[lttng-ust.git] / liblttng-ust / getenv.h

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _COMPAT_GETENV_H
#define _COMPAT_GETENV_H

/*
 * Always add the lttng-ust environment variables using the lttng_ust_getenv()
 * infrastructure rather than using getenv() directly.  This ensures that we
 * don't trigger races between getenv() invoked by lttng-ust listener threads
 * invoked concurrently with setenv() called by an otherwise single-threaded
 * application thread. (the application is not aware that it runs with
 * lttng-ust)
 */

char *lttng_ust_getenv(const char *name)
	__attribute__((visibility("hidden")));

void lttng_ust_getenv_init(void)
	__attribute__((visibility("hidden")));

#endif /* _COMPAT_GETENV_H */
Commit	Line	Data
730bf2af	1	/*
c0c0989a	2	* SPDX-License-Identifier: LGPL-2.1-only
730bf2af	3	*
c0c0989a	4	* Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
730bf2af MD	5	*/
730bf2af MD	6
c0c0989a MJ	7	#ifndef _COMPAT_GETENV_H
	8	#define _COMPAT_GETENV_H
	9
6f626d28	10	/*
4c41b460 MJ	11	* Always add the lttng-ust environment variables using the lttng_ust_getenv()
	12	* infrastructure rather than using getenv() directly. This ensures that we
	13	* don't trigger races between getenv() invoked by lttng-ust listener threads
	14	* invoked concurrently with setenv() called by an otherwise single-threaded
	15	* application thread. (the application is not aware that it runs with
	16	* lttng-ust)
6f626d28	17	*/
730bf2af	18
1d18d519 MJ	19	char lttng_ust_getenv(const char name)
1d18d519 MJ	20	__attribute__((visibility("hidden")));
730bf2af	21
1d18d519 MJ	22	void lttng_ust_getenv_init(void)
1d18d519 MJ	23	__attribute__((visibility("hidden")));
730bf2af MD	24
730bf2af MD	25	#endif /* _COMPAT_GETENV_H */