/*
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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THE SOFTWARE.
*/

/**
Testcase Scenarios :

 (TestCase 1)::
 1) Check api behavior by passing numBlocks ptr as NULL.
 2) Pass invalid kernel function/NULL and check the api behavior.
 3) Pass blockSize as zero and check appropriate error-code is returned.
 4) Pass shm as max size_t and validate error-code returned.
 5) Test occupancy api with other possible flags.

 (TestCase 2)::
 6) Validate range by making sure (numBlock * blockSize) doesn't exceed
 devProp.maxThreadsPerMultiProcessor.
 7) Check range of out param after passing valid dynSharedMemPerBlk.

 (TestCase 3)::
 8) Test case for using kernel function pointer with template.

*/

/* HIT_START
 * BUILD: %t %s ../../test_common.cpp NVCC_OPTIONS --std=c++11
 * TEST: %t --tests 1
 * TEST: %t --tests 2
 * TEST: %t --tests 3
 * HIT_END
 */

#include <iostream>
#include <limits>
#include "test_common.h"

__global__ void f1(float *a) { *a = 1.0; }

template <typename T>
__global__ void f2(T *a) { *a = 1; }

/**
 * Defines
 */
#define OccupancyDisableCachingOverride 0x01

/**
 * Performs argument validation
 */
bool argValidation() {
  bool TestPassed = true;
  hipError_t ret;
  int numBlock = 0, blockSize = 0;
  int gridSize = 0, defBlkSize = 32;

  // Get potential blocksize
  HIPCHECK(hipOccupancyMaxPotentialBlockSize(&gridSize, &blockSize, f1, 0, 0));

  // Validate each argument
  if ((ret = hipOccupancyMaxActiveBlocksPerMultiprocessor(NULL, f1,
                   blockSize, 0)) != hipErrorInvalidValue) {
    printf("ArgValidation : Inappropriate error value returned for"
        " numBlock(NULL). Error: '%s'(%d)\n", hipGetErrorString(ret), ret);
    TestPassed &= false;
  }

  ret = hipOccupancyMaxActiveBlocksPerMultiprocessor(&numBlock, NULL,
                   blockSize, 0);
  if (ret != hipErrorInvalidValue && ret != hipErrorInvalidDeviceFunction) {
    printf("ArgValidation : Inappropriate error value returned for"
        "  kernelfunc(NULL). numBlk %d, Error: '%s'(%d)\n", numBlock,
        hipGetErrorString(ret), ret);
    TestPassed &= false;
  }

  if ((ret = hipOccupancyMaxActiveBlocksPerMultiprocessor(&numBlock,
                  f1, 0, 0)) != hipErrorInvalidValue) {
    printf("ArgValidation : Inappropriate error value returned for"
        " blksize(0), shm(0). numBlk %d, Error: '%s'(%d)\n", numBlock,
        hipGetErrorString(ret), ret);
    TestPassed &= false;
  }

  if ((ret = hipOccupancyMaxActiveBlocksPerMultiprocessor(&numBlock,
                  f1, 0, std::numeric_limits<std::size_t>::max()))
                  != hipErrorInvalidValue) {
    printf("ArgValidation : Inappropriate error value returned for"
        " blksize(0), shm(max). numBlk %d, Error: '%s'(%d)\n", numBlock,
        hipGetErrorString(ret), ret);
    TestPassed &= false;
  }

  if ((ret = hipOccupancyMaxActiveBlocksPerMultiprocessorWithFlags(&numBlock,
                  f1, defBlkSize, 0, OccupancyDisableCachingOverride))
                  != hipSuccess) {
    printf("ArgValidation : Occupancy api with flags returned '%s'(%d)."
        " Expected to return hipSuccess(0)\n", hipGetErrorString(ret), ret);
    TestPassed &= false;
  }

  return TestPassed;
}


/**
 * Performs range validation on api output
 */
bool rangeValidation() {
  hipDeviceProp_t devProp;
  bool TestPassed = true;
  int numBlock = 0, blockSize = 0;
  int gridSize = 0;

  // Get potential blocksize
  HIPCHECK(hipOccupancyMaxPotentialBlockSize(&gridSize, &blockSize, f1, 0, 0));

  HIPCHECK(hipGetDeviceProperties(&devProp, 0));

  HIPCHECK(hipOccupancyMaxActiveBlocksPerMultiprocessor(&numBlock, f1,
              blockSize, 0));

  // Check if numBlocks and blockSize are within limits
  if ((numBlock <= 0) ||
     ((numBlock * blockSize) > devProp.maxThreadsPerMultiProcessor)) {
    printf("RangeValidation : numBlock %d returned not in range."
           "numblk(%d),blocksize(%d) and maxThrdsMP %d", numBlock, numBlock,
           blockSize, devProp.maxThreadsPerMultiProcessor);
    TestPassed &= false;
  }

  // Validate numBlock after passing dynSharedMemPerBlk
  HIPCHECK(hipOccupancyMaxActiveBlocksPerMultiprocessor(&numBlock, f1,
              blockSize, devProp.sharedMemPerBlock));

  // Check if numBlocks and blockSize are within limits
  if ((numBlock <= 0) ||
     ((numBlock * blockSize) > devProp.maxThreadsPerMultiProcessor)) {
    printf("RangeValidation : numBlock %d returned not in range."
          "numblk(%d),blocksize(%d),shm and maxThrdsMP %d", numBlock, numBlock,
           blockSize, devProp.maxThreadsPerMultiProcessor);
    TestPassed &= false;
  }

  return TestPassed;
}

/**
 * Test case for using kernel function pointer with template
 */
bool templateInvocation() {
  bool TestPassed = true;
  int blockSize = 32;
  int numBlock = 0;

  HIPCHECK(hipOccupancyMaxActiveBlocksPerMultiprocessor<void(*)(int *)>
  (&numBlock, f2, blockSize, 0));
  if (!numBlock) {
    printf("TemplateInvocation : numBlock received as zero");
    TestPassed &= false;
  }

  return TestPassed;
}


int main(int argc, char* argv[]) {
  HipTest::parseStandardArguments(argc, argv, true);
  bool TestPassed = true;

  if (p_tests == 1) {
    TestPassed = argValidation();
  } else if (p_tests == 2) {
    TestPassed = rangeValidation();
  } else if (p_tests == 3) {
    TestPassed = templateInvocation();
  } else {
    printf("Didnt receive any valid option. Try options 1 to 3\n");
    TestPassed = false;
  }

  if (TestPassed) {
    passed();
  } else {
    failed("hipOccupancyMaxActiveBlocksPerMultiprocessor validation Failed!");
  }
}