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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

/*
	Random portability stuff
*/

#ifndef PORTING_HEADER
#define PORTING_HEADER

#include <string>
#include "irrlichttypes.h" // u32
#include "debug.h"
#include "constants.h"

#ifdef _MSC_VER
	#define SWPRINTF_CHARSTRING L"%S"
#else
	#define SWPRINTF_CHARSTRING L"%s"
#endif

//currently not needed
//template<typename T> struct alignment_trick { char c; T member; };
//#define ALIGNOF(type) offsetof (alignment_trick<type>, member)

#ifdef _WIN32
	#ifndef _WIN32_WINNT
		#define _WIN32_WINNT 0x0500
	#endif
	#include <windows.h>
	
	#define sleep_ms(x) Sleep(x)
#else
	#include <unistd.h>
	#include <stdint.h> //for uintptr_t
	
	#if (defined(linux) || defined(__linux)) && !defined(_GNU_SOURCE)
		#define _GNU_SOURCE
	#endif

	#include <sched.h>

	#ifdef __FreeBSD__
		#include <pthread_np.h>
		typedef cpuset_t cpu_set_t;
	#elif defined(__sun) || defined(sun)
		#include <sys/types.h>
		#include <sys/processor.h>
	#elif defined(_AIX)
		#include <sys/processor.h>
	#elif __APPLE__
		#include <mach/mach_init.h>
		#include <mach/thread_policy.h>
	#endif

	#define sleep_ms(x) usleep(x*1000)
	
	#define THREAD_PRIORITY_LOWEST       0
	#define THREAD_PRIORITY_BELOW_NORMAL 1
	#define THREAD_PRIORITY_NORMAL       2
	#define THREAD_PRIORITY_ABOVE_NORMAL 3
	#define THREAD_PRIORITY_HIGHEST      4
#endif

#ifdef _MSC_VER
	#define ALIGNOF(x) __alignof(x)
	#define strtok_r(x, y, z) strtok_s(x, y, z)
	#define strtof(x, y) (float)strtod(x, y)
	#define strtoll(x, y, z) _strtoi64(x, y, z)
	#define strtoull(x, y, z) _strtoui64(x, y, z)
	#define strcasecmp(x, y) stricmp(x, y)
#else
	#define ALIGNOF(x) __alignof__(x)
#endif

#ifdef __MINGW32__
	#define strtok_r(x, y, z) mystrtok_r(x, y, z)
#endif

#define PADDING(x, y) ((ALIGNOF(y) - ((uintptr_t)(x) & (ALIGNOF(y) - 1))) & (ALIGNOF(y) - 1))

namespace porting
{

/*
	Signal handler (grabs Ctrl-C on POSIX systems)
*/

void signal_handler_init(void);
// Returns a pointer to a bool.
// When the bool is true, program should quit.
bool * signal_handler_killstatus(void);

/*
	Path of static data directory.
*/
extern std::string path_share;

/*
	Directory for storing user data. Examples:
	Windows: "C:\Documents and Settings\user\Application Data\<PROJECT_NAME>"
	Linux: "~/.<PROJECT_NAME>"
	Mac: "~/Library/Application Support/<PROJECT_NAME>"
*/
extern std::string path_user;

/*
	Get full path of stuff in data directory.
	Example: "stone.png" -> "../data/stone.png"
*/
std::string getDataPath(const char *subpath);

/*
	Initialize path_share and path_user.
*/
void initializePaths();

/*
	Get number of online processors in the system.
*/
int getNumberOfProcessors();

/*