/**
* @file			o3000_portable.h
* @brief		O-3000 definitions to make portable platform-independent code
* @author		Patrick Roth - roth@stettbacher.ch
* @author		Christian Jaeggi - jaeggi@stettbacher.ch
* @version		1.0
* @date			2016-03-01
* @copyright	2012-2016 Stettbacher Signal Processing AG
* 
* @remarks
*
* <PRE>
* 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 library 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
* Lesser 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* </PRE>
*
*/


#ifndef _O3000_PORTABLE_H
#define _O3000_PORTABLE_H


/* stdint.h is not available on older MSVC */
#if defined(_MSC_VER) && (_MSC_VER < 1600) && (!defined(_STDINT)) && (!defined(_STDINT_H))

typedef unsigned __int8   uint8_t;
typedef unsigned __int16  uint16_t;
typedef unsigned __int32  uint32_t;
typedef unsigned __int64  uint64_t;

#else

#include <stdint.h>

#endif // defined(_MSC_VER) && (_MSC_VER < 1600) && (!defined(_STDINT)) && (!defined(_STDINT_H))



/*
 * Calling conventions
 * The System V ABI is one of the major ABIs in use today and is virtually universal among Unix
 * systems. It is the calling convention used by toolchains such as i686-elf-gcc and x86_64-elf-gcc. 
 * 
 * Windows builds often use "project files" and are less transparent and more ad hoc than Makefiles.
 * As an example, the driver crashes by calling a callback previously register via .NET. Therfore 
 * on MSVC, the calling ABI is defined. On other system (UNIX), the macros below are left
 * empty.
 * 
 * _WIN32 is always defined for Win32 or Win64 applications.
 */
#ifndef _WIN32

#define __cdecl    	/* nothing */
#define __stdcall  	/* nothing */
#define __fastcall 	/* nothing */

#else

#include <windows.h>

#endif // _WIN32


/*
 * aligned malloc functiions
 */
#ifndef _WIN32

#define ALIGNED_ALLOC(align, size)	aligned_alloc(align, size)
#define ALIGNED_FREE(buf)			free(buf)

#else

#include <malloc.h>
#define ALIGNED_ALLOC(align, size)	_aligned_malloc(size, align)
#define ALIGNED_FREE(buf)			_aligned_free(buf)

#endif // _WIN32


/*
 * structure packing macros
 */
#if defined(_MSC_VER)

#define __func__					__FUNCTION__
#define __o3000_packed__					__packed

#elif defined(__APPLE__)

#define __o3000_packed__					__attribute__ ((__packed__))

#else

/* define nothing for __func__ because it's used as default macro at source code */
#define __o3000_packed__ 					__attribute__ ((packed))

#endif // defined(_MSC_VER)


/*
 * mutexes
 * 
 * copied from libusb project see files os/threads_windows.* and os/threads_poxix.*
 */
#if defined(_MSC_VER)

#define O3000_MUTEX_INITIALIZER		0L
typedef LONG						o3000_mutex_static_t;
static inline void o3000_mutex_static_lock(o3000_mutex_static_t *mutex) {
	while (InterlockedExchange(mutex, 1L) == 1L)
		SleepEx(0, TRUE);
}
static inline void o3000_mutex_static_unlock(o3000_mutex_static_t *mutex) {
	InterlockedExchange(mutex, 0L);
}

#else

#include <pthread.h>

#define O3000_MUTEX_INITIALIZER		PTHREAD_MUTEX_INITIALIZER
typedef pthread_mutex_t				o3000_mutex_static_t;
static inline void o3000_mutex_static_lock(o3000_mutex_static_t *mutex) {
	(void)pthread_mutex_lock(mutex);
}
static inline void o3000_mutex_static_unlock(o3000_mutex_static_t *mutex) {
	(void)pthread_mutex_unlock(mutex);
}

#endif // defined(_MSC_VER)


#endif // _O3000_PORTABLE_H