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// Copyright 2017 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "starboard/thread.h"
#include <windows.h>
#include "starboard/common/mutex.h"
#include "starboard/memory.h"
#include "starboard/shared/win32/thread_local_internal.h"
#include "starboard/shared/win32/thread_private.h"
using starboard::shared::win32::GetThreadSubsystemSingleton;
using starboard::shared::win32::ThreadSubsystemSingleton;
namespace starboard {
namespace shared {
namespace win32 {
SbThreadLocalKey SbThreadCreateLocalKeyInternal(
SbThreadLocalDestructor destructor,
ThreadSubsystemSingleton* singleton) {
// Note that destructor used here to allow destruction of objects created by
// TLS access by non-starboard threads.
// Note that FlsAlloc's destructor mechanism is insufficient to pass
// base_unittests, which expects that multiple destructor passes for
// objects which insert destructable TLS pointers as side effects. For
// starboard threads, the TLS destructors will run first and set the
// TLS pointers to null, then the destructors will run a second time
// but this is okay since the pointers will now be nullptrs, which is
// a no-op. For non starboard threads, only the secondary destructor
// will run.
DWORD index = TlsInternalAlloc(destructor);
if (index == TLS_OUT_OF_INDEXES) {
return kSbThreadLocalKeyInvalid;
}
SbThreadLocalKeyPrivate* result = static_cast<SbThreadLocalKeyPrivate*>(
malloc(sizeof(SbThreadLocalKeyPrivate)));
if (result == nullptr) {
return kSbThreadLocalKeyInvalid;
}
result->tls_index = index;
result->destructor = destructor;
SbMutexAcquire(&singleton->mutex_);
singleton->thread_local_keys_.insert(std::make_pair(index, result));
SbMutexRelease(&singleton->mutex_);
return result;
}
} // namespace win32
} // namespace shared
} // namespace starboard
SbThreadLocalKey SbThreadCreateLocalKey(SbThreadLocalDestructor destructor) {
ThreadSubsystemSingleton* singleton = GetThreadSubsystemSingleton();
return SbThreadCreateLocalKeyInternal(destructor, singleton);
}