#include <mach/mach.h>
#include <mach/cthreads.h>
#include <objc/thr.h>
#include "runtime.h"
static int __mach_get_max_thread_priority(cthread_t t, int *base)
{
thread_t threadP;
kern_return_t error;
struct thread_sched_info info;
unsigned int info_count=THREAD_SCHED_INFO_COUNT;
if (t == NULL)
return -1;
threadP = cthread_thread(t);
error=thread_info(threadP, THREAD_SCHED_INFO,
(thread_info_t)&info, &info_count);
if (error != KERN_SUCCESS)
return -1;
if (base != NULL)
*base = info.base_priority;
return info.max_priority;
}
int
__objc_init_thread_system(void)
{
return 0;
}
int
__objc_close_thread_system(void)
{
return 0;
}
objc_thread_t
__objc_thread_detach(void (*func)(void *arg), void *arg)
{
objc_thread_t thread_id;
cthread_t new_thread_handle;
new_thread_handle = cthread_fork((cthread_fn_t)func, arg);
if(new_thread_handle)
{
thread_id = *(objc_thread_t *)&new_thread_handle;
cthread_detach(new_thread_handle);
}
else
thread_id = NULL;
return thread_id;
}
int
__objc_thread_set_priority(int priority)
{
objc_thread_t *t = objc_thread_id();
cthread_t cT = (cthread_t) t;
int maxPriority = __mach_get_max_thread_priority(cT, NULL);
int sys_priority = 0;
if (maxPriority == -1)
return -1;
switch (priority)
{
case OBJC_THREAD_INTERACTIVE_PRIORITY:
sys_priority = maxPriority;
break;
case OBJC_THREAD_BACKGROUND_PRIORITY:
sys_priority = (maxPriority * 2) / 3;
break;
case OBJC_THREAD_LOW_PRIORITY:
sys_priority = maxPriority / 3;
break;
default:
return -1;
}
if (sys_priority == 0)
return -1;
if (cthread_priority(cT, sys_priority, 0) == KERN_SUCCESS)
return 0;
else
return -1;
}
int
__objc_thread_get_priority(void)
{
objc_thread_t *t = objc_thread_id();
cthread_t cT = (cthread_t) t;
int basePriority;
int maxPriority;
int sys_priority = 0;
int interactiveT, backgroundT, lowT;
maxPriority = __mach_get_max_thread_priority(cT, &basePriority);
if(maxPriority == -1)
return -1;
if (basePriority > ( (maxPriority * 2) / 3))
return OBJC_THREAD_INTERACTIVE_PRIORITY;
if (basePriority > ( maxPriority / 3))
return OBJC_THREAD_BACKGROUND_PRIORITY;
return OBJC_THREAD_LOW_PRIORITY;
}
void
__objc_thread_yield(void)
{
cthread_yield();
}
int
__objc_thread_exit(void)
{
cthread_exit(&__objc_thread_exit_status);
return -1;
}
objc_thread_t
__objc_thread_id(void)
{
cthread_t self = cthread_self();
return *(objc_thread_t *)&self;
}
int
__objc_thread_set_data(void *value)
{
cthread_set_data(cthread_self(), (any_t) value);
return 0;
}
void *
__objc_thread_get_data(void)
{
return (void *) cthread_data(cthread_self());
}
int
__objc_mutex_allocate(objc_mutex_t mutex)
{
int err = 0;
mutex->backend = objc_malloc(sizeof(struct mutex));
err = mutex_init((mutex_t)(mutex->backend));
if (err != 0)
{
objc_free(mutex->backend);
return -1;
}
else
return 0;
}
int
__objc_mutex_deallocate(objc_mutex_t mutex)
{
mutex_clear((mutex_t)(mutex->backend));
objc_free(mutex->backend);
mutex->backend = NULL;
return 0;
}
int
__objc_mutex_lock(objc_mutex_t mutex)
{
mutex_lock((mutex_t)(mutex->backend));
return 0;
}
int
__objc_mutex_trylock(objc_mutex_t mutex)
{
if (mutex_try_lock((mutex_t)(mutex->backend)) == 0)
return -1;
else
return 0;
}
int
__objc_mutex_unlock(objc_mutex_t mutex)
{
mutex_unlock((mutex_t)(mutex->backend));
return 0;
}
int
__objc_condition_allocate(objc_condition_t condition)
{
condition->backend = objc_malloc(sizeof(struct condition));
condition_init((condition_t)(condition->backend));
return 0;
}
int
__objc_condition_deallocate(objc_condition_t condition)
{
condition_clear((condition_t)(condition->backend));
objc_free(condition->backend);
condition->backend = NULL;
return 0;
}
int
__objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
{
condition_wait((condition_t)(condition->backend),
(mutex_t)(mutex->backend));
return 0;
}
int
__objc_condition_broadcast(objc_condition_t condition)
{
condition_broadcast((condition_t)(condition->backend));
return 0;
}
int
__objc_condition_signal(objc_condition_t condition)
{
condition_signal((condition_t)(condition->backend));
return 0;
}