Commit 9c1b3f57 authored by kroki/tomash@moonlight.intranet's avatar kroki/tomash@moonlight.intranet

Merge moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.0

into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.0-bug21051-2
parents 320f8ccc 0f0ddc39
......@@ -209,7 +209,13 @@ typedef struct st_net {
char last_error[MYSQL_ERRMSG_SIZE], sqlstate[SQLSTATE_LENGTH+1];
unsigned int last_errno;
unsigned char error;
/*
'query_cache_query' should be accessed only via query cache
functions and methods to maintain proper locking.
*/
gptr query_cache_query;
my_bool report_error; /* We should report error (we have unreported error) */
my_bool return_errno;
} NET;
......
......@@ -96,8 +96,11 @@ extern uint test_flags;
extern ulong bytes_sent, bytes_received, net_big_packet_count;
extern pthread_mutex_t LOCK_bytes_sent , LOCK_bytes_received;
#ifndef MYSQL_INSTANCE_MANAGER
extern void query_cache_insert(NET *net, const char *packet, ulong length);
#ifdef HAVE_QUERY_CACHE
#define USE_QUERY_CACHE
extern void query_cache_init_query(NET *net);
extern void query_cache_insert(NET *net, const char *packet, ulong length);
#endif // HAVE_QUERY_CACHE
#define update_statistics(A) A
#endif /* MYSQL_INSTANCE_MANGER */
#endif /* defined(MYSQL_SERVER) && !defined(MYSQL_INSTANCE_MANAGER) */
......@@ -133,7 +136,11 @@ my_bool my_net_init(NET *net, Vio* vio)
net->compress=0; net->reading_or_writing=0;
net->where_b = net->remain_in_buf=0;
net->last_errno=0;
net->query_cache_query=0;
#ifdef USE_QUERY_CACHE
query_cache_init_query(net);
#else
net->query_cache_query= 0;
#endif
net->report_error= 0;
if (vio != 0) /* If real connection */
......@@ -552,10 +559,8 @@ net_real_write(NET *net,const char *packet,ulong len)
my_bool net_blocking = vio_is_blocking(net->vio);
DBUG_ENTER("net_real_write");
#if defined(MYSQL_SERVER) && defined(HAVE_QUERY_CACHE) \
&& !defined(MYSQL_INSTANCE_MANAGER)
if (net->query_cache_query != 0)
query_cache_insert(net, packet, len);
#if defined(MYSQL_SERVER) && defined(USE_QUERY_CACHE)
query_cache_insert(net, packet, len);
#endif
if (net->error == 2)
......
This diff is collapsed.
......@@ -195,7 +195,6 @@ extern "C"
byte *query_cache_table_get_key(const byte *record, uint *length,
my_bool not_used);
}
void query_cache_insert(NET *thd, const char *packet, ulong length);
extern "C" void query_cache_invalidate_by_MyISAM_filename(const char* filename);
......@@ -241,6 +240,12 @@ public:
ulong free_memory, queries_in_cache, hits, inserts, refused,
free_memory_blocks, total_blocks, lowmem_prunes;
private:
pthread_cond_t COND_flush_finished;
bool flush_in_progress;
void free_query_internal(Query_cache_block *point);
protected:
/*
The following mutex is locked when searching or changing global
......@@ -249,6 +254,12 @@ protected:
LOCK SEQUENCE (to prevent deadlocks):
1. structure_guard_mutex
2. query block (for operation inside query (query block/results))
Thread doing cache flush releases the mutex once it sets
flush_in_progress flag, so other threads may bypass the cache as
if it is disabled, not waiting for reset to finish. The exception
is other threads that were going to do cache flush---they'll wait
till the end of a flush operation.
*/
pthread_mutex_t structure_guard_mutex;
byte *cache; // cache memory
......@@ -358,6 +369,7 @@ protected:
If query is cacheable return number tables in query
(query without tables not cached)
*/
static
TABLE_COUNTER_TYPE is_cacheable(THD *thd, uint32 query_len, char *query,
LEX *lex, TABLE_LIST *tables_used,
uint8 *tables_type);
......@@ -410,6 +422,7 @@ protected:
void destroy();
friend void query_cache_init_query(NET *net);
friend void query_cache_insert(NET *net, const char *packet, ulong length);
friend void query_cache_end_of_result(THD *thd);
friend void query_cache_abort(NET *net);
......@@ -435,6 +448,8 @@ protected:
extern Query_cache query_cache;
extern TYPELIB query_cache_type_typelib;
void query_cache_init_query(NET *net);
void query_cache_insert(NET *net, const char *packet, ulong length);
void query_cache_end_of_result(THD *thd);
void query_cache_abort(NET *net);
......
......@@ -224,7 +224,7 @@ THD::THD()
#endif
client_capabilities= 0; // minimalistic client
net.last_error[0]=0; // If error on boot
net.query_cache_query=0; // If error on boot
query_cache_init_query(&net); // If error on boot
ull=0;
system_thread= cleanup_done= abort_on_warning= no_warnings_for_error= 0;
peer_port= 0; // For SHOW PROCESSLIST
......
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