/*
- * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * 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 General Public License for
- * more details.
- *
- * You should have received a copy of the GNU 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.
*/
#ifndef LTTNG_PIPE_H
#include <pthread.h>
#include <common/macros.h>
+#include <sys/types.h>
enum lttng_pipe_state {
LTTNG_PIPE_STATE_OPENED = 1,
/*
* Return 1 if read side is open else 0.
*/
-static inline int lttng_pipe_is_read_open(struct lttng_pipe *pipe)
+static inline int lttng_pipe_is_read_open(const struct lttng_pipe *pipe)
{
return pipe->r_state == LTTNG_PIPE_STATE_OPENED ? 1 : 0;
}
/*
* Return 1 if write side is open else 0.
*/
-static inline int lttng_pipe_is_write_open(struct lttng_pipe *pipe)
+static inline int lttng_pipe_is_write_open(const struct lttng_pipe *pipe)
{
return pipe->w_state == LTTNG_PIPE_STATE_OPENED ? 1 : 0;
}
-static inline int lttng_pipe_get_readfd(struct lttng_pipe *pipe)
+static inline int lttng_pipe_get_readfd(const struct lttng_pipe *pipe)
{
return pipe->fd[0];
}
-static inline int lttng_pipe_get_writefd(struct lttng_pipe *pipe)
+static inline int lttng_pipe_get_writefd(const struct lttng_pipe *pipe)
{
return pipe->fd[1];
}
LTTNG_HIDDEN
struct lttng_pipe *lttng_pipe_open(int flags);
LTTNG_HIDDEN
+struct lttng_pipe *lttng_pipe_named_open(const char *path, mode_t mode,
+ int flags);
+LTTNG_HIDDEN
int lttng_pipe_write_close(struct lttng_pipe *pipe);
LTTNG_HIDDEN
int lttng_pipe_read_close(struct lttng_pipe *pipe);
LTTNG_HIDDEN
ssize_t lttng_pipe_write(struct lttng_pipe *pipe, const void *buf,
size_t count);
+/* Returns and releases the read end of the pipe. */
+LTTNG_HIDDEN
+int lttng_pipe_release_readfd(struct lttng_pipe *pipe);
+/* Returns and releases the write end of the pipe. */
+LTTNG_HIDDEN
+int lttng_pipe_release_writefd(struct lttng_pipe *pipe);
#endif /* LTTNG_PIPE_H */