// Copyright 2025 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "dawn/native/webgpu/BindGroupLayoutWGPU.h"

#include "dawn/native/webgpu/DeviceWGPU.h"
#include "dawn/native/webgpu/Forward.h"

namespace dawn::native::webgpu {

// static
ResultOrError<Ref<BindGroupLayout>> BindGroupLayout::Create(
    Device* device,
    const UnpackedPtr<BindGroupLayoutDescriptor>& descriptor) {
    return AcquireRef(new BindGroupLayout(device, descriptor));
}

BindGroupLayout::BindGroupLayout(Device* device,
                                 const UnpackedPtr<BindGroupLayoutDescriptor>& descriptor)
    : BindGroupLayoutInternalBase(device, descriptor),
      ObjectWGPU(device->wgpu.bindGroupLayoutRelease),
      mBindGroupAllocator(MakeFrontendBindGroupAllocator<BindGroup>(4096)) {
    auto desc = ToAPI(*descriptor);
    mInnerHandle = device->wgpu.deviceCreateBindGroupLayout(device->GetInnerHandle(), desc);
    DAWN_ASSERT(mInnerHandle);
}

Ref<BindGroup> BindGroupLayout::AllocateBindGroup(
    const UnpackedPtr<BindGroupDescriptor>& descriptor) {
    Device* device = ToBackend(GetDevice());
    return AcquireRef(mBindGroupAllocator->Allocate(device, descriptor));
}

void BindGroupLayout::DeallocateBindGroup(BindGroup* bindGroup) {
    mBindGroupAllocator->Deallocate(bindGroup);
}

void BindGroupLayout::ReduceMemoryUsage() {
    mBindGroupAllocator->DeleteEmptySlabs();
}

}  // namespace dawn::native::webgpu