Memory Handling Functions (GNU MPFR 4.2.1)
Description: How to install and use GNU MPFR, a library for reliable multiple precision floating-point arithmetic, version 4.2.1.

### 5.14 Memory Handling Functions

These are general functions concerning memory handling (see Memory Handling, for more information).

Function: `void` mpfr_free_cache `(void)` ¶

  Free all caches and pools used by MPFR internally (those local to the current thread and those shared by all threads). You should call this function before terminating a thread, even if you did not call `mpfr_const_*` functions directly (they could have been called internally).

Function: `void` mpfr_free_cache2 `(mpfr_free_cache_t way)` ¶

  Free various caches and pools used by MPFR internally, as specified by way, which is a set of flags:

  - those local to the current thread if flag `MPFR_FREE_LOCAL_CACHE` is set;
  - those shared by all threads if flag `MPFR_FREE_GLOBAL_CACHE` is set.

  The other bits of way are currently ignored and are reserved for future use; they should be zero.

  Note: `mpfr_free_cache2 (MPFR_FREE_LOCAL_CACHE | MPFR_FREE_GLOBAL_CACHE)` is currently equivalent to `mpfr_free_cache()`.

Function: `void` mpfr_free_pool `(void)` ¶

  Free the pools used by MPFR internally. Note: This function is automatically called after the thread-local caches are freed (with `mpfr_free_cache` or `mpfr_free_cache2`).

Function: `int` mpfr_mp_memory_cleanup `(void)` ¶

  This function should be called before calling `mp_set_memory_functions`. See Memory Handling, for more information. Zero is returned in case of success, non-zero in case of error. Errors are currently not possible, but checking the return value is recommended for future compatibility.