Merge "Add a mutex to guard all btsnoop operations"

#define LOG_TAG "bt_snoop"

#include <mutex>

#include <arpa/inet.h>

#include <errno.h>

#include <fcntl.h>

static bool module_started;

static bool is_logging;

static bool logging_enabled_via_api;

static std::mutex btsnoop_mutex;

// TODO(zachoverflow): merge btsnoop and btsnoop_net together

void btsnoop_net_open();

static void capture(const BT_HDR* buffer, bool is_received) {

  uint8_t* p = const_cast<uint8_t*>(buffer->data + buffer->offset);

  std::lock_guard<std::mutex> lock(btsnoop_mutex);

  uint64_t timestamp_us = time_gettimeofday_us();

  btsnoop_mem_capture(buffer, timestamp_us);

// Internal functions

static void update_logging() {

  std::lock_guard<std::mutex> lock(btsnoop_mutex);

  bool should_log = module_started && (logging_enabled_via_api ||

                                       stack_config->get_btsnoop_turned_on());