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  • Committer: Brian Aker
  • Date: 2009-01-06 23:40:50 UTC
  • mfrom: (642.1.69 drizzle-clean-code)
  • Revision ID: brian@tangent.org-20090106234050-w01lo5f4r3q62nik
Finished merge for Lee

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drizzled/xid.cc
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#include "config.h"
 
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#include <drizzled/global.h>
 
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#include <stdint.h>
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#include <string.h>
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#include <drizzled/my_hash.h>
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#include <drizzled/xid.h>
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#include "drizzled/internal/my_pthread.h"
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#include "drizzled/charset.h"
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#include "drizzled/global_charset_info.h"
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#include "drizzled/charset_info.h"
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namespace drizzled
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{
 
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XID::XID()
 
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{}
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bool XID::eq(XID *xid)
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{
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{
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  return sizeof(gtrid_length)+sizeof(bqual_length)+gtrid_length+bqual_length;
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}
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/***************************************************************************
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  Handling of XA id cacheing
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***************************************************************************/
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pthread_mutex_t LOCK_xid_cache;
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HASH xid_cache;
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unsigned char *xid_get_hash_key(const unsigned char *, size_t *, bool);
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void xid_free_hash(void *);
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unsigned char *xid_get_hash_key(const unsigned char *ptr, size_t *length,
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                        bool )
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{
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  *length=((XID_STATE*)ptr)->xid.key_length();
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  return ((XID_STATE*)ptr)->xid.key();
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}
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void xid_free_hash(void *ptr)
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{
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  XID_STATE *state= (XID_STATE *)ptr;
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  if (state->in_session == false)
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    delete state;
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}
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bool xid_cache_init()
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{
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  pthread_mutex_init(&LOCK_xid_cache, MY_MUTEX_INIT_FAST);
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  return hash_init(&xid_cache, &my_charset_bin, 100, 0, 0,
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                   xid_get_hash_key, xid_free_hash, 0) != 0;
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}
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void xid_cache_free()
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{
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  if (hash_inited(&xid_cache))
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  {
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    hash_free(&xid_cache);
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    pthread_mutex_destroy(&LOCK_xid_cache);
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  }
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}
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XID_STATE *xid_cache_search(XID *xid)
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{
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  pthread_mutex_lock(&LOCK_xid_cache);
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  XID_STATE *res=(XID_STATE *)hash_search(&xid_cache, xid->key(), xid->key_length());
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  pthread_mutex_unlock(&LOCK_xid_cache);
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  return res;
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}
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bool xid_cache_insert(XID *xid, enum xa_states xa_state)
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{
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  XID_STATE *xs;
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  bool res;
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  pthread_mutex_lock(&LOCK_xid_cache);
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  if (hash_search(&xid_cache, xid->key(), xid->key_length()))
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    res= false;
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  else if ((xs = new XID_STATE) == NULL)
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    res= true;
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  else
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  {
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    xs->xa_state=xa_state;
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    xs->xid.set(xid);
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    xs->in_session=0;
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    res= my_hash_insert(&xid_cache, (unsigned char*)xs);
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  }
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  pthread_mutex_unlock(&LOCK_xid_cache);
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  return res;
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}
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bool xid_cache_insert(XID_STATE *xid_state)
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{
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  pthread_mutex_lock(&LOCK_xid_cache);
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  bool res=my_hash_insert(&xid_cache, (unsigned char*)xid_state);
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  pthread_mutex_unlock(&LOCK_xid_cache);
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  return res;
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}
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void xid_cache_delete(XID_STATE *xid_state)
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{
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  pthread_mutex_lock(&LOCK_xid_cache);
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  hash_delete(&xid_cache, (unsigned char *)xid_state);
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  pthread_mutex_unlock(&LOCK_xid_cache);
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}
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} /* namespace drizzled */