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b007c744a4
A GCC bug[1] can, in some cases, pop up an unsuppressible pedwarn when using a static inline standard library function from a non-static inline function. This normally doesn't show up, but can occur if you're running an upgrade version of GCC (such as GCC 4.8 on OS X, which normally runs GCC 4.2). [1]: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47816 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@388046 65c4cc65-6c06-0410-ace0-fbb531ad65f3
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Kevin P. Fleming <kpfleming@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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#ifndef __ASTERISK_INLINEAPI_H
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#define __ASTERISK_INLINEAPI_H
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/*! \file
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* \brief Inlinable API function macro
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Small API functions that are candidates for inlining need to be specially
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declared and defined, to ensure that the 'right thing' always happens.
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For example:
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- there must _always_ be a non-inlined version of the function
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available for modules compiled out of the tree to link to
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- references to a function that cannot be inlined (for any
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reason that the compiler deems proper) must devolve into an
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'extern' reference, instead of 'static', so that multiple
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copies of the function body are not built in different modules
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- when LOW_MEMORY is defined, inlining should be disabled
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completely, even if the compiler is configured to support it
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The AST_INLINE_API macro allows this to happen automatically, when
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used to define your function. Proper usage is as follows:
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- define your function one place, in a header file, using the macro
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to wrap the function (see strings.h or time.h for examples)
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- choose a module to 'host' the function body for non-inline
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usages, and in that module _only_, define AST_API_MODULE before
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including the header file
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*/
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#if !defined(LOW_MEMORY) && !defined(DISABLE_INLINE)
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#if !defined(AST_API_MODULE)
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#define AST_INLINE_API(hdr, body) hdr; extern inline hdr body
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#else
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#define AST_INLINE_API(hdr, body) hdr; hdr body
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#endif
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#else /* defined(LOW_MEMORY) */
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#if !defined(AST_API_MODULE)
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#define AST_INLINE_API(hdr, body) hdr;
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#else
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#define AST_INLINE_API(hdr, body) hdr; hdr body
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#endif
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#endif
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#undef AST_API_MODULE
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#endif /* __ASTERISK_INLINEAPI_H */
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