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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2010 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/* This file is to a large extent based on gmacros.h from glib
* Which is LGPL and copyright:
*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
#ifndef _H_SPICE_MACROS
#define _H_SPICE_MACROS
/* We include stddef.h to get the system's definition of NULL */
#include <stddef.h>
#include <spice/types.h>
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
#define SPICE_GNUC_MALLOC __attribute__((__malloc__))
#else
#define SPICE_GNUC_MALLOC
#endif
#ifndef __has_feature
#define __has_feature(x) 0 /* Compatibility with non-clang compilers. */
#endif
#if (!defined(__clang__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || \
(defined(__clang__) && __has_feature(__alloc_size__))
#define SPICE_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
#define SPICE_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
#else
#define SPICE_GNUC_ALLOC_SIZE(x)
#define SPICE_GNUC_ALLOC_SIZE2(x,y)
#endif
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
#define SPICE_GNUC_PRINTF( format_idx, arg_idx ) __attribute__((__format__ (__printf__, format_idx, arg_idx)))
#define SPICE_GNUC_NORETURN __attribute__((__noreturn__))
#define SPICE_GNUC_UNUSED __attribute__((__unused__))
#else /* !__GNUC__ */
#define SPICE_GNUC_PRINTF( format_idx, arg_idx )
#define SPICE_GNUC_NORETURN
#define SPICE_GNUC_UNUSED
#endif /* !__GNUC__ */
#ifdef G_DEPRECATED
#define SPICE_GNUC_DEPRECATED G_DEPRECATED
#elif __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
#define SPICE_GNUC_DEPRECATED __attribute__((__deprecated__))
#elif defined(_MSC_VER) && (_MSC_VER >= 1300)
#define SPICE_GNUC_DEPRECATED __declspec(deprecated)
#else
#define SPICE_GNUC_DEPRECATED
#endif
#if ((defined(__GNUC__) && (__GNUC__ > 6 || (__GNUC__ == 6 && __GNUC_MINOR__ >= 1))) || \
(defined(__clang_major__) && (__clang_major__ > 3 || \
(__clang_major__ == 3 && __clang_minor__ >= 0))))
#define SPICE_GNUC_DEPRECATED_ENUMERATOR SPICE_GNUC_DEPRECATED
#else
#define SPICE_GNUC_DEPRECATED_ENUMERATOR
#endif
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
# define SPICE_GNUC_MAY_ALIAS __attribute__((may_alias))
#else
# define SPICE_GNUC_MAY_ALIAS
#endif
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
#define SPICE_GNUC_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#else
#define SPICE_GNUC_WARN_UNUSED_RESULT
#endif /* __GNUC__ */
/* Guard C code in headers, while including them from C++ */
#ifdef __cplusplus
# define SPICE_BEGIN_DECLS extern "C" {
# define SPICE_END_DECLS }
#else
# define SPICE_BEGIN_DECLS
# define SPICE_END_DECLS
#endif
#ifndef FALSE
#define FALSE (0)
#endif
#ifndef TRUE
#define TRUE (!FALSE)
#endif
#undef MAX
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
#undef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#undef ABS
#define ABS(a) (((a) < 0) ? -(a) : (a))
/* Count the number of elements in an array. The array must be defined
* as such; using this with a dynamically allocated array will give
* incorrect results.
*/
#define SPICE_N_ELEMENTS(arr) (sizeof (arr) / sizeof ((arr)[0]))
#define SPICE_ALIGN(a, size) (((a) + ((size) - 1)) & ~((size) - 1))
/* Provide convenience macros for handling structure
* fields through their offsets.
*/
#if defined(__GNUC__) && __GNUC__ >= 4
# define SPICE_OFFSETOF(struct_type, member) \
((long) offsetof (struct_type, member))
#else
# define SPICE_OFFSETOF(struct_type, member) \
((long) ((uint8_t*) &((struct_type*) 0)->member))
#endif
/* The SPICE_USE_SAFER_CONTAINEROF macro is used to avoid
* compilation breakage with older spice-server releases which
* triggered some errors without an additional patch.
*/
#if defined(__GNUC__) && defined(SPICE_USE_SAFER_CONTAINEROF) && \
(__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
#define SPICE_CONTAINEROF(ptr, struct_type, member) ({ \
const typeof( ((struct_type *)0)->member ) *__mptr = (ptr); \
((struct_type *)(void *)((uint8_t *)(__mptr) - SPICE_OFFSETOF(struct_type, member))); })
#else
#define SPICE_CONTAINEROF(ptr, struct_type, member) \
((struct_type *)(void *)((uint8_t *)(ptr) - SPICE_OFFSETOF(struct_type, member)))
#endif
#define SPICE_MEMBER_P(struct_p, struct_offset) \
((gpointer) ((guint8*) (struct_p) + (glong) (struct_offset)))
#define SPICE_MEMBER(member_type, struct_p, struct_offset) \
(*(member_type*) SPICE_STRUCT_MEMBER_P ((struct_p), (struct_offset)))
/* Provide simple macro statement wrappers:
* SPICE_STMT_START { statements; } SPICE_STMT_END;
* This can be used as a single statement, like:
* if (x) SPICE_STMT_START { ... } SPICE_STMT_END; else ...
* This intentionally does not use compiler extensions like GCC's '({...})' to
* avoid portability issue or side effects when compiled with different compilers.
*/
#if !(defined (SPICE_STMT_START) && defined (SPICE_STMT_END))
# define SPICE_STMT_START do
# define SPICE_STMT_END while (0)
#endif
/*
* The SPICE_LIKELY and SPICE_UNLIKELY macros let the programmer give hints to
* the compiler about the expected result of an expression. Some compilers
* can use this information for optimizations.
*
* The _SPICE_BOOLEAN_EXPR macro is intended to trigger a gcc warning when
* putting assignments in g_return_if_fail ().
*/
#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
#define _SPICE_BOOLEAN_EXPR(expr) \
__extension__ ({ \
int _g_boolean_var_; \
if (expr) \
_g_boolean_var_ = 1; \
else \
_g_boolean_var_ = 0; \
_g_boolean_var_; \
})
#define SPICE_LIKELY(expr) (__builtin_expect (_SPICE_BOOLEAN_EXPR(expr), 1))
#define SPICE_UNLIKELY(expr) (__builtin_expect (_SPICE_BOOLEAN_EXPR(expr), 0))
#else
#define SPICE_LIKELY(expr) (expr)
#define SPICE_UNLIKELY(expr) (expr)
#endif
#ifdef _MSC_VER
#define SPICE_UINT64_CONSTANT(x) (x ## UI64)
#define SPICE_INT64_CONSTANT(x) (x ## I64)
#else
#if LONG_MAX == 2147483647L
#define SPICE_UINT64_CONSTANT(x) (x ## ULL)
#define SPICE_INT64_CONSTANT(x) (x ## LL)
#else
#define SPICE_UINT64_CONSTANT(x) (x ## UL)
#define SPICE_INT64_CONSTANT(x) (x ## L)
#endif
#endif
/* Little/Bit endian byte swapping */
#define SPICE_BYTESWAP16_CONSTANT(val) ((uint16_t) ( \
(uint16_t) ((uint16_t) (val) >> 8) | \
(uint16_t) ((uint16_t) (val) << 8)))
#define SPICE_BYTESWAP32_CONSTANT(val) ((uint32_t) ( \
(((uint32_t) (val) & (uint32_t) 0x000000ffU) << 24) | \
(((uint32_t) (val) & (uint32_t) 0x0000ff00U) << 8) | \
(((uint32_t) (val) & (uint32_t) 0x00ff0000U) >> 8) | \
(((uint32_t) (val) & (uint32_t) 0xff000000U) >> 24)))
#define SPICE_BYTESWAP64_CONSTANT(val) ((uint64_t) ( \
(((uint64_t) (val) & \
(uint64_t) SPICE_UINT64_CONSTANT(0x00000000000000ff)) << 56) | \
(((uint64_t) (val) & \
(uint64_t) SPICE_UINT64_CONSTANT(0x000000000000ff00)) << 40) | \
(((uint64_t) (val) & \
(uint64_t) SPICE_UINT64_CONSTANT(0x0000000000ff0000)) << 24) | \
(((uint64_t) (val) & \
(uint64_t) SPICE_UINT64_CONSTANT(0x00000000ff000000)) << 8) | \
(((uint64_t) (val) & \
(uint64_t) SPICE_UINT64_CONSTANT(0x000000ff00000000)) >> 8) | \
(((uint64_t) (val) & \
(uint64_t) SPICE_UINT64_CONSTANT(0x0000ff0000000000)) >> 24) | \
(((uint64_t) (val) & \
(uint64_t) SPICE_UINT64_CONSTANT(0x00ff000000000000)) >> 40) | \
(((uint64_t) (val) & \
(uint64_t) SPICE_UINT64_CONSTANT(0xff00000000000000)) >> 56)))
/* Arch specific stuff for speed
*/
#if defined (__GNUC__) && (__GNUC__ >= 4) && defined (__OPTIMIZE__)
# define SPICE_BYTESWAP16(val) __builtin_bswap16(val)
# define SPICE_BYTESWAP32(val) __builtin_bswap32(val)
# define SPICE_BYTESWAP64(val) __builtin_bswap64(val)
#elif defined(_MSC_VER)
# define SPICE_BYTESWAP16(val) _byteswap_ushort(val)
# define SPICE_BYTESWAP32(val) _byteswap_ulong(val)
# define SPICE_BYTESWAP64(val) _byteswap_uint64(val)
#else /* generic */
# define SPICE_BYTESWAP16(val) (SPICE_BYTESWAP16_CONSTANT (val))
# define SPICE_BYTESWAP32(val) (SPICE_BYTESWAP32_CONSTANT (val))
# define SPICE_BYTESWAP64(val) (SPICE_BYTESWAP64_CONSTANT (val))
#endif /* generic */
/* detect endianness */
#undef SPICE_ENDIAN
#define SPICE_ENDIAN_LITTLE 4321
#define SPICE_ENDIAN_BIG 1234
#define SPICE_ENDIAN_PDP 2143
/* gcc already defined these, use them */
#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) \
&& defined(__ORDER_BIG_ENDIAN__) && defined(__ORDER_PDP_ENDIAN__)
# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
# define SPICE_ENDIAN SPICE_ENDIAN_LITTLE
# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
# define SPICE_ENDIAN SPICE_ENDIAN_BIG
# elif __BYTE_ORDER__ == __ORDER_PDP_ENDIAN__
# define SPICE_ENDIAN SPICE_ENDIAN_PDP
# else
# error __BYTE_ORDER__ not defined correctly
# endif
#endif
/* use suggestions at http://sourceforge.net/p/predef/wiki/Endianness/ */
#ifndef SPICE_ENDIAN
# if defined(__LITTLE_ENDIAN__) || defined(__ARMEL__) \
|| defined(__THUMBEL__) || defined(__AARCH64EL__) \
|| defined(_MIPSEL) || defined(__MIPSEL) || defined(__MIPSEL__) \
|| defined(__amd64__) || defined(__x86_64__) || defined(__i386__) \
|| defined(__e2k__)
# define SPICE_ENDIAN SPICE_ENDIAN_LITTLE
# endif
# if defined(__BIG_ENDIAN__) || defined(__ARMEB__) \
|| defined(__THUMBEB__) || defined(__AARCH64EB__) \
|| defined(_MIPSEB) || defined(__MIPSEB) || defined(__MIPSEB__)
# ifdef SPICE_ENDIAN
# error Both little and big endian detected
# endif
# define SPICE_ENDIAN SPICE_ENDIAN_BIG
# endif
#endif
/* MS compiler */
#if !defined(SPICE_ENDIAN) && defined(_MSC_VER)
/* Windows support only little endian arm */
# if defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) \
|| defined(_M_ARM)
# define SPICE_ENDIAN SPICE_ENDIAN_LITTLE
# endif
#endif
#if !defined(SPICE_ENDIAN)
#error Unable to detect processor endianness
#endif
#if SPICE_ENDIAN == SPICE_ENDIAN_PDP
#error PDP endianness not supported by Spice
#endif
#if SPICE_ENDIAN == SPICE_ENDIAN_LITTLE
#define SPICE_MAGIC_CONST(s) \
((uint32_t)((s[0]&0xffu)|((s[1]&0xffu)<<8)|((s[2]&0xffu)<<16)|((s[3]&0xffu)<<24)))
#else
#define SPICE_MAGIC_CONST(s) \
((uint32_t)((s[3]&0xffu)|((s[2]&0xffu)<<8)|((s[1]&0xffu)<<16)|((s[0]&0xffu)<<24)))
#endif
#endif /* _H_SPICE_MACROS */