//
// Copyright (c) 2016-2023 The Khronos Group Inc.
//
// 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 "testBase.h"
#include "types.hpp"

template<typename T>
int test_atomic(cl_device_id deviceID, cl_context context,
                cl_command_queue queue, const char *name,
                const int num,
                bool is_inc)
{
    clProgramWrapper prog;
    cl_int err = get_program_with_il(prog, deviceID, context, name);
    SPIRV_CHECK_ERROR(err, "Failed to build program");

    clKernelWrapper kernel = clCreateKernel(prog, name, &err);
    SPIRV_CHECK_ERROR(err, "Failed to create kernel");

    size_t bytes = num * sizeof(T);
    clMemWrapper ctr_mem = clCreateBuffer(context, CL_MEM_READ_WRITE, sizeof(T), NULL, &err);
    SPIRV_CHECK_ERROR(err, "Failed to create buffer");

    T initial, result;

    if (is_inc) {
        initial = 0;
         result = num;
    } else {
        initial = num;
         result = 0;
    }

    err = clEnqueueWriteBuffer(queue, ctr_mem, CL_TRUE, 0, sizeof(T), &initial, 0, NULL, NULL);
    SPIRV_CHECK_ERROR(err, "Failed to copy to lhs buffer");

    clMemWrapper val_mem = clCreateBuffer(context, CL_MEM_READ_WRITE, bytes, NULL, &err);
    SPIRV_CHECK_ERROR(err, "Failed to create buffer");

    err = clSetKernelArg(kernel, 0, sizeof(cl_mem), &val_mem);
    SPIRV_CHECK_ERROR(err, "Failed to set kernel argument");

    err = clSetKernelArg(kernel, 1, sizeof(cl_mem), &ctr_mem);
    SPIRV_CHECK_ERROR(err, "Failed to set kernel argument");

    size_t global = num;
    err = clEnqueueNDRangeKernel(queue, kernel, 1, NULL, &global, NULL, 0, NULL, NULL);
    SPIRV_CHECK_ERROR(err, "Failed to enqueue kernel");

    T count = 0;
    err = clEnqueueReadBuffer(queue, ctr_mem, CL_TRUE, 0, sizeof(T), &count, 0, NULL, NULL);

    if (count !=  result) {
        log_error("Counter value does not match. Expected: %d, Found: %d\n",  result, (int)count);
        return -1;
    }

    std::vector<cl_int> flags(num, 0);
    std::vector<cl_int> locs(num, -1);
    std::vector<T> host(num);
    err = clEnqueueReadBuffer(queue, val_mem, CL_TRUE, 0, bytes, &host[0], 0, NULL, NULL);
    SPIRV_CHECK_ERROR(err, "Failed to copy from cl_buffer");

    for (int i = 0; i < num; i++) {
        T idx = host[i] - (is_inc ? 0 : 1);
        if (flags[idx] == 1) {
            log_error("Atomic inc value is repeated at %d and %d\n", locs[idx], i);
            return -1;
        } else {
            flags[idx] = 1;
            locs[idx] = i;
        }
    }
    return 0;
}

REGISTER_TEST(op_atomic_inc_global)
{
    int num = 1 << 16;
    return test_atomic<cl_int>(device, context, queue, "atomic_inc_global", num,
                               true);
}

REGISTER_TEST(op_atomic_dec_global)
{
    int num = 1 << 16;
    return test_atomic<cl_int>(device, context, queue, "atomic_dec_global", num,
                               false);
}