\param env the environment to query.
\returns a NULL terminated array of pointers to environment variables in
the form "variable=value" or NULL on failure; call SDL_GetError()
for more information. This is a single allocation that should be
freed with SDL_free() when it is no longer needed.
\threadsafety It is safe to call this function from any thread.
\since This function is available since SDL 3.2.0.
Get all variables in the environment.
\param env the environment to query. \returns a NULL terminated array of pointers to environment variables in the form "variable=value" or NULL on failure; call SDL_GetError() for more information. This is a single allocation that should be freed with SDL_free() when it is no longer needed.
\threadsafety It is safe to call this function from any thread.
\since This function is available since SDL 3.2.0.
\sa SDL_GetEnvironment \sa SDL_CreateEnvironment \sa SDL_GetEnvironmentVariables \sa SDL_SetEnvironmentVariable \sa SDL_UnsetEnvironmentVariable