1;
-      }
-      if (!is_auto_ejecting || list[host_index].next_retry <= now.tv_sec)
         total_weight += list[host_index].weight;
+      }
     }
   }
 
-  for (host_index = 0; host_index < memcached_server_count(ptr); ++host_index)
+  for (uint32_t host_index= 0; host_index < memcached_server_count(ptr); ++host_index)
   {
     if (is_auto_ejecting && list[host_index].next_retry > now.tv_sec)
       continue;
@@ -191,20 +196,25 @@ static memcached_return_t update_continuum(memcached_st *ptr)
 
     if (ptr->distribution == MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPY)
     {
-      for (pointer_index= 0;
+      for (uint32_t pointer_index= 0;
            pointer_index < pointer_per_server / pointer_per_hash;
            pointer_index++)
       {
         char sort_host[MEMCACHED_MAX_HOST_SORT_LENGTH]= "";
-        size_t sort_host_length;
+        int sort_host_length;
 
         // Spymemcached ketema key format is: hostname/ip:port-index
         // If hostname is not available then: /ip:port-index
-        sort_host_length= (size_t) snprintf(sort_host, MEMCACHED_MAX_HOST_SORT_LENGTH,
-                                            "/%s:%u-%u",
-                                            list[host_index].hostname,
-                                            (uint32_t)list[host_index].port,
-                                            pointer_index);
+        sort_host_length= snprintf(sort_host, MEMCACHED_MAX_HOST_SORT_LENGTH,
+                                   "/%s:%u-%u",
+                                   list[host_index].hostname,
+                                   (uint32_t)list[host_index].port,
+                                   pointer_index);
+
+        if (sort_host_length >= MEMCACHED_MAX_HOST_SORT_LENGTH || sort_host_length < 0)
+        {
+          return MEMCACHED_FAILURE;
+        }
 #ifdef DEBUG
         printf("update_continuum: key is %s\n", sort_host);
 #endif
@@ -213,64 +223,67 @@ static memcached_return_t update_continuum(memcached_st *ptr)
 
         if (is_ketama_weighted)
         {
-          unsigned int i;
-          for (i = 0; i < pointer_per_hash; i++)
+          for (uint32_t x= 0; x < pointer_per_hash; x++)
           {
-             value= ketama_server_hash(sort_host, (uint32_t) sort_host_length, (int) i);
-             ptr->continuum[continuum_index].index= host_index;
-             ptr->continuum[continuum_index++].value= value;
+            uint32_t value= ketama_server_hash(sort_host, (size_t)sort_host_length, x);
+             ptr->ketama.continuum[continuum_index].index= host_index;
+             ptr->ketama.continuum[continuum_index++].value= value;
           }
         }
         else
         {
-          value= memcached_generate_hash_value(sort_host, sort_host_length, ptr->distribution_hash);
-          ptr->continuum[continuum_index].index= host_index;
-          ptr->continuum[continuum_index++].value= value;
+          uint32_t value= hashkit_digest(&ptr->distribution_hashkit, sort_host, (size_t)sort_host_length);
+          ptr->ketama.continuum[continuum_index].index= host_index;
+          ptr->ketama.continuum[continuum_index++].value= value;
         }
       }
     }
     else
     {
-      for (pointer_index= 1;
+      for (uint32_t pointer_index= 1;
            pointer_index <= pointer_per_server / pointer_per_hash;
            pointer_index++)
       {
         char sort_host[MEMCACHED_MAX_HOST_SORT_LENGTH]= "";
-        size_t sort_host_length;
+        int sort_host_length;
 
         if (list[host_index].port == MEMCACHED_DEFAULT_PORT)
         {
-          sort_host_length= (size_t) snprintf(sort_host, MEMCACHED_MAX_HOST_SORT_LENGTH,
-                                              "%s-%u",
-                                              list[host_index].hostname,
-                                              pointer_index - 1);
+          sort_host_length= snprintf(sort_host, MEMCACHED_MAX_HOST_SORT_LENGTH,
+                                     "%s-%u",
+                                     list[host_index].hostname,
+                                     pointer_index - 1);
         }
         else
         {
-          sort_host_length= (size_t) snprintf(sort_host, MEMCACHED_MAX_HOST_SORT_LENGTH,
-                                              "%s:%u-%u",
-                                              list[host_index].hostname,
-                                              (uint32_t)list[host_index].port,
-                                              pointer_index - 1);
+          sort_host_length= snprintf(sort_host, MEMCACHED_MAX_HOST_SORT_LENGTH,
+                                     "%s:%u-%u",
+                                     list[host_index].hostname,
+                                     (uint32_t)list[host_index].port,
+                                     pointer_index - 1);
+        }
+
+        if (sort_host_length >= MEMCACHED_MAX_HOST_SORT_LENGTH || sort_host_length < 0)
+        {
+          return MEMCACHED_FAILURE;
         }
 
         WATCHPOINT_ASSERT(sort_host_length);
 
         if (is_ketama_weighted)
         {
-          unsigned int i;
-          for (i = 0; i < pointer_per_hash; i++)
+          for (uint32_t x = 0; x < pointer_per_hash; x++)
           {
-             value= ketama_server_hash(sort_host, (uint32_t) sort_host_length, (int) i);
-             ptr->continuum[continuum_index].index= host_index;
-             ptr->continuum[continuum_index++].value= value;
+             uint32_t value= ketama_server_hash(sort_host, (size_t)sort_host_length, x);
+             ptr->ketama.continuum[continuum_index].index= host_index;
+             ptr->ketama.continuum[continuum_index++].value= value;
           }
         }
         else
         {
-          value= memcached_generate_hash_value(sort_host, sort_host_length, ptr->distribution_hash);
-          ptr->continuum[continuum_index].index= host_index;
-          ptr->continuum[continuum_index++].value= value;
+          uint32_t value= hashkit_digest(&ptr->distribution_hashkit, sort_host, (size_t)sort_host_length);
+          ptr->ketama.continuum[continuum_index].index= host_index;
+          ptr->ketama.continuum[continuum_index++].value= value;
         }
       }
     }
@@ -281,11 +294,11 @@ static memcached_return_t update_continuum(memcached_st *ptr)
   WATCHPOINT_ASSERT(ptr);
   WATCHPOINT_ASSERT(ptr->continuum);
   WATCHPOINT_ASSERT(memcached_server_count(ptr) * MEMCACHED_POINTS_PER_SERVER <= MEMCACHED_CONTINUUM_SIZE);
-  ptr->continuum_points_counter= pointer_counter;
-  qsort(ptr->continuum, ptr->continuum_points_counter, sizeof(memcached_continuum_item_st), continuum_item_cmp);
+  ptr->ketama.continuum_points_counter= pointer_counter;
+  qsort(ptr->ketama.continuum, ptr->ketama.continuum_points_counter, sizeof(memcached_continuum_item_st), continuum_item_cmp);
 
 #ifdef DEBUG
-  for (pointer_index= 0; memcached_server_count(ptr) && pointer_index < ((live_servers * MEMCACHED_POINTS_PER_SERVER) - 1); pointer_index++)
+  for (uint32_t pointer_index= 0; memcached_server_count(ptr) && pointer_index < ((live_servers * MEMCACHED_POINTS_PER_SERVER) - 1); pointer_index++)
   {
     WATCHPOINT_ASSERT(ptr->continuum[pointer_index].value <= ptr->continuum[pointer_index + 1].value);
   }
@@ -295,38 +308,38 @@ static memcached_return_t update_continuum(memcached_st *ptr)
 }
 
 
-memcached_return_t memcached_server_push(memcached_st *ptr, memcached_server_st *list)
+memcached_return_t memcached_server_push(memcached_st *ptr, const memcached_server_list_st list)
 {
-  uint32_t x;
   uint32_t count;
   memcached_server_st *new_host_list;
 
   if (! list)
     return MEMCACHED_SUCCESS;
 
-  count= memcached_servers_count(list);
-  new_host_list= ptr->call_realloc(ptr, memcached_server_list(ptr),
-                                   sizeof(memcached_server_instance_st) * (count + memcached_server_count(ptr)));
+  count= memcached_server_list_count(list);
+  new_host_list= libmemcached_realloc(ptr, memcached_server_list(ptr),
+                                      sizeof(memcached_server_st) * (count + memcached_server_count(ptr)));
 
   if (! new_host_list)
     return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
 
   memcached_server_list_set(ptr, new_host_list);
 
-  for (x= 0; x < count; x++)
+  for (uint32_t x= 0; x < count; x++)
   {
-    memcached_server_instance_st *instance;
+    memcached_server_write_instance_st instance;
 
     if ((ptr->flags.use_udp && list[x].type != MEMCACHED_CONNECTION_UDP)
             || ((list[x].type == MEMCACHED_CONNECTION_UDP)
             && ! (ptr->flags.use_udp)) )
+    {
       return MEMCACHED_INVALID_HOST_PROTOCOL;
+    }
 
     WATCHPOINT_ASSERT(list[x].hostname[0] != 0);
 
     instance= memcached_server_instance_fetch(ptr, memcached_server_count(ptr));
 
-    memcached_server_create(ptr, instance);
     /* TODO check return type */
     (void)memcached_server_create_with(ptr, instance, list[x].hostname,
                                        list[x].port, list[x].weight, list[x].type);
@@ -335,7 +348,7 @@ memcached_return_t memcached_server_push(memcached_st *ptr, memcached_server_st
 
   // Provides backwards compatibility with server list.
   {
-    memcached_server_instance_st *instance;
+    memcached_server_write_instance_st instance;
     instance= memcached_server_instance_fetch(ptr, 0);
     instance->number_of_hosts= memcached_server_count(ptr);
   }
@@ -406,15 +419,15 @@ static memcached_return_t server_add(memcached_st *ptr, const char *hostname,
                                      uint32_t weight,
                                      memcached_connection_t type)
 {
-  memcached_server_instance_st *new_host_list;
-  memcached_server_instance_st *instance;
+  memcached_server_st *new_host_list;
+  memcached_server_write_instance_st instance;
 
   if ( (ptr->flags.use_udp && type != MEMCACHED_CONNECTION_UDP)
       || ( (type == MEMCACHED_CONNECTION_UDP) && (! ptr->flags.use_udp) ) )
     return MEMCACHED_INVALID_HOST_PROTOCOL;
 
-  new_host_list= ptr->call_realloc(ptr, memcached_server_list(ptr),
-                                   sizeof(memcached_server_instance_st) * (ptr->number_of_hosts + 1));
+  new_host_list= libmemcached_realloc(ptr, memcached_server_list(ptr),
+                                      sizeof(memcached_server_st) * (ptr->number_of_hosts + 1));
 
   if (new_host_list == NULL)
     return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
@@ -431,75 +444,3 @@ static memcached_return_t server_add(memcached_st *ptr, const char *hostname,
 
   return run_distribution(ptr);
 }
-
-memcached_return_t memcached_server_remove(memcached_server_st *st_ptr)
-{
-  uint32_t x, host_index;
-  memcached_st *ptr= st_ptr->root;
-  memcached_server_st *list= memcached_server_list(ptr);
-
-  for (x= 0, host_index= 0; x < memcached_server_count(ptr); x++)
-  {
-    if (strncmp(list[x].hostname, st_ptr->hostname, MEMCACHED_MAX_HOST_LENGTH) != 0 || list[x].port != st_ptr->port)
-    {
-      if (host_index != x)
-        memcpy(list+host_index, list+x, sizeof(memcached_server_st));
-      host_index++;
-    }
-  }
-  ptr->number_of_hosts= host_index;
-
-  if (st_ptr->address_info)
-  {
-    freeaddrinfo(st_ptr->address_info);
-    st_ptr->address_info= NULL;
-  }
-  run_distribution(ptr);
-
-  return MEMCACHED_SUCCESS;
-}
-
-memcached_server_st *memcached_server_list_append(memcached_server_st *ptr,
-                                                  const char *hostname, in_port_t port,
-                                                  memcached_return_t *error)
-{
-  return memcached_server_list_append_with_weight(ptr, hostname, port, 0, error);
-}
-
-memcached_server_st *memcached_server_list_append_with_weight(memcached_server_st *ptr,
-                                                              const char *hostname, in_port_t port,
-                                                              uint32_t weight,
-                                                              memcached_return_t *error)
-{
-  unsigned int count;
-  memcached_server_instance_st *new_host_list;
-
-  if (hostname == NULL || error == NULL)
-    return NULL;
-
-  if (! port)
-    port= MEMCACHED_DEFAULT_PORT;
-
-  /* Increment count for hosts */
-  count= 1;
-  if (ptr != NULL)
-  {
-    count+= memcached_servers_count(ptr);
-  }
-
-  new_host_list= (memcached_server_instance_st *)realloc(ptr, sizeof(memcached_server_instance_st) * count);
-  if (!new_host_list)
-  {
-    *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
-    return NULL;
-  }
-
-  /* TODO: Check return type */
-  memcached_server_create_with(NULL, &new_host_list[count-1], hostname, port, weight, MEMCACHED_CONNECTION_TCP);
-
-  /* Backwards compatibility hack */
-  memcached_servers_set_count(new_host_list, count);
-
-  *error= MEMCACHED_SUCCESS;
-  return new_host_list;
-}