/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2006 The Regents of the University of California.
 *                         All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */

#ifndef OPAL_MCA_BACKTRACE_BACKTRACE_H
#define OPAL_MCA_BACKTRACE_BACKTRACE_H

#include "opal_config.h"

#include "opal/mca/mca.h"
#include "opal/mca/base/base.h"

BEGIN_C_DECLS

/*
 * Most of this file is just for ompi_info.  There are two interface
 * functions, both of which are called directly.  The joy of link-time
 * components.
 */


/*
 * print back trace to FILE file
 *
 * \note some attempts made to be signal safe.
 */
OPAL_DECLSPEC void opal_backtrace_print(FILE *file);

/*
 * Return back trace in buffer.  buffer will be allocated by the
 * backtrace component, but should be free'ed by the caller.
 *
 * \note Probably bad to call this from a signal handler.
 *
 */
OPAL_DECLSPEC int opal_backtrace_buffer(char*** messages, int *len);


/**
 * Structure for backtrace components.
 */
struct opal_backtrace_base_component_2_0_0_t {
    /** MCA base component */
    mca_base_component_t backtracec_version;
    /** MCA base data */
    mca_base_component_data_t backtracec_data;
};
/**
 * Convenience typedef
 */
typedef struct opal_backtrace_base_component_2_0_0_t opal_backtrace_base_component_2_0_0_t;

/*
 * Macro for use in components that are of type backtrace
 */
#define OPAL_BACKTRACE_BASE_VERSION_2_0_0 \
    MCA_BASE_VERSION_2_0_0, \
    "backtrace", 2, 0, 0

END_C_DECLS

#endif /* OPAL_MCA_BACKTRACE_BACKTRACE_H */