[lttng-tools.git] / src / common / readwrite.h

#ifndef LTTNG_COMMON_READWRITE_H
#define LTTNG_COMMON_READWRITE_H

/*
 * Copyright (C) 2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License, version 2.1 only,
 * as published by the Free Software Foundation.
 *
 * 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
 */

#include <unistd.h>
#include <common/macros.h>

/*
 * lttng_read and lttng_write take care of EINTR and partial read/write.
 * Upon success, they return the "count" received as parameter.
 * They can return a negative value if an error occurs.
 * If a value lower than the requested "count" is returned, it means an
 * error occurred.
 * The error can be checked by querying errno.
 */
LTTNG_HIDDEN
ssize_t lttng_read(int fd, void *buf, size_t count);
LTTNG_HIDDEN
ssize_t lttng_write(int fd, const void *buf, size_t count);

#endif /* LTTNG_COMMON_READWRITE_H */
Commit	Line	Data
	1	#ifndef LTTNG_COMMON_READWRITE_H
	2	#define LTTNG_COMMON_READWRITE_H
	3
	4	/*
	5	* Copyright (C) 2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	6	*
	7	* This library is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU Lesser General Public License, version 2.1 only,
	9	* as published by the Free Software Foundation.
	10	*
	11	* This library is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
	14	* for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public License
	17	* along with this library; if not, write to the Free Software Foundation,
	18	* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include <unistd.h>
	22	#include <common/macros.h>
	23
	24	/*
	25	* lttng_read and lttng_write take care of EINTR and partial read/write.
	26	* Upon success, they return the "count" received as parameter.
	27	* They can return a negative value if an error occurs.
	28	* If a value lower than the requested "count" is returned, it means an
	29	* error occurred.
	30	* The error can be checked by querying errno.
	31	*/
	32	LTTNG_HIDDEN
	33	ssize_t lttng_read(int fd, void *buf, size_t count);
	34	LTTNG_HIDDEN
	35	ssize_t lttng_write(int fd, const void *buf, size_t count);
	36
	37	#endif /* LTTNG_COMMON_READWRITE_H */