From: Brian Aker <brian@gaz>
Date: Sat, 16 Jan 2010 02:47:17 +0000 (-0800)
Subject: First pass for performance improvement on _clone() operations.
X-Git-Tag: 0.40~92
X-Git-Url: https://git.m6w6.name/?a=commitdiff_plain;h=720028f73260fa1ff8a1d49c8572de04deadea57;p=m6w6%2Flibmemcached

First pass for performance improvement on _clone() operations.
---

diff --git a/ChangeLog b/ChangeLog
index 50f7cd57..e4c731b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 0.38 
 
+ * memcached_clone() now runs 5 times faster.
+
  * Functions used for callbacks are now given const memcached_st.
 
  * Added MEMCACHED_BEHAVIOR_CORK.
diff --git a/libmemcached/server.c b/libmemcached/server.c
index a3426769..fe62b4e9 100644
--- a/libmemcached/server.c
+++ b/libmemcached/server.c
@@ -14,98 +14,129 @@
 */
 #include "common.h"
 
-static memcached_server_st *_server_create(const memcached_st *memc, memcached_server_st *ptr)
+static inline void _server_init(memcached_server_st *self, const memcached_st *root,
+                                const char *hostname, in_port_t port,
+                                uint32_t weight, memcached_connection_t type)
 {
-  if (ptr == NULL)
+  self->options.sockaddr_inited= false;
+  self->number_of_hosts= 0;
+  self->cursor_active= 0;
+  self->port= port;
+  self->cached_errno= 0;
+  self->fd= -1;
+  self->io_bytes_sent= 0;
+  self->server_failure_counter= 0;
+  self->weight= weight;
+  self->state.is_corked= false;
+  self->major_version= 0;
+  self->micro_version= 0;
+  self->minor_version= 0;
+  self->type= type;
+  self->read_ptr= self->read_buffer;
+  self->cached_server_error= NULL;
+  self->read_buffer_length= 0;
+  self->read_data_length= 0;
+  self->write_buffer_offset= 0;
+  self->address_info= NULL;
+
+  if (root)
   {
-    ptr= (memcached_server_st *)memc->call_calloc(memc, 1, sizeof(memcached_server_st));
+    self->next_retry= root->retry_timeout;
+  }
+  else
+  {
+    self->next_retry= 0;
+  }
+
+  self->root= root;
+  self->limit_maxbytes= 0;
+  strncpy(self->hostname, hostname, MEMCACHED_MAX_HOST_LENGTH - 1);
+}
+
+static memcached_server_st *_server_create(memcached_server_st *self, const memcached_st *memc)
+{
+  if (self == NULL)
+  {
+   self= (memcached_server_st *)memc->call_malloc(memc, sizeof(memcached_server_st));
 
-    if (!ptr)
+    if (! self)
       return NULL; /*  MEMCACHED_MEMORY_ALLOCATION_FAILURE */
 
-    ptr->options.is_allocated= true;
+    self->options.is_allocated= true;
   }
   else
   {
-    memset(ptr, 0, sizeof(memcached_server_st));
+    self->options.is_allocated= false;
   }
 
-  ptr->root= memc;
+  self->options.is_initialized= true;
 
-  return ptr;
+  return self;
 }
 
-memcached_server_st *memcached_server_create_with(const memcached_st *memc, memcached_server_st *host,
+memcached_server_st *memcached_server_create_with(const memcached_st *memc, memcached_server_st *self,
                                                   const char *hostname, in_port_t port,
                                                   uint32_t weight, memcached_connection_t type)
 {
-  host= _server_create(memc, host);
+  self= _server_create(self, memc);
 
-  if (host == NULL)
+  if (self == NULL)
     return NULL;
 
-  strncpy(host->hostname, hostname, MEMCACHED_MAX_HOST_LENGTH - 1);
-  host->root= memc ? memc : NULL;
-  host->port= port;
-  host->weight= weight;
-  host->fd= -1;
-  host->type= type;
-  host->read_ptr= host->read_buffer;
-  host->state.is_corked= 0;
-  if (memc)
-    host->next_retry= memc->retry_timeout;
+  _server_init(self, memc, hostname, port, weight, type);
+
+
   if (type == MEMCACHED_CONNECTION_UDP)
   {
-    host->write_buffer_offset= UDP_DATAGRAM_HEADER_LENGTH;
-    memcached_io_init_udp_header(host, 0);
+    self->write_buffer_offset= UDP_DATAGRAM_HEADER_LENGTH;
+    memcached_io_init_udp_header(self, 0);
   }
 
-  return host;
+  return self;
 }
 
-void memcached_server_free(memcached_server_st *ptr)
+void memcached_server_free(memcached_server_st *self)
 {
-  memcached_quit_server(ptr, 0);
+  memcached_quit_server(self, 0);
 
-  if (ptr->cached_server_error)
-    free(ptr->cached_server_error);
+  if (self->cached_server_error)
+    free(self->cached_server_error);
 
-  if (ptr->address_info)
-    freeaddrinfo(ptr->address_info);
+  if (self->address_info)
+    freeaddrinfo(self->address_info);
 
-
-  if (memcached_is_allocated(ptr))
+  if (memcached_is_allocated(self))
   {
-    ptr->root->call_free(ptr->root, ptr);
+    self->root->call_free(self->root, self);
   }
   else
   {
-    memset(ptr, 0, sizeof(memcached_server_st));
+    self->options.is_initialized= false;
   }
 }
 
 /*
   If we do not have a valid object to clone from, we toss an error.
 */
-memcached_server_st *memcached_server_clone(memcached_server_st *clone, memcached_server_st *ptr)
+memcached_server_st *memcached_server_clone(memcached_server_st *destination,
+                                            const memcached_server_st *source)
 {
-  memcached_server_st *rv= NULL;
-
-  /* We just do a normal create if ptr is missing */
-  if (ptr == NULL)
+  /* We just do a normal create if source is missing */
+  if (source == NULL)
     return NULL;
 
-  rv= memcached_server_create_with(ptr->root, clone,
-                                   ptr->hostname, ptr->port, ptr->weight,
-                                   ptr->type);
-  if (rv != NULL)
+  destination= memcached_server_create_with(source->root, destination,
+                                            source->hostname, source->port, source->weight,
+                                            source->type);
+  if (destination != NULL)
   {
-    rv->cached_errno= ptr->cached_errno;
-    if (ptr->cached_server_error)
-      rv->cached_server_error= strdup(ptr->cached_server_error);
+    destination->cached_errno= source->cached_errno;
+
+    if (source->cached_server_error)
+      destination->cached_server_error= strdup(source->cached_server_error);
   }
 
-  return rv;
+  return destination;
 
 }
 
diff --git a/libmemcached/server.h b/libmemcached/server.h
index 10cf50fd..d1a1cdac 100644
--- a/libmemcached/server.h
+++ b/libmemcached/server.h
@@ -19,6 +19,7 @@ extern "C" {
 struct memcached_server_st {
   struct {
     bool is_allocated:1;
+    bool is_initialized:1;
     bool sockaddr_inited:1;
   } options;
   uint32_t number_of_hosts;
@@ -105,8 +106,8 @@ LIBMEMCACHED_API
 void memcached_server_free(memcached_server_st *ptr);
 
 LIBMEMCACHED_LOCAL
-memcached_server_st *memcached_server_clone(memcached_server_st *clone,
-                                            memcached_server_st *ptr);
+memcached_server_st *memcached_server_clone(memcached_server_st *destination,
+                                            const memcached_server_st *source);
 
 LIBMEMCACHED_API
 memcached_return_t memcached_server_remove(memcached_server_st *st_ptr);
diff --git a/libmemcached/string.h b/libmemcached/string.h
index 39a86773..4fc67cfc 100644
--- a/libmemcached/string.h
+++ b/libmemcached/string.h
@@ -27,10 +27,10 @@ extern "C" {
 */
 
 struct memcached_string_st {
-  memcached_st *root;
   char *end;
   char *string;
   size_t current_size;
+  const memcached_st *root;
   struct {
     bool is_allocated:1;
     bool is_initialized:1;