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115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/*
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* cynapses libc functions
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*
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* Copyright (c) 2008-2013 by Andreas Schneider <asn@cryptomilk.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file c_macro.h
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*
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* @brief cynapses libc macro definitions
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*
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* @defgroup cynMacroInternals cynapses libc macro definitions
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* @ingroup cynLibraryAPI
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*
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* @{
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*/
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#ifndef _C_MACRO_H
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#define _C_MACRO_H
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#include <stdint.h>
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#include <string.h>
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#define INT_TO_POINTER(i) (void *) i
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#define POINTER_TO_INT(p) *((int *) (p))
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/** Zero a structure */
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#define ZERO_STRUCT(x) memset((char *)&(x), 0, sizeof(x))
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/** Zero a structure given a pointer to the structure */
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#define ZERO_STRUCTP(x) do { if ((x) != NULL) memset((char *)(x), 0, sizeof(*(x))); } while(0)
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/** Free memory and zero the pointer */
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#define SAFE_FREE(x) do { if ((x) != NULL) {free((void*)x); x=NULL;} } while(0)
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/** Get the smaller value */
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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/** Get the bigger value */
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#define MAX(a,b) ((a) < (b) ? (b) : (a))
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/** Get the size of an array */
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#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
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/** Macro to make strerror_r work with -Werror=unused-result */
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#define C_STRERROR(errno, buf, size) if(strerror_r(errno, buf, size)) {}
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/**
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* This is a hack to fix warnings. The idea is to use this everywhere that we
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* get the "discarding const" warning by the compiler. That doesn't actually
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* fix the real issue, but marks the place and you can search the code for
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* discard_const.
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*
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* Please use this macro only when there is no other way to fix the warning.
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* We should use this function in only in a very few places.
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*
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* Also, please call this via the discard_const_p() macro interface, as that
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* makes the return type safe.
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*/
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#define discard_const(ptr) ((void *)((uintptr_t)(ptr)))
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/**
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* Type-safe version of discard_const
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*/
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#define discard_const_p(type, ptr) ((type *)discard_const(ptr))
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#if (__GNUC__ >= 3)
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# ifndef likely
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# define likely(x) __builtin_expect(!!(x), 1)
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# endif
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# ifndef unlikely
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# define unlikely(x) __builtin_expect(!!(x), 0)
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# endif
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#else /* __GNUC__ */
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# ifndef likely
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# define likely(x) (x)
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# endif
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# ifndef unlikely
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# define unlikely(x) (x)
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# endif
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#endif /* __GNUC__ */
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/**
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* }@
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*/
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#ifdef _WIN32
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/* missing errno codes on mingw */
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#ifndef ENOTBLK
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#define ENOTBLK 15
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#endif
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#ifndef ETXTBSY
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#define ETXTBSY 26
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#endif
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#ifndef ENOBUFS
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#define ENOBUFS WSAENOBUFS
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#endif
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#endif /* _WIN32 */
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#endif /* _C_MACRO_H */
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