liblttng-ust/getenv.h

   1 #ifndef _COMPAT_GETENV_H
   2 #define _COMPAT_GETENV_H
   3
   4 /*
   5  * Copyright (C) 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; only
  10  * version 2.1 of the License.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /*
  23  * Always add the lttng-ust environment variables to lttng_getenv()
  24  * infrastructure rather than using getenv() directly from lttng-ust.
  25  * This ensures that we don't trigger races between getenv() invoked by
  26  * lttng-ust listener threads invoked concurrently with setenv() called
  27  * by an otherwise single-threaded application thread. (the application
  28  * is not aware that it runs with lttng-ust)
  29  */
  30
  31 char *lttng_getenv(const char *name);
  32
  33 void lttng_ust_getenv_init(void);
  34
  35 #endif /* _COMPAT_GETENV_H */