cc0bf53f21
Bug: 5332296 The code is functionally equivalent, but a little more efficient and much easier to maintain. Change-Id: I90670a13799df05831843a5137ab234929281b7c
378 lines
12 KiB
C++
378 lines
12 KiB
C++
/*
|
|
* Copyright (C) 2006-2007 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#undef LOG_TAG
|
|
#define LOG_TAG "CursorWindow"
|
|
|
|
#include <utils/Log.h>
|
|
#include <binder/CursorWindow.h>
|
|
#include <binder/MemoryHeapBase.h>
|
|
#include <binder/MemoryBase.h>
|
|
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
namespace android {
|
|
|
|
CursorWindow::CursorWindow(size_t maxSize) :
|
|
mMaxSize(maxSize)
|
|
{
|
|
}
|
|
|
|
bool CursorWindow::setMemory(const sp<IMemory>& memory)
|
|
{
|
|
mMemory = memory;
|
|
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)
|
|
{
|
|
//TODO Use a non-memory dealer mmap region for localOnly
|
|
|
|
sp<MemoryHeapBase> heap;
|
|
heap = new MemoryHeapBase(mMaxSize, 0, "CursorWindow");
|
|
if (heap != NULL) {
|
|
mMemory = new MemoryBase(heap, 0, mMaxSize);
|
|
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 {
|
|
LOGE("failed to create the CursorWindow heap");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
CursorWindow::~CursorWindow()
|
|
{
|
|
// Everything that matters is a smart pointer
|
|
}
|
|
|
|
void CursorWindow::clear()
|
|
{
|
|
mHeader->numRows = 0;
|
|
mHeader->numColumns = 0;
|
|
mFreeOffset = sizeof(window_header_t) + ROW_SLOT_CHUNK_SIZE;
|
|
// Mark the first chunk's next 'pointer' as null
|
|
*((uint32_t *)(mData + mFreeOffset - sizeof(uint32_t))) = 0;
|
|
}
|
|
|
|
int32_t CursorWindow::freeSpace()
|
|
{
|
|
int32_t freeSpace = mSize - mFreeOffset;
|
|
if (freeSpace < 0) {
|
|
freeSpace = 0;
|
|
}
|
|
return freeSpace;
|
|
}
|
|
|
|
field_slot_t * CursorWindow::allocRow()
|
|
{
|
|
// Fill in the row slot
|
|
row_slot_t * rowSlot = allocRowSlot();
|
|
if (rowSlot == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
// Allocate the slots for the field directory
|
|
size_t fieldDirSize = mHeader->numColumns * sizeof(field_slot_t);
|
|
uint32_t fieldDirOffset = alloc(fieldDirSize);
|
|
if (!fieldDirOffset) {
|
|
mHeader->numRows--;
|
|
LOG_WINDOW("The row failed, so back out the new row accounting from allocRowSlot %d", mHeader->numRows);
|
|
return NULL;
|
|
}
|
|
field_slot_t * fieldDir = (field_slot_t *)offsetToPtr(fieldDirOffset);
|
|
memset(fieldDir, 0x0, 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);
|
|
rowSlot->offset = fieldDirOffset;
|
|
|
|
return fieldDir;
|
|
}
|
|
|
|
uint32_t CursorWindow::alloc(size_t requestedSize, bool aligned)
|
|
{
|
|
int32_t size;
|
|
uint32_t padding;
|
|
if (aligned) {
|
|
// 4 byte alignment
|
|
padding = 4 - (mFreeOffset & 0x3);
|
|
} else {
|
|
padding = 0;
|
|
}
|
|
|
|
size = requestedSize + padding;
|
|
|
|
if (size > freeSpace()) {
|
|
LOGV("need to grow: mSize = %d, size = %d, freeSpace() = %d, numRows = %d", mSize, size,
|
|
freeSpace(), mHeader->numRows);
|
|
// Only grow the window if the first row doesn't fit
|
|
if (mHeader->numRows > 1) {
|
|
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;
|
|
mFreeOffset += size;
|
|
return offset;
|
|
}
|
|
|
|
row_slot_t * CursorWindow::getRowSlot(int row)
|
|
{
|
|
LOG_WINDOW("enter getRowSlot current row num %d, this row %d", mHeader->numRows, row);
|
|
int chunkNum = row / ROW_SLOT_CHUNK_NUM_ROWS;
|
|
int chunkPos = row % ROW_SLOT_CHUNK_NUM_ROWS;
|
|
int chunkPtrOffset = sizeof(window_header_t) + ROW_SLOT_CHUNK_SIZE - sizeof(uint32_t);
|
|
uint8_t * rowChunk = mData + sizeof(window_header_t);
|
|
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)));
|
|
LOG_WINDOW("exit getRowSlot current row num %d, this row %d", mHeader->numRows, row);
|
|
}
|
|
|
|
row_slot_t * CursorWindow::allocRowSlot()
|
|
{
|
|
int chunkNum = mHeader->numRows / ROW_SLOT_CHUNK_NUM_ROWS;
|
|
int chunkPos = mHeader->numRows % ROW_SLOT_CHUNK_NUM_ROWS;
|
|
int chunkPtrOffset = sizeof(window_header_t) + ROW_SLOT_CHUNK_SIZE - sizeof(uint32_t);
|
|
uint8_t * rowChunk = mData + sizeof(window_header_t);
|
|
LOG_WINDOW("Allocating row slot, mHeader->numRows is %d, chunkNum is %d, chunkPos is %d", mHeader->numRows, chunkNum, chunkPos);
|
|
for (int i = 0; i < chunkNum; i++) {
|
|
uint32_t nextChunkOffset = *((uint32_t *)(mData + chunkPtrOffset));
|
|
LOG_WINDOW("nextChunkOffset is %d", nextChunkOffset);
|
|
if (nextChunkOffset == 0) {
|
|
// Allocate a new row chunk
|
|
nextChunkOffset = alloc(ROW_SLOT_CHUNK_SIZE, true);
|
|
if (nextChunkOffset == 0) {
|
|
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));
|
|
}
|
|
}
|
|
mHeader->numRows++;
|
|
|
|
return (row_slot_t *)(rowChunk + (chunkPos * sizeof(row_slot_t)));
|
|
}
|
|
|
|
field_slot_t * CursorWindow::getFieldSlotWithCheck(int row, int column)
|
|
{
|
|
if (row < 0 || row >= mHeader->numRows || column < 0 || column >= mHeader->numColumns) {
|
|
LOGE("Failed to read row# %d, column# from a CursorWindow which has %d rows, %d columns.",
|
|
row, column, mHeader->numRows, mHeader->numColumns);
|
|
return NULL;
|
|
}
|
|
row_slot_t * rowSlot = getRowSlot(row);
|
|
if (!rowSlot) {
|
|
LOGE("Failed to find rowSlot for row %d", row);
|
|
return NULL;
|
|
}
|
|
if (rowSlot->offset == 0 || rowSlot->offset >= mSize) {
|
|
LOGE("Invalid rowSlot, offset = %d", rowSlot->offset);
|
|
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)
|
|
{
|
|
assert(offset + size <= mSize);
|
|
memcpy(mData + offset, data, size);
|
|
}
|
|
|
|
void CursorWindow::copyIn(uint32_t offset, int64_t data)
|
|
{
|
|
assert(offset + sizeof(int64_t) <= mSize);
|
|
memcpy(mData + offset, (uint8_t *)&data, sizeof(int64_t));
|
|
}
|
|
|
|
void CursorWindow::copyIn(uint32_t offset, double data)
|
|
{
|
|
assert(offset + sizeof(double) <= mSize);
|
|
memcpy(mData + offset, (uint8_t *)&data, sizeof(double));
|
|
}
|
|
|
|
void CursorWindow::copyOut(uint32_t offset, uint8_t * data, size_t size)
|
|
{
|
|
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) {
|
|
return false;
|
|
}
|
|
|
|
#if WINDOW_STORAGE_INLINE_NUMERICS
|
|
fieldSlot->data.l = 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(int64_t);
|
|
#endif
|
|
fieldSlot->type = FIELD_TYPE_INTEGER;
|
|
return true;
|
|
}
|
|
|
|
bool CursorWindow::putDouble(unsigned int row, unsigned int col, double value)
|
|
{
|
|
field_slot_t * fieldSlot = getFieldSlotWithCheck(row, col);
|
|
if (!fieldSlot) {
|
|
return false;
|
|
}
|
|
|
|
#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;
|
|
return true;
|
|
}
|
|
|
|
bool CursorWindow::putNull(unsigned int row, unsigned int col)
|
|
{
|
|
field_slot_t * fieldSlot = getFieldSlotWithCheck(row, col);
|
|
if (!fieldSlot) {
|
|
return false;
|
|
}
|
|
|
|
fieldSlot->type = FIELD_TYPE_NULL;
|
|
fieldSlot->data.buffer.offset = 0;
|
|
fieldSlot->data.buffer.size = 0;
|
|
return true;
|
|
}
|
|
|
|
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
|