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#ifndef __CB_BDK_REQUIRE_H__
#define __CB_BDK_REQUIRE_H__
/***********************license start***********************************
* Copyright (c) 2003-2017 Cavium Inc. (support@cavium.com). All rights
* reserved.
*
*
* 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 Cavium Inc. 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, including technical data, may be subject to U.S. export
* control laws, including the U.S. Export Administration Act and its
* associated regulations, and may be subject to export or import
* regulations in other countries.
*
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT
* TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES
* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR
* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT,
* QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK
* ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* Functions and macros to control what parts of the BDK are linked in
*
* <hr>$Revision: 49448 $<hr>
* @defgroup require Component linking control
* @{
*/
/**
* Optional parts of the BDK code are pulled in by adding
* BDK_REQUIRE() lines to the function bdk_require_depends().
* Component symbols are defined as weak so that they are not
* linked in unless a BDK_REQUIRE() pulls them in.
*/
#define BDK_REQUIRE(component) \
do \
{ \
extern char __bdk_require_symbol_##component; \
bdk_warn_if(__bdk_require_symbol_##component, \
"Require of %s failed\n", #component); \
} while (0)
/**
* The following macro defines a special symbol in a C file to
* define it as a require component. Referencing this symbol
* causes all objects defined in the C file to be pulled in. This
* symbol should only be referenced by using the BDK_REQUIRE()
* macro in the function bdk_require_depends().
*/
#define BDK_REQUIRE_DEFINE(component) \
char __bdk_require_symbol_##component; \
char __bdk_is_required_symbol_##component
/**
* Return if a component has been required. Useful for if
* statements around referencing of weak symbols.
*/
#define BDK_IS_REQUIRED(component) \
({int is_required; \
do \
{ \
extern char __bdk_is_required_symbol_##component __attribute__((weak));\
is_required = (&__bdk_is_required_symbol_##component != NULL); \
} while (0); \
is_required;})
/**
* The require macros use weak symbols to control if components
* are linked in. All directly referenced symbols in a component
* must be defined a weak. This causes the component to only be
* pulled in by the linker if the symbol defined by
* BDK_REQUIRE_DEFINE is used.
*/
#define BDK_WEAK __attribute__((weak))
/**
* This function is not defined by the BDK libraries. It must be
* defined by all BDK applications. It should be empty except for
* containing BDK_REQUIRE() lines. The bdk-init code has a strong
* reference to bdk_requires_depends() which then contains strong
* references to all needed components.
*/
// FIXME(dhendrix): leave it out if possible */
//extern void __bdk_require_depends(void);
/** @} */
#endif
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