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Viewing changes to mysys/thr_lock.h

  • Committer: Brian Aker
  • Date: 2009-02-20 22:48:37 UTC
  • Revision ID: brian@tangent.org-20090220224837-fw5wrf46n4ru3e6a
First pass of stripping uint

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mysys/thr_lock.h
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#include <mysys/my_pthread.h>
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#include <mysys/my_list.h>
 
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#include <mysys/definitions.h>
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struct st_thr_lock;
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extern uint32_t locks_immediate,locks_waited ;
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extern pthread_mutex_t THR_LOCK_lock;
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enum thr_lock_type { TL_IGNORE=-1,
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                     TL_UNLOCK,                 /* UNLOCK ANY LOCK */
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                     TL_READ,                   /* Read lock */
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                     TL_READ_WITH_SHARED_LOCKS,
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                     /* High prior. than TL_WRITE. Allow concurrent insert */
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                     TL_READ_HIGH_PRIORITY,
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                     /* READ, Don't allow concurrent insert */
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                     TL_READ_NO_INSERT,
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                     /* 
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                        Write lock, but allow other threads to read / write.
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                        Used by BDB tables in MySQL to mark that someone is
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                        reading/writing to the table.
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                      */
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                     TL_WRITE_ALLOW_WRITE,
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                     /*
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                        Write lock, but allow other threads to read.
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                        Used by ALTER TABLE in MySQL to allow readers
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                        to use the table until ALTER TABLE is finished.
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                     */
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                     TL_WRITE_ALLOW_READ,
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                     /*
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                       WRITE lock used by concurrent insert. Will allow
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                       READ, if one could use concurrent insert on table.
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                     */
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                     TL_WRITE_CONCURRENT_INSERT,
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                     /* Write used by INSERT DELAYED.  Allows READ locks */
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                     TL_WRITE_DELAYED,
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                     /* 
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                       parser only! Late bound low_priority flag. 
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                       At open_tables() becomes thd->update_lock_default.
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                     */
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                     TL_WRITE_DEFAULT,
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                     /* WRITE lock that has lower priority than TL_READ */
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                     TL_WRITE_LOW_PRIORITY,
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                     /* Normal WRITE lock */
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                     TL_WRITE,
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                     /* Abort new lock request with an error */
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                     TL_WRITE_ONLY};
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enum enum_thr_lock_result { THR_LOCK_SUCCESS= 0, THR_LOCK_ABORTED= 1,
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                            THR_LOCK_WAIT_TIMEOUT= 2, THR_LOCK_DEADLOCK= 3 };
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extern ulong max_write_lock_count;
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extern ulong table_lock_wait_timeout;
 
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extern uint64_t max_write_lock_count;
 
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extern uint64_t table_lock_wait_timeout;
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extern bool thr_lock_inited;
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extern enum thr_lock_type thr_upgraded_concurrent_insert_lock;
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  void *status_param;                   /* Param to status functions */
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} THR_LOCK_DATA;
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/* A helper type for transactional locking. */
 
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struct st_table_lock_info
 
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{
 
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  enum thr_lock_type lock_type;
 
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  int           lock_timeout;
 
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  bool          lock_transactional;
 
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};
 
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struct st_lock_list {
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  THR_LOCK_DATA *data,**last;
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};