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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_EVIL
# include <Evil.h>
#endif
#ifdef BUILD_ASYNC_PRELOAD
# include <pthread.h>
# ifdef __linux__
# include <sys/syscall.h>
# endif
#endif
#include "evas_common.h"
#include "evas_private.h"
#include "Evas.h"
#ifdef BUILD_ASYNC_PRELOAD
static int _threads_max = 0;
typedef struct _Evas_Preload_Pthread_Worker Evas_Preload_Pthread_Worker;
typedef struct _Evas_Preload_Pthread_Data Evas_Preload_Pthread_Data;
typedef void (*_evas_preload_pthread_func)(void *data);
struct _Evas_Preload_Pthread_Worker
{
EINA_INLIST;
_evas_preload_pthread_func func_heavy;
_evas_preload_pthread_func func_end;
_evas_preload_pthread_func func_cancel;
void *data;
Eina_Bool cancel : 1;
};
struct _Evas_Preload_Pthread_Data
{
pthread_t thread;
};
static int _threads_count = 0;
static Evas_Preload_Pthread_Worker *_workers = NULL;
static LK(_mutex);
static void
_evas_preload_thread_end(void *data)
{
Evas_Preload_Pthread_Data *pth = data;
Evas_Preload_Pthread_Data *p = NULL;
if (pthread_join(pth->thread, (void **)&p) == 0) free(p);
else return;
eina_threads_shutdown();
}
static void
_evas_preload_thread_done(void *target __UNUSED__, Evas_Callback_Type type __UNUSED__, void *event_info)
{
Evas_Preload_Pthread_Worker *work = event_info;
if (work->cancel)
{
if (work->func_cancel) work->func_cancel(work->data);
}
else
work->func_end(work->data);
free(work);
}
static void *
_evas_preload_thread_worker(void *data)
{
Evas_Preload_Pthread_Data *pth = data;
Evas_Preload_Pthread_Worker *work;
eina_sched_prio_drop();
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
on_error:
for (;;)
{
LKL(_mutex);
if (!_workers)
{
LKU(_mutex);
break;
}
work = _workers;
_workers = EINA_INLIST_CONTAINER_GET(eina_inlist_remove(EINA_INLIST_GET(_workers),
EINA_INLIST_GET(_workers)),
Evas_Preload_Pthread_Worker);
LKU(_mutex);
if (work->func_heavy) work->func_heavy(work->data);
evas_async_events_put(pth, 0, work, _evas_preload_thread_done);
}
LKL(_mutex);
if (_workers)
{
LKU(_mutex);
goto on_error;
}
_threads_count--;
LKU(_mutex);
// dummy worker to wake things up
work = malloc(sizeof(Evas_Preload_Pthread_Worker));
if (!work) return NULL;
work->data = pth;
work->func_heavy = NULL;
work->func_end = (_evas_preload_pthread_func) _evas_preload_thread_end;
work->func_cancel = NULL;
work->cancel = EINA_FALSE;
evas_async_events_put(pth, 0, work, _evas_preload_thread_done);
return pth;
}
#endif
void
_evas_preload_thread_init(void)
{
#ifdef BUILD_ASYNC_PRELOAD
_threads_max = eina_cpu_count();
if (_threads_max < 1) _threads_max = 1;
LKI(_mutex);
#endif
}
void
_evas_preload_thread_shutdown(void)
{
/* FIXME: If function are still running in the background, should we kill them ? */
#ifdef BUILD_ASYNC_PRELOAD
Evas_Preload_Pthread_Worker *work;
/* Force processing of async events. */
evas_async_events_process();
LKL(_mutex);
while (_workers)
{
work = _workers;
_workers = EINA_INLIST_CONTAINER_GET(eina_inlist_remove(EINA_INLIST_GET(_workers),
EINA_INLIST_GET(_workers)),
Evas_Preload_Pthread_Worker);
if (work->func_cancel) work->func_cancel(work->data);
free(work);
}
LKU(_mutex);
LKD(_mutex);
#endif
}
Evas_Preload_Pthread *
evas_preload_thread_run(void (*func_heavy) (void *data),
void (*func_end) (void *data),
void (*func_cancel) (void *data),
const void *data)
{
#ifdef BUILD_ASYNC_PRELOAD
Evas_Preload_Pthread_Worker *work;
Evas_Preload_Pthread_Data *pth;
work = malloc(sizeof(Evas_Preload_Pthread_Worker));
if (!work)
{
func_cancel((void *)data);
return NULL;
}
work->func_heavy = func_heavy;
work->func_end = func_end;
work->func_cancel = func_cancel;
work->cancel = EINA_FALSE;
work->data = (void *)data;
LKL(_mutex);
_workers = (Evas_Preload_Pthread_Worker *)eina_inlist_append(EINA_INLIST_GET(_workers), EINA_INLIST_GET(work));
if (_threads_count == _threads_max)
{
LKU(_mutex);
return (Evas_Preload_Pthread *)work;
}
LKU(_mutex);
/* One more thread could be created. */
pth = malloc(sizeof(Evas_Preload_Pthread_Data));
if (!pth) goto on_error;
eina_threads_init();
if (pthread_create(&pth->thread, NULL, _evas_preload_thread_worker, pth) == 0)
{
LKL(_mutex);
_threads_count++;
LKU(_mutex);
return (Evas_Preload_Pthread*)work;
}
eina_threads_shutdown();
on_error:
LKL(_mutex);
if (_threads_count == 0)
{
LKU(_mutex);
if (work->func_cancel) work->func_cancel(work->data);
free(work);
return NULL;
}
LKU(_mutex);
return NULL;
#else
/*
If no thread and as we don't want to break app that rely on this
facility, we will lock the interface until we are done.
*/
func_heavy((void *)data);
func_end((void *)data);
return (void *)1;
#endif
}
Eina_Bool
evas_preload_thread_cancel(Evas_Preload_Pthread *thread)
{
#ifdef BUILD_ASYNC_PRELOAD
Evas_Preload_Pthread_Worker *work;
if (!thread) return EINA_TRUE;
LKL(_mutex);
EINA_INLIST_FOREACH(_workers, work)
{
if (work == (Evas_Preload_Pthread_Worker *)thread)
{
_workers = EINA_INLIST_CONTAINER_GET(eina_inlist_remove(EINA_INLIST_GET(_workers),
EINA_INLIST_GET(work)),
Evas_Preload_Pthread_Worker);
LKU(_mutex);
if (work->func_cancel) work->func_cancel(work->data);
free(work);
return EINA_TRUE;
}
}
LKU(_mutex);
/* Delay the destruction */
work = (Evas_Preload_Pthread_Worker *)thread;
work->cancel = EINA_TRUE;
return EINA_FALSE;
#else
return EINA_TRUE;
#endif
}
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