Remove thread code

The primary usecase of grail involves using it together with the
xserver, which is not threaded. Revert the touch-dev code back to
the state prior to adding the threaded processing. Deferred event
handling can be implemented by other means when needed.

Signed-off-by: Henrik Rydberg <rydberg@bitmath.org>

1 files changed, 2 insertions, 68 deletions

diff --git a/src/grail-api.c b/src/grail-api.c
index 2c6c438..9ceb1e7 100644
--- a/src/grail-api.c
+++ b/src/grail-api.c
@@ -1,8 +1,6 @@
 #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>
@@ -11,48 +9,12 @@
 #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;
-                if (!finished && pull)
-                        touch_dev_process(&x->dev);
-                pthread_mutex_unlock(&x->mutex);
-        }
-        pthread_exit(NULL);
-}
-
 static void tp_event(struct touch_engine *engine,
                      const struct input_event *ev)
 {
@@ -105,17 +67,9 @@ int grail_open(struct grail *ge, int fd)
         ret = gru_init(ge);
         if (ret)
                 goto freedev;
-        x->fd = fd;
-        x->mutex = c_mutex;
-        x->wait = c_wait;
-        ret = pthread_create(&x->thread, NULL, grail_thread, x);
-        if (ret)
-                goto freegru;
         touch_engine_init(&x->engine, tp_event, tp_sync, ge);
         touch_engine_attach(&x->engine, &x->dev);
         return 0;
- freegru:
-        gru_destroy(ge);
  freedev:
         touch_dev_close(&x->dev, fd);
  freegin:
@@ -130,10 +84,6 @@ 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);
         gru_destroy(ge);
         touch_dev_close(&x->dev, fd);
@@ -145,29 +95,13 @@ void grail_close(struct grail *ge, int fd)
 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;
+        return touch_dev_idle(&x->dev, fd, ms);
 }
 
-/*
- * 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;
-        pthread_mutex_lock(&x->mutex);
-        x->pull = 1;
-        x->finished = touch_dev_fetch(&x->dev, fd) < 0;
-        pthread_cond_signal(&x->wait);
-        pthread_mutex_unlock(&x->mutex);
-        return 1;
+        return touch_dev_pull(&x->dev, fd);
 }
 
 void grail_get_units(struct grail_coord *min, struct grail_coord *max,