/*
 * Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
 *
 * SPDX-License-Identifier: MIT
 */

#include "OCLAtomicCounter.h"

#include <assert.h>
#include <stdio.h>
#include <string.h>

#include "CL/cl.h"

const static unsigned int MaxCounters = 2;
const static char* strKernel =
    "#pragma OPENCL EXTENSION cl_ext_atomic_counters_32 : enable            \n"
    "__kernel void atomic_test(                                             \n"
    "   counter32_t counter0, counter32_t counter1, global uint* out_val)   \n"
    "{                                                                      \n"
    "   if (!get_global_id(0)) {                                            \n"
    "       uint val0 = atomic_inc(counter0);                               \n"
    "       uint val1 = atomic_dec(counter1);                               \n"
    "       out_val[0] = val0;                                              \n"
    "       out_val[1] = val1;                                              \n"
    "   }                                                                   \n"
    "}                                                                      \n";

OCLAtomicCounter::OCLAtomicCounter() {
  _numSubTests = 1;
  failed_ = false;
}

OCLAtomicCounter::~OCLAtomicCounter() {}

void OCLAtomicCounter::open(unsigned int test, char* units, double& conversion,
                            unsigned int deviceId) {
  OCLTestImp::open(test, units, conversion, deviceId);
  CHECK_RESULT((error_ != CL_SUCCESS), "Error opening");

  char name[1024] = {0};
  size_t size = 0;

  if (deviceId >= deviceCount_) {
    failed_ = true;
    return;
  }

  _wrapper->clGetDeviceInfo(devices_[deviceId], CL_DEVICE_EXTENSIONS, 1024, name, &size);
  if (!strstr(name, "cl_ext_atomic_counter")) {
    printf("Atomic counter extension is required for this test!\n");
    failed_ = true;
    return;
  }

  program_ = _wrapper->clCreateProgramWithSource(context_, 1, &strKernel, NULL, &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateProgramWithSource()  failed");

  error_ = _wrapper->clBuildProgram(program_, 1, &devices_[deviceId], "-legacy", NULL, NULL);
  if (error_ != CL_SUCCESS) {
    char programLog[1024];
    _wrapper->clGetProgramBuildInfo(program_, devices_[deviceId], CL_PROGRAM_BUILD_LOG, 1024,
                                    programLog, 0);
    printf("\n%s\n", programLog);
    fflush(stdout);
  }
  CHECK_RESULT((error_ != CL_SUCCESS), "clBuildProgram() failed");

  kernel_ = _wrapper->clCreateKernel(program_, "atomic_test", &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateKernel() failed");

  cl_mem buffer;
  for (unsigned int i = 0; i < MaxCounters; ++i) {
    buffer = _wrapper->clCreateBuffer(context_, CL_MEM_READ_WRITE, sizeof(cl_uint), NULL, &error_);
    CHECK_RESULT((error_ != CL_SUCCESS), "clCreateBuffer() failed");
    buffers_.push_back(buffer);
  }

  buffer = _wrapper->clCreateBuffer(context_, CL_MEM_READ_WRITE, MaxCounters * sizeof(cl_uint),
                                    NULL, &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateBuffer() failed");
  buffers_.push_back(buffer);
}

static void CL_CALLBACK notify_callback(const char* errinfo, const void* private_info, size_t cb,
                                        void* user_data) {}

void OCLAtomicCounter::run(void) {
  if (failed_) {
    return;
  }
  cl_uint initVal[2] = {5, 10};
  for (unsigned int i = 0; i < MaxCounters; ++i) {
    error_ = _wrapper->clEnqueueWriteBuffer(cmdQueues_[_deviceId], buffers()[i], true, 0,
                                            sizeof(cl_uint), &initVal[i], 0, NULL, NULL);
    CHECK_RESULT((error_ != CL_SUCCESS), "clEnqueueWriteBuffer() failed");
  }

  for (unsigned int i = 0; i < MaxCounters + 1; ++i) {
    cl_mem buffer = buffers()[i];
    error_ = _wrapper->clSetKernelArg(kernel_, i, sizeof(cl_mem), &buffer);
    CHECK_RESULT((error_ != CL_SUCCESS), "clSetKernelArg() failed");
  }

  size_t gws[1] = {64};
  error_ = _wrapper->clEnqueueNDRangeKernel(cmdQueues_[_deviceId], kernel_, 1, NULL, gws, NULL, 0,
                                            NULL, NULL);
  CHECK_RESULT((error_ != CL_SUCCESS), "clEnqueueNDRangeKernel() failed");

  cl_uint outputV[MaxCounters] = {0};

  // Find the new counter value
  initVal[0]++;
  initVal[1]--;

  for (unsigned int i = 0; i < MaxCounters; ++i) {
    cl_mem buffer = buffers()[i];
    error_ = _wrapper->clEnqueueReadBuffer(cmdQueues_[_deviceId], buffers()[i], true, 0,
                                           sizeof(cl_uint), &outputV[i], 0, NULL, NULL);
    CHECK_RESULT((error_ != CL_SUCCESS), "clEnqueueReadBuffer() failed");
    if (initVal[i] != outputV[i]) {
      printf("%d != %d", initVal[i], outputV[i]);
      CHECK_RESULT(true, " - Incorrect result for counter!\n");
    }
  }

  // Restore the original value to check the returned result in the kernel
  initVal[0]--;
  initVal[1]++;

  cl_mem buffer = buffers()[MaxCounters];
  error_ = _wrapper->clEnqueueReadBuffer(cmdQueues_[_deviceId], buffers()[MaxCounters], true, 0,
                                         MaxCounters * sizeof(cl_uint), outputV, 0, NULL, NULL);
  CHECK_RESULT((error_ != CL_SUCCESS), "clEnqueueReadBuffer() failed");
  for (unsigned int i = 0; i < MaxCounters; ++i) {
    if (initVal[i] != outputV[i]) {
      printf("%d != %d", initVal[i], outputV[i]);
      CHECK_RESULT(true,
                   " - Incorrect result for counter inside kernel. Returned "
                   "value != original.\n");
    }
  }
}

unsigned int OCLAtomicCounter::close(void) { return OCLTestImp::close(); }
