#ifndef _LTTNG_UST_TID_H
#define _LTTNG_UST_TID_H

/*
 * lttng/ust-tid.h
 *
 * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * gettid compatibility layer.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifdef __linux__
#include <syscall.h>
#endif

#if defined(_syscall0)
_syscall0(pid_t, gettid)
#elif defined(__NR_gettid)
#include <unistd.h>
static inline pid_t gettid(void)
{
	return syscall(__NR_gettid);
}
#else
#include <sys/types.h>
#include <unistd.h>

/* Fall-back on getpid for tid if not available. */
static inline pid_t gettid(void)
{
	return getpid();
}
#endif

#endif /* _LTTNG_UST_TID_H */