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#include "grail-inserter.h"
#include "grail-recognizer.h"
#include <grail.h>
#include <pthread.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <malloc.h>
#include <errno.h>
#include "evbuf.h"
static const pthread_mutex_t c_mutex = PTHREAD_MUTEX_INITIALIZER;
static const pthread_cond_t c_wait = PTHREAD_COND_INITIALIZER;
struct grail_impl {
struct touch_dev dev;
struct touch_engine engine;
struct evbuf evbuf;
int fd;
int pull, finished;
pthread_mutex_t mutex;
pthread_cond_t wait;
pthread_t thread;
};
/*
* While not finished, lock, wait for condition, extract the running
* state, unlock, then process the event queue.
*
* The processing may in principle take seconds to complete without
* locking up the writer side.
*/
static void *grail_thread(void *priv)
{
struct grail_impl *x = priv;
int pull, finished = 0;
sigset_t block;
sigemptyset(&block);
sigaddset(&block, SIGIO);
pthread_sigmask(SIG_BLOCK, &block, NULL);
while (!finished) {
pthread_mutex_lock(&x->mutex);
pthread_cond_wait(&x->wait, &x->mutex);
pull = x->pull;
finished = x->finished;
x->pull = 0;
pthread_mutex_unlock(&x->mutex);
if (!finished && pull)
touch_dev_process(&x->dev);
}
pthread_exit(NULL);
}
static void tp_event(struct touch_engine *engine,
const struct input_event *ev)
{
struct grail *ge = engine->priv;
struct grail_impl *x = ge->impl;
evbuf_put(&x->evbuf, ev);
}
static void tp_sync(struct touch_engine *engine,
const struct input_event *syn)
{
struct input_event ev;
struct grail *ge = engine->priv;
struct grail_impl *x = ge->impl;
struct touch_frame *frame = &engine->frame;
grail_mask_t filtered[DIM_EV_TYPE_BYTES];
int nevent = 0;
gin_frame_begin(ge, frame->time);
gru_recognize(ge, frame);
gin_frame_end(ge, filtered);
if (!ge->event) {
evbuf_clear(&x->evbuf);
return;
}
while (!evbuf_empty(&x->evbuf)) {
evbuf_get(&x->evbuf, &ev);
if (grail_get_mask(filtered, ev.type))
continue;
ge->event(ge, &ev);
nevent++;
}
if (nevent)
ge->event(ge, syn);
}
int grail_open(struct grail *ge, int fd)
{
struct grail_impl *x;
int ret;
x = calloc(1, sizeof(*x));
if (!x)
return -ENOMEM;
ret = gin_init(ge);
if (ret)
goto freemem;
ret = gru_init(ge);
if (ret)
goto freedev;
ret = touch_dev_open(&x->dev, fd);
if (ret)
goto freegru;
x->fd = fd;
x->mutex = c_mutex;
x->wait = c_wait;
ret = pthread_create(&x->thread, NULL, grail_thread, x);
if (ret)
goto freetouch;
ge->impl = x;
touch_engine_init(&x->engine, tp_event, tp_sync, ge);
touch_engine_attach(&x->engine, &x->dev);
return 0;
freetouch:
touch_dev_close(&x->dev, fd);
freegru:
gru_destroy(ge);
freedev:
gin_destroy(ge);
freemem:
free(x);
return ret;
}
void grail_close(struct grail *ge, int fd)
{
struct grail_impl *x = ge->impl;
void *status;
pthread_mutex_lock(&x->mutex);
x->finished = 1;
pthread_cond_signal (&x->wait);
pthread_mutex_unlock(&x->mutex);
touch_engine_detach(&x->engine, &x->dev);
touch_dev_close(&x->dev, fd);
gru_destroy(ge);
gin_destroy(ge);
free(ge->impl);
ge->impl = 0;
}
int grail_idle(struct grail *ge, int fd, int ms)
{
struct grail_impl *x = ge->impl;
int ret;
pthread_mutex_lock(&x->mutex);
ret = touch_dev_idle(&x->dev, fd, ms);
pthread_mutex_unlock(&x->mutex);
return ret;
}
/*
* First extract all input events to a lockless circular buffer, then,
* under lock, signal the worker thread.
*
* This function only blocks temporarily while signalling the worker
* thread.
*/
int grail_pull(struct grail *ge, int fd)
{
struct grail_impl *x = ge->impl;
int finished = touch_dev_fetch(&x->dev, fd) < 0;
pthread_mutex_lock(&x->mutex);
x->pull = 1;
x->finished = finished;
pthread_cond_signal(&x->wait);
pthread_mutex_unlock(&x->mutex);
return 1;
}
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