- Implementation.
- Use in SkLinearPipeline.
TBR=mtklein@google.com
Change-Id: Ie014184469b217132b0307b5a9ae40c0c60e5fc9
Reviewed-on: https://skia-review.googlesource.com/6921
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Herb Derby <herb@google.com>
char storage[600];
- SkFixedAlloc fixedAlloc{storage, sizeof(storage)};
- SkFallbackAlloc allocator{&fixedAlloc};
+ SkArenaAlloc allocator{storage, sizeof(storage), 512};
SkLinearBitmapPipeline pipeline{
fInvert, filterQuality, fXTile, fYTile, SK_ColorBLACK, srcPixmap, &allocator};
auto procN = SkXfermode::GetD32Proc(SkBlendMode::kSrcOver, flags);
char storage[512];
- SkFixedAlloc fixedAlloc{storage, sizeof(storage)};
- SkFallbackAlloc allocator{&fixedAlloc};
+ SkArenaAlloc allocator{storage, sizeof(storage)};
SkLinearBitmapPipeline pipeline{
inv, filterQuality,
SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode,
template <typename T> struct underlying_type {
using type = __underlying_type(T);
};
+template <typename T>using is_trivially_destructible<T> = std::has_trivial_destructor<T>;
#else
template <typename T> using underlying_type = std::underlying_type<T>;
+template <typename T> using is_trivially_destructible = std::is_trivially_destructible<T>;
#endif
template <typename T> using underlying_type_t = typename skstd::underlying_type<T>::type;
private:
char fStorage[512 + 96];
- SkFixedAlloc fFixedAlloc {fStorage, sizeof(fStorage)};
- SkFallbackAlloc fAllocator {&fFixedAlloc};
+ SkArenaAlloc fAllocator {fStorage, sizeof(fStorage)};
SkLinearBitmapPipeline* fShaderPipeline;
SkLinearBitmapPipeline* fBlitterPipeline;
SkXfermode::D32Proc fSrcModeProc;
#include "SkFixedAlloc.h"
+#include <algorithm>
+
SkFixedAlloc::SkFixedAlloc(void* ptr, size_t len)
: fStorage((char*)ptr), fCursor(fStorage), fEnd(fStorage + len) {}
}
fFixedAlloc->reset();
}
+
+struct Skipper {
+ char* operator()(char* objEnd, ptrdiff_t size) { return objEnd + size; }
+};
+
+struct NextBlock {
+ char* operator()(char* objEnd, ptrdiff_t size) { delete [] objEnd; return objEnd + size; }
+};
+
+SkArenaAlloc::SkArenaAlloc(char* block, size_t size, size_t extraSize)
+ : fDtorCursor{block}
+ , fCursor {block}
+ , fEnd {block + size}
+ , fExtraSize {extraSize}
+{
+ if (size < sizeof(Footer)) {
+ fEnd = fCursor = fDtorCursor = nullptr;
+ }
+
+ if (fCursor != nullptr) {
+ this->installFooter(EndChain, 0);
+ }
+}
+
+SkArenaAlloc::~SkArenaAlloc() {
+ this->reset();
+}
+
+void SkArenaAlloc::reset() {
+ Footer f;
+ memmove(&f, fDtorCursor - sizeof(Footer), sizeof(Footer));
+ char* releaser = fDtorCursor;
+ while (releaser != nullptr) {
+ releaser = this->callFooterAction(releaser);
+ }
+}
+
+void SkArenaAlloc::installFooter(FooterAction* releaser, ptrdiff_t padding) {
+ ptrdiff_t releaserDiff = (char *)releaser - (char *)EndChain;
+ ptrdiff_t footerData = SkLeftShift((int64_t)releaserDiff, 5) | padding;
+ if (padding >= 32 || !SkTFitsIn<int32_t>(footerData)) {
+ // Footer data will not fit.
+ SkFAIL("Constraints are busted.");
+ }
+
+ Footer footer = (Footer)(footerData);
+ memmove(fCursor, &footer, sizeof(Footer));
+ Footer check;
+ memmove(&check, fCursor, sizeof(Footer));
+ fCursor += sizeof(Footer);
+ fDtorCursor = fCursor;
+}
+
+void SkArenaAlloc::ensureSpace(size_t size, size_t alignment) {
+ constexpr size_t headerSize = sizeof(Footer) + sizeof(ptrdiff_t);
+ // The chrome c++ library we use does not define std::max_align_t.
+ // This must be conservative to add the right amount of extra memory to handle the alignment
+ // padding.
+ constexpr size_t alignof_max_align_t = 8;
+ auto objSizeAndOverhead = size + headerSize + sizeof(Footer);
+ if (alignment > alignof_max_align_t) {
+ objSizeAndOverhead += alignment - 1;
+ }
+
+ auto allocationSize = std::max(objSizeAndOverhead, fExtraSize);
+
+ // Round up to a nice size. If > 32K align to 4K boundary else up to max_align_t. The > 32K
+ // heuristic is from the JEMalloc behavior.
+ {
+ size_t mask = allocationSize > (1 << 15) ? (1 << 12) - 1 : 32 - 1;
+ allocationSize = (allocationSize + mask) & ~mask;
+ }
+
+ char* newBlock = new char[allocationSize];
+
+ auto previousDtor = fDtorCursor;
+ fCursor = newBlock;
+ fDtorCursor = newBlock;
+ fEnd = fCursor + allocationSize;
+ this->installIntFooter<NextBlock>(previousDtor - fCursor, 0);
+}
+
+char* SkArenaAlloc::allocObject(size_t size, size_t alignment) {
+ size_t mask = alignment - 1;
+ char* objStart = (char*)((uintptr_t)(fCursor + mask) & ~mask);
+ if (objStart + size > fEnd) {
+ this->ensureSpace(size, alignment);
+ objStart = (char*)((uintptr_t)(fCursor + mask) & ~mask);
+ }
+ return objStart;
+}
+
+// * sizeAndFooter - the memory for the footer in addition to the size for the object.
+// * alignment - alignment needed by the object.
+char* SkArenaAlloc::allocObjectWithFooter(size_t sizeIncludingFooter, size_t alignment) {
+ size_t mask = alignment - 1;
+
+ restart:
+ size_t skipOverhead = 0;
+ bool needsSkipFooter = fCursor != fDtorCursor;
+ if (needsSkipFooter) {
+ size_t skipSize = SkTFitsIn<int32_t>(fDtorCursor - fCursor)
+ ? sizeof(int32_t)
+ : sizeof(ptrdiff_t);
+ skipOverhead = sizeof(Footer) + skipSize;
+ }
+ char* objStart = (char*)((uintptr_t)(fCursor + skipOverhead + mask) & ~mask);
+ size_t totalSize = sizeIncludingFooter + skipOverhead;
+
+ if (objStart + totalSize > fEnd) {
+ this->ensureSpace(totalSize, alignment);
+ goto restart;
+ }
+
+ SkASSERT(objStart + totalSize <= fEnd);
+
+ // Install a skip footer if needed, thus terminating a run of POD data. The calling code is
+ // responsible for installing the footer after the object.
+ if (needsSkipFooter) {
+ this->installIntFooter<Skipper>(fDtorCursor - fCursor, 0);
+ }
+
+ return objStart;
+}
+
+char* SkArenaAlloc::callFooterAction(char* end) {
+ Footer footer;
+ memcpy(&footer, end - sizeof(Footer), sizeof(Footer));
+
+ FooterAction* releaser = (FooterAction*)((char*)EndChain + (footer >> 5));
+ ptrdiff_t padding = footer & 31;
+
+ char* r = releaser(end) - padding;
+
+ return r;
+}
+
+char* SkArenaAlloc::EndChain(char*) { return nullptr; }
+
#include "SkTFitsIn.h"
#include "SkTypes.h"
+#include <cstddef>
#include <new>
+#include <type_traits>
#include <utility>
#include <vector>
return new (ptr) T(std::forward<Args>(args)...);
}
- // Destroys the last object allocated and frees any space it used in the SkFixedAlloc.
- void undo();
// Destroys all objects and frees all space in the SkFixedAlloc.
void reset();
private:
+ // Destroys the last object allocated and frees any space it used in the SkFixedAlloc.
+ void undo();
+
struct HeapAlloc {
void (*deleter)(char*);
char* ptr;
std::vector<HeapAlloc> fHeapAllocs;
};
+// SkArenaAlloc allocates object and destroys the allocated objects when destroyed. It's designed
+// to minimize the number of underlying block allocations. SkArenaAlloc allocates first out of an
+// (optional) user-provided block of memory, and when that's exhausted it allocates on the heap,
+// starting with an allocation of extraSize bytes. If your data (plus a small overhead) fits in
+// the user-provided block, SkArenaAlloc never uses the heap, and if it fits in extraSize bytes,
+// it'll use the heap only once. If you pass extraSize = 0, it allocates blocks for each call to
+// make<T>.
+//
+// Examples:
+//
+// char block[mostCasesSize];
+// SkArenaAlloc arena(block, almostAllCasesSize);
+//
+// If mostCasesSize is too large for the stack, you can use the following pattern.
+//
+// std::unique_ptr<char[]> block{new char[mostCasesSize]};
+// SkArenaAlloc arena(block.get(), mostCasesSize, almostAllCasesSize);
+//
+// If the program only sometimes allocates memory, use the following.
+//
+// SkArenaAlloc arena(nullptr, 0, almostAllCasesSize);
+//
+// The storage does not necessarily need to be on the stack. Embedding the storage in a class also
+// works.
+//
+// class Foo {
+// char storage[mostCasesSize];
+// SkArenaAlloc arena (storage, almostAllCasesSize);
+// };
+//
+// In addition, the system is optimized to handle POD data including arrays of PODs (where
+// POD is really data with no destructors). For POD data it has zero overhead per item, and a
+// typical block overhead of 8 bytes. For non-POD objects there is a per item overhead of 4 bytes.
+// For arrays of non-POD objects there is a per array overhead of typically 8 bytes. There is an
+// addition overhead when switching from POD data to non-POD data of typically 8 bytes.
+class SkArenaAlloc {
+public:
+ SkArenaAlloc(char* block, size_t size, size_t extraSize = 0);
+
+ template <size_t kSize>
+ SkArenaAlloc(char (&block)[kSize], size_t extraSize = 0)
+ : SkArenaAlloc(block, kSize, extraSize)
+ {}
+
+ ~SkArenaAlloc();
+
+ template <typename T, typename... Args>
+ T* make(Args&&... args) {
+ char* objStart;
+ if (skstd::is_trivially_destructible<T>::value) {
+ objStart = this->allocObject(sizeof(T), alignof(T));
+ fCursor = objStart + sizeof(T);
+ } else {
+ objStart = this->allocObjectWithFooter(sizeof(T) + sizeof(Footer), alignof(T));
+ size_t padding = objStart - fCursor;
+
+ // Advance to end of object to install footer.
+ fCursor = objStart + sizeof(T);
+ FooterAction* releaser = [](char* objEnd) {
+ char* objStart = objEnd - (sizeof(T) + sizeof(Footer));
+ ((T*)objStart)->~T();
+ return objStart;
+ };
+ this->installFooter(releaser, padding);
+ }
+
+ // This must be last to make objects with nested use of this allocator work.
+ return new(objStart) T(std::forward<Args>(args)...);
+ }
+
+ template <typename T>
+ T* makeArrayDefault(size_t count) {
+ T* array = (T*)this->commonArrayAlloc<T>(count);
+
+ // If T is primitive then no initialization takes place.
+ for (size_t i = 0; i < count; i++) {
+ new (&array[i]) T;
+ }
+ return array;
+ }
+
+ template <typename T>
+ T* makeArray(size_t count) {
+ T* array = (T*)this->commonArrayAlloc<T>(count);
+
+ // If T is primitive then the memory is initialized. For example, an array of chars will
+ // be zeroed.
+ for (size_t i = 0; i < count; i++) {
+ new (&array[i]) T();
+ }
+ return array;
+ }
+
+ // Destroy all allocated objects, free any heap allocations.
+ void reset();
+
+private:
+ using Footer = int32_t;
+ using FooterAction = char* (char*);
+
+ void installFooter(FooterAction* releaser, ptrdiff_t padding);
+
+ // N.B. Action is different than FooterAction. FooterAction expects the end of the Footer,
+ // and returns the start of the object. An Action expects the end of the *Object* and returns
+ // the start of the object.
+ template<typename Action>
+ void installIntFooter(ptrdiff_t size, ptrdiff_t padding) {
+ if (SkTFitsIn<int32_t>(size)) {
+ int32_t smallSize = static_cast<int32_t>(size);
+ memmove(fCursor, &smallSize, sizeof(int32_t));
+ fCursor += sizeof(int32_t);
+ this->installFooter(
+ [](char* footerEnd) {
+ char* objEnd = footerEnd - (sizeof(Footer) + sizeof(int32_t));
+ int32_t data;
+ memmove(&data, objEnd, sizeof(int32_t));
+ return Action()(objEnd, data);
+ },
+ padding);
+ } else {
+ memmove(fCursor, &size, sizeof(ptrdiff_t));
+ fCursor += sizeof(ptrdiff_t);
+ this->installFooter(
+ [](char* footerEnd) {
+ char* objEnd = footerEnd - (sizeof(Footer) + sizeof(ptrdiff_t));
+ ptrdiff_t data;
+ memmove(&data, objEnd, sizeof(ptrdiff_t));
+ return Action()(objEnd, data);
+ },
+ padding);
+ }
+ }
+
+ void ensureSpace(size_t size, size_t alignment);
+
+ char* allocObject(size_t size, size_t alignment);
+
+ char* allocObjectWithFooter(size_t sizeIncludingFooter, size_t alignment);
+
+ template <typename T>
+ char* commonArrayAlloc(size_t count) {
+ char* objStart;
+ size_t arraySize = count * sizeof(T);
+
+ SkASSERT(arraySize > 0);
+
+ if (skstd::is_trivially_destructible<T>::value) {
+ objStart = this->allocObject(arraySize, alignof(T));
+ fCursor = objStart + arraySize;
+ } else {
+ size_t countSize = SkTFitsIn<int32_t>(count) ? sizeof(int32_t) : sizeof(ptrdiff_t);
+ size_t totalSize = arraySize + sizeof(Footer) + countSize;
+ objStart = this->allocObjectWithFooter(totalSize, alignof(T));
+ size_t padding = objStart - fCursor;
+
+ // Advance to end of array to install footer.?
+ fCursor = objStart + arraySize;
+ this->installIntFooter<ArrayDestructor<T>> (count, padding);
+ }
+
+ return objStart;
+ }
+
+ char* callFooterAction(char* end);
+
+ static char* EndChain(char*);
+
+ template<typename T>
+ struct ArrayDestructor {
+ char* operator()(char* objEnd, ptrdiff_t count) {
+ char* objStart = objEnd - count * sizeof(T);
+ T* array = (T*) objStart;
+ for (int i = 0; i < count; i++) {
+ array[i].~T();
+ }
+ return objStart;
+ }
+ };
+
+ char* fDtorCursor;
+ char* fCursor;
+ char* fEnd;
+ size_t fExtraSize;
+};
+
#endif//SkFixedAlloc_DEFINED
SkShader::TileMode xTile, SkShader::TileMode yTile,
SkColor paintColor,
const SkPixmap& srcPixmap,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
SkISize dimensions = srcPixmap.info().dimensions();
const SkImageInfo& srcImageInfo = srcPixmap.info();
const SkPixmap& srcPixmap,
SkBlendMode mode,
const SkImageInfo& dstInfo,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
SkASSERT(mode == SkBlendMode::kSrc || mode == SkBlendMode::kSrcOver);
SkASSERT(srcPixmap.info().colorType() == dstInfo.colorType()
float finalAlpha,
SkBlendMode blendMode,
const SkImageInfo& dstInfo,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
if (blendMode == SkBlendMode::kSrcOver && srcPixmap.info().alphaType() == kOpaque_SkAlphaType) {
blendMode = SkBlendMode::kSrc;
SkLinearBitmapPipeline::chooseMatrix(
PointProcessorInterface* next,
const SkMatrix& inverse,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
if (inverse.hasPerspective()) {
auto matrixStage = allocator->make<PerspectiveMatrix<>>(
SkVector{inverse.getPerspX(), inverse.getPerspY()},
inverse.get(SkMatrix::kMPersp2));
fMatrixStageCloner =
- [matrixStage](PointProcessorInterface* cloneNext, SkFallbackAlloc* memory) {
+ [matrixStage](PointProcessorInterface* cloneNext, SkArenaAlloc* memory) {
return memory->make<PerspectiveMatrix<>>(cloneNext, matrixStage);
};
return matrixStage;
SkVector{inverse.getScaleX(), inverse.getScaleY()},
SkVector{inverse.getSkewX(), inverse.getSkewY()});
fMatrixStageCloner =
- [matrixStage](PointProcessorInterface* cloneNext, SkFallbackAlloc* memory) {
+ [matrixStage](PointProcessorInterface* cloneNext, SkArenaAlloc* memory) {
return memory->make<AffineMatrix<>>(cloneNext, matrixStage);
};
return matrixStage;
SkVector{inverse.getTranslateX(), inverse.getTranslateY()},
SkVector{inverse.getScaleX(), inverse.getScaleY()});
fMatrixStageCloner =
- [matrixStage](PointProcessorInterface* cloneNext, SkFallbackAlloc* memory) {
+ [matrixStage](PointProcessorInterface* cloneNext, SkArenaAlloc* memory) {
return memory->make<ScaleMatrix<>>(cloneNext, matrixStage);
};
return matrixStage;
next,
SkVector{inverse.getTranslateX(), inverse.getTranslateY()});
fMatrixStageCloner =
- [matrixStage](PointProcessorInterface* cloneNext, SkFallbackAlloc* memory) {
+ [matrixStage](PointProcessorInterface* cloneNext, SkArenaAlloc* memory) {
return memory->make<TranslateMatrix<>>(cloneNext, matrixStage);
};
return matrixStage;
} else {
- fMatrixStageCloner = [](PointProcessorInterface* cloneNext, SkFallbackAlloc* memory) {
+ fMatrixStageCloner = [](PointProcessorInterface* cloneNext, SkArenaAlloc* memory) {
return cloneNext;
};
return next;
SkLinearBitmapPipeline::PointProcessorInterface* SkLinearBitmapPipeline::createTiler(
SampleProcessorInterface* next,
SkISize dimensions,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
auto tilerStage = allocator->make<Tiler>(next, dimensions);
fTileStageCloner =
[tilerStage](SampleProcessorInterface* cloneNext,
- SkFallbackAlloc* memory) -> PointProcessorInterface* {
+ SkArenaAlloc* memory) -> PointProcessorInterface* {
return memory->make<Tiler>(cloneNext, tilerStage);
};
return tilerStage;
SampleProcessorInterface* next,
SkShader::TileMode yMode,
SkISize dimensions,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
switch (yMode) {
case SkShader::kClamp_TileMode: {
SkShader::TileMode yMode,
SkFilterQuality filterQuality,
SkScalar dx,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
switch (xMode) {
case SkShader::kClamp_TileMode:
SkLinearBitmapPipeline::PixelAccessorInterface*
SkLinearBitmapPipeline::chooseSpecificAccessor(
const SkPixmap& srcPixmap,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
if (srcPixmap.info().gammaCloseToSRGB()) {
using Accessor = PixelAccessor<colorType, kSRGB_SkGammaType>;
SkLinearBitmapPipeline::PixelAccessorInterface* SkLinearBitmapPipeline::choosePixelAccessor(
const SkPixmap& srcPixmap,
const SkColor A8TintColor,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
const SkImageInfo& imageInfo = srcPixmap.info();
SkShader::TileMode xTile, SkShader::TileMode yTile,
const SkPixmap& srcPixmap,
const SkColor A8TintColor,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
const SkImageInfo& imageInfo = srcPixmap.info();
SkISize dimensions = imageInfo.dimensions();
Blender* SkLinearBitmapPipeline::chooseBlenderForShading(
SkAlphaType alphaType,
float postAlpha,
- SkFallbackAlloc* allocator)
+ SkArenaAlloc* allocator)
{
if (alphaType == kUnpremul_SkAlphaType) {
return allocator->make<SrcFPPixel<kUnpremul_SkAlphaType>>(postAlpha);
SkShader::TileMode xTile, SkShader::TileMode yTile,
SkColor paintColor,
const SkPixmap& srcPixmap,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
SkLinearBitmapPipeline(
const SkLinearBitmapPipeline& pipeline,
const SkPixmap& srcPixmap,
SkBlendMode,
const SkImageInfo& dstInfo,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
static SkLinearBitmapPipeline* ClonePipelineForBlitting(
const SkLinearBitmapPipeline& pipeline,
float finalAlpha,
SkBlendMode,
const SkImageInfo& dstInfo,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
~SkLinearBitmapPipeline();
class PixelAccessorInterface;
using MatrixCloner =
- std::function<PointProcessorInterface* (PointProcessorInterface*, SkFallbackAlloc*)>;
+ std::function<PointProcessorInterface* (PointProcessorInterface*, SkArenaAlloc*)>;
using TilerCloner =
- std::function<PointProcessorInterface* (SampleProcessorInterface*, SkFallbackAlloc*)>;
+ std::function<PointProcessorInterface* (SampleProcessorInterface*, SkArenaAlloc*)>;
PointProcessorInterface* chooseMatrix(
PointProcessorInterface* next,
const SkMatrix& inverse,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
template <typename Tiler>
PointProcessorInterface* createTiler(SampleProcessorInterface* next, SkISize dimensions,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
template <typename XStrategy>
PointProcessorInterface* chooseTilerYMode(
SampleProcessorInterface* next, SkShader::TileMode yMode, SkISize dimensions,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
PointProcessorInterface* chooseTiler(
SampleProcessorInterface* next,
SkShader::TileMode xMode, SkShader::TileMode yMode,
SkFilterQuality filterQuality,
SkScalar dx,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
template <SkColorType colorType>
PixelAccessorInterface* chooseSpecificAccessor(const SkPixmap& srcPixmap,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
PixelAccessorInterface* choosePixelAccessor(
const SkPixmap& srcPixmap,
const SkColor A8TintColor,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
SampleProcessorInterface* chooseSampler(
BlendProcessorInterface* next,
SkShader::TileMode xTile, SkShader::TileMode yTile,
const SkPixmap& srcPixmap,
const SkColor A8TintColor,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
BlendProcessorInterface* chooseBlenderForShading(
SkAlphaType alphaType,
float postAlpha,
- SkFallbackAlloc* allocator);
+ SkArenaAlloc* allocator);
PointProcessorInterface* fFirstStage;
MatrixCloner fMatrixStageCloner;
static int created, destroyed;
struct Foo {
- Foo(int X, float Y) : x(X), y(Y) { created++; }
+ Foo() : x(-2), y(-3.0f) { created++; }
+ Foo(int X, float Y) : x(X), y(Y) { created++; }
~Foo() { destroyed++; }
int x;
REPORTER_ASSERT(r, !in_buf(big));
REPORTER_ASSERT(r, !in_buf(smallB));
}
+
+struct WithDtor {
+ ~WithDtor() { }
+};
+
+DEF_TEST(ArenaAlloc, r) {
+
+ {
+ created = 0;
+ destroyed = 0;
+
+ SkArenaAlloc arena{nullptr, 0};
+ REPORTER_ASSERT(r, *arena.make<int>(3) == 3);
+ Foo* foo = arena.make<Foo>(3, 4.0f);
+ REPORTER_ASSERT(r, foo->x == 3);
+ REPORTER_ASSERT(r, foo->y == 4.0f);
+ REPORTER_ASSERT(r, created == 1);
+ REPORTER_ASSERT(r, destroyed == 0);
+ arena.makeArrayDefault<int>(10);
+ int* zeroed = arena.makeArray<int>(10);
+ for (int i = 0; i < 10; i++) {
+ REPORTER_ASSERT(r, zeroed[i] == 0);
+ }
+ Foo* fooArray = arena.makeArrayDefault<Foo>(10);
+ REPORTER_ASSERT(r, fooArray[3].x == -2);
+ REPORTER_ASSERT(r, fooArray[4].y == -3.0f);
+ REPORTER_ASSERT(r, created == 11);
+ REPORTER_ASSERT(r, destroyed == 0);
+ arena.make<typename std::aligned_storage<10,8>::type>();
+ }
+ REPORTER_ASSERT(r, created == 11);
+ REPORTER_ASSERT(r, destroyed == 11);
+
+ {
+ created = 0;
+ destroyed = 0;
+ char block[1024];
+ SkArenaAlloc arena{block};
+
+ REPORTER_ASSERT(r, *arena.make<int>(3) == 3);
+ Foo* foo = arena.make<Foo>(3, 4.0f);
+ REPORTER_ASSERT(r, foo->x == 3);
+ REPORTER_ASSERT(r, foo->y == 4.0f);
+ REPORTER_ASSERT(r, created == 1);
+ REPORTER_ASSERT(r, destroyed == 0);
+ arena.makeArrayDefault<int>(10);
+ int* zeroed = arena.makeArray<int>(10);
+ for (int i = 0; i < 10; i++) {
+ REPORTER_ASSERT(r, zeroed[i] == 0);
+ }
+ Foo* fooArray = arena.makeArrayDefault<Foo>(10);
+ REPORTER_ASSERT(r, fooArray[3].x == -2);
+ REPORTER_ASSERT(r, fooArray[4].y == -3.0f);
+ REPORTER_ASSERT(r, created == 11);
+ REPORTER_ASSERT(r, destroyed == 0);
+ arena.make<typename std::aligned_storage<10,8>::type>();
+ }
+ REPORTER_ASSERT(r, created == 11);
+ REPORTER_ASSERT(r, destroyed == 11);
+
+ {
+ created = 0;
+ destroyed = 0;
+ std::unique_ptr<char[]> block{new char[1024]};
+ SkArenaAlloc arena{block.get(), 1024};
+
+ REPORTER_ASSERT(r, *arena.make<int>(3) == 3);
+ Foo* foo = arena.make<Foo>(3, 4.0f);
+ REPORTER_ASSERT(r, foo->x == 3);
+ REPORTER_ASSERT(r, foo->y == 4.0f);
+ REPORTER_ASSERT(r, created == 1);
+ REPORTER_ASSERT(r, destroyed == 0);
+ arena.makeArrayDefault<int>(10);
+ int* zeroed = arena.makeArray<int>(10);
+ for (int i = 0; i < 10; i++) {
+ REPORTER_ASSERT(r, zeroed[i] == 0);
+ }
+ Foo* fooArray = arena.makeArrayDefault<Foo>(10);
+ REPORTER_ASSERT(r, fooArray[3].x == -2);
+ REPORTER_ASSERT(r, fooArray[4].y == -3.0f);
+ REPORTER_ASSERT(r, created == 11);
+ REPORTER_ASSERT(r, destroyed == 0);
+ arena.make<typename std::aligned_storage<10,8>::type>();
+ }
+ REPORTER_ASSERT(r, created == 11);
+ REPORTER_ASSERT(r, destroyed == 11);
+
+}
projects / platform / upstream / libSkiaSharp.git / commitdiff