Merge key cache structures to one

Fixed compiler warnings (IRIX C compiler and VC++)

8 files changed, 172 insertions, 99 deletions

diff --git a/include/hash.h b/include/hash.h
index 3c2ae32c70e..c7cc118b7bd 100644
--- a/include/hash.h
+++ b/include/hash.h
@@ -22,14 +22,15 @@
 extern "C" {
 #endif
 
+/*
+  Overhead to store an element in hash
+  Can be used to approximate memory consumption for a hash
+ */
+#define HASH_OVERHEAD (sizeof(char*)*2)
+
 typedef byte *(*hash_get_key)(const byte *,uint*,my_bool);
 typedef void (*hash_free_key)(void *);
 
-typedef struct st_hash_info {
-  uint next;					/* index to next key */
-  byte *data;					/* data for current entry */
-} HASH_LINK;
-
 typedef struct st_hash {
   uint key_offset,key_length;		/* Length of key if const length */
   uint records,blength,current_record;
diff --git a/include/keycache.h b/include/keycache.h
new file mode 100644
index 00000000000..824c5874ffc
--- /dev/null
+++ b/include/keycache.h
@@ -0,0 +1,134 @@
+/* Copyright (C) 2003 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/* Key cache variable structures */
+
+#ifndef _keycache_h
+#define _keycache_h
+C_MODE_START
+
+/* declare structures that is used by st_key_cache */
+
+struct st_block_link;
+typedef struct st_block_link BLOCK_LINK;
+struct st_keycache_page;
+typedef struct st_keycache_page KEYCACHE_PAGE;
+struct st_hash_link;
+typedef struct st_hash_link HASH_LINK;
+
+/* info about requests in a waiting queue */
+typedef struct st_keycache_wqueue
+{
+  struct st_my_thread_var *last_thread;  /* circular list of waiting threads */
+} KEYCACHE_WQUEUE;
+
+#define CHANGED_BLOCKS_HASH 128             /* must be power of 2 */
+
+/*
+  The key cache structure
+  It also contains read-only statistics parameters.
+*/   
+
+typedef struct st_key_cache
+{
+  my_bool key_cache_inited;
+  uint key_cache_shift;
+  ulong key_cache_mem_size;      /* specified size of the cache memory       */
+  uint key_cache_block_size;     /* size of the page buffer of a cache block */
+  ulong min_warm_blocks;         /* min number of warm blocks;               */
+  ulong age_threshold;           /* age threshold for hot blocks             */
+  ulonglong keycache_time;       /* total number of block link operations    */
+  uint hash_entries;             /* max number of entries in the hash table  */
+  int hash_links;                /* max number of hash links                 */
+  int hash_links_used;           /* number of hash links currently used      */
+  int disk_blocks;               /* max number of blocks in the cache        */
+  ulong blocks_used;             /* number of currently used blocks          */
+  ulong blocks_changed;          /* number of currently dirty blocks         */
+  ulong warm_blocks;             /* number of blocks in warm sub-chain       */
+  long blocks_available;      /* number of blocks available in the LRU chain */
+  HASH_LINK **hash_root;         /* arr. of entries into hash table buckets  */
+  HASH_LINK *hash_link_root;     /* memory for hash table links              */
+  HASH_LINK *free_hash_list;     /* list of free hash links                  */
+  BLOCK_LINK *block_root;        /* memory for block links                   */
+  byte HUGE_PTR *block_mem;      /* memory for block buffers                 */
+  BLOCK_LINK *used_last;         /* ptr to the last block of the LRU chain   */
+  BLOCK_LINK *used_ins;          /* ptr to the insertion block in LRU chain  */
+  pthread_mutex_t cache_lock;    /* to lock access to the cache structure    */
+  KEYCACHE_WQUEUE waiting_for_hash_link; /* waiting for a free hash link     */
+  KEYCACHE_WQUEUE waiting_for_block;    /* requests waiting for a free block */
+  BLOCK_LINK *changed_blocks[CHANGED_BLOCKS_HASH]; /* hash for dirty file bl.*/
+  BLOCK_LINK *file_blocks[CHANGED_BLOCKS_HASH];    /* hash for other file bl.*/
+
+  /*
+    The following variables are and variables used to hold parameters for
+    initializing the key cache.
+  */
+
+  ulonglong param_buff_size;    /* size the memory allocated for the cache  */
+  ulong param_block_size;       /* size of the blocks in the key cache      */
+  ulong param_division_limit;   /* min. percentage of warm blocks           */
+  ulong param_age_threshold;    /* determines when hot block is downgraded  */
+
+  /* Statistics variables */
+  ulong global_blocks_used;	/* number of currently used blocks          */
+  ulong global_blocks_changed;	/* number of currently dirty blocks         */
+  ulong global_cache_w_requests;/* number of write requests (write hits)    */
+  ulong global_cache_write;     /* number of writes from the cache to files */
+  ulong global_cache_r_requests;/* number of read requests (read hits)      */
+  ulong global_cache_read;      /* number of reads from files to the cache  */
+  int blocks;                   /* max number of blocks in the cache        */
+  my_bool in_init;		/* Set to 1 in MySQL during init/resize     */
+
+  /* optional call back function */
+  void (*action)(struct st_key_cache *);
+} KEY_CACHE;
+
+/* The default key cache */
+extern KEY_CACHE dflt_key_cache_var, *dflt_key_cache;
+
+extern int init_key_cache(KEY_CACHE *keycache, uint key_cache_block_size,
+			  ulong use_mem, uint division_limit,
+			  uint age_threshold);
+extern int resize_key_cache(KEY_CACHE *keycache, uint key_cache_block_size,
+			    ulong use_mem, uint division_limit,
+			    uint age_threshold);
+extern void change_key_cache_param(KEY_CACHE *keycache, uint division_limit,
+				   uint age_threshold);
+extern byte *key_cache_read(KEY_CACHE *keycache,
+                            File file, my_off_t filepos, int level,
+                            byte *buff, uint length,
+			    uint block_length,int return_buffer);
+extern int key_cache_insert(KEY_CACHE *keycache,
+                            File file, my_off_t filepos, int level,
+                            byte *buff, uint length);
+extern int key_cache_write(KEY_CACHE *keycache,
+                           File file, my_off_t filepos, int level,
+                           byte *buff, uint length,
+			   uint block_length,int force_write);
+extern int flush_key_blocks(KEY_CACHE *keycache,
+                            int file, enum flush_type type);
+extern void end_key_cache(KEY_CACHE *keycache, my_bool cleanup);
+
+/* Functions to handle multiple key caches */
+extern my_bool multi_keycache_init(void);
+extern void multi_keycache_free(void);
+extern KEY_CACHE *multi_key_cache_search(byte *key, uint length);
+extern my_bool multi_key_cache_set(const byte *key, uint length,
+				   KEY_CACHE *key_cache);
+extern void multi_key_cache_change(KEY_CACHE *old_data,
+				   KEY_CACHE *new_data);
+C_MODE_END
+#endif /* _keycache_h */
diff --git a/include/my_pthread.h b/include/my_pthread.h
index a4ea88b20f0..44e6edcddec 100644
--- a/include/my_pthread.h
+++ b/include/my_pthread.h
@@ -468,7 +468,7 @@ int my_pthread_mutex_trylock(pthread_mutex_t *mutex);
 typedef struct st_safe_mutex_t
 {
   pthread_mutex_t global,mutex;
-  char *file;
+  const char *file;
   uint line,count;
   pthread_t thread;
 #ifdef SAFE_MUTEX_DETECT_DESTROY
@@ -487,7 +487,7 @@ typedef struct st_safe_mutex_info_t
 {
   struct st_safe_mutex_info_t *next;
   struct st_safe_mutex_info_t *prev;
-  char *init_file;
+  const char *init_file;
   uint32 init_line;
 } safe_mutex_info_t;
 #endif /* SAFE_MUTEX_DETECT_DESTROY */
diff --git a/include/my_sys.h b/include/my_sys.h
index d1c7b658665..604eaf34fb7 100644
--- a/include/my_sys.h
+++ b/include/my_sys.h
@@ -505,44 +505,6 @@ my_off_t my_b_append_tell(IO_CACHE* info);
 
 typedef uint32 ha_checksum;
 
-/* Pointer to a key cache data structure (see the key cache module) */
-typedef struct st_key_cache* KEY_CACHE_HANDLE;
-
-/* Key cache variable structure */
-/*
-  The structure contains the parameters of a key cache that can
-  be set and undated by regular set global statements.
-  It also contains read-only statistics parameters.
-  If the corresponding key cache data structure has been already
-  created the variable contains the key cache handle.
-  The variables are put into a named list called key_caches.
-  At present the variables are only added to this list.
-*/   
-typedef struct st_key_cache_var
-{
-  ulonglong buff_size;           /* size the memory allocated for the cache  */
-  ulong block_size;              /* size of the blocks in the key cache      */
-  ulong division_limit;          /* min. percentage of warm blocks           */
-  ulong age_threshold;           /* determines when hot block is downgraded  */
-  KEY_CACHE_HANDLE cache;        /* handles for the current and registered   */
-  ulong blocks_used;             /* number of currently used blocks          */
-  ulong blocks_changed;          /* number of currently dirty blocks         */
-  ulong cache_w_requests;        /* number of write requests (write hits)    */
-  ulong cache_write;             /* number of writes from the cache to files */
-  ulong cache_r_requests;        /* number of read requests (read hits)      */
-  ulong cache_read;              /* number of reads from files to the cache  */
-  int blocks;                    /* max number of blocks in the cache        */
-  my_bool in_init;		 /* Set to 1 in MySQL during init/resize     */
-  struct st_key_cache_asmt *assign_list; /* list of assignments to the cache */
-  int assignments;               /* number of not completed assignments      */
-  void (*action)(void *);        /* optional call back function              */
-  void *extra_info;              /* ptr to extra info                        */
-} KEY_CACHE_VAR;
-
-
-extern KEY_CACHE_HANDLE *dflt_keycache;
-extern KEY_CACHE_VAR dflt_key_cache_var;
-
 #include <my_alloc.h>
 
 	/* Prototypes for mysys and my_func functions */
@@ -682,33 +644,6 @@ extern int flush_write_cache(RECORD_CACHE *info);
 extern long my_clock(void);
 extern sig_handler sigtstp_handler(int signal_number);
 extern void handle_recived_signals(void);
-extern int init_key_cache(KEY_CACHE_HANDLE *pkeycache,
-                          uint key_cache_block_size,
-                          ulong use_mem, KEY_CACHE_VAR* env);
-extern int resize_key_cache(KEY_CACHE_HANDLE *pkeycache,
-                            uint key_cache_block_size, ulong use_mem);
-extern void change_key_cache_param(KEY_CACHE_HANDLE keycache);
-extern byte *key_cache_read(KEY_CACHE_HANDLE keycache,
-                            File file, my_off_t filepos, int level,
-                            byte* buff, uint length,
-			    uint block_length,int return_buffer);
-extern int key_cache_insert(KEY_CACHE_HANDLE keycache,
-                            File file, my_off_t filepos, int level,
-                            byte *buff, uint length);
-extern int key_cache_write(KEY_CACHE_HANDLE keycache,
-                           File file, my_off_t filepos, int level,
-                           byte* buff, uint length,
-			   uint block_length,int force_write);
-extern int flush_key_blocks(KEY_CACHE_HANDLE keycache,
-                            int file, enum flush_type type);
-extern void end_key_cache(KEY_CACHE_HANDLE keycache, my_bool cleanup);
-extern my_bool multi_keycache_init(void);
-extern void multi_keycache_free(void);
-extern KEY_CACHE_HANDLE *multi_key_cache_search(byte *key, uint length);
-extern my_bool multi_key_cache_set(const byte *key, uint length,
-				   KEY_CACHE_HANDLE *key_cache);
-extern void multi_key_cache_change(KEY_CACHE_HANDLE *old_data,
-				   KEY_CACHE_HANDLE *new_data);
 
 extern sig_handler my_set_alarm_variable(int signo);
 extern void my_string_ptr_sort(void *base,uint items,size_s size);
diff --git a/include/myisam.h b/include/myisam.h
index 52f2948aaef..613a9965832 100644
--- a/include/myisam.h
+++ b/include/myisam.h
@@ -28,6 +28,9 @@ extern "C" {
 #ifndef _m_ctype_h
 #include <m_ctype.h>
 #endif
+#ifndef _keycache_h
+#include "keycache.h"
+#endif
 #include "my_handler.h"
 
 	/* defines used by myisam-funktions */
@@ -408,9 +411,9 @@ int mi_init_bulk_insert(MI_INFO *info, ulong cache_size, ha_rows rows);
 void mi_flush_bulk_insert(MI_INFO *info, uint inx);
 void mi_end_bulk_insert(MI_INFO *info);
 int mi_assign_to_key_cache(MI_INFO *info, ulonglong key_map, 
-			   KEY_CACHE_VAR *key_cache);
-void mi_change_key_cache(KEY_CACHE_VAR *old_key_cache,
-			 KEY_CACHE_VAR *new_key_cache);
+			   KEY_CACHE *key_cache);
+void mi_change_key_cache(KEY_CACHE *old_key_cache,
+			 KEY_CACHE *new_key_cache);
 int mi_preload(MI_INFO *info, ulonglong key_map, my_bool ignore_leaves);
 
 #ifdef	__cplusplus
diff --git a/include/mysql.h b/include/mysql.h
index 7df42460c6d..23d89fd531f 100644
--- a/include/mysql.h
+++ b/include/mysql.h
@@ -535,10 +535,10 @@ typedef struct st_mysql_stmt
   char		 *query;	       /* query buffer */
   MEM_ROOT	 mem_root;	       /* root allocations */
   my_ulonglong   last_fetched_column;  /* last fetched column */
-  unsigned long  param_count;	       /* parameters count */
-  unsigned long  field_count;	       /* fields count */
   unsigned long	 stmt_id;	       /* Id for prepared statement */
   unsigned int	 last_errno;	       /* error code */
+  unsigned int   param_count;	       /* parameters count */
+  unsigned int   field_count;	       /* fields count */
   enum PREP_STMT_STATE state;	       /* statement state */
   char		 last_error[MYSQL_ERRMSG_SIZE]; /* error message */
   char		 sqlstate[SQLSTATE_LENGTH+1];
@@ -552,27 +552,27 @@ typedef struct st_mysql_stmt
 
 typedef struct st_mysql_methods
 {
-  my_bool (* STDCALL read_query_result)(MYSQL *mysql);
-  my_bool (* STDCALL advanced_command)(MYSQL *mysql,
-				      enum enum_server_command command,
-				      const char *header,
-				      unsigned long header_length,
-				      const char *arg,
-				      unsigned long arg_length,
-				      my_bool skip_check);
-  MYSQL_DATA *(* STDCALL read_rows)(MYSQL *mysql,MYSQL_FIELD *mysql_fields,
-				   unsigned int fields);
-  MYSQL_RES * (* STDCALL use_result)(MYSQL *mysql);
-  void (* STDCALL fetch_lengths)(unsigned long *to, 
-				MYSQL_ROW column, unsigned int field_count);
+  my_bool (*read_query_result)(MYSQL *mysql);
+  my_bool (*advanced_command)(MYSQL *mysql,
+			      enum enum_server_command command,
+			      const char *header,
+			      unsigned long header_length,
+			      const char *arg,
+			      unsigned long arg_length,
+			      my_bool skip_check);
+  MYSQL_DATA *(*read_rows)(MYSQL *mysql,MYSQL_FIELD *mysql_fields,
+			   unsigned int fields);
+  MYSQL_RES * (*use_result)(MYSQL *mysql);
+  void (*fetch_lengths)(unsigned long *to, 
+			MYSQL_ROW column, unsigned int field_count);
 #if !defined(MYSQL_SERVER) || defined(EMBEDDED_LIBRARY)
-  MYSQL_FIELD * (* STDCALL list_fields)(MYSQL *mysql);
-  my_bool (* STDCALL read_prepare_result)(MYSQL *mysql, MYSQL_STMT *stmt);
-  int (* STDCALL stmt_execute)(MYSQL_STMT *stmt);
-  MYSQL_DATA *(* STDCALL read_binary_rows)(MYSQL_STMT *stmt);
-  int (* STDCALL unbuffered_fetch)(MYSQL *mysql, char **row);
-  void (* STDCALL free_embedded_thd)(MYSQL *mysql);
-  const char *(* STDCALL read_statistic)(MYSQL *mysql);
+  MYSQL_FIELD * (*list_fields)(MYSQL *mysql);
+  my_bool (*read_prepare_result)(MYSQL *mysql, MYSQL_STMT *stmt);
+  int (*stmt_execute)(MYSQL_STMT *stmt);
+  MYSQL_DATA *(*read_binary_rows)(MYSQL_STMT *stmt);
+  int (*unbuffered_fetch)(MYSQL *mysql, char **row);
+  void (*free_embedded_thd)(MYSQL *mysql);
+  const char *(*read_statistic)(MYSQL *mysql);
 #endif
 } MYSQL_METHODS;
 
diff --git a/include/sql_common.h b/include/sql_common.h
index 1f442339c4f..1c374030a55 100644
--- a/include/sql_common.h
+++ b/include/sql_common.h
@@ -34,7 +34,7 @@ void end_server(MYSQL *mysql);
 my_bool mysql_reconnect(MYSQL *mysql);
 void mysql_read_default_options(struct st_mysql_options *options,
 				const char *filename,const char *group);
-my_bool STDCALL
+my_bool
 cli_advanced_command(MYSQL *mysql, enum enum_server_command command,
 		     const char *header, ulong header_length,
 		     const char *arg, ulong arg_length, my_bool skip_check);
diff --git a/include/violite.h b/include/violite.h
index 37c5abbbe67..e8f30288d34 100644
--- a/include/violite.h
+++ b/include/violite.h
@@ -177,7 +177,7 @@ struct st_vio
   void    (*viodelete)(Vio*);
   int     (*vioerrno)(Vio*);
   int     (*read)(Vio*, gptr, int);
-  int     (*write)(Vio*, gptr, int);
+  int     (*write)(Vio*, const gptr, int);
   int     (*vioblocking)(Vio*, my_bool, my_bool *);
   my_bool (*is_blocking)(Vio*);
   int     (*viokeepalive)(Vio*, my_bool);