/*
    Copyright 2005-2012 Intel Corporation.  All Rights Reserved.

    This file is part of Threading Building Blocks.

    Threading Building Blocks is free software; you can redistribute it
    and/or modify it under the terms of the GNU General Public License
    version 2 as published by the Free Software Foundation.

    Threading Building Blocks is distributed in the hope that it will be
    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Threading Building Blocks; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    As a special exception, you may use this file as part of a free software
    library without restriction.  Specifically, if other files instantiate
    templates or use macros or inline functions from this file, or you compile
    this file and link it with other files to produce an executable, this
    file does not by itself cause the resulting executable to be covered by
    the GNU General Public License.  This exception does not however
    invalidate any other reasons why the executable file might be covered by
    the GNU General Public License.
*/

#if _USRDLL

#include <stdlib.h>
#include "harness_defs.h"
#include "tbb/scalable_allocator.h"
#if __TBB_SOURCE_DIRECTLY_INCLUDED
#include "../tbbmalloc/tbbmalloc_internal_api.h"
#endif

#define HARNESS_CUSTOM_MAIN 1
#define HARNESS_NO_PARSE_COMMAND_LINE 1
#include "harness.h"
#include "harness_assert.h"

#if _WIN32||_WIN64
extern "C" {
    extern __declspec(dllexport) void callDll();
}
#endif

extern "C" void callDll()
{
    static const int NUM = 20;
    void *ptrs[NUM];

    for (int i=0; i<NUM; i++) {
        ptrs[i] = scalable_malloc(i*1024);
        ASSERT(ptrs[i], NULL);
    }
    for (int i=0; i<NUM; i++)
        scalable_free(ptrs[i]);
#if __TBB_SOURCE_DIRECTLY_INCLUDED && (_WIN32||_WIN64)
    __TBB_mallocThreadShutdownNotification();
#endif
}

#if __TBB_SOURCE_DIRECTLY_INCLUDED

struct RegisterProcessShutdownNotification {
    ~RegisterProcessShutdownNotification() {
        __TBB_mallocProcessShutdownNotification();
    }
};

static RegisterProcessShutdownNotification reg;

#endif

#else // _USRDLL

#define __TBB_NO_IMPLICIT_LINKAGE 1
#define HARNESS_NO_PARSE_COMMAND_LINE 1
#include "harness.h"
#include "harness_memory.h"
#include "harness_tbb_independence.h"
#include "harness_barrier.h"
#include "harness_dynamic_libs.h"

class UseDll {
    Harness::FunctionAddress run;
public:
    UseDll(Harness::FunctionAddress runPtr) : run(runPtr) { }
    void operator()( int /*id*/ ) const {
        (*run)();
    }
};

void LoadThreadsUnload()
{
    Harness::LIBRARY_HANDLE lib =
        Harness::OpenLibrary(TEST_LIBRARY_NAME("test_malloc_used_by_lib"));
    ASSERT(lib, "Can't load " TEST_LIBRARY_NAME("test_malloc_used_by_lib"));
    NativeParallelFor( 4, UseDll( Harness::GetAddress(lib, "callDll") ) );
    Harness::CloseLibrary(lib);
}

struct UnloadCallback {
    Harness::LIBRARY_HANDLE lib;

    void operator() () const {
        Harness::CloseLibrary(lib);
    }
};

struct RunWithLoad : NoAssign {
    static Harness::SpinBarrier startBarr, endBarr;
    static UnloadCallback unloadCallback;
    static Harness::FunctionAddress runPtr;

    void operator()(int id) const {
        if (!id) {
            Harness::LIBRARY_HANDLE lib =
                Harness::OpenLibrary(TEST_LIBRARY_NAME("test_malloc_used_by_lib"));
            ASSERT(lib, "Can't load "TEST_LIBRARY_NAME("test_malloc_used_by_lib"));
            runPtr = Harness::GetAddress(lib, "callDll");
            unloadCallback.lib = lib;
        }
        startBarr.wait();
        (*runPtr)();
        endBarr.wait(unloadCallback);
    }
};

Harness::SpinBarrier RunWithLoad::startBarr, RunWithLoad::endBarr;
UnloadCallback RunWithLoad::unloadCallback;
Harness::FunctionAddress RunWithLoad::runPtr;

void ThreadsLoadUnload()
{
    const int threads = 4;

    RunWithLoad::startBarr.initialize(threads);
    RunWithLoad::endBarr.initialize(threads);
    NativeParallelFor(threads, RunWithLoad());
}

int TestMain () {
    const int ITERS = 20;
    int i;
    std::ptrdiff_t memory_leak = 0;

    GetMemoryUsage();

    for (int run = 0; run<2; run++) {
        // expect that memory consumption stabilized after several runs
        for (i=0; i<ITERS; i++) {
            std::size_t memory_in_use = GetMemoryUsage();
            if (run)
                LoadThreadsUnload();
            else
                ThreadsLoadUnload();
            memory_leak = GetMemoryUsage() - memory_in_use;
            if (memory_leak == 0)  // possibly too strong?
                break;
        }
        if(i==ITERS) {
            // not stabilized, could be leak
            REPORT( "Error: memory leak of up to %ld bytes\n", static_cast<long>(memory_leak));
            exit(1);
        }
    }

    return Harness::Done;
}

#endif // _USRDLL
