e81c070ef0
Embedding libltdl without the use of Libtool bootstrapping has proven... difficult. Instead, create a new simple "dl" framework. It only provides 4 functions: - open a DSO (very similar to lt_dlopenadvise()) - lookup a symbol in a previously-opened DSO (very similar to lt_dlsym()) - close a previously-opened DSO (very similar to lt_dlclose()) - iterate over all files in a directory (very similar to ld_dlforeachfile()) There will be follow-on commits with a simple dlopen-based component (nowhere near as complete/functional as libltdl, but good enough for Linux and OS X), and a libltdl-based component for all other platforms. The intent is that the dlopen-based component can be built by default in almost all cases. But if libltdl is available, that component will be built. End result: we still get DSO-based functionality by default in (almost?) all cases. Without embedding libltdl. Which is what we want.
107 строки
2.7 KiB
C
107 строки
2.7 KiB
C
/*
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* Copyright (c) 2004-2010 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2015 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#ifndef OPAL_DL_BASE_H
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#define OPAL_DL_BASE_H
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#include "opal_config.h"
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#include "opal/mca/dl/dl.h"
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#include "opal/util/opal_environ.h"
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#include "opal/runtime/opal_cr.h"
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#include "opal/mca/base/base.h"
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BEGIN_C_DECLS
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/**
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* Globals
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*/
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OPAL_DECLSPEC extern mca_base_framework_t opal_dl_base_framework;
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OPAL_DECLSPEC extern opal_dl_base_component_t
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*opal_dl_base_selected_component;
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OPAL_DECLSPEC extern opal_dl_base_module_t *opal_dl;
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/**
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* Initialize the DL MCA framework
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*
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* @retval OPAL_SUCCESS Upon success
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* @retval OPAL_ERROR Upon failures
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*
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* This function is invoked during opal_init();
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*/
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OPAL_DECLSPEC int opal_dl_base_open(mca_base_open_flag_t flags);
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/**
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* Select an available component.
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*
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* @retval OPAL_SUCCESS Upon Success
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* @retval OPAL_NOT_FOUND If no component can be selected
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* @retval OPAL_ERROR Upon other failure
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*
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*/
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OPAL_DECLSPEC int opal_dl_base_select(void);
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/**
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* Finalize the DL MCA framework
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*
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* @retval OPAL_SUCCESS Upon success
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* @retval OPAL_ERROR Upon failures
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*
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* This function is invoked during opal_finalize();
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*/
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OPAL_DECLSPEC int opal_dl_base_close(void);
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/**
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* Open a DSO
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*
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* (see opal_dl_base_module_open_ft_t in opal/mca/dl/dl.h for
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* documentation of this function)
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*/
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OPAL_DECLSPEC int opal_dl_open(const char *fname,
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bool use_ext, bool private_namespace,
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opal_dl_handle_t **handle, char **err_msg);
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/**
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* Lookup a symbol in a DSO
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*
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* (see opal_dl_base_module_lookup_ft_t in opal/mca/dl/dl.h for
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* documentation of this function)
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*/
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OPAL_DECLSPEC int opal_dl_lookup(opal_dl_handle_t *handle,
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const char *symbol,
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void **ptr, char **err_msg);
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/**
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* Close a DSO
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*
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* (see opal_dl_base_module_close_ft_t in opal/mca/dl/dl.h for
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* documentation of this function)
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*/
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OPAL_DECLSPEC int opal_dl_close(opal_dl_handle_t *handle);
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/**
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* Iterate over files in a path
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*
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* (see opal_dl_base_module_foreachfile_ft_t in opal/mca/dl/dl.h for
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* documentation of this function)
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*/
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OPAL_DECLSPEC int opal_dl_foreachfile(const char *search_path,
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int (*cb_func)(const char *filename,
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void *context),
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void *context);
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END_C_DECLS
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#endif /* OPAL_DL_BASE_H */
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