my_bool my_thread_init()
{
struct st_my_thread_var *tmp;
if (!my_thread_global_init_done)
return TRUE; /* cannot proceed with unintialized library */
if (mysys_thread_var())
return FALSE;
#ifdef _MSC_VER
install_sigabrt_handler();
#endif
if (!(tmp= (struct st_my_thread_var *) calloc(1, sizeof(*tmp))))
return TRUE;
mysql_mutex_init(key_my_thread_var_mutex, &tmp->mutex, MY_MUTEX_INIT_FAST);
mysql_cond_init(key_my_thread_var_suspend, &tmp->suspend);
tmp->stack_ends_here= (char*)&tmp +
STACK_DIRECTION * (long)my_thread_stack_size;
mysql_mutex_lock(&THR_LOCK_threads);
tmp->id= ++thread_id;
++THR_thread_count;
mysql_mutex_unlock(&THR_LOCK_threads);
set_mysys_thread_var(tmp);
return FALSE;
}
my_bool my_thread_init(void)
{
struct st_my_thread_var *tmp;
my_bool error=0;
if (!my_thread_global_init_done)
return 1; /* cannot proceed with unintialized library */
#ifdef EXTRA_DEBUG_THREADS
my_message_local(INFORMATION_LEVEL, "my_thread_init(): thread_id: 0x%lx",
(ulong) pthread_self());
#endif
if (_my_thread_var())
{
#ifdef EXTRA_DEBUG_THREADS
my_message_local(WARNING_LEVEL,
"my_thread_init() called more than once in thread 0x%lx",
(long) pthread_self());
#endif
goto end;
}
#ifdef _MSC_VER
install_sigabrt_handler();
#endif
if (!(tmp= (struct st_my_thread_var *) calloc(1, sizeof(*tmp))))
{
error= 1;
goto end;
}
set_mysys_var(tmp);
tmp->pthread_self= pthread_self();
mysql_mutex_init(key_my_thread_var_mutex, &tmp->mutex, MY_MUTEX_INIT_FAST);
mysql_cond_init(key_my_thread_var_suspend, &tmp->suspend, NULL);
tmp->stack_ends_here= (char*)&tmp +
STACK_DIRECTION * (long)my_thread_stack_size;
mysql_mutex_lock(&THR_LOCK_threads);
tmp->id= ++thread_id;
++THR_thread_count;
mysql_mutex_unlock(&THR_LOCK_threads);
tmp->init= 1;
#ifndef DBUG_OFF
/* Generate unique name for thread */
(void) my_thread_name();
#endif
end:
return error;
}
my_bool my_thread_global_init(void)
{
int pth_ret;
if (my_thread_global_init_done)
return 0;
my_thread_global_init_done= 1;
#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
/*
Set mutex type to "fast" a.k.a "adaptive"
In this case the thread may steal the mutex from some other thread
that is waiting for the same mutex. This will save us some
context switches but may cause a thread to 'starve forever' while
waiting for the mutex (not likely if the code within the mutex is
short).
*/
pthread_mutexattr_init(&my_fast_mutexattr);
pthread_mutexattr_settype(&my_fast_mutexattr,
PTHREAD_MUTEX_ADAPTIVE_NP);
#endif
#ifdef PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
/*
Set mutex type to "errorcheck"
*/
pthread_mutexattr_init(&my_errorcheck_mutexattr);
pthread_mutexattr_settype(&my_errorcheck_mutexattr,
PTHREAD_MUTEX_ERRORCHECK);
#endif
DBUG_ASSERT(! THR_KEY_mysys_initialized);
if ((pth_ret= my_create_thread_local_key(&THR_KEY_mysys, NULL)) != 0)
{ /* purecov: begin inspected */
my_message_local(ERROR_LEVEL, "Can't initialize threads: error %d",
pth_ret);
/* purecov: end */
return 1;
}
THR_KEY_mysys_initialized= TRUE;
mysql_mutex_init(key_THR_LOCK_malloc, &THR_LOCK_malloc, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_THR_LOCK_open, &THR_LOCK_open, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_THR_LOCK_charset, &THR_LOCK_charset, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_THR_LOCK_threads, &THR_LOCK_threads, MY_MUTEX_INIT_FAST);
if (my_thread_init())
return 1;
mysql_mutex_init(key_THR_LOCK_lock, &THR_LOCK_lock, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_THR_LOCK_myisam, &THR_LOCK_myisam, MY_MUTEX_INIT_SLOW);
mysql_mutex_init(key_THR_LOCK_myisam_mmap, &THR_LOCK_myisam_mmap, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_THR_LOCK_heap, &THR_LOCK_heap, MY_MUTEX_INIT_FAST);
mysql_mutex_init(key_THR_LOCK_net, &THR_LOCK_net, MY_MUTEX_INIT_FAST);
mysql_cond_init(key_THR_COND_threads, &THR_COND_threads);
#ifdef _MSC_VER
install_sigabrt_handler();
#endif
return 0;
}
