gecko-dev/dom/bluetooth/BluetoothAdapter.cpp

251 lines
7.1 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=40: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "BluetoothAdapter.h"
#include "nsDOMClassInfo.h"
#include "nsDOMEvent.h"
#include "nsThreadUtils.h"
#include "nsXPCOMCIDInternal.h"
#include "mozilla/LazyIdleThread.h"
#include "mozilla/Util.h"
#include <dlfcn.h>
static void
FireEnabled(bool aResult, nsIDOMDOMRequest* aDomRequest)
{
nsCOMPtr<nsIDOMRequestService> rs = do_GetService("@mozilla.org/dom/dom-request-service;1");
if (!rs) {
NS_WARNING("No DOMRequest Service!");
return;
}
mozilla::DebugOnly<nsresult> rv = aResult ?
rs->FireSuccess(aDomRequest, JSVAL_VOID) :
rs->FireError(aDomRequest,
NS_LITERAL_STRING("Bluetooth firmware loading failed"));
NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Bluetooth firmware loading failed");
}
USING_BLUETOOTH_NAMESPACE
static struct BluedroidFunctions {
bool initialized;
bool tried_initialization;
BluedroidFunctions() :
initialized(false),
tried_initialization(false)
{
}
int (* bt_enable)();
int (* bt_disable)();
int (* bt_is_enabled)();
} sBluedroidFunctions;
static bool EnsureBluetoothInit() {
if (sBluedroidFunctions.tried_initialization)
{
return sBluedroidFunctions.initialized;
}
sBluedroidFunctions.initialized = false;
sBluedroidFunctions.tried_initialization = true;
void* handle = dlopen("libbluedroid.so", RTLD_LAZY);
if(!handle) {
NS_ERROR("Failed to open libbluedroid.so, bluetooth cannot run");
return false;
}
sBluedroidFunctions.bt_enable = (int (*)())dlsym(handle, "bt_enable");
if(sBluedroidFunctions.bt_enable == NULL) {
NS_ERROR("Failed to attach bt_enable function");
return false;
}
sBluedroidFunctions.bt_disable = (int (*)())dlsym(handle, "bt_disable");
if(sBluedroidFunctions.bt_disable == NULL) {
NS_ERROR("Failed to attach bt_disable function");
return false;
}
sBluedroidFunctions.bt_is_enabled = (int (*)())dlsym(handle, "bt_is_enabled");
if(sBluedroidFunctions.bt_is_enabled == NULL) {
NS_ERROR("Failed to attach bt_is_enabled function");
return false;
}
sBluedroidFunctions.initialized = true;
return true;
}
class ToggleBtResultTask : public nsRunnable
{
public:
ToggleBtResultTask(nsRefPtr<BluetoothAdapter>& adapterPtr,
nsCOMPtr<nsIDOMDOMRequest>& req,
bool enabled,
bool result)
: mResult(result),
mEnabled(enabled)
{
MOZ_ASSERT(!NS_IsMainThread());
mDOMRequest.swap(req);
mAdapterPtr.swap(adapterPtr);
}
NS_IMETHOD Run()
{
MOZ_ASSERT(NS_IsMainThread());
// Update bt power status to BluetoothAdapter only if loading bluetooth
// firmware succeeds.
if (mResult) {
mAdapterPtr->SetEnabledInternal(mEnabled);
}
FireEnabled(mResult, mDOMRequest);
//mAdapterPtr must be null before returning to prevent the background
//thread from racing to release it during the destruction of this runnable.
mAdapterPtr = nsnull;
mDOMRequest = nsnull;
return NS_OK;
}
private:
nsRefPtr<BluetoothAdapter> mAdapterPtr;
nsCOMPtr<nsIDOMDOMRequest> mDOMRequest;
bool mEnabled;
bool mResult;
};
class ToggleBtTask : public nsRunnable
{
public:
ToggleBtTask(bool enabled, nsIDOMDOMRequest* req, BluetoothAdapter* adapterPtr)
: mEnabled(enabled),
mDOMRequest(req),
mAdapterPtr(adapterPtr)
{
MOZ_ASSERT(NS_IsMainThread());
}
NS_IMETHOD Run()
{
MOZ_ASSERT(!NS_IsMainThread());
bool result;
#ifdef MOZ_WIDGET_GONK
// Platform specific check for gonk until object is divided in
// different implementations per platform. Linux doesn't require
// bluetooth firmware loading, but code should work otherwise.
if(!EnsureBluetoothInit()) {
NS_ERROR("Failed to load bluedroid library.\n");
return NS_ERROR_FAILURE;
}
// return 1 if it's enabled, 0 if it's disabled, and -1 on error
int isEnabled = sBluedroidFunctions.bt_is_enabled();
if ((isEnabled == 1 && mEnabled) || (isEnabled == 0 && !mEnabled)) {
result = true;
} else if (isEnabled < 0) {
result = false;
} else if (mEnabled) {
result = (sBluedroidFunctions.bt_enable() == 0) ? true : false;
} else {
result = (sBluedroidFunctions.bt_disable() == 0) ? true : false;
}
#else
result = true;
NS_WARNING("No bluetooth support in this build configuration, faking a success event instead");
#endif
// Create a result thread and pass it to Main Thread,
nsCOMPtr<nsIRunnable> resultRunnable = new ToggleBtResultTask(mAdapterPtr, mDOMRequest, mEnabled, result);
if (NS_FAILED(NS_DispatchToMainThread(resultRunnable))) {
NS_WARNING("Failed to dispatch to main thread!");
}
return NS_OK;
}
private:
bool mEnabled;
nsRefPtr<BluetoothAdapter> mAdapterPtr;
nsCOMPtr<nsIDOMDOMRequest> mDOMRequest;
};
DOMCI_DATA(BluetoothAdapter, BluetoothAdapter)
NS_IMPL_CYCLE_COLLECTION_CLASS(BluetoothAdapter)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(BluetoothAdapter,
nsDOMEventTargetHelper)
NS_CYCLE_COLLECTION_TRAVERSE_EVENT_HANDLER(enabled)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(BluetoothAdapter,
nsDOMEventTargetHelper)
NS_CYCLE_COLLECTION_UNLINK_EVENT_HANDLER(enabled)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(BluetoothAdapter)
NS_INTERFACE_MAP_ENTRY(nsIDOMBluetoothAdapter)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(BluetoothAdapter)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(BluetoothAdapter, nsDOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(BluetoothAdapter, nsDOMEventTargetHelper)
BluetoothAdapter::BluetoothAdapter(nsPIDOMWindow *aWindow)
{
BindToOwner(aWindow);
}
NS_IMETHODIMP
BluetoothAdapter::SetEnabled(bool aEnabled, nsIDOMDOMRequest** aDomRequest)
{
nsCOMPtr<nsIDOMRequestService> rs = do_GetService("@mozilla.org/dom/dom-request-service;1");
if (!rs) {
NS_ERROR("No DOMRequest Service!");
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDOMDOMRequest> request;
nsresult rv = rs->CreateRequest(GetOwner(), getter_AddRefs(request));
NS_ENSURE_SUCCESS(rv, rv);
if (!mToggleBtThread) {
mToggleBtThread = new LazyIdleThread(15000);
}
nsCOMPtr<nsIRunnable> r = new ToggleBtTask(aEnabled, request, this);
rv = mToggleBtThread->Dispatch(r, NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS(rv, rv);
request.forget(aDomRequest);
return NS_OK;
}
NS_IMETHODIMP
BluetoothAdapter::GetEnabled(bool* aEnabled)
{
*aEnabled = mEnabled;
return NS_OK;
}