Portability fixes.

Don't free memory from InnoDB at exit (as this may be done before other threads are finnished)

include/my_pthread.h

@@ -522,11 +522,13 @@ typedef struct _my_rw_lock_t {
 #define rw_unlock(A) my_rw_unlock((A))
 #define rwlock_destroy(A) my_rwlock_destroy((A))
 
-extern	int	my_rwlock_init( my_rw_lock_t *, void * );
-extern	int	my_rwlock_destroy( my_rw_lock_t * );
-extern	int	my_rw_rdlock( my_rw_lock_t * );
-extern	int	my_rw_wrlock( my_rw_lock_t * );
-extern	int	my_rw_unlock( my_rw_lock_t * );
+extern int my_rwlock_init(my_rw_lock_t *, void *);
+extern int my_rwlock_destroy(my_rw_lock_t *);
+extern int my_rw_rdlock(my_rw_lock_t *);
+extern int my_rw_wrlock(my_rw_lock_t *);
+extern int my_rw_unlock(my_rw_lock_t *);
+extern int my_rw_tryrdlock(my_rw_lock_t *);
+extern int my_rw_trywrlock(my_rw_lock_t *);
 #endif /* USE_MUTEX_INSTEAD_OF_RW_LOCKS */
 
 #define GETHOSTBYADDR_BUFF_SIZE 2048

innobase/srv/srv0start.c

@@ -1351,7 +1351,8 @@ innobase_shutdown_for_mysql(void)
 		srv_conc_n_threads);
 	}
 	
+#ifdef NOT_WORKING_YET
 	ut_free_all_mem();
-	
+#endif	
 	return((int) DB_SUCCESS);
 }

mysys/mf_iocache.c

@@ -468,8 +468,10 @@ static int lock_io_cache(IO_CACHE *info)
     very beginning, that is returns 1 and does not unlock the mutex.
   */
   if (++(info->share->count))
-    return pthread_mutex_unlock(&info->share->mutex);
-  else
+  {
+    pthread_mutex_unlock(&info->share->mutex);
+    return 0;
+  }
   return 1;
 }
 
@@ -479,6 +481,7 @@ static void unlock_io_cache(IO_CACHE *info)
   pthread_mutex_unlock(&info->share->mutex);
 }
 
+
 /*
   Read from IO_CACHE when it is shared between several threads.
   It works as follows: when a thread tries to read from a file
@@ -488,6 +491,7 @@ static void unlock_io_cache(IO_CACHE *info)
   returns 1, the thread does actual IO and unlock_io_cache(),
   which signals all the waiting threads that data is in the buffer.
 */
+
 int _my_b_read_r(register IO_CACHE *info, byte *Buffer, uint Count)
 {
   my_off_t pos_in_file;
@@ -1068,7 +1072,8 @@ int _flush_io_cache(IO_CACHE *info, int need_append_buffer_lock)
     if ((length=(uint) (info->write_pos - info->write_buffer)))
     {
       pos_in_file=info->pos_in_file;
-      /* if we have append cache, we always open the file with
+      /*
+	If we have append cache, we always open the file with
 	O_APPEND which moves the pos to EOF automatically on every write
       */
       if (!append_cache && info->seek_not_done)