Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 1 | #include <sys/epoll.h> |
| 2 | #include <sys/eventfd.h> |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 3 | #include <sys/poll.h> |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 4 | |
| 5 | #include <algorithm> |
| 6 | #include <atomic> |
| 7 | #include <thread> |
| 8 | |
Fan Xu | 74df490 | 2018-09-20 16:40:51 -0700 | [diff] [blame] | 9 | #include <log/log.h> |
Fan Xu | 74df490 | 2018-09-20 16:40:51 -0700 | [diff] [blame] | 10 | #include <private/dvr/buffer_channel.h> |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 11 | #include <private/dvr/bufferhub_rpc.h> |
Fan Xu | 74df490 | 2018-09-20 16:40:51 -0700 | [diff] [blame] | 12 | #include <private/dvr/consumer_channel.h> |
| 13 | #include <private/dvr/producer_channel.h> |
| 14 | #include <sync/sync.h> |
| 15 | #include <utils/Trace.h> |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 16 | |
| 17 | using android::pdx::BorrowedHandle; |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 18 | using android::pdx::ErrorStatus; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 19 | using android::pdx::Message; |
| 20 | using android::pdx::RemoteChannelHandle; |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 21 | using android::pdx::Status; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 22 | using android::pdx::rpc::BufferWrapper; |
| 23 | using android::pdx::rpc::DispatchRemoteMethod; |
| 24 | using android::pdx::rpc::WrapBuffer; |
| 25 | |
| 26 | namespace android { |
| 27 | namespace dvr { |
| 28 | |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 29 | ProducerChannel::ProducerChannel(BufferHubService* service, int buffer_id, |
| 30 | int channel_id, IonBuffer buffer, |
| 31 | IonBuffer metadata_buffer, |
| 32 | size_t user_metadata_size, int* error) |
| 33 | : BufferHubChannel(service, buffer_id, channel_id, kProducerType), |
| 34 | buffer_(std::move(buffer)), |
| 35 | metadata_buffer_(std::move(metadata_buffer)), |
| 36 | user_metadata_size_(user_metadata_size), |
| 37 | metadata_buf_size_(BufferHubDefs::kMetadataHeaderSize + |
| 38 | user_metadata_size) { |
| 39 | if (!buffer_.IsValid()) { |
| 40 | ALOGE("ProducerChannel::ProducerChannel: Invalid buffer."); |
| 41 | *error = -EINVAL; |
| 42 | return; |
| 43 | } |
| 44 | if (!metadata_buffer_.IsValid()) { |
| 45 | ALOGE("ProducerChannel::ProducerChannel: Invalid metadata buffer."); |
| 46 | *error = -EINVAL; |
| 47 | return; |
| 48 | } |
| 49 | |
| 50 | *error = InitializeBuffer(); |
| 51 | } |
| 52 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 53 | ProducerChannel::ProducerChannel(BufferHubService* service, int channel_id, |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 54 | uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 55 | uint32_t layer_count, uint32_t format, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 56 | uint64_t usage, size_t user_metadata_size, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 57 | int* error) |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 58 | : BufferHubChannel(service, channel_id, channel_id, kProducerType), |
| 59 | pending_consumers_(0), |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 60 | producer_owns_(true), |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 61 | user_metadata_size_(user_metadata_size), |
| 62 | metadata_buf_size_(BufferHubDefs::kMetadataHeaderSize + |
| 63 | user_metadata_size) { |
| 64 | if (int ret = buffer_.Alloc(width, height, layer_count, format, usage)) { |
Hendrik Wagenaar | 4d3590f | 2017-05-06 22:36:04 -0700 | [diff] [blame] | 65 | ALOGE("ProducerChannel::ProducerChannel: Failed to allocate buffer: %s", |
| 66 | strerror(-ret)); |
| 67 | *error = ret; |
| 68 | return; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 69 | } |
| 70 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 71 | if (int ret = metadata_buffer_.Alloc(metadata_buf_size_, /*height=*/1, |
| 72 | /*layer_count=*/1, |
| 73 | BufferHubDefs::kMetadataFormat, |
| 74 | BufferHubDefs::kMetadataUsage)) { |
| 75 | ALOGE("ProducerChannel::ProducerChannel: Failed to allocate metadata: %s", |
| 76 | strerror(-ret)); |
| 77 | *error = ret; |
| 78 | return; |
| 79 | } |
| 80 | |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 81 | *error = InitializeBuffer(); |
| 82 | } |
| 83 | |
| 84 | int ProducerChannel::InitializeBuffer() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 85 | void* metadata_ptr = nullptr; |
| 86 | if (int ret = metadata_buffer_.Lock(BufferHubDefs::kMetadataUsage, /*x=*/0, |
| 87 | /*y=*/0, metadata_buf_size_, |
| 88 | /*height=*/1, &metadata_ptr)) { |
| 89 | ALOGE("ProducerChannel::ProducerChannel: Failed to lock metadata."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 90 | return ret; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 91 | } |
| 92 | metadata_header_ = |
| 93 | reinterpret_cast<BufferHubDefs::MetadataHeader*>(metadata_ptr); |
| 94 | |
| 95 | // Using placement new here to reuse shared memory instead of new allocation |
| 96 | // and also initialize the value to zero. |
| 97 | buffer_state_ = |
| 98 | new (&metadata_header_->buffer_state) std::atomic<uint64_t>(0); |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 99 | fence_state_ = new (&metadata_header_->fence_state) std::atomic<uint64_t>(0); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 100 | active_clients_bit_mask_ = |
| 101 | new (&metadata_header_->active_clients_bit_mask) std::atomic<uint64_t>(0); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 102 | |
| 103 | acquire_fence_fd_.Reset(epoll_create1(EPOLL_CLOEXEC)); |
| 104 | release_fence_fd_.Reset(epoll_create1(EPOLL_CLOEXEC)); |
| 105 | if (!acquire_fence_fd_ || !release_fence_fd_) { |
| 106 | ALOGE("ProducerChannel::ProducerChannel: Failed to create shared fences."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 107 | return -EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | dummy_fence_fd_.Reset(eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK)); |
| 111 | if (!dummy_fence_fd_) { |
| 112 | ALOGE("ProducerChannel::ProducerChannel: Failed to create dummy fences."); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 113 | return EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | epoll_event event; |
| 117 | event.events = 0; |
| 118 | event.data.u64 = 0ULL; |
| 119 | if (epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_ADD, dummy_fence_fd_.Get(), |
| 120 | &event) < 0) { |
| 121 | ALOGE( |
| 122 | "ProducerChannel::ProducerChannel: Failed to modify the shared " |
| 123 | "release fence to include the dummy fence: %s", |
| 124 | strerror(errno)); |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 125 | return -EIO; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 126 | } |
| 127 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 128 | // Success. |
Jiwen 'Steve' Cai | 0728fa9 | 2018-04-24 19:03:14 -0700 | [diff] [blame] | 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | std::unique_ptr<ProducerChannel> ProducerChannel::Create( |
| 133 | BufferHubService* service, int buffer_id, int channel_id, IonBuffer buffer, |
| 134 | IonBuffer metadata_buffer, size_t user_metadata_size) { |
| 135 | int error = 0; |
| 136 | std::unique_ptr<ProducerChannel> producer(new ProducerChannel( |
| 137 | service, buffer_id, channel_id, std::move(buffer), |
| 138 | std::move(metadata_buffer), user_metadata_size, &error)); |
| 139 | |
| 140 | if (error < 0) |
| 141 | return nullptr; |
| 142 | else |
| 143 | return producer; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 144 | } |
| 145 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 146 | Status<std::shared_ptr<ProducerChannel>> ProducerChannel::Create( |
| 147 | BufferHubService* service, int channel_id, uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 148 | uint32_t layer_count, uint32_t format, uint64_t usage, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 149 | size_t user_metadata_size) { |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 150 | int error; |
Jiwen 'Steve' Cai | 0057fdd | 2017-05-02 11:21:18 -0700 | [diff] [blame] | 151 | std::shared_ptr<ProducerChannel> producer( |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 152 | new ProducerChannel(service, channel_id, width, height, layer_count, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 153 | format, usage, user_metadata_size, &error)); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 154 | if (error < 0) |
| 155 | return ErrorStatus(-error); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 156 | else |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 157 | return {std::move(producer)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | ProducerChannel::~ProducerChannel() { |
Corey Tabaka | 3079cb7 | 2017-01-19 15:07:26 -0800 | [diff] [blame] | 161 | ALOGD_IF(TRACE, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 162 | "ProducerChannel::~ProducerChannel: channel_id=%d buffer_id=%d " |
| 163 | "state=%" PRIx64 ".", |
| 164 | channel_id(), buffer_id(), buffer_state_->load()); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 165 | for (auto consumer : consumer_channels_) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 166 | consumer->OnProducerClosed(); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 167 | } |
| 168 | Hangup(); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | BufferHubChannel::BufferInfo ProducerChannel::GetBufferInfo() const { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 172 | // Derive the mask of signaled buffers in this producer / consumer set. |
| 173 | uint64_t signaled_mask = signaled() ? BufferHubDefs::kProducerStateBit : 0; |
| 174 | for (const ConsumerChannel* consumer : consumer_channels_) { |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 175 | signaled_mask |= consumer->signaled() ? consumer->client_state_mask() : 0; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 176 | } |
| 177 | |
Hendrik Wagenaar | 4d3590f | 2017-05-06 22:36:04 -0700 | [diff] [blame] | 178 | return BufferInfo(buffer_id(), consumer_channels_.size(), buffer_.width(), |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 179 | buffer_.height(), buffer_.layer_count(), buffer_.format(), |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 180 | buffer_.usage(), pending_consumers_, buffer_state_->load(), |
Jiwen 'Steve' Cai | 2f26033 | 2018-02-15 18:39:47 -0800 | [diff] [blame] | 181 | signaled_mask, metadata_header_->queue_index); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | void ProducerChannel::HandleImpulse(Message& message) { |
| 185 | ATRACE_NAME("ProducerChannel::HandleImpulse"); |
| 186 | switch (message.GetOp()) { |
| 187 | case BufferHubRPC::ProducerGain::Opcode: |
| 188 | OnProducerGain(message); |
| 189 | break; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 190 | case BufferHubRPC::ProducerPost::Opcode: |
| 191 | OnProducerPost(message, {}); |
| 192 | break; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 193 | } |
| 194 | } |
| 195 | |
| 196 | bool ProducerChannel::HandleMessage(Message& message) { |
| 197 | ATRACE_NAME("ProducerChannel::HandleMessage"); |
| 198 | switch (message.GetOp()) { |
| 199 | case BufferHubRPC::GetBuffer::Opcode: |
| 200 | DispatchRemoteMethod<BufferHubRPC::GetBuffer>( |
| 201 | *this, &ProducerChannel::OnGetBuffer, message); |
| 202 | return true; |
| 203 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 204 | case BufferHubRPC::NewConsumer::Opcode: |
| 205 | DispatchRemoteMethod<BufferHubRPC::NewConsumer>( |
| 206 | *this, &ProducerChannel::OnNewConsumer, message); |
| 207 | return true; |
| 208 | |
| 209 | case BufferHubRPC::ProducerPost::Opcode: |
| 210 | DispatchRemoteMethod<BufferHubRPC::ProducerPost>( |
| 211 | *this, &ProducerChannel::OnProducerPost, message); |
| 212 | return true; |
| 213 | |
| 214 | case BufferHubRPC::ProducerGain::Opcode: |
| 215 | DispatchRemoteMethod<BufferHubRPC::ProducerGain>( |
| 216 | *this, &ProducerChannel::OnProducerGain, message); |
| 217 | return true; |
| 218 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 219 | default: |
| 220 | return false; |
| 221 | } |
| 222 | } |
| 223 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 224 | BufferDescription<BorrowedHandle> ProducerChannel::GetBuffer( |
Tianyu Jiang | 7e204b7 | 2018-10-26 15:39:18 -0700 | [diff] [blame] | 225 | uint64_t client_state_mask) { |
Jiwen 'Steve' Cai | 57ae3ee | 2018-05-03 17:51:52 -0700 | [diff] [blame] | 226 | return {buffer_, |
| 227 | metadata_buffer_, |
| 228 | buffer_id(), |
| 229 | channel_id(), |
Tianyu Jiang | 7e204b7 | 2018-10-26 15:39:18 -0700 | [diff] [blame] | 230 | client_state_mask, |
Jiwen 'Steve' Cai | 57ae3ee | 2018-05-03 17:51:52 -0700 | [diff] [blame] | 231 | acquire_fence_fd_.Borrow(), |
| 232 | release_fence_fd_.Borrow()}; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | Status<BufferDescription<BorrowedHandle>> ProducerChannel::OnGetBuffer( |
Corey Tabaka | d53870c | 2017-07-06 18:04:27 -0700 | [diff] [blame] | 236 | Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 237 | ATRACE_NAME("ProducerChannel::OnGetBuffer"); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 238 | ALOGD_IF(TRACE, "ProducerChannel::OnGetBuffer: buffer=%d, state=%" PRIx64 ".", |
| 239 | buffer_id(), buffer_state_->load()); |
| 240 | return {GetBuffer(BufferHubDefs::kProducerStateBit)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 241 | } |
| 242 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 243 | Status<RemoteChannelHandle> ProducerChannel::CreateConsumer(Message& message) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 244 | ATRACE_NAME("ProducerChannel::CreateConsumer"); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 245 | ALOGD_IF(TRACE, |
| 246 | "ProducerChannel::CreateConsumer: buffer_id=%d, producer_owns=%d", |
| 247 | buffer_id(), producer_owns_); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 248 | |
| 249 | int channel_id; |
| 250 | auto status = message.PushChannel(0, nullptr, &channel_id); |
| 251 | if (!status) { |
| 252 | ALOGE( |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 253 | "ProducerChannel::CreateConsumer: Failed to push consumer channel: %s", |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 254 | status.GetErrorMessage().c_str()); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 255 | return ErrorStatus(ENOMEM); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 256 | } |
| 257 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 258 | // Try find the next consumer state bit which has not been claimed by any |
| 259 | // consumer yet. |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 260 | // memory_order_acquire is chosen here because all writes in other threads |
| 261 | // that release active_clients_bit_mask_ need to be visible here. |
| 262 | uint64_t current_active_clients_bit_mask = |
| 263 | active_clients_bit_mask_->load(std::memory_order_acquire); |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 264 | uint64_t client_state_mask = BufferHubDefs::FindNextAvailableClientStateMask( |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 265 | current_active_clients_bit_mask | orphaned_consumer_bit_mask_ | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 266 | BufferHubDefs::kProducerStateBit); |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 267 | if (client_state_mask == 0ULL) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 268 | ALOGE( |
| 269 | "ProducerChannel::CreateConsumer: reached the maximum mumber of " |
| 270 | "consumers per producer: 63."); |
| 271 | return ErrorStatus(E2BIG); |
| 272 | } |
| 273 | |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 274 | uint64_t updated_active_clients_bit_mask = |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 275 | current_active_clients_bit_mask | client_state_mask; |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 276 | // Set the updated value only if the current value stays the same as what was |
| 277 | // read before. If the comparison succeeds, update the value without |
| 278 | // reordering anything before or after this read-modify-write in the current |
| 279 | // thread, and the modification will be visible in other threads that acquire |
| 280 | // active_clients_bit_mask_. If the comparison fails, load the result of |
| 281 | // all writes from all threads to updated_active_clients_bit_mask. |
| 282 | if (!active_clients_bit_mask_->compare_exchange_weak( |
| 283 | current_active_clients_bit_mask, updated_active_clients_bit_mask, |
| 284 | std::memory_order_acq_rel, std::memory_order_acquire)) { |
| 285 | ALOGE("Current active clients bit mask is changed to %" PRIu64 |
| 286 | ", which was expected to be %" PRIu64 ".", |
| 287 | updated_active_clients_bit_mask, current_active_clients_bit_mask); |
| 288 | return ErrorStatus(EBUSY); |
| 289 | } |
| 290 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 291 | auto consumer = |
| 292 | std::make_shared<ConsumerChannel>(service(), buffer_id(), channel_id, |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 293 | client_state_mask, shared_from_this()); |
Alex Vakulenko | f0a7bd0 | 2017-03-31 18:06:19 -0700 | [diff] [blame] | 294 | const auto channel_status = service()->SetChannel(channel_id, consumer); |
| 295 | if (!channel_status) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 296 | ALOGE( |
| 297 | "ProducerChannel::CreateConsumer: failed to set new consumer channel: " |
| 298 | "%s", |
Alex Vakulenko | f0a7bd0 | 2017-03-31 18:06:19 -0700 | [diff] [blame] | 299 | channel_status.GetErrorMessage().c_str()); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 300 | // Restore the consumer state bit and make it visible in other threads that |
| 301 | // acquire the active_clients_bit_mask_. |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 302 | active_clients_bit_mask_->fetch_and(~client_state_mask, |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 303 | std::memory_order_release); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 304 | return ErrorStatus(ENOMEM); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 305 | } |
| 306 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 307 | if (!producer_owns_ && |
| 308 | !BufferHubDefs::IsBufferReleased(buffer_state_->load())) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 309 | // Signal the new consumer when adding it to a posted producer. |
| 310 | if (consumer->OnProducerPosted()) |
| 311 | pending_consumers_++; |
| 312 | } |
| 313 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 314 | return {status.take()}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 315 | } |
| 316 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 317 | Status<RemoteChannelHandle> ProducerChannel::OnNewConsumer(Message& message) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 318 | ATRACE_NAME("ProducerChannel::OnNewConsumer"); |
| 319 | ALOGD_IF(TRACE, "ProducerChannel::OnNewConsumer: buffer_id=%d", buffer_id()); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 320 | return CreateConsumer(message); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 321 | } |
| 322 | |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 323 | Status<void> ProducerChannel::OnProducerPost(Message&, |
| 324 | LocalFence acquire_fence) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 325 | ATRACE_NAME("ProducerChannel::OnProducerPost"); |
| 326 | ALOGD_IF(TRACE, "ProducerChannel::OnProducerPost: buffer_id=%d", buffer_id()); |
| 327 | if (!producer_owns_) { |
| 328 | ALOGE("ProducerChannel::OnProducerPost: Not in gained state!"); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 329 | return ErrorStatus(EBUSY); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 330 | } |
| 331 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 332 | epoll_event event; |
| 333 | event.events = 0; |
| 334 | event.data.u64 = 0ULL; |
| 335 | int ret = epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_MOD, |
| 336 | dummy_fence_fd_.Get(), &event); |
| 337 | ALOGE_IF(ret < 0, |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 338 | "ProducerChannel::OnProducerPost: Failed to modify the shared " |
| 339 | "release fence to include the dummy fence: %s", |
| 340 | strerror(errno)); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 341 | |
| 342 | eventfd_t dummy_fence_count = 0ULL; |
| 343 | if (eventfd_read(dummy_fence_fd_.Get(), &dummy_fence_count) < 0) { |
| 344 | const int error = errno; |
| 345 | if (error != EAGAIN) { |
| 346 | ALOGE( |
| 347 | "ProducerChannel::ProducerChannel: Failed to read dummy fence, " |
| 348 | "error: %s", |
| 349 | strerror(error)); |
| 350 | return ErrorStatus(error); |
| 351 | } |
Corey Tabaka | 8a4e6a9 | 2017-04-20 13:42:02 -0700 | [diff] [blame] | 352 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 353 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 354 | ALOGW_IF(dummy_fence_count > 0, |
| 355 | "ProducerChannel::ProducerChannel: %" PRIu64 |
| 356 | " dummy fence(s) was signaled during last release/gain cycle " |
| 357 | "buffer_id=%d.", |
| 358 | dummy_fence_count, buffer_id()); |
| 359 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 360 | post_fence_ = std::move(acquire_fence); |
| 361 | producer_owns_ = false; |
| 362 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 363 | // Signal any interested consumers. If there are none, the buffer will stay |
| 364 | // in posted state until a consumer comes online. This behavior guarantees |
| 365 | // that no frame is silently dropped. |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 366 | pending_consumers_ = 0; |
| 367 | for (auto consumer : consumer_channels_) { |
| 368 | if (consumer->OnProducerPosted()) |
| 369 | pending_consumers_++; |
| 370 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 371 | ALOGD_IF(TRACE, "ProducerChannel::OnProducerPost: %d pending consumers", |
| 372 | pending_consumers_); |
| 373 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 374 | return {}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 375 | } |
| 376 | |
Corey Tabaka | d53870c | 2017-07-06 18:04:27 -0700 | [diff] [blame] | 377 | Status<LocalFence> ProducerChannel::OnProducerGain(Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 378 | ATRACE_NAME("ProducerChannel::OnGain"); |
| 379 | ALOGD_IF(TRACE, "ProducerChannel::OnGain: buffer_id=%d", buffer_id()); |
| 380 | if (producer_owns_) { |
| 381 | ALOGE("ProducerChanneL::OnGain: Already in gained state: channel=%d", |
| 382 | channel_id()); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 383 | return ErrorStatus(EALREADY); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | // There are still pending consumers, return busy. |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 387 | if (pending_consumers_ > 0) { |
| 388 | ALOGE( |
| 389 | "ProducerChannel::OnGain: Producer (id=%d) is gaining a buffer that " |
| 390 | "still has %d pending consumer(s).", |
| 391 | buffer_id(), pending_consumers_); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 392 | return ErrorStatus(EBUSY); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 393 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 394 | |
| 395 | ClearAvailable(); |
| 396 | producer_owns_ = true; |
Alex Vakulenko | 052f3ae | 2017-03-31 09:10:43 -0700 | [diff] [blame] | 397 | post_fence_.close(); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 398 | return {std::move(returned_fence_)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 399 | } |
| 400 | |
Fan Xu | b0eec51 | 2018-10-30 11:33:15 -0700 | [diff] [blame] | 401 | // TODO(b/112338294) Keep here for reference. Remove it after new logic is |
| 402 | // written. |
| 403 | /* Status<RemoteChannelHandle> ProducerChannel::OnProducerDetach( |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 404 | Message& message) { |
| 405 | ATRACE_NAME("ProducerChannel::OnProducerDetach"); |
| 406 | ALOGD_IF(TRACE, "ProducerChannel::OnProducerDetach: buffer_id=%d", |
| 407 | buffer_id()); |
| 408 | |
| 409 | uint64_t buffer_state = buffer_state_->load(); |
| 410 | if (!BufferHubDefs::IsBufferGained(buffer_state)) { |
| 411 | // Can only detach a BufferProducer when it's in gained state. |
| 412 | ALOGW( |
| 413 | "ProducerChannel::OnProducerDetach: The buffer (id=%d, state=0x%" PRIx64 |
| 414 | ") is not in gained state.", |
| 415 | buffer_id(), buffer_state); |
| 416 | return {}; |
| 417 | } |
| 418 | |
| 419 | int channel_id; |
| 420 | auto status = message.PushChannel(0, nullptr, &channel_id); |
| 421 | if (!status) { |
| 422 | ALOGE( |
| 423 | "ProducerChannel::OnProducerDetach: Failed to push detached buffer " |
| 424 | "channel: %s", |
| 425 | status.GetErrorMessage().c_str()); |
| 426 | return ErrorStatus(ENOMEM); |
| 427 | } |
| 428 | |
| 429 | // Make sure we unlock the buffer. |
| 430 | if (int ret = metadata_buffer_.Unlock()) { |
| 431 | ALOGE("ProducerChannel::OnProducerDetach: Failed to unlock metadata."); |
| 432 | return ErrorStatus(-ret); |
| 433 | }; |
| 434 | |
Jiwen 'Steve' Cai | 9004b8c | 2018-10-03 18:52:23 -0700 | [diff] [blame] | 435 | std::unique_ptr<BufferChannel> channel = |
| 436 | BufferChannel::Create(service(), buffer_id(), channel_id, |
| 437 | std::move(buffer_), user_metadata_size_); |
Jiwen 'Steve' Cai | a8049a2 | 2018-03-28 15:14:02 -0700 | [diff] [blame] | 438 | if (!channel) { |
| 439 | ALOGE("ProducerChannel::OnProducerDetach: Invalid buffer."); |
| 440 | return ErrorStatus(EINVAL); |
| 441 | } |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 442 | |
Jiwen 'Steve' Cai | a8049a2 | 2018-03-28 15:14:02 -0700 | [diff] [blame] | 443 | const auto channel_status = |
| 444 | service()->SetChannel(channel_id, std::move(channel)); |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 445 | if (!channel_status) { |
| 446 | // Technically, this should never fail, as we just pushed the channel. Note |
| 447 | // that LOG_FATAL will be stripped out in non-debug build. |
| 448 | LOG_FATAL( |
| 449 | "ProducerChannel::OnProducerDetach: Failed to set new detached buffer " |
| 450 | "channel: %s.", |
| 451 | channel_status.GetErrorMessage().c_str()); |
| 452 | } |
| 453 | |
| 454 | return status; |
Fan Xu | b0eec51 | 2018-10-30 11:33:15 -0700 | [diff] [blame] | 455 | } */ |
Jiwen 'Steve' Cai | 23c1a73 | 2018-03-12 12:16:47 -0700 | [diff] [blame] | 456 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 457 | Status<LocalFence> ProducerChannel::OnConsumerAcquire(Message& /*message*/) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 458 | ATRACE_NAME("ProducerChannel::OnConsumerAcquire"); |
| 459 | ALOGD_IF(TRACE, "ProducerChannel::OnConsumerAcquire: buffer_id=%d", |
| 460 | buffer_id()); |
| 461 | if (producer_owns_) { |
| 462 | ALOGE("ProducerChannel::OnConsumerAcquire: Not in posted state!"); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 463 | return ErrorStatus(EBUSY); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | // Return a borrowed fd to avoid unnecessary duplication of the underlying fd. |
| 467 | // Serialization just needs to read the handle. |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 468 | return {std::move(post_fence_)}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 469 | } |
| 470 | |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 471 | Status<void> ProducerChannel::OnConsumerRelease(Message&, |
| 472 | LocalFence release_fence) { |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 473 | ATRACE_NAME("ProducerChannel::OnConsumerRelease"); |
| 474 | ALOGD_IF(TRACE, "ProducerChannel::OnConsumerRelease: buffer_id=%d", |
| 475 | buffer_id()); |
| 476 | if (producer_owns_) { |
| 477 | ALOGE("ProducerChannel::OnConsumerRelease: Not in acquired state!"); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 478 | return ErrorStatus(EBUSY); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 479 | } |
| 480 | |
| 481 | // Attempt to merge the fences if necessary. |
| 482 | if (release_fence) { |
| 483 | if (returned_fence_) { |
Corey Tabaka | 3079cb7 | 2017-01-19 15:07:26 -0800 | [diff] [blame] | 484 | LocalFence merged_fence(sync_merge("bufferhub_merged", |
| 485 | returned_fence_.get_fd(), |
| 486 | release_fence.get_fd())); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 487 | const int error = errno; |
| 488 | if (!merged_fence) { |
| 489 | ALOGE("ProducerChannel::OnConsumerRelease: Failed to merge fences: %s", |
| 490 | strerror(error)); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 491 | return ErrorStatus(error); |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 492 | } |
| 493 | returned_fence_ = std::move(merged_fence); |
| 494 | } else { |
| 495 | returned_fence_ = std::move(release_fence); |
| 496 | } |
| 497 | } |
| 498 | |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 499 | DecrementPendingConsumers(); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 500 | if (pending_consumers_ == 0) { |
| 501 | // Clear the producer bit atomically to transit into released state. This |
| 502 | // has to done by BufferHub as it requries synchronization among all |
| 503 | // consumers. |
| 504 | BufferHubDefs::ModifyBufferState(buffer_state_, |
| 505 | BufferHubDefs::kProducerStateBit, 0ULL); |
| 506 | ALOGD_IF(TRACE, |
| 507 | "ProducerChannel::OnConsumerRelease: releasing last consumer: " |
| 508 | "buffer_id=%d state=%" PRIx64 ".", |
| 509 | buffer_id(), buffer_state_->load()); |
| 510 | |
| 511 | if (orphaned_consumer_bit_mask_) { |
| 512 | ALOGW( |
| 513 | "ProducerChannel::OnConsumerRelease: orphaned buffer detected " |
| 514 | "during the this acquire/release cycle: id=%d orphaned=0x%" PRIx64 |
| 515 | " queue_index=%" PRIu64 ".", |
| 516 | buffer_id(), orphaned_consumer_bit_mask_, |
| 517 | metadata_header_->queue_index); |
| 518 | orphaned_consumer_bit_mask_ = 0; |
| 519 | } |
| 520 | |
| 521 | SignalAvailable(); |
| 522 | } |
| 523 | |
| 524 | ALOGE_IF(pending_consumers_ && |
| 525 | BufferHubDefs::IsBufferReleased(buffer_state_->load()), |
| 526 | "ProducerChannel::OnConsumerRelease: buffer state inconsistent: " |
| 527 | "pending_consumers=%d, buffer buffer is in releaed state.", |
| 528 | pending_consumers_); |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 529 | return {}; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 530 | } |
| 531 | |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 532 | void ProducerChannel::DecrementPendingConsumers() { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 533 | if (pending_consumers_ == 0) { |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 534 | ALOGE("ProducerChannel::DecrementPendingConsumers: no pending consumer."); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 535 | return; |
| 536 | } |
| 537 | |
| 538 | --pending_consumers_; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 539 | ALOGD_IF(TRACE, |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 540 | "ProducerChannel::DecrementPendingConsumers: buffer_id=%d %d " |
| 541 | "consumers left", |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 542 | buffer_id(), pending_consumers_); |
| 543 | } |
| 544 | |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 545 | void ProducerChannel::OnConsumerOrphaned(ConsumerChannel* channel) { |
| 546 | // Ignore the orphaned consumer. |
Tianyu | 0c6b7ff | 2018-10-03 11:30:04 -0700 | [diff] [blame] | 547 | DecrementPendingConsumers(); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 548 | |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 549 | const uint64_t client_state_mask = channel->client_state_mask(); |
| 550 | ALOGE_IF(orphaned_consumer_bit_mask_ & client_state_mask, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 551 | "ProducerChannel::OnConsumerOrphaned: Consumer " |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 552 | "(client_state_mask=%" PRIx64 ") is already orphaned.", |
| 553 | client_state_mask); |
| 554 | orphaned_consumer_bit_mask_ |= client_state_mask; |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 555 | |
| 556 | // Atomically clear the fence state bit as an orphaned consumer will never |
| 557 | // signal a release fence. Also clear the buffer state as it won't be released |
| 558 | // as well. |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 559 | fence_state_->fetch_and(~client_state_mask); |
| 560 | BufferHubDefs::ModifyBufferState(buffer_state_, client_state_mask, 0ULL); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 561 | |
| 562 | ALOGW( |
| 563 | "ProducerChannel::OnConsumerOrphaned: detected new orphaned consumer " |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 564 | "buffer_id=%d client_state_mask=%" PRIx64 " queue_index=%" PRIu64 |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 565 | " buffer_state=%" PRIx64 " fence_state=%" PRIx64 ".", |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 566 | buffer_id(), client_state_mask, metadata_header_->queue_index, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 567 | buffer_state_->load(), fence_state_->load()); |
| 568 | } |
| 569 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 570 | void ProducerChannel::AddConsumer(ConsumerChannel* channel) { |
| 571 | consumer_channels_.push_back(channel); |
| 572 | } |
| 573 | |
| 574 | void ProducerChannel::RemoveConsumer(ConsumerChannel* channel) { |
| 575 | consumer_channels_.erase( |
| 576 | std::find(consumer_channels_.begin(), consumer_channels_.end(), channel)); |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 577 | // Restore the consumer state bit and make it visible in other threads that |
| 578 | // acquire the active_clients_bit_mask_. |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 579 | active_clients_bit_mask_->fetch_and(~channel->client_state_mask(), |
Tianyu | 6705349 | 2018-10-04 14:00:22 -0700 | [diff] [blame] | 580 | std::memory_order_release); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 581 | |
| 582 | const uint64_t buffer_state = buffer_state_->load(); |
| 583 | if (BufferHubDefs::IsBufferPosted(buffer_state) || |
| 584 | BufferHubDefs::IsBufferAcquired(buffer_state)) { |
| 585 | // The consumer client is being destoryed without releasing. This could |
| 586 | // happen in corner cases when the consumer crashes. Here we mark it |
| 587 | // orphaned before remove it from producer. |
| 588 | OnConsumerOrphaned(channel); |
| 589 | } |
| 590 | |
| 591 | if (BufferHubDefs::IsBufferReleased(buffer_state) || |
| 592 | BufferHubDefs::IsBufferGained(buffer_state)) { |
| 593 | // The consumer is being close while it is suppose to signal a release |
| 594 | // fence. Signal the dummy fence here. |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 595 | if (fence_state_->load() & channel->client_state_mask()) { |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 596 | epoll_event event; |
| 597 | event.events = EPOLLIN; |
Tianyu Jiang | 83a991f | 2018-10-30 16:59:29 -0700 | [diff] [blame^] | 598 | event.data.u64 = channel->client_state_mask(); |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 599 | if (epoll_ctl(release_fence_fd_.Get(), EPOLL_CTL_MOD, |
| 600 | dummy_fence_fd_.Get(), &event) < 0) { |
| 601 | ALOGE( |
| 602 | "ProducerChannel::RemoveConsumer: Failed to modify the shared " |
| 603 | "release fence to include the dummy fence: %s", |
| 604 | strerror(errno)); |
| 605 | return; |
| 606 | } |
| 607 | ALOGW( |
| 608 | "ProducerChannel::RemoveConsumer: signal dummy release fence " |
| 609 | "buffer_id=%d", |
| 610 | buffer_id()); |
| 611 | eventfd_write(dummy_fence_fd_.Get(), 1); |
| 612 | } |
| 613 | } |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 614 | } |
| 615 | |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 616 | // Returns true if the given parameters match the underlying buffer parameters. |
Corey Tabaka | cd52dd9 | 2017-04-07 18:03:57 -0700 | [diff] [blame] | 617 | bool ProducerChannel::CheckParameters(uint32_t width, uint32_t height, |
Hendrik Wagenaar | 108e84f | 2017-05-07 22:19:17 -0700 | [diff] [blame] | 618 | uint32_t layer_count, uint32_t format, |
Corey Tabaka | 52ea25c | 2017-09-13 18:02:48 -0700 | [diff] [blame] | 619 | uint64_t usage, |
| 620 | size_t user_metadata_size) { |
| 621 | return user_metadata_size == user_metadata_size_ && |
| 622 | buffer_.width() == width && buffer_.height() == height && |
| 623 | buffer_.layer_count() == layer_count && buffer_.format() == format && |
| 624 | buffer_.usage() == usage; |
Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame] | 625 | } |
| 626 | |
| 627 | } // namespace dvr |
| 628 | } // namespace android |