ADHOC/replicant-frameworks_native
3
0
Fork 0
Code Issues 7 Pull Requests Releases Wiki Activity

Use ashmem for CursorWindows.

Browse Source 
Bug: 5332296

The memory dealer introduces additional delays for reclaiming
the memory owned by CursorWindows because the Binder object must
be finalized.  Using ashmem instead gives CursorWindow more
direct control over the lifetime of the shared memory region.

The provider now allocates the CursorWindows and returns them
to clients with a read-only protection bit set on the ashmem
region.

Improved the encapsulation of CursorWindow.  Callers shouldn't
need to care about details like how string fields are allocated.

Removed the compile-time configuration of string and numeric
storage modes to remove some dead weight.

Change-Id: I07c2bc2a9c573d7e435dcaecd269d25ea9807acd
This commit is contained in:
Jeff Brown 2011-10-10 14:50:10 -07:00
parent 3829bc3c35
commit ec4e0063a1
3 changed files with 378 additions and 431 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

299
include/binder/CursorWindow.h
View File

@ -21,18 +21,8 @@
#include <stddef.h> #include <stddef.h>
#include <stdint.h> #include <stdint.h>
#include <binder/IMemory.h> #include <binder/Parcel.h>
#include <utils/RefBase.h> #include <utils/String8.h>
#define DEFAULT_WINDOW_SIZE 4096
#define WINDOW_ALLOCATION_SIZE 4096
#define ROW_SLOT_CHUNK_NUM_ROWS 16
// Row slots are allocated in chunks of ROW_SLOT_CHUNK_NUM_ROWS,
// with an offset after the rows that points to the next chunk
#define ROW_SLOT_CHUNK_SIZE ((ROW_SLOT_CHUNK_NUM_ROWS * sizeof(row_slot_t)) + sizeof(uint32_t))
#if LOG_NDEBUG #if LOG_NDEBUG
@ -46,176 +36,157 @@
#endif #endif
// When defined to true strings are stored as UTF8, otherwise they're UTF16
#define WINDOW_STORAGE_UTF8 1
// When defined to true numberic values are stored inline in the field_slot_t, otherwise they're allocated in the window
#define WINDOW_STORAGE_INLINE_NUMERICS 1
namespace android { namespace android {
typedef struct
{
uint32_t numRows;
uint32_t numColumns;
} window_header_t;
typedef struct
{
uint32_t offset;
} row_slot_t;
typedef struct
{
uint8_t type;
union {
double d;
int64_t l;
struct {
uint32_t offset;
uint32_t size;
} buffer;
} data;
} __attribute__((packed)) field_slot_t;
#define FIELD_TYPE_NULL 0
#define FIELD_TYPE_INTEGER 1
#define FIELD_TYPE_FLOAT 2
#define FIELD_TYPE_STRING 3
#define FIELD_TYPE_BLOB 4
/** /**
* This class stores a set of rows from a database in a buffer. The begining of the * This class stores a set of rows from a database in a buffer. The begining of the
* window has first chunk of row_slot_ts, which are offsets to the row directory, followed by * window has first chunk of RowSlots, which are offsets to the row directory, followed by
* an offset to the next chunk in a linked-list of additional chunk of row_slot_ts in case * an offset to the next chunk in a linked-list of additional chunk of RowSlots in case
* the pre-allocated chunk isn't big enough to refer to all rows. Each row directory has a * the pre-allocated chunk isn't big enough to refer to all rows. Each row directory has a
* field_slot_t per column, which has the size, offset, and type of the data for that field. * FieldSlot per column, which has the size, offset, and type of the data for that field.
* Note that the data types come from sqlite3.h. * Note that the data types come from sqlite3.h.
*
* Strings are stored in UTF-8.
*/ */
class CursorWindow class CursorWindow {
{ CursorWindow(const String8& name, int ashmemFd,
void* data, size_t size, bool readOnly);
public: public:
CursorWindow(size_t maxSize); /* Field types. */
CursorWindow(){} enum {
bool setMemory(const sp<IMemory>&); FIELD_TYPE_NULL = 0,
~CursorWindow(); FIELD_TYPE_INTEGER = 1,
FIELD_TYPE_FLOAT = 2,
FIELD_TYPE_STRING = 3,
FIELD_TYPE_BLOB = 4,
};
bool initBuffer(bool localOnly); /* Opaque type that describes a field slot. */
sp<IMemory> getMemory() {return mMemory;} struct FieldSlot {
private:
int32_t type;
union {
double d;
int64_t l;
struct {
uint32_t offset;
uint32_t size;
} buffer;
} data;
size_t size() {return mSize;} friend class CursorWindow;
uint8_t * data() {return mData;} } __attribute((packed));
uint32_t getNumRows() {return mHeader->numRows;}
uint32_t getNumColumns() {return mHeader->numColumns;}
void freeLastRow() {
if (mHeader->numRows > 0) {
mHeader->numRows--;
}
}
bool setNumColumns(uint32_t numColumns)
{
uint32_t cur = mHeader->numColumns;
if (cur > 0 && cur != numColumns) {
LOGE("Trying to go from %d columns to %d", cur, numColumns);
return false;
}
mHeader->numColumns = numColumns;
return true;
}
int32_t freeSpace(); ~CursorWindow();
void clear(); static status_t create(const String8& name, size_t size, bool localOnly,
CursorWindow** outCursorWindow);
static status_t createFromParcel(Parcel* parcel, CursorWindow** outCursorWindow);
/** status_t writeToParcel(Parcel* parcel);
* Allocate a row slot and its directory. The returned
* pointer points to the begining of the row's directory
* or NULL if there wasn't room. The directory is
* initialied with NULL entries for each field.
*/
field_slot_t * allocRow();
/** inline String8 name() { return mName; }
* Allocate a portion of the window. Returns the offset inline size_t size() { return mSize; }
* of the allocation, or 0 if there isn't enough space. inline size_t freeSpace() { return mSize - mHeader->freeOffset; }
* If aligned is true, the allocation gets 4 byte alignment. inline uint32_t getNumRows() { return mHeader->numRows; }
*/ inline uint32_t getNumColumns() { return mHeader->numColumns; }
uint32_t alloc(size_t size, bool aligned = false);
/** status_t clear();
* Copy data into the window at the given offset. status_t setNumColumns(uint32_t numColumns);
*/
void copyIn(uint32_t offset, uint8_t const * data, size_t size);
void copyIn(uint32_t offset, int64_t data);
void copyIn(uint32_t offset, double data);
void copyOut(uint32_t offset, uint8_t * data, size_t size);
int64_t copyOutLong(uint32_t offset);
double copyOutDouble(uint32_t offset);
bool putLong(unsigned int row, unsigned int col, int64_t value);
bool putDouble(unsigned int row, unsigned int col, double value);
bool putNull(unsigned int row, unsigned int col);
bool getLong(unsigned int row, unsigned int col, int64_t * valueOut);
bool getDouble(unsigned int row, unsigned int col, double * valueOut);
bool getNull(unsigned int row, unsigned int col, bool * valueOut);
uint8_t * offsetToPtr(uint32_t offset) {return mData + offset;}
row_slot_t * allocRowSlot();
row_slot_t * getRowSlot(int row);
/**
* return NULL if Failed to find rowSlot or
* Invalid rowSlot
*/
field_slot_t * getFieldSlotWithCheck(int row, int column);
field_slot_t * getFieldSlot(int row, int column)
{
int fieldDirOffset = getRowSlot(row)->offset;
return ((field_slot_t *)offsetToPtr(fieldDirOffset)) + column;
}
int64_t getFieldSlotValueLong(field_slot_t* fieldSlot) {
#if WINDOW_STORAGE_INLINE_NUMERICS
return fieldSlot->data.l;
#else
return copyOutLong(fieldSlot->data.buffer.offset);
#endif
}
double getFieldSlotValueDouble(field_slot_t* fieldSlot) {
#if WINDOW_STORAGE_INLINE_NUMERICS
return fieldSlot->data.d;
#else
return copyOutDouble(fieldSlot->data.buffer.offset);
#endif
}
#if WINDOW_STORAGE_UTF8
char* getFieldSlotValueString(field_slot_t* fieldSlot) {
return reinterpret_cast<char*>(offsetToPtr(fieldSlot->data.buffer.offset));
}
#else
char16_t* getFieldSlotValueString(field_slot_t* fieldSlot) {
return reinterpret_cast<char16_t*>(offsetToPtr(fieldSlot->data.buffer.offset));
}
#endif
private:
uint8_t * mData;
size_t mSize;
size_t mMaxSize;
window_header_t * mHeader;
sp<IMemory> mMemory;
/** /**
* Offset of the lowest unused data byte in the array. * Allocate a row slot and its directory.
* The row is initialized will null entries for each field.
*/ */
uint32_t mFreeOffset; status_t allocRow();
status_t freeLastRow();
status_t putBlob(uint32_t row, uint32_t column, const void* value, size_t size);
status_t putString(uint32_t row, uint32_t column, const char* value, size_t sizeIncludingNull);
status_t putLong(uint32_t row, uint32_t column, int64_t value);
status_t putDouble(uint32_t row, uint32_t column, double value);
status_t putNull(uint32_t row, uint32_t column);
/**
* Gets the field slot at the specified row and column.
* Returns null if the requested row or column is not in the window.
*/
FieldSlot* getFieldSlot(uint32_t row, uint32_t column);
inline int32_t getFieldSlotType(FieldSlot* fieldSlot) {
return fieldSlot->type;
}
inline int64_t getFieldSlotValueLong(FieldSlot* fieldSlot) {
return fieldSlot->data.l;
}
inline double getFieldSlotValueDouble(FieldSlot* fieldSlot) {
return fieldSlot->data.d;
}
inline const char* getFieldSlotValueString(FieldSlot* fieldSlot,
size_t* outSizeIncludingNull) {
*outSizeIncludingNull = fieldSlot->data.buffer.size;
return static_cast<char*>(offsetToPtr(fieldSlot->data.buffer.offset));
}
inline const void* getFieldSlotValueBlob(FieldSlot* fieldSlot, size_t* outSize) {
*outSize = fieldSlot->data.buffer.size;
return offsetToPtr(fieldSlot->data.buffer.offset);
}
private:
static const size_t ROW_SLOT_CHUNK_NUM_ROWS = 100;
struct Header {
// Offset of the lowest unused byte in the window.
uint32_t freeOffset;
// Offset of the first row slot chunk.
uint32_t firstChunkOffset;
uint32_t numRows;
uint32_t numColumns;
};
struct RowSlot {
uint32_t offset;
};
struct RowSlotChunk {
RowSlot slots[ROW_SLOT_CHUNK_NUM_ROWS];
uint32_t nextChunkOffset;
};
String8 mName;
int mAshmemFd;
void* mData;
size_t mSize;
bool mReadOnly;
Header* mHeader;
inline void* offsetToPtr(uint32_t offset) {
return static_cast<uint8_t*>(mData) + offset;
}
inline uint32_t offsetFromPtr(void* ptr) {
return static_cast<uint8_t*>(ptr) - static_cast<uint8_t*>(mData);
}
/**
* Allocate a portion of the window. Returns the offset
* of the allocation, or 0 if there isn't enough space.
* If aligned is true, the allocation gets 4 byte alignment.
*/
uint32_t alloc(size_t size, bool aligned = false);
RowSlot* getRowSlot(uint32_t row);
RowSlot* allocRowSlot();
status_t putBlobOrString(uint32_t row, uint32_t column,
const void* value, size_t size, int32_t type);
}; };
}; // namespace android }; // namespace android

506
libs/binder/CursorWindow.cpp
View File

@ -19,8 +19,9 @@
#include <utils/Log.h> #include <utils/Log.h>
#include <binder/CursorWindow.h> #include <binder/CursorWindow.h>
#include <binder/MemoryHeapBase.h>
#include <binder/MemoryBase.h> #include <cutils/ashmem.h>
#include <sys/mman.h>
#include <assert.h> #include <assert.h>
#include <string.h> #include <string.h>
@ -28,350 +29,325 @@
namespace android { namespace android {
CursorWindow::CursorWindow(size_t maxSize) : CursorWindow::CursorWindow(const String8& name, int ashmemFd,
mMaxSize(maxSize) void* data, size_t size, bool readOnly) :
{ mName(name), mAshmemFd(ashmemFd), mData(data), mSize(size), mReadOnly(readOnly) {
mHeader = static_cast<Header*>(mData);
} }
bool CursorWindow::setMemory(const sp<IMemory>& memory) CursorWindow::~CursorWindow() {
{ ::munmap(mData, mSize);
mMemory = memory; ::close(mAshmemFd);
mData = (uint8_t *) memory->pointer();
if (mData == NULL) {
return false;
}
mHeader = (window_header_t *) mData;
// Make the window read-only
ssize_t size = memory->size();
mSize = size;
mMaxSize = size;
mFreeOffset = size;
LOG_WINDOW("Created CursorWindow from existing IMemory: mFreeOffset = %d, numRows = %d, numColumns = %d, mSize = %d, mMaxSize = %d, mData = %p", mFreeOffset, mHeader->numRows, mHeader->numColumns, mSize, mMaxSize, mData);
return true;
} }
bool CursorWindow::initBuffer(bool localOnly) status_t CursorWindow::create(const String8& name, size_t size, bool localOnly,
{ CursorWindow** outCursorWindow) {
//TODO Use a non-memory dealer mmap region for localOnly String8 ashmemName("CursorWindow: ");
ashmemName.append(name);
ashmemName.append(localOnly ? " (local)" : " (remote)");
sp<MemoryHeapBase> heap; status_t result;
heap = new MemoryHeapBase(mMaxSize, 0, "CursorWindow"); int ashmemFd = ashmem_create_region(ashmemName.string(), size);
if (heap != NULL) { if (ashmemFd < 0) {
mMemory = new MemoryBase(heap, 0, mMaxSize); result = -errno;
if (mMemory != NULL) {
mData = (uint8_t *) mMemory->pointer();
if (mData) {
mHeader = (window_header_t *) mData;
mSize = mMaxSize;
// Put the window into a clean state
clear();
LOG_WINDOW("Created CursorWindow with new MemoryDealer: mFreeOffset = %d, mSize = %d, mMaxSize = %d, mData = %p", mFreeOffset, mSize, mMaxSize, mData);
return true;
}
}
LOGE("CursorWindow heap allocation failed");
return false;
} else { } else {
LOGE("failed to create the CursorWindow heap"); result = ashmem_set_prot_region(ashmemFd, PROT_READ | PROT_WRITE);
return false; if (result >= 0) {
void* data = ::mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, ashmemFd, 0);
if (data == MAP_FAILED) {
result = -errno;
} else {
result = ashmem_set_prot_region(ashmemFd, PROT_READ);
if (result >= 0) {
CursorWindow* window = new CursorWindow(name, ashmemFd,
data, size, false /*readOnly*/);
result = window->clear();
if (!result) {
LOG_WINDOW("Created new CursorWindow: freeOffset=%d, "
"numRows=%d, numColumns=%d, mSize=%d, mData=%p",
window->mHeader->freeOffset,
window->mHeader->numRows,
window->mHeader->numColumns,
window->mSize, window->mData);
*outCursorWindow = window;
return OK;
}
delete window;
}
}
::munmap(data, size);
}
::close(ashmemFd);
} }
*outCursorWindow = NULL;
return result;
} }
CursorWindow::~CursorWindow() status_t CursorWindow::createFromParcel(Parcel* parcel, CursorWindow** outCursorWindow) {
{ String8 name = parcel->readString8();
// Everything that matters is a smart pointer
status_t result;
int ashmemFd = parcel->readFileDescriptor();
if (ashmemFd == int(BAD_TYPE)) {
result = BAD_TYPE;
} else {
ssize_t size = ashmem_get_size_region(ashmemFd);
if (size < 0) {
result = UNKNOWN_ERROR;
} else {
int dupAshmemFd = ::dup(ashmemFd);
if (dupAshmemFd < 0) {
result = -errno;
} else {
void* data = ::mmap(NULL, size, PROT_READ, MAP_SHARED, dupAshmemFd, 0);
if (data == MAP_FAILED) {
result = -errno;
} else {
CursorWindow* window = new CursorWindow(name, dupAshmemFd,
data, size, true /*readOnly*/);
LOG_WINDOW("Created CursorWindow from parcel: freeOffset=%d, "
"numRows=%d, numColumns=%d, mSize=%d, mData=%p",
window->mHeader->freeOffset,
window->mHeader->numRows,
window->mHeader->numColumns,
window->mSize, window->mData);
*outCursorWindow = window;
return OK;
}
::close(dupAshmemFd);
}
}
}
*outCursorWindow = NULL;
return result;
} }
void CursorWindow::clear() status_t CursorWindow::writeToParcel(Parcel* parcel) {
{ status_t status = parcel->writeString8(mName);
if (!status) {
status = parcel->writeDupFileDescriptor(mAshmemFd);
}
return status;
}
status_t CursorWindow::clear() {
if (mReadOnly) {
return INVALID_OPERATION;
}
mHeader->freeOffset = sizeof(Header) + sizeof(RowSlotChunk);
mHeader->firstChunkOffset = sizeof(Header);
mHeader->numRows = 0; mHeader->numRows = 0;
mHeader->numColumns = 0; mHeader->numColumns = 0;
mFreeOffset = sizeof(window_header_t) + ROW_SLOT_CHUNK_SIZE;
// Mark the first chunk's next 'pointer' as null RowSlotChunk* firstChunk = static_cast<RowSlotChunk*>(offsetToPtr(mHeader->firstChunkOffset));
*((uint32_t *)(mData + mFreeOffset - sizeof(uint32_t))) = 0; firstChunk->nextChunkOffset = 0;
return OK;
} }
int32_t CursorWindow::freeSpace() status_t CursorWindow::setNumColumns(uint32_t numColumns) {
{ if (mReadOnly) {
int32_t freeSpace = mSize - mFreeOffset; return INVALID_OPERATION;
if (freeSpace < 0) {
freeSpace = 0;
} }
return freeSpace;
uint32_t cur = mHeader->numColumns;
if ((cur > 0 || mHeader->numRows > 0) && cur != numColumns) {
LOGE("Trying to go from %d columns to %d", cur, numColumns);
return INVALID_OPERATION;
}
mHeader->numColumns = numColumns;
return OK;
} }
field_slot_t * CursorWindow::allocRow() status_t CursorWindow::allocRow() {
{ if (mReadOnly) {
return INVALID_OPERATION;
}
// Fill in the row slot // Fill in the row slot
row_slot_t * rowSlot = allocRowSlot(); RowSlot* rowSlot = allocRowSlot();
if (rowSlot == NULL) { if (rowSlot == NULL) {
return NULL; return NO_MEMORY;
} }
// Allocate the slots for the field directory // Allocate the slots for the field directory
size_t fieldDirSize = mHeader->numColumns * sizeof(field_slot_t); size_t fieldDirSize = mHeader->numColumns * sizeof(FieldSlot);
uint32_t fieldDirOffset = alloc(fieldDirSize); uint32_t fieldDirOffset = alloc(fieldDirSize, true /*aligned*/);
if (!fieldDirOffset) { if (!fieldDirOffset) {
mHeader->numRows--; mHeader->numRows--;
LOG_WINDOW("The row failed, so back out the new row accounting from allocRowSlot %d", mHeader->numRows); LOG_WINDOW("The row failed, so back out the new row accounting "
return NULL; "from allocRowSlot %d", mHeader->numRows);
return NO_MEMORY;
} }
field_slot_t * fieldDir = (field_slot_t *)offsetToPtr(fieldDirOffset); FieldSlot* fieldDir = static_cast<FieldSlot*>(offsetToPtr(fieldDirOffset));
memset(fieldDir, 0x0, fieldDirSize); memset(fieldDir, 0, fieldDirSize);
LOG_WINDOW("Allocated row %u, rowSlot is at offset %u, fieldDir is %d bytes at offset %u\n", (mHeader->numRows - 1), ((uint8_t *)rowSlot) - mData, fieldDirSize, fieldDirOffset); LOG_WINDOW("Allocated row %u, rowSlot is at offset %u, fieldDir is %d bytes at offset %u\n",
mHeader->numRows - 1, offsetFromPtr(rowSlot), fieldDirSize, fieldDirOffset);
rowSlot->offset = fieldDirOffset; rowSlot->offset = fieldDirOffset;
return OK;
return fieldDir;
} }
uint32_t CursorWindow::alloc(size_t requestedSize, bool aligned) status_t CursorWindow::freeLastRow() {
{ if (mReadOnly) {
int32_t size; return INVALID_OPERATION;
}
if (mHeader->numRows > 0) {
mHeader->numRows--;
}
return OK;
}
uint32_t CursorWindow::alloc(size_t size, bool aligned) {
uint32_t padding; uint32_t padding;
if (aligned) { if (aligned) {
// 4 byte alignment // 4 byte alignment
padding = 4 - (mFreeOffset & 0x3); padding = (~mHeader->freeOffset + 1) & 3;
} else { } else {
padding = 0; padding = 0;
} }
size = requestedSize + padding; uint32_t offset = mHeader->freeOffset + padding;
uint32_t nextFreeOffset = offset + size;
if (size > freeSpace()) { if (nextFreeOffset > mSize) {
LOGV("need to grow: mSize = %d, size = %d, freeSpace() = %d, numRows = %d", mSize, size, LOGE("Window is full: requested allocation %d bytes, "
freeSpace(), mHeader->numRows); "free space %d bytes, window size %d bytes",
// Only grow the window if the first row doesn't fit size, freeSpace(), mSize);
if (mHeader->numRows > 1) { return 0;
LOGV("not growing since there are already %d row(s), max size %d", mHeader->numRows,
mMaxSize);
return 0;
}
// Find a new size that will fit the allocation
int allocated = mSize - freeSpace();
int newSize = mSize + WINDOW_ALLOCATION_SIZE;
while (size > (newSize - allocated)) {
newSize += WINDOW_ALLOCATION_SIZE;
if (newSize > mMaxSize) {
LOGE("Attempting to grow window beyond max size (%d)", mMaxSize);
return 0;
}
}
LOG_WINDOW("found size %d", newSize);
mSize = newSize;
} }
uint32_t offset = mFreeOffset + padding; mHeader->freeOffset = nextFreeOffset;
mFreeOffset += size;
return offset; return offset;
} }
row_slot_t * CursorWindow::getRowSlot(int row) CursorWindow::RowSlot* CursorWindow::getRowSlot(uint32_t row) {
{ uint32_t chunkPos = row;
LOG_WINDOW("enter getRowSlot current row num %d, this row %d", mHeader->numRows, row); RowSlotChunk* chunk = static_cast<RowSlotChunk*>(
int chunkNum = row / ROW_SLOT_CHUNK_NUM_ROWS; offsetToPtr(mHeader->firstChunkOffset));
int chunkPos = row % ROW_SLOT_CHUNK_NUM_ROWS; while (chunkPos >= ROW_SLOT_CHUNK_NUM_ROWS) {
int chunkPtrOffset = sizeof(window_header_t) + ROW_SLOT_CHUNK_SIZE - sizeof(uint32_t); chunk = static_cast<RowSlotChunk*>(offsetToPtr(chunk->nextChunkOffset));
uint8_t * rowChunk = mData + sizeof(window_header_t); chunkPos -= ROW_SLOT_CHUNK_NUM_ROWS;
for (int i = 0; i < chunkNum; i++) {
rowChunk = offsetToPtr(*((uint32_t *)(mData + chunkPtrOffset)));
chunkPtrOffset = rowChunk - mData + (ROW_SLOT_CHUNK_NUM_ROWS * sizeof(row_slot_t));
} }
return (row_slot_t *)(rowChunk + (chunkPos * sizeof(row_slot_t))); return &chunk->slots[chunkPos];
LOG_WINDOW("exit getRowSlot current row num %d, this row %d", mHeader->numRows, row);
} }
row_slot_t * CursorWindow::allocRowSlot() CursorWindow::RowSlot* CursorWindow::allocRowSlot() {
{ uint32_t chunkPos = mHeader->numRows;
int chunkNum = mHeader->numRows / ROW_SLOT_CHUNK_NUM_ROWS; RowSlotChunk* chunk = static_cast<RowSlotChunk*>(
int chunkPos = mHeader->numRows % ROW_SLOT_CHUNK_NUM_ROWS; offsetToPtr(mHeader->firstChunkOffset));
int chunkPtrOffset = sizeof(window_header_t) + ROW_SLOT_CHUNK_SIZE - sizeof(uint32_t); while (chunkPos > ROW_SLOT_CHUNK_NUM_ROWS) {
uint8_t * rowChunk = mData + sizeof(window_header_t); chunk = static_cast<RowSlotChunk*>(offsetToPtr(chunk->nextChunkOffset));
LOG_WINDOW("Allocating row slot, mHeader->numRows is %d, chunkNum is %d, chunkPos is %d", mHeader->numRows, chunkNum, chunkPos); chunkPos -= ROW_SLOT_CHUNK_NUM_ROWS;
for (int i = 0; i < chunkNum; i++) { }
uint32_t nextChunkOffset = *((uint32_t *)(mData + chunkPtrOffset)); if (chunkPos == ROW_SLOT_CHUNK_NUM_ROWS) {
LOG_WINDOW("nextChunkOffset is %d", nextChunkOffset); if (!chunk->nextChunkOffset) {
if (nextChunkOffset == 0) { chunk->nextChunkOffset = alloc(sizeof(RowSlotChunk), true /*aligned*/);
// Allocate a new row chunk if (!chunk->nextChunkOffset) {
nextChunkOffset = alloc(ROW_SLOT_CHUNK_SIZE, true);
if (nextChunkOffset == 0) {
return NULL; return NULL;
} }
rowChunk = offsetToPtr(nextChunkOffset);
LOG_WINDOW("allocated new chunk at %d, rowChunk = %p", nextChunkOffset, rowChunk);
*((uint32_t *)(mData + chunkPtrOffset)) = rowChunk - mData;
// Mark the new chunk's next 'pointer' as null
*((uint32_t *)(rowChunk + ROW_SLOT_CHUNK_SIZE - sizeof(uint32_t))) = 0;
} else {
LOG_WINDOW("follwing 'pointer' to next chunk, offset of next pointer is %d", chunkPtrOffset);
rowChunk = offsetToPtr(nextChunkOffset);
chunkPtrOffset = rowChunk - mData + (ROW_SLOT_CHUNK_NUM_ROWS * sizeof(row_slot_t));
} }
chunk = static_cast<RowSlotChunk*>(offsetToPtr(chunk->nextChunkOffset));
chunk->nextChunkOffset = 0;
chunkPos = 0;
} }
mHeader->numRows++; mHeader->numRows += 1;
return &chunk->slots[chunkPos];
return (row_slot_t *)(rowChunk + (chunkPos * sizeof(row_slot_t)));
} }
field_slot_t * CursorWindow::getFieldSlotWithCheck(int row, int column) CursorWindow::FieldSlot* CursorWindow::getFieldSlot(uint32_t row, uint32_t column) {
{ if (row >= mHeader->numRows || column >= mHeader->numColumns) {
if (row < 0 || row >= mHeader->numRows || column < 0 || column >= mHeader->numColumns) { LOGE("Failed to read row %d, column %d from a CursorWindow which "
LOGE("Failed to read row# %d, column# from a CursorWindow which has %d rows, %d columns.", "has %d rows, %d columns.",
row, column, mHeader->numRows, mHeader->numColumns); row, column, mHeader->numRows, mHeader->numColumns);
return NULL; return NULL;
} }
row_slot_t * rowSlot = getRowSlot(row); RowSlot* rowSlot = getRowSlot(row);
if (!rowSlot) { if (!rowSlot) {
LOGE("Failed to find rowSlot for row %d", row); LOGE("Failed to find rowSlot for row %d.", row);
return NULL; return NULL;
} }
if (rowSlot->offset == 0 || rowSlot->offset >= mSize) { FieldSlot* fieldDir = static_cast<FieldSlot*>(offsetToPtr(rowSlot->offset));
LOGE("Invalid rowSlot, offset = %d", rowSlot->offset); return &fieldDir[column];
return NULL;
}
int fieldDirOffset = rowSlot->offset;
return ((field_slot_t *)offsetToPtr(fieldDirOffset)) + column;
} }
void CursorWindow::copyIn(uint32_t offset, uint8_t const * data, size_t size) status_t CursorWindow::putBlob(uint32_t row, uint32_t column, const void* value, size_t size) {
{ return putBlobOrString(row, column, value, size, FIELD_TYPE_BLOB);
assert(offset + size <= mSize);
memcpy(mData + offset, data, size);
} }
void CursorWindow::copyIn(uint32_t offset, int64_t data) status_t CursorWindow::putString(uint32_t row, uint32_t column, const char* value,
{ size_t sizeIncludingNull) {
assert(offset + sizeof(int64_t) <= mSize); return putBlobOrString(row, column, value, sizeIncludingNull, FIELD_TYPE_STRING);
memcpy(mData + offset, (uint8_t *)&data, sizeof(int64_t));
} }
void CursorWindow::copyIn(uint32_t offset, double data) status_t CursorWindow::putBlobOrString(uint32_t row, uint32_t column,
{ const void* value, size_t size, int32_t type) {
assert(offset + sizeof(double) <= mSize); if (mReadOnly) {
memcpy(mData + offset, (uint8_t *)&data, sizeof(double)); return INVALID_OPERATION;
} }
void CursorWindow::copyOut(uint32_t offset, uint8_t * data, size_t size) FieldSlot* fieldSlot = getFieldSlot(row, column);
{
assert(offset + size <= mSize);
memcpy(data, mData + offset, size);
}
int64_t CursorWindow::copyOutLong(uint32_t offset)
{
int64_t value;
assert(offset + sizeof(int64_t) <= mSize);
memcpy(&value, mData + offset, sizeof(int64_t));
return value;
}
double CursorWindow::copyOutDouble(uint32_t offset)
{
double value;
assert(offset + sizeof(double) <= mSize);
memcpy(&value, mData + offset, sizeof(double));
return value;
}
bool CursorWindow::putLong(unsigned int row, unsigned int col, int64_t value)
{
field_slot_t * fieldSlot = getFieldSlotWithCheck(row, col);
if (!fieldSlot) { if (!fieldSlot) {
return false; return BAD_VALUE;
} }
#if WINDOW_STORAGE_INLINE_NUMERICS uint32_t offset = alloc(size);
fieldSlot->data.l = value;
#else
int offset = alloc(sizeof(int64_t));
if (!offset) { if (!offset) {
return false; return NO_MEMORY;
} }
copyIn(offset, value); memcpy(offsetToPtr(offset), value, size);
fieldSlot->type = type;
fieldSlot->data.buffer.offset = offset; fieldSlot->data.buffer.offset = offset;
fieldSlot->data.buffer.size = sizeof(int64_t); fieldSlot->data.buffer.size = size;
#endif return OK;
}
status_t CursorWindow::putLong(uint32_t row, uint32_t column, int64_t value) {
if (mReadOnly) {
return INVALID_OPERATION;
}
FieldSlot* fieldSlot = getFieldSlot(row, column);
if (!fieldSlot) {
return BAD_VALUE;
}
fieldSlot->type = FIELD_TYPE_INTEGER; fieldSlot->type = FIELD_TYPE_INTEGER;
return true; fieldSlot->data.l = value;
return OK;
} }
bool CursorWindow::putDouble(unsigned int row, unsigned int col, double value) status_t CursorWindow::putDouble(uint32_t row, uint32_t column, double value) {
{ if (mReadOnly) {
field_slot_t * fieldSlot = getFieldSlotWithCheck(row, col); return INVALID_OPERATION;
}
FieldSlot* fieldSlot = getFieldSlot(row, column);
if (!fieldSlot) { if (!fieldSlot) {
return false; return BAD_VALUE;
} }
#if WINDOW_STORAGE_INLINE_NUMERICS
fieldSlot->data.d = value;
#else
int offset = alloc(sizeof(int64_t));
if (!offset) {
return false;
}
copyIn(offset, value);
fieldSlot->data.buffer.offset = offset;
fieldSlot->data.buffer.size = sizeof(double);
#endif
fieldSlot->type = FIELD_TYPE_FLOAT; fieldSlot->type = FIELD_TYPE_FLOAT;
return true; fieldSlot->data.d = value;
return OK;
} }
bool CursorWindow::putNull(unsigned int row, unsigned int col) status_t CursorWindow::putNull(uint32_t row, uint32_t column) {
{ if (mReadOnly) {
field_slot_t * fieldSlot = getFieldSlotWithCheck(row, col); return INVALID_OPERATION;
}
FieldSlot* fieldSlot = getFieldSlot(row, column);
if (!fieldSlot) { if (!fieldSlot) {
return false; return BAD_VALUE;
} }
fieldSlot->type = FIELD_TYPE_NULL; fieldSlot->type = FIELD_TYPE_NULL;
fieldSlot->data.buffer.offset = 0; fieldSlot->data.buffer.offset = 0;
fieldSlot->data.buffer.size = 0; fieldSlot->data.buffer.size = 0;
return true; return OK;
}
bool CursorWindow::getLong(unsigned int row, unsigned int col, int64_t * valueOut)
{
field_slot_t * fieldSlot = getFieldSlotWithCheck(row, col);
if (!fieldSlot || fieldSlot->type != FIELD_TYPE_INTEGER) {
return false;
}
*valueOut = getFieldSlotValueLong(fieldSlot);
return true;
}
bool CursorWindow::getDouble(unsigned int row, unsigned int col, double * valueOut)
{
field_slot_t * fieldSlot = getFieldSlotWithCheck(row, col);
if (!fieldSlot || fieldSlot->type != FIELD_TYPE_FLOAT) {
return false;
}
*valueOut = getFieldSlotValueDouble(fieldSlot);
return true;
}
bool CursorWindow::getNull(unsigned int row, unsigned int col, bool * valueOut)
{
field_slot_t * fieldSlot = getFieldSlotWithCheck(row, col);
if (!fieldSlot) {
return false;
}
if (fieldSlot->type != FIELD_TYPE_NULL) {
*valueOut = false;
} else {
*valueOut = true;
}
return true;
} }
}; // namespace android }; // namespace android

4
libs/binder/Parcel.cpp
View File

@ -752,7 +752,7 @@ status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob)
int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE); int result = ashmem_set_prot_region(fd, PROT_READ | PROT_WRITE);
if (result < 0) { if (result < 0) {
status = -result; status = result;
} else { } else {
void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); void* ptr = ::mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (ptr == MAP_FAILED) { if (ptr == MAP_FAILED) {
@ -760,7 +760,7 @@ status_t Parcel::writeBlob(size_t len, WritableBlob* outBlob)
} else { } else {
result = ashmem_set_prot_region(fd, PROT_READ); result = ashmem_set_prot_region(fd, PROT_READ);
if (result < 0) { if (result < 0) {
status = -result; status = result;
} else { } else {
status = writeInt32(1); status = writeInt32(1);
if (!status) { if (!status) {