ef24e72b26
Involves making asserts use printf instead of the log functions (log functions are asynchronous and, as such, the log won't be printed in time) As such, the log type argument was removed (printf obviously can't use it, and it's made obsolete by the file and line printing) Also removed some GEKKO cruft.
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include "core/hle/kernel/kernel.h"
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#include "core/mem_map.h"
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namespace Kernel {
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static const int kCommandHeaderOffset = 0x80; ///< Offset into command buffer of header
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/**
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* Returns a pointer to the command buffer in kernel memory
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* @param offset Optional offset into command buffer
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* @return Pointer to command buffer
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*/
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inline static u32* GetCommandBuffer(const int offset=0) {
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return (u32*)Memory::GetPointer(Memory::KERNEL_MEMORY_VADDR + kCommandHeaderOffset + offset);
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}
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/**
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* Kernel object representing the client endpoint of an IPC session. Sessions are the basic CTR-OS
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* primitive for communication between different processes, and are used to implement service calls
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* to the various system services.
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*
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* To make a service call, the client must write the command header and parameters to the buffer
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* located at offset 0x80 of the TLS (Thread-Local Storage) area, then execute a SendSyncRequest
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* SVC call with its Session handle. The kernel will read the command header, using it to marshall
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* the parameters to the process at the server endpoint of the session. After the server replies to
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* the request, the response is marshalled back to the caller's TLS buffer and control is
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* transferred back to it.
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*
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* In Citra, only the client endpoint is currently implemented and only HLE calls, where the IPC
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* request is answered by C++ code in the emulator, are supported. When SendSyncRequest is called
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* with the session handle, this class's SyncRequest method is called, which should read the TLS
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* buffer and emulate the call accordingly. Since the code can directly read the emulated memory,
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* no parameter marshalling is done.
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*
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* In the long term, this should be turned into the full-fledged IPC mechanism implemented by
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* CTR-OS so that IPC calls can be optionally handled by the real implementations of processes, as
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* opposed to HLE simulations.
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*/
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class Session : public WaitObject {
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public:
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Session();
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~Session() override;
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std::string GetTypeName() const override { return "Session"; }
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static const HandleType HANDLE_TYPE = HandleType::Session;
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HandleType GetHandleType() const override { return HANDLE_TYPE; }
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/**
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* Handles a synchronous call to this session using HLE emulation. Emulated <-> emulated calls
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* aren't supported yet.
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*/
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virtual ResultVal<bool> SyncRequest() = 0;
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// TODO(bunnei): These functions exist to satisfy a hardware test with a Session object
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// passed into WaitSynchronization. Figure out the meaning of them.
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bool ShouldWait() override {
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return true;
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}
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void Acquire() override {
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ASSERT_MSG(!ShouldWait(), "object unavailable!");
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}
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};
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}
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