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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/threading/platform_thread.h"
#include <fidl/fuchsia.media/cpp/fidl.h>
#include <lib/fdio/directory.h>
#include <lib/sys/cpp/component_context.h>
#include <pthread.h>
#include <sched.h>
#include <zircon/syscalls.h>
#include <mutex>
#include <string_view>
#include "base/fuchsia/fuchsia_component_connect.h"
#include "base/fuchsia/fuchsia_logging.h"
#include "base/fuchsia/scheduler.h"
#include "base/no_destructor.h"
#include "base/threading/platform_thread_internal_posix.h"
#include "base/threading/thread_id_name_manager.h"
#include "base/threading/thread_local_storage.h"
namespace base {
namespace {
fidl::SyncClient<fuchsia_media::ProfileProvider> ConnectProfileProvider() {
auto profile_provider_client_end =
base::fuchsia_component::Connect<fuchsia_media::ProfileProvider>();
if (profile_provider_client_end.is_error()) {
LOG(ERROR) << base::FidlConnectionErrorMessage(profile_provider_client_end);
return {};
}
return fidl::SyncClient(std::move(profile_provider_client_end.value()));
}
// Sets the current thread to the given scheduling role, optionally including
// hints about the workload period and max CPU runtime (capacity * period) in
// that period.
// TODO(crbug.com/42050523): Migrate to the new
// fuchsia.scheduler.ProfileProvider API when available.
void SetThreadRole(std::string_view role_name,
TimeDelta period = {},
float capacity = 0.0f) {
DCHECK_GE(capacity, 0.0);
DCHECK_LE(capacity, 1.0);
static const base::NoDestructor<
fidl::SyncClient<fuchsia_media::ProfileProvider>>
profile_provider(ConnectProfileProvider());
if (!profile_provider->is_valid()) {
return;
}
zx::thread dup_thread;
zx_status_t status =
zx::thread::self()->duplicate(ZX_RIGHT_SAME_RIGHTS, &dup_thread);
ZX_CHECK(status == ZX_OK, status) << "zx_object_duplicate";
std::string role_selector{role_name};
auto result = (*profile_provider)
->RegisterHandlerWithCapacity(
{{.thread_handle = std::move(dup_thread),
.name = role_selector,
.period = period.ToZxDuration(),
.capacity = capacity}});
if (result.is_error()) {
ZX_DLOG(ERROR, result.error_value().status())
<< "Failed call to RegisterHandlerWithCapacity";
}
}
} // namespace
void InitThreading() {}
void TerminateOnThread() {}
size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) {
return 0;
}
// static
void PlatformThread::SetName(const std::string& name) {
zx_status_t status =
zx::thread::self()->set_property(ZX_PROP_NAME, name.data(), name.size());
DCHECK_EQ(status, ZX_OK);
SetNameCommon(name);
}
// static
bool PlatformThread::CanChangeThreadType(ThreadType from, ThreadType to) {
return from == to || to == ThreadType::kDisplayCritical ||
to == ThreadType::kInteractive || to == ThreadType::kRealtimeAudio;
}
namespace internal {
void SetCurrentThreadTypeImpl(ThreadType thread_type,
MessagePumpType pump_type_hint) {
switch (thread_type) {
case ThreadType::kDefault:
SetThreadRole("chromium.base.threading.default");
break;
case ThreadType::kBackground:
SetThreadRole("chromium.base.threading.background");
break;
case ThreadType::kUtility:
SetThreadRole("chromium.base.threading.utility");
break;
case ThreadType::kDisplayCritical:
case ThreadType::kInteractive:
SetThreadRole("chromium.base.threading.display", kDisplaySchedulingPeriod,
kDisplaySchedulingCapacity);
break;
case ThreadType::kRealtimeAudio:
SetThreadRole("chromium.base.threading.realtime-audio",
kAudioSchedulingPeriod, kAudioSchedulingCapacity);
break;
}
}
} // namespace internal
// static
ThreadPriorityForTest PlatformThread::GetCurrentThreadPriorityForTest() {
// Fuchsia doesn't provide a way to get the current thread's priority.
// Use ThreadType stored in TLS as a proxy.
const ThreadType thread_type = PlatformThread::GetCurrentThreadType();
switch (thread_type) {
case ThreadType::kBackground:
case ThreadType::kUtility:
case ThreadType::kDefault:
return ThreadPriorityForTest::kNormal;
case ThreadType::kDisplayCritical:
case ThreadType::kInteractive:
return ThreadPriorityForTest::kDisplay;
case ThreadType::kRealtimeAudio:
return ThreadPriorityForTest::kRealtimeAudio;
}
}
} // namespace base
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