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CodeBlock: Add support for multiple children

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This commit is contained in:
MerryMage 2017-03-21 18:10:25 +00:00
parent f03fa54bcb
commit 615fcc621d
1 changed files with 33 additions and 20 deletions
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53
Source/Core/Common/CodeBlock.h
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@ -5,6 +5,7 @@
#pragma once
#include <cstddef>
#include <vector>
#include "Common/Assert.h"
#include "Common/CommonTypes.h"
@ -27,12 +28,13 @@ private:
protected:
u8* region = nullptr;
// Size of region we can use.
size_t region_size = 0;
size_t parent_region_size = 0;
// Original size of the region we allocated.
size_t total_region_size = 0;
bool m_has_child = false;
bool m_is_child = false;
CodeBlock* m_child = nullptr;
std::vector<CodeBlock*> m_children;
public:
virtual ~CodeBlock()
@ -45,7 +47,8 @@ public:
virtual void AllocCodeSpace(size_t size, bool need_low = true)
{
region_size = size;
region = static_cast<u8*>(Common::AllocateExecutableMemory(region_size, need_low));
total_region_size = size;
region = static_cast<u8*>(Common::AllocateExecutableMemory(total_region_size, need_low));
T::SetCodePtr(region);
}
@ -60,14 +63,16 @@ public:
// Call this when shutting down. Don't rely on the destructor, even though it'll do the job.
void FreeCodeSpace()
{
Common::FreeMemoryPages(region, region_size);
_assert_(!m_is_child);
Common::FreeMemoryPages(region, total_region_size);
region = nullptr;
region_size = 0;
parent_region_size = 0;
if (m_has_child)
total_region_size = 0;
for (CodeBlock* child : m_children)
{
m_child->region = nullptr;
m_child->region_size = 0;
child->region = nullptr;
child->region_size = 0;
child->total_region_size = 0;
}
}
@ -78,7 +83,8 @@ public:
void ResetCodePtr() { T::SetCodePtr(region); }
size_t GetSpaceLeft() const
{
return (m_has_child ? parent_region_size : region_size) - (T::GetCodePtr() - region);
_assert_(static_cast<size_t>(T::GetCodePtr() - region) < region_size);
return region_size - (T::GetCodePtr() - region);
}
bool IsAlmostFull() const
@ -86,16 +92,23 @@ public:
// This should be bigger than the biggest block ever.
return GetSpaceLeft() < 0x10000;
}
void AddChildCodeSpace(CodeBlock* child, size_t size)
bool HasChildren() const { return region_size != total_region_size; }
u8* AllocChildCodeSpace(size_t child_size)
{
_assert_msg_(DYNA_REC, !m_has_child, "Already have a child! Can't have another!");
m_child = child;
m_has_child = true;
m_child->m_is_child = true;
u8* child_region = region + region_size - size;
m_child->region = child_region;
m_child->region_size = size;
m_child->ResetCodePtr();
parent_region_size = region_size - size;
_assert_msg_(DYNA_REG, child_size < GetSpaceLeft(), "Insufficient space for child allocation.");
u8* child_region = region + region_size - child_size;
region_size -= child_size;
return child_region;
}
void AddChildCodeSpace(CodeBlock* child, size_t child_size)
{
u8* child_region = AllocChildCodeSpace(child_size);
child->m_is_child = true;
child->region = child_region;
child->region_size = child_size;
child->total_region_size = child_size;
child->ResetCodePtr();
m_children.emplace_back(child);
}
};