void BufferQueueCore::freeAllBuffersLocked() {
for (int s : mFreeSlots) {
clearBufferSlotLocked(s);
}
for (int s : mFreeBuffers) {
mFreeSlots.insert(s);
clearBufferSlotLocked(s);
}
mFreeBuffers.clear();
for (int s : mActiveBuffers) {
mFreeSlots.insert(s);
clearBufferSlotLocked(s);
}
mActiveBuffers.clear();
for (auto& b : mQueue) {
b.mIsStale = true;
// We set this to false to force the BufferQueue to resend the buffer
// handle upon acquire, since if we're here due to a producer
// disconnect, the consumer will have been told to purge its cache of
// slot-to-buffer-handle mappings and will not be able to otherwise
// obtain a valid buffer handle.
b.mAcquireCalled = false;
}
VALIDATE_CONSISTENCY();
}
void BufferQueueCore::discardFreeBuffersLocked() {
for (int s : mFreeBuffers) {
mFreeSlots.insert(s);
clearBufferSlotLocked(s);
}
mFreeBuffers.clear();
VALIDATE_CONSISTENCY();
}
bool BufferQueueCore::adjustAvailableSlotsLocked(int delta) {
if (delta >= 0) {
// If we're going to fail, do so before modifying anything
if (delta > static_cast<int>(mUnusedSlots.size())) {
return false;
}
while (delta > 0) {
if (mUnusedSlots.empty()) {
return false;
}
int slot = mUnusedSlots.back();
mUnusedSlots.pop_back();
mFreeSlots.insert(slot);
delta--;
}
} else {
// If we're going to fail, do so before modifying anything
if (-delta > static_cast<int>(mFreeSlots.size() +
mFreeBuffers.size())) {
return false;
}
while (delta < 0) {
if (!mFreeSlots.empty()) {
auto slot = mFreeSlots.begin();
clearBufferSlotLocked(*slot);
mUnusedSlots.push_back(*slot);
mFreeSlots.erase(slot);
} else if (!mFreeBuffers.empty()) {
int slot = mFreeBuffers.back();
clearBufferSlotLocked(slot);
mUnusedSlots.push_back(slot);
mFreeBuffers.pop_back();
} else {
return false;
}
delta++;
}
}
return true;
}
void BufferQueueCore::freeAllBuffersLocked() {
for (int s : mFreeSlots) {
clearBufferSlotLocked(s);
}
for (int s : mFreeBuffers) {
mFreeSlots.insert(s);
clearBufferSlotLocked(s);
}
mFreeBuffers.clear();
for (int s : mActiveBuffers) {
mFreeSlots.insert(s);
clearBufferSlotLocked(s);
}
mActiveBuffers.clear();
for (auto& b : mQueue) {
b.mIsStale = true;
}
VALIDATE_CONSISTENCY();
}
