/*
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The above copyright notice and this permission notice shall be included in
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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*/

#include <hip_test_checkers.hh>
#include <hip_test_kernels.hh>


int p_iters = 10;
int N = 8000000;
unsigned blocksPerCU = 6;
unsigned threadsPerBlock = 256;

//---
// Test simple H2D copies and back.
// Designed to stress a small number of simple smoke tests

template <typename T = float, class P = HipTest::Unpinned, class C = HipTest::Memcpy>
void simpleVectorAdd(size_t numElements, int iters, hipStream_t stream) {
    using HipTest::MemTraits;
    size_t Nbytes = numElements * sizeof(T);

    T *A_d, *B_d, *C_d;
    T *A_h, *B_h, *C_h;

    HipTest::initArrays(&A_d, &B_d, &C_d, &A_h, &B_h, &C_h, N, P::isPinned);
    for (size_t i = 0; i < numElements; i++) {
        A_h[i] = 1000.0f;
        B_h[i] = 2000.0f;
        C_h[i] = -1;
    }

    MemTraits<C>::Copy(B_d, B_h, Nbytes, hipMemcpyHostToDevice, stream);
    MemTraits<C>::Copy(A_d, A_h, Nbytes, hipMemcpyHostToDevice, stream);
    MemTraits<C>::Copy(C_d, C_h, Nbytes, hipMemcpyHostToDevice, stream);
    HIPCHECK(hipDeviceSynchronize());

    for (size_t i = 0; i < numElements; i++) {
        A_h[i] = 1.0f;
        B_h[i] = 2.0f;
        C_h[i] = -1;
    }


    for (int i = 0; i < iters; i++) {
        unsigned blocks = HipTest::setNumBlocks(blocksPerCU, threadsPerBlock, numElements);

        MemTraits<C>::Copy(A_d, A_h, Nbytes, hipMemcpyHostToDevice, stream);
        MemTraits<C>::Copy(B_d, B_h, Nbytes, hipMemcpyHostToDevice, stream);

        hipLaunchKernelGGL(HipTest::vectorADDReverse, dim3(blocks), dim3(threadsPerBlock), 0, 0,
                        static_cast<const T*>(A_d), static_cast<const T*>(B_d), C_d, numElements);
        HIP_CHECK(hipGetLastError()); 

        MemTraits<C>::Copy(C_h, C_d, Nbytes, hipMemcpyDeviceToHost, stream);

        HIPCHECK(hipDeviceSynchronize());

        HipTest::checkVectorADD(A_h, B_h, C_h, numElements);
    }

    HipTest::freeArrays(A_d, B_d, C_d, A_h, B_h, C_h, P::isPinned);
    HIPCHECK(hipDeviceSynchronize());
}

template <typename T, class C>
void test_multiThread_1(hipStream_t stream0, hipStream_t stream1, bool serialize) {

    size_t numElements = N;

    // Test 2 threads operating on same stream:
    std::thread t1(simpleVectorAdd<T, HipTest::Pinned, C>, numElements, p_iters /*iters*/, stream0);
    if (serialize) {
        t1.join();
    }
    std::thread t2(simpleVectorAdd<T, HipTest::Pinned, C>, numElements, p_iters /*iters*/, stream1);
    if (serialize) {
        t2.join();
    }

    if (!serialize) {
        t1.join();
        t2.join();
    }

    HIPCHECK(hipDeviceSynchronize());
};

TEST_CASE("Unit_hipMultiThreadStreams1_AsyncSync") {

    hipStream_t stream;
    HIPCHECK(hipStreamCreate(&stream));

    simpleVectorAdd<float, HipTest::Pinned, HipTest::MemcpyAsync>(N /*mb*/, 10 /*iters*/, stream);
    simpleVectorAdd<float, HipTest::Pinned, HipTest::Memcpy>(N /*mb*/, 10 /*iters*/, stream);

    HIPCHECK(hipStreamDestroy(stream));
}

TEST_CASE("Unit_hipMultiThreadStreams1_AsyncAsync") {
    hipStream_t stream0, stream1;
    HIPCHECK(hipStreamCreate(&stream0));
    HIPCHECK(hipStreamCreate(&stream1));

    // Easy tests to verify the test works - these don't allow overlap between the threads:
    test_multiThread_1<float, HipTest::MemcpyAsync>(NULL, NULL, true);
    test_multiThread_1<float, HipTest::MemcpyAsync>(stream0, stream1, true);

    HIPCHECK(hipStreamDestroy(stream0));
    HIPCHECK(hipStreamDestroy(stream1));
}
TEST_CASE("Unit_hipMultiThreadStreams1_AsyncSame") {
    hipStream_t stream;
    HIPCHECK(hipStreamCreate(&stream));

        // test_multiThread_1<float, HipTest::MemcpyAsync> ("Multithread with NULL stream", NULL,
        // NULL, false); test_multiThread_1<float, HipTest::MemcpyAsync> ("Multithread with two
        // streams", stream0, stream1, false);
    test_multiThread_1<float, HipTest::MemcpyAsync>(stream, stream, false);

    HIPCHECK(hipStreamDestroy(stream));
}
