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refactor: clean up Session with CleanedUpAtExit (#24603)

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Jeremy Rose 2020-07-20 12:13:33 -07:00 • committed by GitHub
commit f0953902db
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4 changed files with 17 additions and 11 deletions
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2
shell/browser/api/electron_api_session.cc
View file

@ -942,8 +942,6 @@ gin::Handle<Session> Session::CreateFrom(
// The Sessions should never be garbage collected, since the common pattern is
// to use partition strings, instead of using the Session object directly.
handle->Pin(isolate);
ElectronBrowserMainParts::Get()->RegisterDestructionCallback(
base::BindOnce([](Session* session) { delete session; }, handle.get()));
App::Get()->EmitCustomEvent("session-created",
handle.ToV8().As<v8::Object>());

2
shell/browser/api/electron_api_session.h
View file

@ -15,6 +15,7 @@
#include "gin/wrappable.h"
#include "shell/browser/event_emitter_mixin.h"
#include "shell/browser/net/resolve_proxy_helper.h"
#include "shell/common/gin_helper/cleaned_up_at_exit.h"
#include "shell/common/gin_helper/error_thrower.h"
#include "shell/common/gin_helper/function_template_extensions.h"
#include "shell/common/gin_helper/pinnable.h"
@ -51,6 +52,7 @@ namespace api {
class Session : public gin::Wrappable<Session>,
public gin_helper::Pinnable<Session>,
public gin_helper::EventEmitterMixin<Session>,
public gin_helper::CleanedUpAtExit,
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
public SpellcheckHunspellDictionary::Observer,
#endif

6
shell/browser/javascript_environment.cc
View file

@ -46,7 +46,6 @@ JavascriptEnvironment::~JavascriptEnvironment() {
{
v8::Locker locker(isolate_);
v8::HandleScope scope(isolate_);
gin_helper::CleanedUpAtExit::DoCleanup();
context_.Get(isolate_)->Exit();
}
isolate_->Exit();
@ -97,6 +96,11 @@ void JavascriptEnvironment::OnMessageLoopCreated() {
void JavascriptEnvironment::OnMessageLoopDestroying() {
DCHECK(microtasks_runner_);
{
v8::Locker locker(isolate_);
v8::HandleScope scope(isolate_);
gin_helper::CleanedUpAtExit::DoCleanup();
}
base::MessageLoopCurrent::Get()->RemoveTaskObserver(microtasks_runner_.get());
platform_->DrainTasks(isolate_);
platform_->UnregisterIsolate(isolate_);

18
shell/common/gin_helper/cleaned_up_at_exit.cc
View file

@ -4,29 +4,31 @@
#include "shell/common/gin_helper/cleaned_up_at_exit.h"
#include "base/containers/flat_set.h"
#include <algorithm>
#include <vector>
#include "base/no_destructor.h"
namespace gin_helper {
base::flat_set<CleanedUpAtExit*>& GetDoomed() {
static base::NoDestructor<base::flat_set<CleanedUpAtExit*>> doomed;
std::vector<CleanedUpAtExit*>& GetDoomed() {
static base::NoDestructor<std::vector<CleanedUpAtExit*>> doomed;
return *doomed;
}
CleanedUpAtExit::CleanedUpAtExit() {
GetDoomed().insert(this);
GetDoomed().emplace_back(this);
}
CleanedUpAtExit::~CleanedUpAtExit() {
GetDoomed().erase(this);
auto& doomed = GetDoomed();
doomed.erase(std::remove(doomed.begin(), doomed.end(), this), doomed.end());
}
// static
void CleanedUpAtExit::DoCleanup() {
auto& doomed = GetDoomed();
while (!doomed.empty()) {
auto iter = doomed.begin();
delete *iter;
// It removed itself from the list.
CleanedUpAtExit* next = doomed.back();
delete next;
}
}