status_t Fence::flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const {
if (size < getFlattenedSize() || count < getFdCount()) {
return NO_MEMORY;
}
FlattenableUtils::write(buffer, size, (uint32_t)getFdCount());
if (isValid()) {
*fds++ = mFenceFd;
count--;
}
return NO_ERROR;
}
/**
* \brief Return the number of file descriptors contained in
* `HGraphicBufferProducer::FrameEventHistoryDelta`.
*
* \param[in] t The input `HGraphicBufferProducer::FrameEventHistoryDelta`.
* \return The number of file descriptors contained in \p t.
*/
inline size_t getFdCount(
HGraphicBufferProducer::FrameEventHistoryDelta const& t) {
size_t numFds = 0;
for (size_t i = 0; i < t.deltas.size(); ++i) {
numFds += getFdCount(t.deltas[i]);
}
return numFds;
}
/**
* \brief Convert `HGraphicBufferProducer::FrameEventHistoryDelta` to
* `::android::FrameEventHistoryDelta`.
*
* \param[out] l The destination `::android::FrameEventHistoryDelta`.
* \param[in] t The source `HGraphicBufferProducer::FrameEventHistoryDelta`.
*
* This function will duplicate all file descriptors contained in \p t.
*/
inline bool convertTo(
::android::FrameEventHistoryDelta* l,
HGraphicBufferProducer::FrameEventHistoryDelta const& t) {
size_t const baseSize = getFlattenedSize(t);
std::unique_ptr<uint8_t[]> baseBuffer(
new (std::nothrow) uint8_t[baseSize]);
if (!baseBuffer) {
return false;
}
size_t const baseNumFds = getFdCount(t);
std::unique_ptr<int[]> baseFds(
new (std::nothrow) int[baseNumFds]);
if (!baseFds) {
return false;
}
void* buffer = static_cast<void*>(baseBuffer.get());
size_t size = baseSize;
int* fds = static_cast<int*>(baseFds.get());
size_t numFds = baseNumFds;
std::vector<std::vector<native_handle_t*> > nhAA;
if (flatten(t, &nhAA, buffer, size, fds, numFds) != NO_ERROR) {
return false;
}
void const* constBuffer = static_cast<void const*>(baseBuffer.get());
size = baseSize;
int const* constFds = static_cast<int const*>(baseFds.get());
numFds = baseNumFds;
if (l->unflatten(constBuffer, size, constFds, numFds) != NO_ERROR) {
for (auto nhA : nhAA) {
for (auto nh : nhA) {
if (nh != nullptr) {
native_handle_close(nh);
native_handle_delete(nh);
}
}
}
return false;
}
for (auto nhA : nhAA) {
for (auto nh : nhA) {
if (nh != nullptr) {
native_handle_delete(nh);
}
}
}
return true;
}
static jlong nativeCreateFromParcel(JNIEnv* env, jclass clazz, jobject parcelObj) {
Parcel* parcel = parcelForJavaObject(env, parcelObj);
CursorWindow* window;
status_t status = CursorWindow::createFromParcel(parcel, &window);
if (status || !window) {
ALOGE("Could not create CursorWindow from Parcel due to error %d, process fd count=%d",
status, getFdCount());
return 0;
}
LOG_WINDOW("nativeInitializeFromBinder: numRows = %d, numColumns = %d, window = %p",
window->getNumRows(), window->getNumColumns(), window);
return reinterpret_cast<jlong>(window);
}
