apr_support.h

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/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#ifndef APR_SUPPORT_H
#define APR_SUPPORT_H

/**
 * @file apr_support.h
 * @brief APR Support functions
 */

#include "apr.h"
#include "apr_network_io.h"
#include "apr_file_io.h"
#include "apr_private.h"

#if HAVE_VALGRIND
#include <valgrind.h>
#include <memcheck.h>

extern int apr_running_on_valgrind;

#define APR_IF_VALGRIND(x)                                      \
    do { if (apr_running_on_valgrind) { x; } } while (0)

#else
#define APR_IF_VALGRIND(x)
#endif /* HAVE_VALGRIND */

#define APR_VALGRIND_NOACCESS(addr_, size_)                     \
    APR_IF_VALGRIND(VALGRIND_MAKE_MEM_NOACCESS(addr_, size_))
#define APR_VALGRIND_UNDEFINED(addr_, size_)                    \
    APR_IF_VALGRIND(VALGRIND_MAKE_MEM_UNDEFINED(addr_, size_))


#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/**
 * @defgroup apr_support Internal APR support functions
 * @ingroup APR 
 * @{
 */

/**
 * Wait for IO to occur or timeout.
 *
 * @param f The file to wait on.
 * @param s The socket to wait on if @a f is @c NULL.
 * @param for_read If non-zero wait for data to be available to read,
 *        otherwise wait for data to be able to be written. 
 * @return APR_TIMEUP if we run out of time.
 */
apr_status_t apr_wait_for_io_or_timeout(apr_file_t *f, apr_socket_t *s,
                                        int for_read);

/** @} */

#ifdef __cplusplus
}
#endif

#endif  /* ! APR_SUPPORT_H */