Bluetooth: Move common code to common/

Since more and more code is going to be reused by both the Host and the
Controller, this commit introduces a common/ folder that will contain
everything that is not tied to one of the two components but shared by
them.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>

subsys/bluetooth/common/log.h

@@ -0,0 +1,115 @@
+/** @file
+ *  @brief Bluetooth subsystem logging helpers.
+ */
+
+/*
+ * Copyright (c) 2017 Nordic Semiconductor ASA
+ * Copyright (c) 2015-2016 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#ifndef __BT_LOG_H
+#define __BT_LOG_H
+
+#include <sections.h>
+#include <offsets.h>
+#include <zephyr.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/hci.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(BT_DBG_ENABLED)
+#define BT_DBG_ENABLED 1
+#endif
+
+#if defined(CONFIG_BLUETOOTH_DEBUG_MONITOR)
+#include <stdio.h>
+
+/* These defines follow the values used by syslog(2) */
+#define BT_LOG_ERR      3
+#define BT_LOG_WARN     4
+#define BT_LOG_INFO     6
+#define BT_LOG_DBG      7
+
+__printf_like(2, 3) void bt_log(int prio, const char *fmt, ...);
+
+#define BT_DBG(fmt, ...) \
+	if (BT_DBG_ENABLED) { \
+		bt_log(BT_LOG_DBG, "%s (%p): " fmt, \
+		       __func__, k_current_get(), ##__VA_ARGS__); \
+	}
+
+#define BT_ERR(fmt, ...) bt_log(BT_LOG_ERR, "%s: " fmt, \
+				__func__, ##__VA_ARGS__)
+#define BT_WARN(fmt, ...) bt_log(BT_LOG_WARN, "%s: " fmt, \
+				 __func__, ##__VA_ARGS__)
+#define BT_INFO(fmt, ...) bt_log(BT_LOG_INFO, fmt, ##__VA_ARGS__)
+
+/* Enabling debug increases stack size requirement */
+#define BT_STACK_DEBUG_EXTRA	300
+
+#elif defined(CONFIG_BLUETOOTH_DEBUG_LOG)
+
+#define SYS_LOG_DOMAIN "bt"
+#define SYS_LOG_LEVEL SYS_LOG_LEVEL_DEBUG
+#include <logging/sys_log.h>
+
+#define BT_DBG(fmt, ...) \
+	if (BT_DBG_ENABLED) { \
+		SYS_LOG_DBG("(%p) " fmt, k_current_get(), \
+			    ##__VA_ARGS__); \
+	}
+
+#define BT_ERR(fmt, ...) SYS_LOG_ERR(fmt, ##__VA_ARGS__)
+#define BT_WARN(fmt, ...) SYS_LOG_WRN(fmt, ##__VA_ARGS__)
+#define BT_INFO(fmt, ...) SYS_LOG_INF(fmt, ##__VA_ARGS__)
+
+/* Enabling debug increases stack size requirement considerably */
+#define BT_STACK_DEBUG_EXTRA	300
+
+#else
+
+static inline __printf_like(1, 2) void _bt_log_dummy(const char *fmt, ...) {};
+
+#define BT_DBG(fmt, ...) \
+		if (0) { \
+			_bt_log_dummy(fmt, ##__VA_ARGS__); \
+		}
+#define BT_ERR BT_DBG
+#define BT_WARN BT_DBG
+#define BT_INFO BT_DBG
+
+#define BT_STACK_DEBUG_EXTRA	0
+
+#endif
+
+#define BT_ASSERT(cond) if (!(cond)) { \
+				BT_ERR("assert: '" #cond "' failed"); \
+				k_oops(); \
+			}
+
+#define BT_STACK(name, size) \
+		char __stack name[(size) + BT_STACK_DEBUG_EXTRA]
+#define BT_STACK_NOINIT(name, size) \
+		char __noinit __stack name[(size) + BT_STACK_DEBUG_EXTRA]
+
+/* This helper is only available when BLUETOOTH_DEBUG is enabled */
+const char *bt_hex(const void *buf, size_t len);
+
+/* These helpers are only safe to be called from internal threads as they're
+ * not multi-threading safe
+ */
+const char *bt_addr_str(const bt_addr_t *addr);
+const char *bt_addr_le_str(const bt_addr_le_t *addr);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __BT_LOG_H */
+