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New WPEBackend-android API introduces sync fence which is used when posting buffers to surface control
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /** | ||
| * Copyright (C) 2023 Igalia S.L. <[email protected]> | ||
| * Author: Jani Hautakangas <[email protected]> | ||
| * | ||
| * This library is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU Lesser General Public | ||
| * License as published by the Free Software Foundation; either | ||
| * version 2.1 of the License, or (at your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public | ||
| * License along with this library; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| */ | ||
|
|
||
| #include "Fence.h" | ||
|
|
||
| #include <algorithm> | ||
| #include <android/sync.h> | ||
| #include <memory> | ||
| #include <poll.h> | ||
|
|
||
| // constexpr uint32_t NO_ERROR = 0; | ||
|
|
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| using sync_file_info_data = struct sync_file_info; | ||
|
|
||
| /* | ||
| * virtual inline Status getStatus() { | ||
| // The sync_wait call underlying wait() has been measured to be | ||
| // significantly faster than the sync_fence_info call underlying | ||
| // getSignalTime(), which might otherwise appear to be the more obvious | ||
| // way to check whether a fence has signaled. | ||
| switch (wait(0)) { | ||
| case NO_ERROR: | ||
| return Status::Signaled; | ||
| case -ETIME: | ||
| return Status::Unsignaled; | ||
| default: | ||
| return Status::Invalid; | ||
| } | ||
| } | ||
| */ | ||
| /* | ||
| namespace { | ||
| int syncWait(int fileDescriptor, int timeout) | ||
| { | ||
| struct pollfd fds = {}; | ||
| int ret = -1; | ||
| if (fileDescriptor < 0) { | ||
| errno = EINVAL; | ||
| return -1; | ||
| } | ||
| fds.fd = fileDescriptor; | ||
| fds.events = POLLIN; | ||
| do { | ||
| ret = poll(&fds, 1, timeout); | ||
| if (ret > 0) { | ||
| if ((static_cast<unsigned int>(fds.revents) & (static_cast<unsigned int>(POLLERR) | static_cast<unsigned | ||
| int>(POLLNVAL))) != 0U) { | ||
| errno = EINVAL; | ||
| return -1; | ||
| } | ||
| return 0; | ||
| } | ||
| if (ret == 0) { | ||
| errno = ETIME; | ||
| return -1; | ||
| } | ||
| } while (ret == -1 && (errno == EINTR || errno == EAGAIN)); | ||
| return ret; | ||
| } | ||
| int32_t wait(int fileDescriptor) | ||
| { | ||
| if (fileDescriptor == -1) { | ||
| return NO_ERROR; | ||
| } | ||
| int const err = syncWait(fileDescriptor, 0); | ||
| return err < 0 ? -errno : static_cast<int32_t>(NO_ERROR); | ||
| } | ||
| } // namespace | ||
| */ | ||
| Fence::FenceStatus Fence::getStatus(int fileDescriptor) | ||
| { | ||
| /* | ||
| switch (wait(fileDescriptor)) { | ||
| case NO_ERROR: | ||
| return FenceStatus::Signaled; | ||
| case -ETIME: | ||
| return FenceStatus::NotSignaled; | ||
| default: | ||
| return FenceStatus::Invalid; | ||
| } | ||
| */ | ||
| auto info = std::unique_ptr<sync_file_info_data, void (*)(sync_file_info_data*)> { | ||
| sync_file_info(fileDescriptor), sync_file_info_free}; | ||
| if (info == nullptr) { | ||
| return FenceStatus::Invalid; | ||
| } | ||
|
|
||
| if (info->status != 1) { | ||
| return FenceStatus::NotSignaled; | ||
| } | ||
|
|
||
| __u64 timestamp = 0U; | ||
| auto* fenceInfo = sync_get_fence_info(info.get()); | ||
| for (size_t i = 0; i < info->num_fences; i++) { | ||
| timestamp = std::max(timestamp, fenceInfo->timestamp_ns); | ||
| } | ||
|
|
||
| return FenceStatus::Signaled; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| /** | ||
| * Copyright (C) 2023 Igalia S.L. <[email protected]> | ||
| * Author: Jani Hautakangas <[email protected]> | ||
| * | ||
| * This library is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU Lesser General Public | ||
| * License as published by the Free Software Foundation; either | ||
| * version 2.1 of the License, or (at your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public | ||
| * License along with this library; if not, write to the Free Software | ||
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| */ | ||
|
|
||
| #pragma once | ||
|
|
||
| class Fence { | ||
| public: | ||
| enum FenceStatus { | ||
| Signaled, | ||
| NotSignaled, | ||
| Invalid | ||
| }; | ||
|
|
||
| static FenceStatus getStatus(int fileDescriptor); | ||
| }; |
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