tree cc92cff113b3dcfb28db5e1b46a749ea35b86c19
parent 462a3ba917a32e6ad95d49ef8939dd9e8a17a9bc
author Jiawei Shao <jiawei.shao@intel.com> 1622076543 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1622076543 +0000

Implement AsyncWaitableEvent with std::condition_variable

This patch implements the default implementation of WaitableEvent
(AsyncWaitableEvent) with std::condition_variable instead of
std::future as std::future will always block its destructor until
the async function returns, which makes us unable to clean up all
the execution environment of the async task inside the async
function.

This patch also implements WorkerThreadTaskManager to manage all
the async tasks (inherited from WorkerThreadTask) in the future,
for example all the Create*PipelineAsync() tasks.

This patch also updates the related dawn_unittest WorkerThreadTest.
Basic.

BUG=dawn:529
TEST=dawn_unittests

Change-Id: Ie789ba788789e91128ffc416e7e768923828a367
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/51740
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>