//
// Copyright (c) 2017 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 "harness/compat.h"

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "procs.h"
#include "harness/errorHelpers.h"

const char* pipe_readwrite_errors_kernel_code = {
    "__kernel void test_pipe_write_error(__global int *src, __write_only pipe int out_pipe, __global int *status)\n"
    "{\n"
    "    int gid = get_global_id(0);\n"
    "    int reserve_idx;\n"
    "    reserve_id_t res_id;\n"
    "\n"
    "    res_id = reserve_write_pipe(out_pipe, 1);\n"
    "    if(is_valid_reserve_id(res_id))\n"
    "    {\n"
    "        write_pipe(out_pipe, res_id, 0, &src[gid]);\n"
    "        commit_write_pipe(out_pipe, res_id);\n"
    "    }\n"
    "    else\n"
    "    {\n"
    "        *status = -1;\n"
    "    }\n"
    "}\n"
    "\n"
    "__kernel void test_pipe_read_error(__read_only pipe int in_pipe, __global int *dst, __global int *status)\n"
    "{\n"
    "    int gid = get_global_id(0);\n"
    "    int reserve_idx;\n"
    "    reserve_id_t res_id;\n"
    "\n"
    "    res_id = reserve_read_pipe(in_pipe, 1);\n"
    "    if(is_valid_reserve_id(res_id))\n"
    "    {\n"
    "        read_pipe(in_pipe, res_id, 0, &dst[gid]);\n"
    "        commit_read_pipe(in_pipe, res_id);\n"
    "    }\n"
    "    else\n"
    "    {\n"
    "        *status = -1;\n"
    "    }\n"
    "}\n"
};


int test_pipe_readwrite_errors(cl_device_id deviceID, cl_context context, cl_command_queue queue, int num_elements)
{
    clMemWrapper pipe;
    clMemWrapper buffers[3];
    void *outptr;
    cl_int *inptr;
    clProgramWrapper program;
    clKernelWrapper kernel[2];
    size_t global_work_size[3];
    cl_int err;
    cl_int size;
    cl_int i;
    cl_int status = 0;
    clEventWrapper producer_sync_event;
    clEventWrapper consumer_sync_event;
    BufferOwningPtr<cl_int> BufferInPtr;
    BufferOwningPtr<cl_int> BufferOutPtr;
    MTdataHolder d(gRandomSeed);
    const char *kernelName[] = { "test_pipe_write_error",
                                 "test_pipe_read_error" };

    size_t min_alignment = get_min_alignment(context);

    global_work_size[0] = num_elements;

    size = num_elements * sizeof(cl_int);

    inptr = (cl_int *)align_malloc(size, min_alignment);

    for (i = 0; i < num_elements; i++)
    {
        inptr[i] = (int)genrand_int32(d);
    }
    BufferInPtr.reset(inptr, nullptr, 0, size, true);

    buffers[0] =
        clCreateBuffer(context, CL_MEM_COPY_HOST_PTR, size, inptr, &err);
    test_error_ret(err, " clCreateBuffer failed", -1);

    outptr = align_malloc(size, min_alignment);
    BufferOutPtr.reset(outptr, nullptr, 0, size, true);

    buffers[1] = clCreateBuffer(context, CL_MEM_USE_HOST_PTR,  size, outptr, &err);
    test_error_ret(err, " clCreateBuffer failed", -1);

    buffers[2] = clCreateBuffer(context, CL_MEM_COPY_HOST_PTR,  sizeof(int), &status, &err);
    test_error_ret(err, " clCreateBuffer failed", -1);

    //Pipe created with max_packets less than global size
    pipe = clCreatePipe(context, CL_MEM_HOST_NO_ACCESS, sizeof(int), num_elements - (num_elements/2), NULL, &err);
    test_error_ret(err, " clCreatePipe failed", -1);

    // Create producer kernel
    err = create_single_kernel_helper_with_build_options(context, &program, &kernel[0], 1, (const char**)&pipe_readwrite_errors_kernel_code, kernelName[0], "-cl-std=CL2.0");
    test_error_ret(err, " Error creating program", -1);

    //Create consumer kernel
    kernel[1] = clCreateKernel(program, kernelName[1], &err);
    test_error_ret(err, " Error creating kernel", -1);

    err = clSetKernelArg(kernel[0], 0, sizeof(cl_mem), (void*)&buffers[0]);
    err |= clSetKernelArg(kernel[0], 1, sizeof(cl_mem), (void*)&pipe);
    err |= clSetKernelArg(kernel[0], 2, sizeof(cl_mem), (void*)&buffers[2]);
    err |= clSetKernelArg(kernel[1], 0, sizeof(cl_mem), (void*)&pipe);
    err |= clSetKernelArg(kernel[1], 1, sizeof(cl_mem), (void*)&buffers[1]);
    err |= clSetKernelArg(kernel[1], 2, sizeof(cl_mem), (void*)&buffers[2]);

    test_error_ret(err, " clSetKernelArg failed", -1);

    // Launch Consumer kernel for empty pipe
    err = clEnqueueNDRangeKernel( queue, kernel[1], 1, NULL, global_work_size, NULL, 0, NULL, &consumer_sync_event );
    test_error_ret(err, " clEnqueueNDRangeKernel failed", -1);

    err = clEnqueueReadBuffer(queue, buffers[2], true, 0, sizeof(status), &status, 1, &consumer_sync_event, NULL);
    test_error_ret(err, " clEnqueueReadBuffer failed", -1);

    if(status == 0){
        log_error("test_pipe_readwrite_errors failed\n");
        return -1;
    }
    else{
        status = 0;
    }

    // Launch Producer kernel
    err = clEnqueueNDRangeKernel( queue, kernel[0], 1, NULL, global_work_size, NULL, 0, NULL, &producer_sync_event );
    test_error_ret(err, " clEnqueueNDRangeKernel failed", -1);

    err = clEnqueueReadBuffer(queue, buffers[2], true, 0, sizeof(status), &status, 1, &producer_sync_event, NULL);
    test_error_ret(err, " clEnqueueReadBuffer failed", -1);

    if (status == 0)
    {
        log_error("test_pipe_readwrite_errors failed\n");
        return -1;
    }
    else{
        status = 0;
    }

    // We will reuse this variable so release the previous referred event.
    clReleaseEvent(consumer_sync_event);

    // Launch Consumer kernel
    err = clEnqueueNDRangeKernel( queue, kernel[1], 1, NULL, global_work_size, NULL, 1, &producer_sync_event, &consumer_sync_event );
    test_error_ret(err, " clEnqueueNDRangeKernel failed", -1);

    err = clEnqueueReadBuffer(queue, buffers[2], true, 0, sizeof(status), &status, 1, &consumer_sync_event, NULL);
    test_error_ret(err, " clEnqueueReadBuffer failed", -1);

    if (status == 0)
    {
        log_error("test_pipe_readwrite_errors failed\n");
        return -1;
    }
    else
    {
        status = 0;
    }

    log_info("test_pipe_readwrite_errors passed\n");

    return 0;
}