int gp_thread_start(gp_thread_creation_callback_t function,
void *data, gp_thread_id *thread)
{
#ifdef FALLBACK_TO_OLD_THREADING_FUNCTIONS
*thread = (gp_thread_id)1;
return gp_create_thread(function, data);
#else
/* Create the magic closure that thread_wrapper gets passed */
HANDLE hThread;
unsigned threadID;
gp_thread_creation_closure *closure =
(gp_thread_creation_closure *)malloc(sizeof(*closure));
if (!closure)
return gs_error_VMerror;
closure->function = function;
closure->data = data;
hThread = (HANDLE)_beginthreadex(NULL, 0, &gp_thread_start_wrapper,
closure, 0, &threadID);
if (hThread == (HANDLE)0)
{
free(closure);
*thread = NULL;
return_error(gs_error_unknownerror);
}
*thread = (gp_thread_id)hThread;
return 0;
#endif
}
int
clist_enable_multi_thread_render(gx_device *dev)
{
int code = -1;
/* We need to test gp_create_thread since we may be on a platform */
/* built without working threads, i.e., using gp_nsync.c dummy */
/* routines. The nosync gp_create_thread returns a -ve error code */
if ((code = gp_create_thread(test_threads, NULL)) < 0 ) {
return code; /* Threads don't work */
}
set_dev_proc(dev, get_bits_rectangle, clist_get_bits_rect_mt);
return 1;
}
static int
clist_start_render_thread(gx_device *dev, int thread_index, int band)
{
gx_device_clist *cldev = (gx_device_clist *)dev;
gx_device_clist_reader *crdev = &cldev->reader;
int code;
crdev->render_threads[thread_index].band = band;
crdev->render_threads[thread_index].status = RENDER_THREAD_BUSY;
/* Finally, fire it up */
code = gp_create_thread(clist_render_thread, &(crdev->render_threads[thread_index]));
return code;
}
