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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This file provides infrastructure for dispatching host resource call
// messages. Normal IPC message handlers can't take extra parameters or
// return values. We want to take a HostMessageContext as a parameter and
// also return the int32_t return value to the caller.
#ifndef PPAPI_HOST_DISPATCH_HOST_MESSAGE_H_
#define PPAPI_HOST_DISPATCH_HOST_MESSAGE_H_
#include <stdint.h>
#include <tuple>
#include "base/profiler/scoped_profile.h"
#include "ipc/ipc_message_macros.h"
#include "ppapi/c/pp_errors.h"
namespace ppapi {
namespace host {
struct HostMessageContext;
template <class ObjT, class Method>
inline int32_t DispatchResourceCall(ObjT* obj, Method method,
HostMessageContext* context,
std::tuple<>& arg) {
return (obj->*method)(context);
}
template <class ObjT, class Method, class A>
inline int32_t DispatchResourceCall(ObjT* obj, Method method,
HostMessageContext* context,
std::tuple<A>& arg) {
return (obj->*method)(context, std::get<0>(arg));
}
template<class ObjT, class Method, class A, class B>
inline int32_t DispatchResourceCall(ObjT* obj, Method method,
HostMessageContext* context,
std::tuple<A, B>& arg) {
return (obj->*method)(context, std::get<0>(arg), std::get<1>(arg));
}
template<class ObjT, class Method, class A, class B, class C>
inline int32_t DispatchResourceCall(ObjT* obj, Method method,
HostMessageContext* context,
std::tuple<A, B, C>& arg) {
return (obj->*method)(context, std::get<0>(arg), std::get<1>(arg),
std::get<2>(arg));
}
template<class ObjT, class Method, class A, class B, class C, class D>
inline int32_t DispatchResourceCall(ObjT* obj, Method method,
HostMessageContext* context,
std::tuple<A, B, C, D>& arg) {
return (obj->*method)(context, std::get<0>(arg), std::get<1>(arg),
std::get<2>(arg), std::get<3>(arg));
}
template<class ObjT, class Method, class A, class B, class C, class D, class E>
inline int32_t DispatchResourceCall(ObjT* obj, Method method,
HostMessageContext* context,
std::tuple<A, B, C, D, E>& arg) {
return (obj->*method)(context, std::get<0>(arg), std::get<1>(arg),
std::get<2>(arg), std::get<3>(arg),
std::get<4>(arg));
}
// Note that this only works for message with 1 or more parameters. For
// 0-parameter messages you need to use the _0 version below (since there are
// no params in the message).
#define PPAPI_DISPATCH_HOST_RESOURCE_CALL(msg_class, member_func) \
case msg_class::ID: { \
TRACK_RUN_IN_THIS_SCOPED_REGION(member_func); \
msg_class::Schema::Param p; \
if (msg_class::Read(&ipc_message__, &p)) { \
return ppapi::host::DispatchResourceCall( \
this, \
&_IpcMessageHandlerClass::member_func, \
context, p); \
} \
return PP_ERROR_FAILED; \
}
#define PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(msg_class, member_func) \
case msg_class::ID: { \
TRACK_RUN_IN_THIS_SCOPED_REGION(member_func); \
return member_func(context); \
}
} // namespace host
} // namespace ppapi
#endif // PPAPI_HOST_DISPATCH_HOST_MESSAGE_H_
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