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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/un.h>
#define LOG_TAG "WifiStatusPoller"
#include <cutils/log.h>
#include "WifiStatusPoller.h"
#include "IWifiStatusPollerHandler.h"
WifiStatusPoller::WifiStatusPoller(IWifiStatusPollerHandler *handler) :
mHandlers(handler) {
mPollingInterval = 5;
mStarted = false;
}
int WifiStatusPoller::start() {
if (pipe(mCtrlPipe))
return -1;
if (pthread_create(&mThread, NULL, WifiStatusPoller::threadStart, this))
return -1;
return 0;
}
int WifiStatusPoller::stop() {
char c = 0;
if (write(mCtrlPipe[1], &c, 1) != 1) {
LOGE("Error writing to control pipe (%s)", strerror(errno));
return -1;
}
void *ret;
if (pthread_join(mThread, &ret)) {
LOGE("Error joining to listener thread (%s)", strerror(errno));
return -1;
}
close(mCtrlPipe[0]);
close(mCtrlPipe[1]);
return 0;
}
void *WifiStatusPoller::threadStart(void *obj) {
WifiStatusPoller *me = reinterpret_cast<WifiStatusPoller *>(obj);
me->mStarted = true;
LOGD("Starting");
me->run();
me->mStarted = false;
LOGD("Stopping");
pthread_exit(NULL);
return NULL;
}
void WifiStatusPoller::run() {
while(1) {
struct timeval to;
fd_set read_fds;
int rc = 0;
int max = 0;
FD_ZERO(&read_fds);
to.tv_usec = 0;
to.tv_sec = mPollingInterval;
FD_SET(mCtrlPipe[0], &read_fds);
max = mCtrlPipe[0];
if ((rc = select(max + 1, &read_fds, NULL, NULL, &to)) < 0) {
LOGE("select failed (%s)", strerror(errno));
sleep(1);
continue;
} else if (!rc) {
mHandlers->onStatusPollInterval();
}
if (FD_ISSET(mCtrlPipe[0], &read_fds))
break;
}
}
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