Refine _bleio

This PR refines the _bleio API. It was originally motivated by
the addition of a new CircuitPython service that enables reading
and modifying files on the device. Moving the BLE lifecycle outside
of the VM motivated a number of changes to remove heap allocations
in some APIs.

It also motivated unifying connection initiation to the Adapter class
rather than the Central and Peripheral classes which have been removed.
Adapter now handles the GAP portion of BLE including advertising, which
has moved but is largely unchanged, and scanning, which has been enhanced
to return an iterator of filtered results.

Once a connection is created (either by us (aka Central) or a remote
device (aka Peripheral)) it is represented by a new Connection class.
This class knows the current connection state and can discover and
instantiate remote Services along with their Characteristics and
Descriptors.

Relates to #586

1 files changed, 27 insertions, 3 deletions

diff --git a/shared-bindings/_bleio/Address.c b/shared-bindings/_bleio/Address.c
index cdee02b5d..c31eb604b 100644
--- a/shared-bindings/_bleio/Address.c
+++ b/shared-bindings/_bleio/Address.c
@@ -114,10 +114,11 @@ const mp_obj_property_t bleio_address_address_bytes_obj = {
 };
 
 //|   .. attribute:: type
-//|
+//|     
 //|     The address type (read-only).
-//|       One of the integer values: `PUBLIC`, `RANDOM_STATIC`,
-//|       `RANDOM_PRIVATE_RESOLVABLE`, or `RANDOM_PRIVATE_NON_RESOLVABLE`.
+//|
+//|     One of the integer values: `PUBLIC`, `RANDOM_STATIC`, `RANDOM_PRIVATE_RESOLVABLE`,
+//|     or `RANDOM_PRIVATE_NON_RESOLVABLE`.
 //|
 STATIC mp_obj_t bleio_address_get_type(mp_obj_t self_in) {
     bleio_address_obj_t *self = MP_OBJ_TO_PTR(self_in);
@@ -159,6 +160,28 @@ STATIC mp_obj_t bleio_address_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_o
     }
 }
 
+//|   .. method:: __hash__()
+//|
+//|     Returns a hash for the Address data.
+//|
+STATIC mp_obj_t bleio_address_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
+    switch (op) {
+        // Two Addresses are equal if their address bytes and address_type are equal
+        case MP_UNARY_OP_HASH: {
+            mp_obj_t bytes = common_hal_bleio_address_get_address_bytes(MP_OBJ_TO_PTR(self_in));
+            GET_STR_HASH(bytes, h);
+            if (h == 0) {
+                GET_STR_DATA_LEN(bytes, data, len);
+                h = qstr_compute_hash(data, len);
+            }
+            h ^= common_hal_bleio_address_get_type(MP_OBJ_TO_PTR(self_in));
+            return MP_OBJ_NEW_SMALL_INT(h);
+        }
+        default:
+            return MP_OBJ_NULL; // op not supported
+    }
+}
+
 STATIC void bleio_address_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
     bleio_address_obj_t *self = MP_OBJ_TO_PTR(self_in);
     mp_buffer_info_t buf_info;
@@ -205,6 +228,7 @@ const mp_obj_type_t bleio_address_type = {
     .name = MP_QSTR_Address,
     .make_new = bleio_address_make_new,
     .print = bleio_address_print,
+    .unary_op = bleio_address_unary_op,
     .binary_op = bleio_address_binary_op,
     .locals_dict = (mp_obj_dict_t*)&bleio_address_locals_dict
 };