[babeltrace.git] / src / compat / mman.h

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright (C) 2015-2016  Michael Jeanson <mjeanson@efficios.com>
 */

#ifndef _BABELTRACE_COMPAT_MMAN_H
#define _BABELTRACE_COMPAT_MMAN_H

#ifdef __MINGW32__

#include <sys/types.h>
#include "common/macros.h"

#define PROT_NONE	0x0
#define PROT_READ	0x1
#define PROT_WRITE	0x2
#define PROT_EXEC	0x4

#define MAP_FILE	0
#define MAP_SHARED	1
#define MAP_PRIVATE	2
#define MAP_TYPE	0xF
#define MAP_FIXED	0x10
#define MAP_ANONYMOUS	0x20
#define MAP_ANON	MAP_ANONYMOUS
#define MAP_FAILED	((void *) -1)

/*
 * Note that some platforms (e.g. Windows) do not allow read-only
 * mappings to exceed the file's size (even within a page).
 */
BT_EXTERN_C void *bt_mmap(size_t length, int prot, int flags, int fd,
	off_t offset, int log_level);

BT_EXTERN_C int bt_munmap(void *addr, size_t length);

/*
 * On Windows the memory mapping offset must be aligned to the memory
 * allocator allocation granularity and not the page size.
 */
BT_EXTERN_C size_t bt_mmap_get_offset_align_size(int log_level);

#else /* __MINGW32__ */

#include <sys/mman.h>
#include "common/common.h"

static inline
void *bt_mmap(size_t length, int prot, int flags, int fd,
	off_t offset, int log_level __attribute__((unused)))
{
	return (void *) mmap(NULL, length, prot, flags, fd, offset);
}

static inline
int bt_munmap(void *addr, size_t length)
{
	return munmap(addr, length);
}

/*
 * On other platforms the memory mapping offset must be aligned to the
 * page size.
 */
static inline
size_t bt_mmap_get_offset_align_size(int log_level)
{
	return bt_common_get_page_size(log_level);
}
#endif /* __MINGW32__ */

#ifndef MAP_ANONYMOUS
# ifdef MAP_ANON
#   define MAP_ANONYMOUS MAP_ANON
# endif
#endif

#endif /* _BABELTRACE_COMPAT_MMAN_H */
Commit	Line	Data
	1	/*
	2	* SPDX-License-Identifier: MIT
	3	*
	4	* Copyright (C) 2015-2016 Michael Jeanson <mjeanson@efficios.com>
	5	*/
	6
	7	#ifndef _BABELTRACE_COMPAT_MMAN_H
	8	#define _BABELTRACE_COMPAT_MMAN_H
	9
	10	#ifdef __MINGW32__
	11
	12	#include <sys/types.h>
	13	#include "common/macros.h"
	14
	15	#define PROT_NONE 0x0
	16	#define PROT_READ 0x1
	17	#define PROT_WRITE 0x2
	18	#define PROT_EXEC 0x4
	19
	20	#define MAP_FILE 0
	21	#define MAP_SHARED 1
	22	#define MAP_PRIVATE 2
	23	#define MAP_TYPE 0xF
	24	#define MAP_FIXED 0x10
	25	#define MAP_ANONYMOUS 0x20
	26	#define MAP_ANON MAP_ANONYMOUS
	27	#define MAP_FAILED ((void *) -1)
	28
	29	/*
	30	* Note that some platforms (e.g. Windows) do not allow read-only
	31	* mappings to exceed the file's size (even within a page).
	32	*/
	33	BT_EXTERN_C void *bt_mmap(size_t length, int prot, int flags, int fd,
	34	off_t offset, int log_level);
	35
	36	BT_EXTERN_C int bt_munmap(void *addr, size_t length);
	37
	38	/*
	39	* On Windows the memory mapping offset must be aligned to the memory
	40	* allocator allocation granularity and not the page size.
	41	*/
	42	BT_EXTERN_C size_t bt_mmap_get_offset_align_size(int log_level);
	43
	44	#else /* __MINGW32__ */
	45
	46	#include <sys/mman.h>
	47	#include "common/common.h"
	48
	49	static inline
	50	void *bt_mmap(size_t length, int prot, int flags, int fd,
	51	off_t offset, int log_level __attribute__((unused)))
	52	{
	53	return (void *) mmap(NULL, length, prot, flags, fd, offset);
	54	}
	55
	56	static inline
	57	int bt_munmap(void *addr, size_t length)
	58	{
	59	return munmap(addr, length);
	60	}
	61
	62	/*
	63	* On other platforms the memory mapping offset must be aligned to the
	64	* page size.
	65	*/
	66	static inline
	67	size_t bt_mmap_get_offset_align_size(int log_level)
	68	{
	69	return bt_common_get_page_size(log_level);
	70	}
	71	#endif /* __MINGW32__ */
	72
	73	#ifndef MAP_ANONYMOUS
	74	# ifdef MAP_ANON
	75	# define MAP_ANONYMOUS MAP_ANON
	76	# endif
	77	#endif
	78
	79	#endif /* _BABELTRACE_COMPAT_MMAN_H */