address_space: Address feedback
This commit is contained in:
Morph
Fernando Sahmkow
parent
fedd983f96
commit
fa342cae22
3 changed files with 246 additions and 204 deletions
|
|
@ -30,137 +30,151 @@
|
|||
FlatAllocator<VaType, UnmappedVa, AddressSpaceBits>
|
||||
|
||||
namespace Common {
|
||||
MAP_MEMBER_CONST()::FlatAddressSpaceMap(VaType vaLimit_,
|
||||
std::function<void(VaType, VaType)> unmapCallback_)
|
||||
: unmapCallback(std::move(unmapCallback_)), vaLimit(vaLimit_) {
|
||||
if (vaLimit > VaMaximum)
|
||||
MAP_MEMBER_CONST()::FlatAddressSpaceMap(VaType va_limit_,
|
||||
std::function<void(VaType, VaType)> unmap_callback_)
|
||||
: va_limit{va_limit_}, unmap_callback{std::move(unmap_callback_)} {
|
||||
if (va_limit > VaMaximum) {
|
||||
UNREACHABLE_MSG("Invalid VA limit!");
|
||||
}
|
||||
}
|
||||
|
||||
MAP_MEMBER(void)::MapLocked(VaType virt, PaType phys, VaType size, ExtraBlockInfo extraInfo) {
|
||||
VaType virtEnd{virt + size};
|
||||
MAP_MEMBER(void)::MapLocked(VaType virt, PaType phys, VaType size, ExtraBlockInfo extra_info) {
|
||||
VaType virt_end{virt + size};
|
||||
|
||||
if (virtEnd > vaLimit)
|
||||
UNREACHABLE_MSG("Trying to map a block past the VA limit: virtEnd: 0x{:X}, vaLimit: 0x{:X}",
|
||||
virtEnd, vaLimit);
|
||||
if (virt_end > va_limit) {
|
||||
UNREACHABLE_MSG(
|
||||
"Trying to map a block past the VA limit: virt_end: 0x{:X}, va_limit: 0x{:X}", virt_end,
|
||||
va_limit);
|
||||
}
|
||||
|
||||
auto blockEndSuccessor{std::lower_bound(blocks.begin(), blocks.end(), virtEnd)};
|
||||
if (blockEndSuccessor == blocks.begin())
|
||||
UNREACHABLE_MSG("Trying to map a block before the VA start: virtEnd: 0x{:X}", virtEnd);
|
||||
auto block_end_successor{std::lower_bound(blocks.begin(), blocks.end(), virt_end)};
|
||||
if (block_end_successor == blocks.begin()) {
|
||||
UNREACHABLE_MSG("Trying to map a block before the VA start: virt_end: 0x{:X}", virt_end);
|
||||
}
|
||||
|
||||
auto blockEndPredecessor{std::prev(blockEndSuccessor)};
|
||||
auto block_end_predecessor{std::prev(block_end_successor)};
|
||||
|
||||
if (blockEndSuccessor != blocks.end()) {
|
||||
if (block_end_successor != blocks.end()) {
|
||||
// We have blocks in front of us, if one is directly in front then we don't have to add a
|
||||
// tail
|
||||
if (blockEndSuccessor->virt != virtEnd) {
|
||||
if (block_end_successor->virt != virt_end) {
|
||||
PaType tailPhys{[&]() -> PaType {
|
||||
if constexpr (!PaContigSplit) {
|
||||
return blockEndPredecessor
|
||||
->phys; // Always propagate unmapped regions rather than calculating offset
|
||||
// Always propagate unmapped regions rather than calculating offset
|
||||
return block_end_predecessor->phys;
|
||||
} else {
|
||||
if (blockEndPredecessor->Unmapped())
|
||||
return blockEndPredecessor->phys; // Always propagate unmapped regions
|
||||
// rather than calculating offset
|
||||
else
|
||||
return blockEndPredecessor->phys + virtEnd - blockEndPredecessor->virt;
|
||||
if (block_end_predecessor->Unmapped()) {
|
||||
// Always propagate unmapped regions rather than calculating offset
|
||||
return block_end_predecessor->phys;
|
||||
} else {
|
||||
return block_end_predecessor->phys + virt_end - block_end_predecessor->virt;
|
||||
}
|
||||
}
|
||||
}()};
|
||||
|
||||
if (blockEndPredecessor->virt >= virt) {
|
||||
if (block_end_predecessor->virt >= virt) {
|
||||
// If this block's start would be overlapped by the map then reuse it as a tail
|
||||
// block
|
||||
blockEndPredecessor->virt = virtEnd;
|
||||
blockEndPredecessor->phys = tailPhys;
|
||||
blockEndPredecessor->extraInfo = blockEndPredecessor->extraInfo;
|
||||
block_end_predecessor->virt = virt_end;
|
||||
block_end_predecessor->phys = tailPhys;
|
||||
block_end_predecessor->extra_info = block_end_predecessor->extra_info;
|
||||
|
||||
// No longer predecessor anymore
|
||||
blockEndSuccessor = blockEndPredecessor--;
|
||||
block_end_successor = block_end_predecessor--;
|
||||
} else {
|
||||
// Else insert a new one and we're done
|
||||
blocks.insert(blockEndSuccessor,
|
||||
{Block(virt, phys, extraInfo),
|
||||
Block(virtEnd, tailPhys, blockEndPredecessor->extraInfo)});
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
blocks.insert(block_end_successor,
|
||||
{Block(virt, phys, extra_info),
|
||||
Block(virt_end, tailPhys, block_end_predecessor->extra_info)});
|
||||
if (unmap_callback) {
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// blockEndPredecessor will always be unmapped as blocks has to be terminated by an unmapped
|
||||
// chunk
|
||||
if (blockEndPredecessor != blocks.begin() && blockEndPredecessor->virt >= virt) {
|
||||
// block_end_predecessor will always be unmapped as blocks has to be terminated by an
|
||||
// unmapped chunk
|
||||
if (block_end_predecessor != blocks.begin() && block_end_predecessor->virt >= virt) {
|
||||
// Move the unmapped block start backwards
|
||||
blockEndPredecessor->virt = virtEnd;
|
||||
block_end_predecessor->virt = virt_end;
|
||||
|
||||
// No longer predecessor anymore
|
||||
blockEndSuccessor = blockEndPredecessor--;
|
||||
block_end_successor = block_end_predecessor--;
|
||||
} else {
|
||||
// Else insert a new one and we're done
|
||||
blocks.insert(blockEndSuccessor,
|
||||
{Block(virt, phys, extraInfo), Block(virtEnd, UnmappedPa, {})});
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
blocks.insert(block_end_successor,
|
||||
{Block(virt, phys, extra_info), Block(virt_end, UnmappedPa, {})});
|
||||
if (unmap_callback) {
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
auto blockStartSuccessor{blockEndSuccessor};
|
||||
auto block_start_successor{block_end_successor};
|
||||
|
||||
// Walk the block vector to find the start successor as this is more efficient than another
|
||||
// binary search in most scenarios
|
||||
while (std::prev(blockStartSuccessor)->virt >= virt)
|
||||
blockStartSuccessor--;
|
||||
|
||||
// Check that the start successor is either the end block or something in between
|
||||
if (blockStartSuccessor->virt > virtEnd) {
|
||||
UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", blockStartSuccessor->virt);
|
||||
} else if (blockStartSuccessor->virt == virtEnd) {
|
||||
// We need to create a new block as there are none spare that we would overwrite
|
||||
blocks.insert(blockStartSuccessor, Block(virt, phys, extraInfo));
|
||||
} else {
|
||||
// Erase overwritten blocks
|
||||
if (auto eraseStart{std::next(blockStartSuccessor)}; eraseStart != blockEndSuccessor)
|
||||
blocks.erase(eraseStart, blockEndSuccessor);
|
||||
|
||||
// Reuse a block that would otherwise be overwritten as a start block
|
||||
blockStartSuccessor->virt = virt;
|
||||
blockStartSuccessor->phys = phys;
|
||||
blockStartSuccessor->extraInfo = extraInfo;
|
||||
while (std::prev(block_start_successor)->virt >= virt) {
|
||||
block_start_successor--;
|
||||
}
|
||||
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
// Check that the start successor is either the end block or something in between
|
||||
if (block_start_successor->virt > virt_end) {
|
||||
UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", block_start_successor->virt);
|
||||
} else if (block_start_successor->virt == virt_end) {
|
||||
// We need to create a new block as there are none spare that we would overwrite
|
||||
blocks.insert(block_start_successor, Block(virt, phys, extra_info));
|
||||
} else {
|
||||
// Erase overwritten blocks
|
||||
if (auto eraseStart{std::next(block_start_successor)}; eraseStart != block_end_successor) {
|
||||
blocks.erase(eraseStart, block_end_successor);
|
||||
}
|
||||
|
||||
// Reuse a block that would otherwise be overwritten as a start block
|
||||
block_start_successor->virt = virt;
|
||||
block_start_successor->phys = phys;
|
||||
block_start_successor->extra_info = extra_info;
|
||||
}
|
||||
|
||||
if (unmap_callback) {
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
}
|
||||
|
||||
MAP_MEMBER(void)::UnmapLocked(VaType virt, VaType size) {
|
||||
VaType virtEnd{virt + size};
|
||||
VaType virt_end{virt + size};
|
||||
|
||||
if (virtEnd > vaLimit)
|
||||
UNREACHABLE_MSG("Trying to map a block past the VA limit: virtEnd: 0x{:X}, vaLimit: 0x{:X}",
|
||||
virtEnd, vaLimit);
|
||||
if (virt_end > va_limit) {
|
||||
UNREACHABLE_MSG(
|
||||
"Trying to map a block past the VA limit: virt_end: 0x{:X}, va_limit: 0x{:X}", virt_end,
|
||||
va_limit);
|
||||
}
|
||||
|
||||
auto blockEndSuccessor{std::lower_bound(blocks.begin(), blocks.end(), virtEnd)};
|
||||
if (blockEndSuccessor == blocks.begin())
|
||||
UNREACHABLE_MSG("Trying to unmap a block before the VA start: virtEnd: 0x{:X}", virtEnd);
|
||||
auto block_end_successor{std::lower_bound(blocks.begin(), blocks.end(), virt_end)};
|
||||
if (block_end_successor == blocks.begin()) {
|
||||
UNREACHABLE_MSG("Trying to unmap a block before the VA start: virt_end: 0x{:X}", virt_end);
|
||||
}
|
||||
|
||||
auto blockEndPredecessor{std::prev(blockEndSuccessor)};
|
||||
auto block_end_predecessor{std::prev(block_end_successor)};
|
||||
|
||||
auto walkBackToPredecessor{[&](auto iter) {
|
||||
while (iter->virt >= virt)
|
||||
auto walk_back_to_predecessor{[&](auto iter) {
|
||||
while (iter->virt >= virt) {
|
||||
iter--;
|
||||
}
|
||||
|
||||
return iter;
|
||||
}};
|
||||
|
||||
auto eraseBlocksWithEndUnmapped{[&](auto unmappedEnd) {
|
||||
auto blockStartPredecessor{walkBackToPredecessor(unmappedEnd)};
|
||||
auto blockStartSuccessor{std::next(blockStartPredecessor)};
|
||||
auto erase_blocks_with_end_unmapped{[&](auto unmappedEnd) {
|
||||
auto block_start_predecessor{walk_back_to_predecessor(unmappedEnd)};
|
||||
auto block_start_successor{std::next(block_start_predecessor)};
|
||||
|
||||
auto eraseEnd{[&]() {
|
||||
if (blockStartPredecessor->Unmapped()) {
|
||||
if (block_start_predecessor->Unmapped()) {
|
||||
// If the start predecessor is unmapped then we can erase everything in our region
|
||||
// and be done
|
||||
return std::next(unmappedEnd);
|
||||
|
|
@ -174,158 +188,171 @@ MAP_MEMBER(void)::UnmapLocked(VaType virt, VaType size) {
|
|||
|
||||
// We can't have two unmapped regions after each other
|
||||
if (eraseEnd != blocks.end() &&
|
||||
(eraseEnd == blockStartSuccessor ||
|
||||
(blockStartPredecessor->Unmapped() && eraseEnd->Unmapped())))
|
||||
(eraseEnd == block_start_successor ||
|
||||
(block_start_predecessor->Unmapped() && eraseEnd->Unmapped()))) {
|
||||
UNREACHABLE_MSG("Multiple contiguous unmapped regions are unsupported!");
|
||||
}
|
||||
|
||||
blocks.erase(blockStartSuccessor, eraseEnd);
|
||||
blocks.erase(block_start_successor, eraseEnd);
|
||||
}};
|
||||
|
||||
// We can avoid any splitting logic if these are the case
|
||||
if (blockEndPredecessor->Unmapped()) {
|
||||
if (blockEndPredecessor->virt > virt)
|
||||
eraseBlocksWithEndUnmapped(blockEndPredecessor);
|
||||
if (block_end_predecessor->Unmapped()) {
|
||||
if (block_end_predecessor->virt > virt) {
|
||||
erase_blocks_with_end_unmapped(block_end_predecessor);
|
||||
}
|
||||
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
if (unmap_callback) {
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
|
||||
return; // The region is unmapped, bail out early
|
||||
} else if (blockEndSuccessor->virt == virtEnd && blockEndSuccessor->Unmapped()) {
|
||||
eraseBlocksWithEndUnmapped(blockEndSuccessor);
|
||||
} else if (block_end_successor->virt == virt_end && block_end_successor->Unmapped()) {
|
||||
erase_blocks_with_end_unmapped(block_end_successor);
|
||||
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
if (unmap_callback) {
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
|
||||
return; // The region is unmapped here and doesn't need splitting, bail out early
|
||||
} else if (blockEndSuccessor == blocks.end()) {
|
||||
} else if (block_end_successor == blocks.end()) {
|
||||
// This should never happen as the end should always follow an unmapped block
|
||||
UNREACHABLE_MSG("Unexpected Memory Manager state!");
|
||||
} else if (blockEndSuccessor->virt != virtEnd) {
|
||||
} else if (block_end_successor->virt != virt_end) {
|
||||
// If one block is directly in front then we don't have to add a tail
|
||||
|
||||
// The previous block is mapped so we will need to add a tail with an offset
|
||||
PaType tailPhys{[&]() {
|
||||
if constexpr (PaContigSplit)
|
||||
return blockEndPredecessor->phys + virtEnd - blockEndPredecessor->virt;
|
||||
else
|
||||
return blockEndPredecessor->phys;
|
||||
if constexpr (PaContigSplit) {
|
||||
return block_end_predecessor->phys + virt_end - block_end_predecessor->virt;
|
||||
} else {
|
||||
return block_end_predecessor->phys;
|
||||
}
|
||||
}()};
|
||||
|
||||
if (blockEndPredecessor->virt >= virt) {
|
||||
if (block_end_predecessor->virt >= virt) {
|
||||
// If this block's start would be overlapped by the unmap then reuse it as a tail block
|
||||
blockEndPredecessor->virt = virtEnd;
|
||||
blockEndPredecessor->phys = tailPhys;
|
||||
block_end_predecessor->virt = virt_end;
|
||||
block_end_predecessor->phys = tailPhys;
|
||||
|
||||
// No longer predecessor anymore
|
||||
blockEndSuccessor = blockEndPredecessor--;
|
||||
block_end_successor = block_end_predecessor--;
|
||||
} else {
|
||||
blocks.insert(blockEndSuccessor,
|
||||
blocks.insert(block_end_successor,
|
||||
{Block(virt, UnmappedPa, {}),
|
||||
Block(virtEnd, tailPhys, blockEndPredecessor->extraInfo)});
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
Block(virt_end, tailPhys, block_end_predecessor->extra_info)});
|
||||
if (unmap_callback) {
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
|
||||
return; // The previous block is mapped and ends before
|
||||
// The previous block is mapped and ends before
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
// Walk the block vector to find the start predecessor as this is more efficient than another
|
||||
// binary search in most scenarios
|
||||
auto blockStartPredecessor{walkBackToPredecessor(blockEndSuccessor)};
|
||||
auto blockStartSuccessor{std::next(blockStartPredecessor)};
|
||||
auto block_start_predecessor{walk_back_to_predecessor(block_end_successor)};
|
||||
auto block_start_successor{std::next(block_start_predecessor)};
|
||||
|
||||
if (blockStartSuccessor->virt > virtEnd) {
|
||||
UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", blockStartSuccessor->virt);
|
||||
} else if (blockStartSuccessor->virt == virtEnd) {
|
||||
if (block_start_successor->virt > virt_end) {
|
||||
UNREACHABLE_MSG("Unsorted block in AS map: virt: 0x{:X}", block_start_successor->virt);
|
||||
} else if (block_start_successor->virt == virt_end) {
|
||||
// There are no blocks between the start and the end that would let us skip inserting a new
|
||||
// one for head
|
||||
|
||||
// The previous block is may be unmapped, if so we don't need to insert any unmaps after it
|
||||
if (blockStartPredecessor->Mapped())
|
||||
blocks.insert(blockStartSuccessor, Block(virt, UnmappedPa, {}));
|
||||
} else if (blockStartPredecessor->Unmapped()) {
|
||||
if (block_start_predecessor->Mapped()) {
|
||||
blocks.insert(block_start_successor, Block(virt, UnmappedPa, {}));
|
||||
}
|
||||
} else if (block_start_predecessor->Unmapped()) {
|
||||
// If the previous block is unmapped
|
||||
blocks.erase(blockStartSuccessor, blockEndPredecessor);
|
||||
blocks.erase(block_start_successor, block_end_predecessor);
|
||||
} else {
|
||||
// Erase overwritten blocks, skipping the first one as we have written the unmapped start
|
||||
// block there
|
||||
if (auto eraseStart{std::next(blockStartSuccessor)}; eraseStart != blockEndSuccessor)
|
||||
blocks.erase(eraseStart, blockEndSuccessor);
|
||||
if (auto eraseStart{std::next(block_start_successor)}; eraseStart != block_end_successor) {
|
||||
blocks.erase(eraseStart, block_end_successor);
|
||||
}
|
||||
|
||||
// Add in the unmapped block header
|
||||
blockStartSuccessor->virt = virt;
|
||||
blockStartSuccessor->phys = UnmappedPa;
|
||||
block_start_successor->virt = virt;
|
||||
block_start_successor->phys = UnmappedPa;
|
||||
}
|
||||
|
||||
if (unmapCallback)
|
||||
unmapCallback(virt, size);
|
||||
if (unmap_callback)
|
||||
unmap_callback(virt, size);
|
||||
}
|
||||
|
||||
ALLOC_MEMBER_CONST()::FlatAllocator(VaType vaStart_, VaType vaLimit_)
|
||||
: Base(vaLimit_), currentLinearAllocEnd(vaStart_), vaStart(vaStart_) {}
|
||||
ALLOC_MEMBER_CONST()::FlatAllocator(VaType va_start_, VaType va_limit_)
|
||||
: Base{va_limit_}, va_start{va_start_}, current_linear_alloc_end{va_start_} {}
|
||||
|
||||
ALLOC_MEMBER(VaType)::Allocate(VaType size) {
|
||||
std::scoped_lock lock(this->blockMutex);
|
||||
std::scoped_lock lock(this->block_mutex);
|
||||
|
||||
VaType allocStart{UnmappedVa};
|
||||
VaType allocEnd{currentLinearAllocEnd + size};
|
||||
VaType alloc_start{UnmappedVa};
|
||||
VaType alloc_end{current_linear_alloc_end + size};
|
||||
|
||||
// Avoid searching backwards in the address space if possible
|
||||
if (allocEnd >= currentLinearAllocEnd && allocEnd <= this->vaLimit) {
|
||||
auto allocEndSuccessor{
|
||||
std::lower_bound(this->blocks.begin(), this->blocks.end(), allocEnd)};
|
||||
if (allocEndSuccessor == this->blocks.begin())
|
||||
if (alloc_end >= current_linear_alloc_end && alloc_end <= this->va_limit) {
|
||||
auto alloc_end_successor{
|
||||
std::lower_bound(this->blocks.begin(), this->blocks.end(), alloc_end)};
|
||||
if (alloc_end_successor == this->blocks.begin()) {
|
||||
UNREACHABLE_MSG("First block in AS map is invalid!");
|
||||
}
|
||||
|
||||
auto allocEndPredecessor{std::prev(allocEndSuccessor)};
|
||||
if (allocEndPredecessor->virt <= currentLinearAllocEnd) {
|
||||
allocStart = currentLinearAllocEnd;
|
||||
auto alloc_end_predecessor{std::prev(alloc_end_successor)};
|
||||
if (alloc_end_predecessor->virt <= current_linear_alloc_end) {
|
||||
alloc_start = current_linear_alloc_end;
|
||||
} else {
|
||||
// Skip over fixed any mappings in front of us
|
||||
while (allocEndSuccessor != this->blocks.end()) {
|
||||
if (allocEndSuccessor->virt - allocEndPredecessor->virt < size ||
|
||||
allocEndPredecessor->Mapped()) {
|
||||
allocStart = allocEndPredecessor->virt;
|
||||
while (alloc_end_successor != this->blocks.end()) {
|
||||
if (alloc_end_successor->virt - alloc_end_predecessor->virt < size ||
|
||||
alloc_end_predecessor->Mapped()) {
|
||||
alloc_start = alloc_end_predecessor->virt;
|
||||
break;
|
||||
}
|
||||
|
||||
allocEndPredecessor = allocEndSuccessor++;
|
||||
alloc_end_predecessor = alloc_end_successor++;
|
||||
|
||||
// Use the VA limit to calculate if we can fit in the final block since it has no
|
||||
// successor
|
||||
if (allocEndSuccessor == this->blocks.end()) {
|
||||
allocEnd = allocEndPredecessor->virt + size;
|
||||
if (alloc_end_successor == this->blocks.end()) {
|
||||
alloc_end = alloc_end_predecessor->virt + size;
|
||||
|
||||
if (allocEnd >= allocEndPredecessor->virt && allocEnd <= this->vaLimit)
|
||||
allocStart = allocEndPredecessor->virt;
|
||||
if (alloc_end >= alloc_end_predecessor->virt && alloc_end <= this->va_limit) {
|
||||
alloc_start = alloc_end_predecessor->virt;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (allocStart != UnmappedVa) {
|
||||
currentLinearAllocEnd = allocStart + size;
|
||||
if (alloc_start != UnmappedVa) {
|
||||
current_linear_alloc_end = alloc_start + size;
|
||||
} else { // If linear allocation overflows the AS then find a gap
|
||||
if (this->blocks.size() <= 2)
|
||||
if (this->blocks.size() <= 2) {
|
||||
UNREACHABLE_MSG("Unexpected allocator state!");
|
||||
|
||||
auto searchPredecessor{this->blocks.begin()};
|
||||
auto searchSuccessor{std::next(searchPredecessor)};
|
||||
|
||||
while (searchSuccessor != this->blocks.end() &&
|
||||
(searchSuccessor->virt - searchPredecessor->virt < size ||
|
||||
searchPredecessor->Mapped())) {
|
||||
searchPredecessor = searchSuccessor++;
|
||||
}
|
||||
|
||||
if (searchSuccessor != this->blocks.end())
|
||||
allocStart = searchPredecessor->virt;
|
||||
else
|
||||
auto search_predecessor{this->blocks.begin()};
|
||||
auto search_successor{std::next(search_predecessor)};
|
||||
|
||||
while (search_successor != this->blocks.end() &&
|
||||
(search_successor->virt - search_predecessor->virt < size ||
|
||||
search_predecessor->Mapped())) {
|
||||
search_predecessor = search_successor++;
|
||||
}
|
||||
|
||||
if (search_successor != this->blocks.end()) {
|
||||
alloc_start = search_predecessor->virt;
|
||||
} else {
|
||||
return {}; // AS is full
|
||||
}
|
||||
}
|
||||
|
||||
this->MapLocked(allocStart, true, size, {});
|
||||
return allocStart;
|
||||
this->MapLocked(alloc_start, true, size, {});
|
||||
return alloc_start;
|
||||
}
|
||||
|
||||
ALLOC_MEMBER(void)::AllocateFixed(VaType virt, VaType size) {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue