/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * 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 "Context.h"
#include "Device.h"

#include <android-base/logging.h>
#include <android/dlext.h>
#include <dlfcn.h>

namespace android {
namespace hardware {
namespace renderscript {
namespace V1_0 {
namespace implementation {


static dispatchTable loadHAL();
dispatchTable Device::mDispatchHal = loadHAL();

Device::Device() {
}

dispatchTable& Device::getHal() {
    return mDispatchHal;
}


// Methods from ::android::hardware::renderscript::V1_0::IDevice follow.

Return<sp<IContext>> Device::contextCreate(uint32_t sdkVersion, ContextType ct, int32_t flags) {
    return new Context(sdkVersion, ct, flags);
}


// Methods from ::android::hidl::base::V1_0::IBase follow.

IDevice* HIDL_FETCH_IDevice(const char* /* name */) {
    return new Device();
}

// Helper function
dispatchTable loadHAL() {

    static_assert(sizeof(void*) <= sizeof(uint64_t), "RenderScript HIDL Error: sizeof(void*) > sizeof(uint64_t)");
    static_assert(sizeof(size_t) <= sizeof(uint64_t), "RenderScript HIDL Error: sizeof(size_t) > sizeof(uint64_t)");

    const char* filename = "libRS_internal.so";
    // Try to load libRS_internal.so from the "rs" namespace directly.
    typedef struct android_namespace_t* (*GetExportedNamespaceFnPtr)(const char*);
    GetExportedNamespaceFnPtr getExportedNamespace = reinterpret_cast<GetExportedNamespaceFnPtr>(
        dlsym(RTLD_DEFAULT, "android_get_exported_namespace"));
    void* handle = nullptr;
    if (getExportedNamespace != nullptr) {
        android_namespace_t* rsNamespace = getExportedNamespace("rs");
        if (rsNamespace != nullptr) {
            const android_dlextinfo dlextinfo = {
                .flags = ANDROID_DLEXT_USE_NAMESPACE, .library_namespace = rsNamespace,
            };
            handle = android_dlopen_ext(filename, RTLD_LAZY | RTLD_LOCAL, &dlextinfo);
            if (handle == nullptr) {
                LOG(WARNING) << "android_dlopen_ext(" << filename << ") failed: " << dlerror();
            }
        }
    }
    if (handle == nullptr) {
        // if there is no "rs" namespace (in case when this HAL impl is loaded
        // into a vendor process), then use the plain dlopen.
        handle = dlopen(filename, RTLD_LAZY | RTLD_LOCAL);
        if (handle == nullptr) {
            LOG(FATAL) << "dlopen(" << filename << ") failed: " << dlerror();
        }
    }

    dispatchTable dispatchHal = {
            .SetNativeLibDir = (SetNativeLibDirFnPtr) nullptr,

            .Allocation1DData = (Allocation1DDataFnPtr)dlsym(handle, "rsAllocation1DData"),
            .Allocation1DElementData = (Allocation1DElementDataFnPtr) nullptr,
            .Allocation1DRead = (Allocation1DReadFnPtr)dlsym(handle, "rsAllocation1DRead"),
            .Allocation2DData = (Allocation2DDataFnPtr)dlsym(handle, "rsAllocation2DData"),
            .Allocation2DRead = (Allocation2DReadFnPtr)dlsym(handle, "rsAllocation2DRead"),
            .Allocation3DData = (Allocation3DDataFnPtr)dlsym(handle, "rsAllocation3DData"),
            .Allocation3DRead = (Allocation3DReadFnPtr)dlsym(handle, "rsAllocation3DRead"),
            .AllocationAdapterCreate =
                    (AllocationAdapterCreateFnPtr)dlsym(handle, "rsAllocationAdapterCreate"),
            .AllocationAdapterOffset =
                    (AllocationAdapterOffsetFnPtr)dlsym(handle, "rsAllocationAdapterOffset"),
            .AllocationCopy2DRange =
                    (AllocationCopy2DRangeFnPtr)dlsym(handle, "rsAllocationCopy2DRange"),
            .AllocationCopy3DRange =
                    (AllocationCopy3DRangeFnPtr)dlsym(handle, "rsAllocationCopy3DRange"),
            .AllocationCopyToBitmap =
                    (AllocationCopyToBitmapFnPtr)dlsym(handle, "rsAllocationCopyToBitmap"),
            .AllocationCreateFromBitmap =
                    (AllocationCreateFromBitmapFnPtr)dlsym(handle, "rsAllocationCreateFromBitmap"),
            .AllocationCreateStrided =
                    (AllocationCreateStridedFnPtr)dlsym(handle, "rsAllocationCreateStrided"),
            .AllocationCreateTyped =
                    (AllocationCreateTypedFnPtr)dlsym(handle, "rsAllocationCreateTyped"),
            .AllocationCubeCreateFromBitmap = (AllocationCubeCreateFromBitmapFnPtr)dlsym(
                    handle, "rsAllocationCubeCreateFromBitmap"),
            .AllocationElementData =
                    (AllocationElementDataFnPtr)dlsym(handle, "rsAllocationElementData"),
            .AllocationElementRead =
                    (AllocationElementReadFnPtr)dlsym(handle, "rsAllocationElementRead"),
            .AllocationGenerateMipmaps =
                    (AllocationGenerateMipmapsFnPtr)dlsym(handle, "rsAllocationGenerateMipmaps"),
            .AllocationGetPointer =
                    (AllocationGetPointerFnPtr)dlsym(handle, "rsAllocationGetPointer"),
            .AllocationGetSurface =
                    (AllocationGetSurfaceFnPtr)dlsym(handle, "rsAllocationGetSurface"),
            .AllocationGetType = (AllocationGetTypeFnPtr)dlsym(handle, "rsaAllocationGetType"),
            .AllocationIoReceive = (AllocationIoReceiveFnPtr)dlsym(handle, "rsAllocationIoReceive"),
            .AllocationIoSend = (AllocationIoSendFnPtr)dlsym(handle, "rsAllocationIoSend"),
            .AllocationRead = (AllocationReadFnPtr)dlsym(handle, "rsAllocationRead"),
            .AllocationResize1D = (AllocationResize1DFnPtr)dlsym(handle, "rsAllocationResize1D"),
            .AllocationSetSurface =
                    (AllocationSetSurfaceFnPtr)dlsym(handle, "rsAllocationSetSurface"),
            .AllocationSyncAll = (AllocationSyncAllFnPtr)dlsym(handle, "rsAllocationSyncAll"),
            .AllocationSetupBufferQueue =
                    (AllocationSetupBufferQueueFnPtr)dlsym(handle, "rsAllocationSetupBufferQueue"),
            .AllocationShareBufferQueue =
                    (AllocationShareBufferQueueFnPtr)dlsym(handle, "rsAllocationShareBufferQueue"),
            .AssignName = (AssignNameFnPtr)dlsym(handle, "rsAssignName"),
            .ClosureCreate = (ClosureCreateFnPtr)dlsym(handle, "rsClosureCreate"),
            .ClosureSetArg = (ClosureSetArgFnPtr)dlsym(handle, "rsClosureSetArg"),
            .ClosureSetGlobal = (ClosureSetGlobalFnPtr)dlsym(handle, "rsClosureSetGlobal"),
            .ContextCreateVendor = (ContextCreateVendorFnPtr)dlsym(handle, "rsContextCreateVendor"),
            .ContextDeinitToClient =
                    (ContextDeinitToClientFnPtr)dlsym(handle, "rsContextDeinitToClient"),
            .ContextDestroy = (ContextDestroyFnPtr)dlsym(handle, "rsContextDestroy"),
            .ContextDump = (ContextDumpFnPtr)dlsym(handle, "rsContextDump"),
            .ContextFinish = (ContextFinishFnPtr)dlsym(handle, "rsContextFinish"),
            .ContextGetMessage = (ContextGetMessageFnPtr)dlsym(handle, "rsContextGetMessage"),
            .ContextInitToClient = (ContextInitToClientFnPtr)dlsym(handle, "rsContextInitToClient"),
            .ContextPeekMessage = (ContextPeekMessageFnPtr)dlsym(handle, "rsContextPeekMessage"),
            .ContextSendMessage = (ContextSendMessageFnPtr)dlsym(handle, "rsContextSendMessage"),
            .ContextSetPriority = (ContextSetPriorityFnPtr)dlsym(handle, "rsContextSetPriority"),
            .ContextSetCacheDir = (ContextSetCacheDirFnPtr)dlsym(handle, "rsContextSetCacheDir"),
            .DeviceCreate = (DeviceCreateFnPtr) nullptr,
            .DeviceDestroy = (DeviceDestroyFnPtr) nullptr,
            .DeviceSetConfig = (DeviceSetConfigFnPtr) nullptr,
            .ElementCreate2 = (ElementCreate2FnPtr)dlsym(handle, "rsElementCreate2"),
            .ElementCreate = (ElementCreateFnPtr)dlsym(handle, "rsElementCreate"),
            .ElementGetNativeData =
                    (ElementGetNativeDataFnPtr)dlsym(handle, "rsaElementGetNativeData"),
            .ElementGetSubElements =
                    (ElementGetSubElementsFnPtr)dlsym(handle, "rsaElementGetSubElements"),
            .GetName = (GetNameFnPtr)dlsym(handle, "rsaGetName"),
            .InvokeClosureCreate = (InvokeClosureCreateFnPtr)dlsym(handle, "rsInvokeClosureCreate"),
            .ObjDestroy = (ObjDestroyFnPtr)dlsym(handle, "rsObjDestroy"),
            .SamplerCreate = (SamplerCreateFnPtr)dlsym(handle, "rsSamplerCreate"),
            .ScriptBindAllocation =
                    (ScriptBindAllocationFnPtr)dlsym(handle, "rsScriptBindAllocation"),
            .ScriptCCreate = (ScriptCCreateFnPtr)dlsym(handle, "rsScriptCCreate"),
            .ScriptFieldIDCreate = (ScriptFieldIDCreateFnPtr)dlsym(handle, "rsScriptFieldIDCreate"),
            .ScriptForEach = (ScriptForEachFnPtr) nullptr,
            .ScriptForEachMulti = (ScriptForEachMultiFnPtr)dlsym(handle, "rsScriptForEachMulti"),
            .ScriptGetVarV = (ScriptGetVarVFnPtr)dlsym(handle, "rsScriptGetVarV"),
            .ScriptGroup2Create = (ScriptGroup2CreateFnPtr)dlsym(handle, "rsScriptGroup2Create"),
            .ScriptGroupCreate = (ScriptGroupCreateFnPtr)dlsym(handle, "rsScriptGroupCreate"),
            .ScriptGroupExecute = (ScriptGroupExecuteFnPtr)dlsym(handle, "rsScriptGroupExecute"),
            .ScriptGroupSetInput = (ScriptGroupSetInputFnPtr)dlsym(handle, "rsScriptGroupSetInput"),
            .ScriptGroupSetOutput =
                    (ScriptGroupSetOutputFnPtr)dlsym(handle, "rsScriptGroupSetOutput"),
            .ScriptIntrinsicCreate =
                    (ScriptIntrinsicCreateFnPtr)dlsym(handle, "rsScriptIntrinsicCreate"),
            .ScriptInvoke = (ScriptInvokeFnPtr)dlsym(handle, "rsScriptInvoke"),
            .ScriptInvokeIDCreate =
                    (ScriptInvokeIDCreateFnPtr)dlsym(handle, "rsScriptInvokeIDCreate"),
            .ScriptInvokeV = (ScriptInvokeVFnPtr)dlsym(handle, "rsScriptInvokeV"),
            .ScriptKernelIDCreate =
                    (ScriptKernelIDCreateFnPtr)dlsym(handle, "rsScriptKernelIDCreate"),
            .ScriptReduce = (ScriptReduceFnPtr)dlsym(handle, "rsScriptReduce"),
            .ScriptSetTimeZone = (ScriptSetTimeZoneFnPtr)dlsym(handle, "rsScriptSetTimeZone"),
            .ScriptSetVarD = (ScriptSetVarDFnPtr)dlsym(handle, "rsScriptSetVarD"),
            .ScriptSetVarF = (ScriptSetVarFFnPtr)dlsym(handle, "rsScriptSetVarF"),
            .ScriptSetVarI = (ScriptSetVarIFnPtr)dlsym(handle, "rsScriptSetVarI"),
            .ScriptSetVarJ = (ScriptSetVarJFnPtr)dlsym(handle, "rsScriptSetVarJ"),
            .ScriptSetVarObj = (ScriptSetVarObjFnPtr)dlsym(handle, "rsScriptSetVarObj"),
            .ScriptSetVarVE = (ScriptSetVarVEFnPtr)dlsym(handle, "rsScriptSetVarVE"),
            .ScriptSetVarV = (ScriptSetVarVFnPtr)dlsym(handle, "rsScriptSetVarV"),
            .TypeCreate = (TypeCreateFnPtr)dlsym(handle, "rsTypeCreate"),
            .TypeGetNativeData = (TypeGetNativeDataFnPtr)dlsym(handle, "rsaTypeGetNativeData"),
    };

    return dispatchHal;
}

}  // namespace implementation
}  // namespace V1_0
}  // namespace renderscript
}  // namespace hardware
}  // namespace android