[lttng-tools.git] / src / common / compat / fcntl.hpp

/*
 * Copyright (C) 2011 David Goulet <dgoulet@efficios.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 */

#ifndef _COMPAT_FCNTL_H
#define _COMPAT_FCNTL_H

#include <common/compat/errno.hpp>

#include <fcntl.h>
#include <sys/types.h>

static_assert(sizeof(off_t) == sizeof(int64_t),
	      "Build system is misconfigured, off_t must be 64-bit wide");

#if (defined(__FreeBSD__) || defined(__sun__))
typedef off64_t loff_t;
#endif

#ifdef __linux__
extern int compat_sync_file_range(int fd, off_t offset, off_t nbytes, unsigned int flags);
#define lttng_sync_file_range(fd, offset, nbytes, flags) \
	compat_sync_file_range(fd, offset, nbytes, flags)

#endif /* __linux__ */

#if (defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__))
/*
 * Possible flags under Linux. Simply nullify them and avoid wrapper.
 */
#define SYNC_FILE_RANGE_WAIT_AFTER  0
#define SYNC_FILE_RANGE_WAIT_BEFORE 0
#define SYNC_FILE_RANGE_WRITE	    0

static inline int lttng_sync_file_range(int fd __attribute__((unused)),
					off_t offset __attribute__((unused)),
					off_t nbytes __attribute__((unused)),
					unsigned int flags __attribute__((unused)))
{
	return -ENOSYS;
}
#endif

#if (defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__))
/*
 * Possible flags under Linux. Simply nullify them and avoid wrappers.
 */
#define SPLICE_F_MOVE	  0
#define SPLICE_F_NONBLOCK 0
#define SPLICE_F_MORE	  0
#define SPLICE_F_GIFT	  0

static inline ssize_t splice(int fd_in __attribute__((unused)),
			     loff_t *off_in __attribute__((unused)),
			     int fd_out __attribute__((unused)),
			     loff_t *off_out __attribute__((unused)),
			     size_t len __attribute__((unused)),
			     unsigned int flags __attribute__((unused)))
{
	return -ENOSYS;
}
#endif

#if !(defined(__linux__) || defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__sun__) || \
      defined(__APPLE__))
#error "Please add support for your OS."
#endif /* __linux__ , __FreeBSD__, __CYGWIN__, __sun__, __APPLE__ */

#endif /* _COMPAT_FCNTL_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 David Goulet <dgoulet@efficios.com>
	3	*
	4	* SPDX-License-Identifier: LGPL-2.1-only
	5	*
	6	*/
	7
	8	#ifndef _COMPAT_FCNTL_H
	9	#define _COMPAT_FCNTL_H
	10
	11	#include <common/compat/errno.hpp>
	12
	13	#include <fcntl.h>
	14	#include <sys/types.h>
	15
	16	static_assert(sizeof(off_t) == sizeof(int64_t),
	17	"Build system is misconfigured, off_t must be 64-bit wide");
	18
	19	#if (defined(__FreeBSD__) \|\| defined(__sun__))
	20	typedef off64_t loff_t;
	21	#endif
	22
	23	#ifdef __linux__
	24	extern int compat_sync_file_range(int fd, off_t offset, off_t nbytes, unsigned int flags);
	25	#define lttng_sync_file_range(fd, offset, nbytes, flags) \
	26	compat_sync_file_range(fd, offset, nbytes, flags)
	27
	28	#endif /* __linux__ */
	29
	30	#if (defined(__FreeBSD__) \|\| defined(__CYGWIN__) \|\| defined(__sun__))
	31	/*
	32	* Possible flags under Linux. Simply nullify them and avoid wrapper.
	33	*/
	34	#define SYNC_FILE_RANGE_WAIT_AFTER 0
	35	#define SYNC_FILE_RANGE_WAIT_BEFORE 0
	36	#define SYNC_FILE_RANGE_WRITE 0
	37
	38	static inline int lttng_sync_file_range(int fd __attribute__((unused)),
	39	off_t offset __attribute__((unused)),
	40	off_t nbytes __attribute__((unused)),
	41	unsigned int flags __attribute__((unused)))
	42	{
	43	return -ENOSYS;
	44	}
	45	#endif
	46
	47	#if (defined(__FreeBSD__) \|\| defined(__CYGWIN__) \|\| defined(__sun__))
	48	/*
	49	* Possible flags under Linux. Simply nullify them and avoid wrappers.
	50	*/
	51	#define SPLICE_F_MOVE 0
	52	#define SPLICE_F_NONBLOCK 0
	53	#define SPLICE_F_MORE 0
	54	#define SPLICE_F_GIFT 0
	55
	56	static inline ssize_t splice(int fd_in __attribute__((unused)),
	57	loff_t *off_in __attribute__((unused)),
	58	int fd_out __attribute__((unused)),
	59	loff_t *off_out __attribute__((unused)),
	60	size_t len __attribute__((unused)),
	61	unsigned int flags __attribute__((unused)))
	62	{
	63	return -ENOSYS;
	64	}
	65	#endif
	66
	67	#if !(defined(__linux__) \|\| defined(__FreeBSD__) \|\| defined(__CYGWIN__) \|\| defined(__sun__) \|\| \
	68	defined(__APPLE__))
	69	#error "Please add support for your OS."
	70	#endif /* __linux__ , __FreeBSD__, __CYGWIN__, __sun__, __APPLE__ */
	71
	72	#endif /* _COMPAT_FCNTL_H */