common.hpp

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/*
 * Copyright 2016-2018, Intel Corporation
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 *     * Neither the name of the copyright holder nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef LIBPMEMOBJ_CPP_COMMON_HPP
#define LIBPMEMOBJ_CPP_COMMON_HPP
 
#include <libpmemobj++/detail/pexceptions.hpp>
#include <libpmemobj/tx_base.h>
#include <typeinfo>
 
#if defined(__GNUC__) || defined(__clang__)
#define POBJ_CPP_DEPRECATED __attribute__((deprecated))
#elif defined(_MSC_VER)
#define POBJ_CPP_DEPRECATED __declspec(deprecated)
#else
#define POBJ_CPP_DEPRECATED
#endif
 
namespace pmem
{
 
namespace obj
{
template <typename T>
class persistent_ptr;
}
 
namespace detail
{
 
/*
 * Conditionally add 'count' objects to a transaction.
 *
 * Adds count objects starting from `that` to the transaction if '*that' is
 * within a pmemobj pool and there is an active transaction.
 * Does nothing otherwise.
 *
 * @param[in] that pointer to the first object being added to the transaction.
 * @param[in] count number of elements to be added to the transaction.
 */
template <typename T>
inline void
conditional_add_to_tx(const T *that, std::size_t count = 1)
{
    if (count == 0)
        return;
 
    if (pmemobj_tx_stage() != TX_STAGE_WORK)
        return;
 
    /* 'that' is not in any open pool */
    if (!pmemobj_pool_by_ptr(that))
        return;
 
    if (pmemobj_tx_add_range_direct(that, sizeof(*that) * count))
        throw transaction_error("Could not add object(s) to the"
                    " transaction.");
}
 
/*
 * Return type number for given type.
 */
template <typename T>
uint64_t
type_num()
{
    return typeid(T).hash_code();
}
 
} /* namespace detail */
 
} /* namespace pmem */
 
#endif /* LIBPMEMOBJ_CPP_COMMON_HPP */