Diff: TARGET_MCU_NRF51822/sdk/source/ble/peer_manager/peer_id.c

Revision:

638:c90ae1400bf2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_MCU_NRF51822/sdk/source/ble/peer_manager/peer_id.c	Wed Sep 14 14:39:43 2016 +0100
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) Nordic Semiconductor ASA
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ *   3. Neither the name of Nordic Semiconductor ASA nor the names of other
+ *   contributors to this software may be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#include "peer_id.h"
+
+#include <stdint.h>
+#include <string.h>
+#include "sdk_errors.h"
+#include "peer_manager_types.h"
+#include "pm_mutex.h"
+
+
+typedef struct
+{
+    uint8_t peer_ids[MUTEX_STORAGE_SIZE(PM_PEER_ID_N_AVAILABLE_IDS)]; /*< bitmap. */
+} pi_t;
+
+
+static pi_t m_pi = {.peer_ids = {0}};
+
+
+static void internal_state_reset(pi_t * p_pi)
+{
+    memset(p_pi, 0, sizeof(pi_t));
+}
+
+
+void peer_id_init(void)
+{
+    internal_state_reset(&m_pi);
+    pm_mutex_init(m_pi.peer_ids, PM_PEER_ID_N_AVAILABLE_IDS);
+}
+
+
+pm_peer_id_t peer_id_allocate(pm_peer_id_t peer_id)
+{
+    pm_peer_id_t allocated_peer_id = PM_PEER_ID_INVALID;
+    if (peer_id == PM_PEER_ID_INVALID)
+    {
+        allocated_peer_id = pm_mutex_lock_first_available(m_pi.peer_ids, PM_PEER_ID_N_AVAILABLE_IDS);
+        if (allocated_peer_id == PM_PEER_ID_N_AVAILABLE_IDS)
+        {
+            allocated_peer_id = PM_PEER_ID_INVALID;
+        }
+    }
+    else if (peer_id < PM_PEER_ID_N_AVAILABLE_IDS)
+    {
+        bool lock_success = pm_mutex_lock(m_pi.peer_ids, peer_id);
+        allocated_peer_id = lock_success ? peer_id : PM_PEER_ID_INVALID;
+    }
+    return allocated_peer_id;
+}
+
+
+void peer_id_free(pm_peer_id_t peer_id)
+{
+    if (peer_id < PM_PEER_ID_N_AVAILABLE_IDS)
+    {
+        pm_mutex_unlock(m_pi.peer_ids, peer_id);
+    }
+}
+
+
+bool peer_id_is_allocated(pm_peer_id_t peer_id)
+{
+    if (peer_id < PM_PEER_ID_N_AVAILABLE_IDS)
+    {
+        return pm_mutex_lock_status_get(m_pi.peer_ids, peer_id);
+    }
+    return false;
+}
+
+
+pm_peer_id_t peer_id_next_id_get(pm_peer_id_t prev_peer_id)
+{
+    pm_peer_id_t i = (prev_peer_id == PM_PEER_ID_INVALID) ? 0 : (prev_peer_id + 1);
+    for (; i < PM_PEER_ID_N_AVAILABLE_IDS; i++)
+    {
+        if (pm_mutex_lock_status_get(m_pi.peer_ids, i))
+        {
+            return i;
+        }
+    }
+
+    return PM_PEER_ID_INVALID;
+}
+
+
+uint32_t peer_id_n_ids(void)
+{
+    uint32_t n_ids = 0;
+
+    for (pm_peer_id_t i = 0; i < PM_PEER_ID_N_AVAILABLE_IDS; i++)
+    {
+        n_ids += pm_mutex_lock_status_get(m_pi.peer_ids, i);
+    }
+
+    return n_ids;
+}
+
+