Refactor usage of osi_free() and osi_freebuf()
* Allow to call osi_freebuf(ptr) on NULL pointers. This simplifies
the code: a notable number of "if (foo != NULL)" checks are removed.
* Add new function osi_free_and_reset(p_ptr) that frees the buffer,
and explicitly resets the pointer to NULL.
This prevents unintended usage of free memory.
* Add corresponding function osi_freebuf_and_reset(p_ptr)
* Minor cleanup around usages of osi_free() and osi_freebuf()
Also:
* Removed unused function btif_gattc_cleanup()
* Replaced usage of the following functions with osi_freebuf_and_reset()
- mca_free_buf()
- utl_freebuf()
- btif_hl_free_buf()
* Replaced usage of rc_supported_event_free() with osi_freebuf()
* Replaced usage of btif_hl_get_buf() with osi_getbuf()
* Eliminate some of the osi_get_buf_size() calls
Bug: 22948224
Change-Id: Ife860658b26274da6f228d7353cb0f1531587337
94 files changed