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/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 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 "DBusHelpers.h"
#include "mozilla/ipc/DBusMessageRefPtr.h"
#include "mozilla/ipc/DBusPendingCallRefPtr.h"
#include "mozilla/ipc/DBusWatcher.h"
#include "mozilla/RefPtr.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/Unused.h"
#include "nsThreadUtils.h"
#undef CHROMIUM_LOG
#define CHROMIUM_LOG(args...) printf(args);
namespace mozilla {
namespace ipc {
//
// DBus I/O
//
namespace {
class Notification final
{
public:
Notification(DBusReplyCallback aCallback, void* aData)
: mCallback(aCallback)
, mData(aData)
{ }
// Callback function for DBus replies. Only run it on I/O thread.
//
static void Handle(DBusPendingCall* aCall, void* aData)
{
MOZ_ASSERT(!NS_IsMainThread());
RefPtr<DBusPendingCall> call = already_AddRefed<DBusPendingCall>(aCall);
UniquePtr<Notification> ntfn(static_cast<Notification*>(aData));
RefPtr<DBusMessage> reply = already_AddRefed<DBusMessage>(
dbus_pending_call_steal_reply(call));
// The reply can be null if the timeout has been reached.
if (reply) {
ntfn->RunCallback(reply);
}
dbus_pending_call_cancel(call);
}
private:
void RunCallback(DBusMessage* aMessage)
{
if (mCallback) {
mCallback(aMessage, mData);
}
}
DBusReplyCallback mCallback;
void* mData;
};
static already_AddRefed<DBusMessage>
BuildDBusMessage(const char* aDestination,
const char* aPath,
const char* aIntf,
const char* aFunc,
int aFirstArgType,
va_list aArgs)
{
RefPtr<DBusMessage> msg = already_AddRefed<DBusMessage>(
dbus_message_new_method_call(aDestination, aPath, aIntf, aFunc));
if (!msg) {
CHROMIUM_LOG("dbus_message_new_method_call failed");
return nullptr;
}
auto success = dbus_message_append_args_valist(msg, aFirstArgType, aArgs);
if (!success) {
CHROMIUM_LOG("dbus_message_append_args_valist failed");
return nullptr;
}
return msg.forget();
}
} // anonymous namespace
nsresult
DBusWatchConnection(DBusConnection* aConnection)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aConnection);
auto success =
dbus_connection_set_watch_functions(aConnection,
DBusWatcher::AddWatchFunction,
DBusWatcher::RemoveWatchFunction,
DBusWatcher::ToggleWatchFunction,
aConnection, nullptr);
if (!success) {
CHROMIUM_LOG("dbus_connection_set_watch_functions failed");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
void
DBusUnwatchConnection(DBusConnection* aConnection)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aConnection);
auto success = dbus_connection_set_watch_functions(aConnection,
nullptr, nullptr, nullptr,
nullptr, nullptr);
if (!success) {
CHROMIUM_LOG("dbus_connection_set_watch_functions failed");
}
}
nsresult
DBusSendMessage(DBusConnection* aConnection, DBusMessage* aMessage)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aConnection);
MOZ_ASSERT(aMessage);
auto success = dbus_connection_send(aConnection, aMessage, nullptr);
if (!success) {
CHROMIUM_LOG("dbus_connection_send failed");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult
DBusSendMessageWithReply(DBusConnection* aConnection,
DBusReplyCallback aCallback, void* aData,
int aTimeout,
DBusMessage* aMessage)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aConnection);
MOZ_ASSERT(aMessage);
UniquePtr<Notification> ntfn = MakeUnique<Notification>(aCallback, aData);
auto call = static_cast<DBusPendingCall*>(nullptr);
auto success = dbus_connection_send_with_reply(aConnection,
aMessage,
&call,
aTimeout);
if (!success) {
CHROMIUM_LOG("dbus_connection_send_with_reply failed");
return NS_ERROR_FAILURE;
}
success = dbus_pending_call_set_notify(call, Notification::Handle,
ntfn.get(), nullptr);
if (!success) {
CHROMIUM_LOG("dbus_pending_call_set_notify failed");
return NS_ERROR_FAILURE;
}
Unused << ntfn.release(); // Picked up in |Notification::Handle|
return NS_OK;
}
nsresult
DBusSendMessageWithReply(DBusConnection* aConnection,
DBusReplyCallback aCallback,
void* aData,
int aTimeout,
const char* aDestination,
const char* aPath,
const char* aIntf,
const char* aFunc,
int aFirstArgType,
va_list aArgs)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aConnection);
RefPtr<DBusMessage> msg =
BuildDBusMessage(aDestination, aPath, aIntf, aFunc, aFirstArgType, aArgs);
if (!msg) {
return NS_ERROR_FAILURE;
}
return DBusSendMessageWithReply(aConnection, aCallback, aData, aTimeout, msg);
}
nsresult
DBusSendMessageWithReply(DBusConnection* aConnection,
DBusReplyCallback aCallback,
void* aData,
int aTimeout,
const char* aDestination,
const char* aPath,
const char* aIntf,
const char* aFunc,
int aFirstArgType,
...)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aConnection);
va_list args;
va_start(args, aFirstArgType);
auto rv = DBusSendMessageWithReply(aConnection,
aCallback, aData,
aTimeout,
aDestination, aPath, aIntf, aFunc,
aFirstArgType, args);
va_end(args);
if (NS_FAILED(rv)) {
return rv;
}
return NS_OK;
}
}
}
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