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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/scope_exit.h"
#include "core/core.h"
#include "core/hle/kernel/k_client_session.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_server_session.h"
#include "core/hle/kernel/svc.h"
namespace Kernel::Svc {
/// Makes a blocking IPC call to a service.
Result SendSyncRequest(Core::System& system, Handle handle) {
auto& kernel = system.Kernel();
// Get the client session from its handle.
KScopedAutoObject session =
kernel.CurrentProcess()->GetHandleTable().GetObject<KClientSession>(handle);
R_UNLESS(session.IsNotNull(), ResultInvalidHandle);
LOG_TRACE(Kernel_SVC, "called handle=0x{:08X}({})", handle, session->GetName());
return session->SendSyncRequest();
}
Result SendSyncRequest32(Core::System& system, Handle handle) {
return SendSyncRequest(system, handle);
}
Result ReplyAndReceive(Core::System& system, s32* out_index, Handle* handles, s32 num_handles,
Handle reply_target, s64 timeout_ns) {
auto& kernel = system.Kernel();
auto& handle_table = GetCurrentThread(kernel).GetOwnerProcess()->GetHandleTable();
// Convert handle list to object table.
std::vector<KSynchronizationObject*> objs(num_handles);
R_UNLESS(
handle_table.GetMultipleObjects<KSynchronizationObject>(objs.data(), handles, num_handles),
ResultInvalidHandle);
// Ensure handles are closed when we're done.
SCOPE_EXIT({
for (auto i = 0; i < num_handles; ++i) {
objs[i]->Close();
}
});
// Reply to the target, if one is specified.
if (reply_target != InvalidHandle) {
KScopedAutoObject session = handle_table.GetObject<KServerSession>(reply_target);
R_UNLESS(session.IsNotNull(), ResultInvalidHandle);
// If we fail to reply, we want to set the output index to -1.
ON_RESULT_FAILURE {
*out_index = -1;
};
// Send the reply.
R_TRY(session->SendReply());
}
// Wait for a message.
while (true) {
// Wait for an object.
s32 index;
Result result = KSynchronizationObject::Wait(kernel, &index, objs.data(),
static_cast<s32>(objs.size()), timeout_ns);
if (result == ResultTimedOut) {
return result;
}
// Receive the request.
if (R_SUCCEEDED(result)) {
KServerSession* session = objs[index]->DynamicCast<KServerSession*>();
if (session != nullptr) {
result = session->ReceiveRequest();
if (result == ResultNotFound) {
continue;
}
}
}
*out_index = index;
return result;
}
}
} // namespace Kernel::Svc
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