Jeff Brown 4fe6c3e51b Replace epoll() with poll() and rename PollLoop to Looper.
As part of this change, consolidated and cleaned up the Looper API so
that there are fewer distinctions between the NDK and non-NDK declarations
(no need for two callback types, etc.).

Removed the dependence on specific constants from sys/poll.h such as
POLLIN.  Instead looper.h defines events like LOOPER_EVENT_INPUT for
the events that it supports.  That should help make any future
under-the-hood implementation changes easier.

Fixed a couple of compiler warnings along the way.

Change-Id: I449a7ec780bf061bdd325452f823673e2b39b6ae
2010-09-14 01:59:45 -07:00

156 lines
4.3 KiB
C++

/*
* Copyright (C) 2009 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.
*/
#define LOG_TAG "sensor"
#include <utils/Log.h>
#include <android/looper.h>
#include <android/sensor.h>
#include <utils/RefBase.h>
#include <utils/Looper.h>
#include <utils/Timers.h>
#include <gui/Sensor.h>
#include <gui/SensorManager.h>
#include <gui/SensorEventQueue.h>
#include <poll.h>
using android::sp;
using android::Sensor;
using android::SensorManager;
using android::SensorEventQueue;
using android::String8;
/*****************************************************************************/
ASensorManager* ASensorManager_getInstance()
{
return &SensorManager::getInstance();
}
int ASensorManager_getSensorList(ASensorManager* manager,
ASensorList* list)
{
Sensor const* const* l;
int c = static_cast<SensorManager*>(manager)->getSensorList(&l);
if (list) {
*list = reinterpret_cast<ASensorList>(l);
}
return c;
}
ASensor const* ASensorManager_getDefaultSensor(ASensorManager* manager, int type)
{
return static_cast<SensorManager*>(manager)->getDefaultSensor(type);
}
ASensorEventQueue* ASensorManager_createEventQueue(ASensorManager* manager,
ALooper* looper, int ident, ALooper_callbackFunc callback, void* data)
{
sp<SensorEventQueue> queue =
static_cast<SensorManager*>(manager)->createEventQueue();
if (queue != 0) {
ALooper_addFd(looper, queue->getFd(), ident, ALOOPER_EVENT_INPUT, callback, data);
queue->looper = looper;
queue->incStrong(manager);
}
return static_cast<ASensorEventQueue*>(queue.get());
}
int ASensorManager_destroyEventQueue(ASensorManager* manager,
ASensorEventQueue* inQueue)
{
sp<SensorEventQueue> queue = static_cast<SensorEventQueue*>(inQueue);
ALooper_removeFd(queue->looper, queue->getFd());
queue->decStrong(manager);
return 0;
}
/*****************************************************************************/
int ASensorEventQueue_enableSensor(ASensorEventQueue* queue, ASensor const* sensor)
{
return static_cast<SensorEventQueue*>(queue)->enableSensor(
static_cast<Sensor const*>(sensor));
}
int ASensorEventQueue_disableSensor(ASensorEventQueue* queue, ASensor const* sensor)
{
return static_cast<SensorEventQueue*>(queue)->disableSensor(
static_cast<Sensor const*>(sensor));
}
int ASensorEventQueue_setEventRate(ASensorEventQueue* queue, ASensor const* sensor,
int32_t usec)
{
return static_cast<SensorEventQueue*>(queue)->setEventRate(
static_cast<Sensor const*>(sensor), us2ns(usec));
}
int ASensorEventQueue_hasEvents(ASensorEventQueue* queue)
{
struct pollfd pfd;
pfd.fd = static_cast<SensorEventQueue*>(queue)->getFd();
pfd.events = POLLIN;
pfd.revents = 0;
int nfd = poll(&pfd, 1, 0);
if (nfd < 0)
return -errno;
if (pfd.revents != POLLIN)
return -1;
return (nfd == 0) ? 0 : 1;
}
ssize_t ASensorEventQueue_getEvents(ASensorEventQueue* queue,
ASensorEvent* events, size_t count)
{
return static_cast<SensorEventQueue*>(queue)->read(events, count);
}
/*****************************************************************************/
const char* ASensor_getName(ASensor const* sensor)
{
return static_cast<Sensor const*>(sensor)->getName().string();
}
const char* ASensor_getVendor(ASensor const* sensor)
{
return static_cast<Sensor const*>(sensor)->getVendor().string();
}
int ASensor_getType(ASensor const* sensor)
{
return static_cast<Sensor const*>(sensor)->getType();
}
float ASensor_getResolution(ASensor const* sensor)
{
return static_cast<Sensor const*>(sensor)->getResolution();
}
int ASensor_getMinDelay(ASensor const* sensor)
{
return static_cast<Sensor const*>(sensor)->getMinDelay();
}