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Revert "Refactor the PlatformThread API."

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This reverts commit c89fdd716c4c8af608017c76f75bf27e4c3d602e.

Reason for revert: Causes rare compilation error on win-libfuzzer-asan trybot.
See https://ci.chromium.org/p/chromium/builders/try/win-libfuzzer-asan-rel/713745?

Original change's description:
> Refactor the PlatformThread API.
>
> PlatformThread's API is using old style function pointers, causes
> casting, is unintuitive and forces artificial call sequences, and
> is additionally possible to misuse in release mode.
>
> Fix this by an API face lift:
> 1. The class is turned into a handle, which can be empty.
> 2. The only way of getting a non-empty PlatformThread is by calling
> SpawnJoinable or SpawnDetached, clearly conveying the semantics to the
> code reader.
> 3. Handles can be Finalized, which works differently for joinable and
> detached threads:
>   a) Handles for detached threads are simply closed where applicable.
>   b) Joinable threads are joined before handles are closed.
> 4. The destructor finalizes handles. No explicit call is needed.
>
> Fixed: webrtc:12727
> Change-Id: Id00a0464edf4fc9e552b6a1fbb5d2e1280e88811
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/215075
> Commit-Queue: Markus Handell <handellm@webrtc.org>
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
> Reviewed-by: Tommi <tommi@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#33923}

# Not skipping CQ checks because original CL landed > 1 day ago.

TBR=handellm@webrtc.org

Bug: webrtc:12727
Change-Id: Ic0146be8866f6dd3ad9c364fb8646650b8e07419
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/217583
Reviewed-by: Guido Urdaneta <guidou@webrtc.org>
Reviewed-by: Markus Handell <handellm@webrtc.org>
Commit-Queue: Guido Urdaneta <guidou@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33936}
This commit is contained in:
Guido Urdaneta
2021-05-06 13:12:47 +00:00
committed by WebRTC LUCI CQ
parent a6983c6ea2
commit 793bac569f
38 changed files with 863 additions and 585 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
modules/utility/source/process_thread_impl.cc
View File

@ -48,6 +48,7 @@ ProcessThreadImpl::ProcessThreadImpl(const char* thread_name)
ProcessThreadImpl::~ProcessThreadImpl() {
RTC_DCHECK(thread_checker_.IsCurrent());
RTC_DCHECK(!thread_.get());
RTC_DCHECK(!stop_);
while (!delayed_tasks_.empty()) {
@ -71,8 +72,8 @@ void ProcessThreadImpl::Delete() {
// Doesn't need locking, because the contending thread isn't running.
void ProcessThreadImpl::Start() RTC_NO_THREAD_SAFETY_ANALYSIS {
RTC_DCHECK(thread_checker_.IsCurrent());
RTC_DCHECK(thread_.empty());
if (!thread_.empty())
RTC_DCHECK(!thread_.get());
if (thread_.get())
return;
RTC_DCHECK(!stop_);
@ -80,18 +81,14 @@ void ProcessThreadImpl::Start() RTC_NO_THREAD_SAFETY_ANALYSIS {
for (ModuleCallback& m : modules_)
m.module->ProcessThreadAttached(this);
thread_ = rtc::PlatformThread::SpawnJoinable(
[this] {
CurrentTaskQueueSetter set_current(this);
while (Process()) {
}
},
thread_name_);
thread_.reset(
new rtc::PlatformThread(&ProcessThreadImpl::Run, this, thread_name_));
thread_->Start();
}
void ProcessThreadImpl::Stop() {
RTC_DCHECK(thread_checker_.IsCurrent());
if (thread_.empty())
if (!thread_.get())
return;
{
@ -101,7 +98,9 @@ void ProcessThreadImpl::Stop() {
}
wake_up_.Set();
thread_.Finalize();
thread_->Stop();
thread_.reset();
StopNoLocks();
}
@ -109,7 +108,7 @@ void ProcessThreadImpl::Stop() {
// No locking needed, since this is called after the contending thread is
// stopped.
void ProcessThreadImpl::StopNoLocks() RTC_NO_THREAD_SAFETY_ANALYSIS {
RTC_DCHECK(thread_.empty());
RTC_DCHECK(!thread_);
stop_ = false;
for (ModuleCallback& m : modules_)
@ -200,7 +199,7 @@ void ProcessThreadImpl::RegisterModule(Module* module,
// Now that we know the module isn't in the list, we'll call out to notify
// the module that it's attached to the worker thread. We don't hold
// the lock while we make this call.
if (!thread_.empty())
if (thread_.get())
module->ProcessThreadAttached(this);
{
@ -228,6 +227,14 @@ void ProcessThreadImpl::DeRegisterModule(Module* module) {
module->ProcessThreadAttached(nullptr);
}
// static
void ProcessThreadImpl::Run(void* obj) {
ProcessThreadImpl* impl = static_cast<ProcessThreadImpl*>(obj);
CurrentTaskQueueSetter set_current(impl);
while (impl->Process()) {
}
}
bool ProcessThreadImpl::Process() {
TRACE_EVENT1("webrtc", "ProcessThreadImpl", "name", thread_name_);
int64_t now = rtc::TimeMillis();