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69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
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// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
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#pragma once
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#include "common/types.h"
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class JitCodeBuffer
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{
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public:
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JitCodeBuffer();
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JitCodeBuffer(u32 size, u32 far_code_size);
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JitCodeBuffer(void* buffer, u32 size, u32 far_code_size, u32 guard_size);
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~JitCodeBuffer();
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bool IsValid() const { return (m_code_ptr != nullptr); }
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bool Allocate(u32 size = 64 * 1024 * 1024, u32 far_code_size = 0);
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bool Initialize(void* buffer, u32 size, u32 far_code_size = 0, u32 guard_size = 0);
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void Destroy();
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void Reset();
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ALWAYS_INLINE u8* GetCodePointer() const { return m_code_ptr; }
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ALWAYS_INLINE u32 GetTotalSize() const { return m_total_size; }
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ALWAYS_INLINE float GetUsedPct() const
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{
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return (static_cast<float>(m_code_used) / static_cast<float>(m_code_size)) * 100.0f;
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}
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ALWAYS_INLINE float GetFarUsedPct() const
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{
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return (static_cast<float>(m_far_code_used) / static_cast<float>(m_far_code_size)) * 100.0f;
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}
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ALWAYS_INLINE u32 GetTotalUsed() const { return m_code_used + m_far_code_used; }
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ALWAYS_INLINE u8* GetFreeCodePointer() const { return m_free_code_ptr; }
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ALWAYS_INLINE u32 GetFreeCodeSpace() const { return static_cast<u32>(m_code_size - m_code_used); }
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void ReserveCode(u32 size);
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void CommitCode(u32 length);
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ALWAYS_INLINE u8* GetFreeFarCodePointer() const { return m_free_far_code_ptr; }
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ALWAYS_INLINE u32 GetFreeFarCodeSpace() const { return static_cast<u32>(m_far_code_size - m_far_code_used); }
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void CommitFarCode(u32 length);
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/// Adjusts the free code pointer to the specified alignment, padding with bytes.
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/// Assumes alignment is a power-of-two.
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void Align(u32 alignment, u8 padding_value);
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/// Flushes the instruction cache on the host for the specified range.
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static void FlushInstructionCache(void* address, u32 size);
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private:
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bool TryAllocateAt(const void* addr);
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u8* m_code_ptr = nullptr;
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u8* m_free_code_ptr = nullptr;
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u32 m_code_size = 0;
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u32 m_code_reserve_size = 0;
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u32 m_code_used = 0;
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u8* m_far_code_ptr = nullptr;
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u8* m_free_far_code_ptr = nullptr;
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u32 m_far_code_size = 0;
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u32 m_far_code_used = 0;
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u32 m_total_size = 0;
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u32 m_guard_size = 0;
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u32 m_old_protection = 0;
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bool m_owns_buffer = false;
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};
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