libc-bottom-half/headers/public/wasi/libc-environ.h

   1 #ifndef __wasi_libc_environ_h
   2 #define __wasi_libc_environ_h
   3
   4 /// This header file is a WASI-libc-specific interface, and is not needed by
   5 /// most programs. Most programs should just use the standard `getenv` and
   6 /// related APIs, which take care of all of the details automatically.
   7
   8 #ifdef __cplusplus
   9 extern "C" {
  10 #endif
  11
  12 /// Initialize the global environment variable state. Only needs to be
  13 /// called once; most users should call `__wasilibc_ensure_environ` instead.
  14 void __wasilibc_initialize_environ(void);
  15
  16 /// If `__wasilibc_initialize_environ` has not yet been called, call it.
  17 void __wasilibc_ensure_environ(void);
  18
  19 /// De-initialize the global environment variable state, so that subsequent
  20 /// calls to `__wasilibc_ensure_environ` call `__wasilibc_initialize_environ`.
  21 void __wasilibc_deinitialize_environ(void);
  22
  23 /// Call `__wasilibc_initialize_environ` only if `environ` and `_environ` are
  24 /// referenced in the program.
  25 void __wasilibc_maybe_reinitialize_environ_eagerly(void);
  26
  27 /// Return the value of the `environ` variable. Using `environ` directly
  28 /// requires eager initialization of the environment variables. Using this
  29 /// function instead of `environ` allows initialization to happen lazily.
  30 char **__wasilibc_get_environ(void);
  31
  32 #ifdef __cplusplus
  33 }
  34 #endif
  35
  36 #endif