liblttng-ust/getenv.h

   1 /*
   2  * SPDX-License-Identifier: LGPL-2.1-only
   3  *
   4  * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  */
   6
   7 #ifndef _COMPAT_GETENV_H
   8 #define _COMPAT_GETENV_H
   9
  10 /*
  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)
  17  */
  18
  19 char *lttng_ust_getenv(const char *name)
  20         __attribute__((visibility("hidden")));
  21
  22 void lttng_ust_getenv_init(void)
  23         __attribute__((visibility("hidden")));
  24
  25 #endif /* _COMPAT_GETENV_H */