+/* 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>
in_port_t port,
uint32_t weight,
memcached_connection_t type);
-memcached_return_t update_continuum(memcached_st *ptr);
+
+static memcached_return_t update_continuum(memcached_st *ptr);
static int compare_servers(const void *p1, const void *p2)
{
int return_value;
- memcached_server_st *a= (memcached_server_st *)p1;
- memcached_server_st *b= (memcached_server_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);
static void sort_hosts(memcached_st *ptr)
{
- if (ptr->number_of_hosts)
+ if (memcached_server_count(ptr))
{
- qsort(ptr->hosts, ptr->number_of_hosts, sizeof(memcached_server_st), compare_servers);
- ptr->hosts[0].count= (uint16_t) ptr->number_of_hosts;
+ memcached_server_write_instance_st instance;
+
+ 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);
}
}
memcached_return_t run_distribution(memcached_st *ptr)
{
+ if (ptr->flags.use_sort_hosts)
+ sort_hosts(ptr);
+
switch (ptr->distribution)
{
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_MODULA:
- if (ptr->flags.use_sort_hosts)
- sort_hosts(ptr);
break;
case MEMCACHED_DISTRIBUTION_RANDOM:
srandom((uint32_t) time(NULL));
WATCHPOINT_ASSERT(0); /* We have added a distribution without extending the logic */
}
- ptr->last_disconnected_server = NULL;
-
return MEMCACHED_SUCCESS;
}
-void server_list_free(memcached_st *ptr, memcached_server_st *servers)
-{
- unsigned int x;
-
- if (servers == NULL)
- return;
-
- for (x= 0; x < servers->count; x++)
- if (servers[x].address_info)
- {
- freeaddrinfo(servers[x].address_info);
- servers[x].address_info= NULL;
- }
-
- if (ptr)
- ptr->call_free(ptr, servers);
- else
- free(servers);
-}
-
-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)
return -1;
}
-memcached_return_t update_continuum(memcached_st *ptr)
+static memcached_return_t update_continuum(memcached_st *ptr)
{
uint32_t host_index;
uint32_t continuum_index= 0;
if (gettimeofday(&now, NULL) != 0)
{
- ptr->cached_errno = errno;
+ memcached_set_errno(ptr, errno, NULL);
return MEMCACHED_ERRNO;
}
- list = ptr->hosts;
+ 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);
+ 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 < ptr->number_of_hosts; ++host_index)
+ ptr->ketama.next_distribution_rebuild= 0;
+ for (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;
}
}
}
else
- live_servers= ptr->number_of_hosts;
+ {
+ 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);
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;
}
if (is_ketama_weighted)
{
- for (host_index = 0; host_index < ptr->number_of_hosts; ++host_index)
+ for (host_index = 0; host_index < memcached_server_count(ptr); ++host_index)
{
if (list[host_index].weight == 0)
{
list[host_index].weight = 1;
}
- if (!is_auto_ejecting || list[host_index].next_retry <= now.tv_sec)
+ if (! is_auto_ejecting || list[host_index].next_retry <= now.tv_sec)
total_weight += list[host_index].weight;
}
}
- for (host_index = 0; host_index < ptr->number_of_hosts; ++host_index)
+ for (host_index= 0; host_index < memcached_server_count(ptr); ++host_index)
{
if (is_auto_ejecting && list[host_index].next_retry > now.tv_sec)
continue;
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
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;
+ 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;
+ 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;
}
}
}
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-%d",
- 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:%d-%d",
- list[host_index].hostname,
- 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;
+ 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;
+ 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;
}
}
}
WATCHPOINT_ASSERT(ptr);
WATCHPOINT_ASSERT(ptr->continuum);
- WATCHPOINT_ASSERT(ptr->number_of_hosts * 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);
+ WATCHPOINT_ASSERT(memcached_server_count(ptr) * MEMCACHED_POINTS_PER_SERVER <= MEMCACHED_CONTINUUM_SIZE);
+ 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; ptr->number_of_hosts && pointer_index < ((live_servers * MEMCACHED_POINTS_PER_SERVER) - 1); pointer_index++)
+ for (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);
}
}
-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)
{
- unsigned int x;
- uint16_t count;
+ uint32_t count;
memcached_server_st *new_host_list;
- if (!list)
+ if (! list)
return MEMCACHED_SUCCESS;
- count= list[0].count;
- new_host_list= ptr->call_realloc(ptr, ptr->hosts,
- sizeof(memcached_server_st) * (count + ptr->number_of_hosts));
+ 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)
+ if (! new_host_list)
return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
- ptr->hosts= new_host_list;
+ memcached_server_list_set(ptr, new_host_list);
- for (x= 0; x < count; x++)
+ for (uint32_t x= 0; x < count; x++)
{
+ 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);
- memcached_server_create(ptr, &ptr->hosts[ptr->number_of_hosts]);
+
+ instance= memcached_server_instance_fetch(ptr, memcached_server_count(ptr));
+
/* TODO check return type */
- (void)memcached_server_create_with(ptr, &ptr->hosts[ptr->number_of_hosts], list[x].hostname,
+ (void)memcached_server_create_with(ptr, instance, list[x].hostname,
list[x].port, list[x].weight, list[x].type);
ptr->number_of_hosts++;
}
- ptr->hosts[0].count= (uint16_t) ptr->number_of_hosts;
+
+ // Provides backwards compatibility with server list.
+ {
+ memcached_server_write_instance_st instance;
+ instance= memcached_server_instance_fetch(ptr, 0);
+ instance->number_of_hosts= memcached_server_count(ptr);
+ }
return run_distribution(ptr);
}
const char *filename,
uint32_t weight)
{
- if (!filename)
+ if (! filename)
return MEMCACHED_FAILURE;
return server_add(ptr, filename, 0, weight, MEMCACHED_CONNECTION_UNIX_SOCKET);
in_port_t port,
uint32_t weight)
{
- if (!port)
+ if (! port)
port= MEMCACHED_DEFAULT_PORT;
- if (!hostname)
+ if (! hostname)
hostname= "localhost";
return server_add(ptr, hostname, port, weight, MEMCACHED_CONNECTION_UDP);
in_port_t port,
uint32_t weight)
{
- if (!port)
+ if (! port)
port= MEMCACHED_DEFAULT_PORT;
- if (!hostname)
+ if (! hostname)
hostname= "localhost";
return server_add(ptr, hostname, port, weight, MEMCACHED_CONNECTION_TCP);
memcached_connection_t type)
{
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, ptr->hosts,
- sizeof(memcached_server_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;
- ptr->hosts= new_host_list;
+ memcached_server_list_set(ptr, new_host_list);
/* TODO: Check return type */
- (void)memcached_server_create_with(ptr, &ptr->hosts[ptr->number_of_hosts], hostname, port, weight, type);
+ instance= memcached_server_instance_fetch(ptr, memcached_server_count(ptr));
+ (void)memcached_server_create_with(ptr, instance, hostname, port, weight, type);
ptr->number_of_hosts++;
- ptr->hosts[0].count= (uint16_t) ptr->number_of_hosts;
-
- 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= ptr->hosts;
-
- for (x= 0, host_index= 0; x < ptr->number_of_hosts; 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_st *new_host_list;
-
- if (hostname == NULL || error == NULL)
- return NULL;
+ instance= memcached_server_instance_fetch(ptr, 0);
+ memcached_servers_set_count(instance, memcached_server_count(ptr));
- if (!port)
- port= MEMCACHED_DEFAULT_PORT;
-
- /* Increment count for hosts */
- count= 1;
- if (ptr != NULL)
- {
- count+= ptr[0].count;
- }
-
- new_host_list= (memcached_server_st *)realloc(ptr, sizeof(memcached_server_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 */
- new_host_list[0].count= (uint16_t) count;
-
- *error= MEMCACHED_SUCCESS;
- return new_host_list;
+ return run_distribution(ptr);
}
-unsigned int memcached_server_list_count(memcached_server_st *ptr)
+memcached_return_t memcached_server_add_parsed(memcached_st *ptr,
+ const char *hostname,
+ size_t hostname_length,
+ in_port_t port,
+ uint32_t weight)
{
- if (ptr == NULL)
- return 0;
+ char buffer[NI_MAXHOST];
- return ptr[0].count;
-}
+ memcpy(buffer, hostname, hostname_length);
+ buffer[hostname_length]= 0;
-void memcached_server_list_free(memcached_server_st *ptr)
-{
- server_list_free(NULL, ptr);
+ return server_add(ptr, buffer,
+ port,
+ weight,
+ MEMCACHED_CONNECTION_TCP);
}
projects / m6w6 / libmemcached / blobdiff