/*
 * Copyright 2013, Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Ingo Weinhold <ingo_weinhold@gmx.de>
 */


#include <package/solver/Solver.h>


typedef BPackageKit::BSolver* CreateSolverFunction();


#include <dlfcn.h>
#include <pthread.h>


static CreateSolverFunction* sCreateSolver = NULL;

static pthread_once_t sLoadLibsolvSolverAddOnInitOnce = PTHREAD_ONCE_INIT;


static void
load_libsolv_solver_add_on()
{
        int flags = 0;
#ifdef HAIKU_TARGET_PLATFORM_HAIKU
        void* imageHandle = dlopen("libpackage-add-on-libsolv.so", flags);
#else
#ifdef HAIKU_HOST_PLATFORM_LINUX
        flags = RTLD_LAZY | RTLD_LOCAL;
#endif
        void* imageHandle = dlopen("libpackage-add-on-libsolv_build.so", flags);
#endif
        if (imageHandle == NULL)
                return;

        sCreateSolver = (CreateSolverFunction*)dlsym(imageHandle, "create_solver");
        if (sCreateSolver == NULL)
                dlclose(imageHandle);
}


namespace BPackageKit {


BSolver::BSolver()
{
}


BSolver::~BSolver()
{
}


/*static*/ status_t
BSolver::Create(BSolver*& _solver)
{
        pthread_once(&sLoadLibsolvSolverAddOnInitOnce, &load_libsolv_solver_add_on);
        if (sCreateSolver == NULL)
                return B_NOT_SUPPORTED;

        BSolver* solver = sCreateSolver();
        if (solver == NULL)
                return B_NO_MEMORY;

        status_t error = solver->Init();
        if (error != B_OK) {
                delete solver;
                return error;
        }

        _solver = solver;
        return B_OK;
}


}       // namespace BPackageKit