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// Description:
// polls /dev/input/event* for any update.
//
// Modified by Jeff Strunk
// Originally EventMonitor.c from keywatcher
// Copyright (C) 2002-2005 Frank Becker
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 of the License, or (at your option) any later
// version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details
//
#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <linux/input.h>
#include "eventmonitor.h"
extern struct event_data eventData;
pthread_mutex_t activity_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t condition_mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t condition_cond = PTHREAD_COND_INITIALIZER;
void initializeIE(void) {
int j=0;
int i;
int tmpfd;
if (strncmp(eventData.events[0], "", 1) == 0) {
int result;
for (i=0; i<MAX_CHANNELS; i++) {
char devName[128];
snprintf(devName, 127, "/dev/input/event%d",i);
result = access(devName, R_OK);
if (result == 0) {
strncpy(eventData.events[j], devName, 127);
j++;
}
}
strncpy(eventData.events[j], "", 1);
}
i=0;
j=0;
while (strncmp(eventData.events[i], "", 1) != 0) {
tmpfd = open(eventData.events[i], O_RDONLY);
if (tmpfd != -1) {
eventData.channels[j] = tmpfd;
j++;
}
i++;
}
eventData.channels[j] = -1;
}
void cleanupIE(void) {
int i;
for (i=0; eventData.channels[i] != -1; i++) {
close (eventData.channels[i]);
}
}
void *eventMonitor(void *arg) {
int i, maxfd=0, retval;
fd_set eventWatch;
while (1) {
initializeIE();
FD_ZERO(&eventWatch);
for (i=0; eventData.channels[i] != -1; i++) {
FD_SET (eventData.channels[i], &eventWatch);
if (eventData.channels[i] > maxfd)
maxfd = eventData.channels[i];
}
maxfd++;
pthread_mutex_lock(&condition_mutex);
pthread_cond_wait(&condition_cond, &condition_mutex);
pthread_mutex_unlock(&condition_mutex);
pthread_mutex_lock(&activity_mutex);
eventData.emactivity = 0;
pthread_mutex_unlock(&activity_mutex);
retval = select(maxfd, &eventWatch, NULL, NULL, NULL);
if (retval > 0 ) {
pthread_mutex_lock(&activity_mutex);
eventData.emactivity = 1;
pthread_mutex_unlock(&activity_mutex);
}
cleanupIE();
}
pthread_exit(NULL);
}
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