Merge "Load bluetooth library directly, instead of using hardware module" (bbb0cb06) · Commits · e / os / android_packages_modules_Bluetooth

android/app/jni/com_android_bluetooth_btservice_AdapterService.cpp

+59 −4

Original line number	Diff line number	Diff line
		@@ -22,6 +22,10 @@
		#include "utils/Log.h"
		#include "utils/misc.h"

		#include <base/logging.h>
		#include <base/strings/stringprintf.h>
		#include <dlfcn.h>
		#include <errno.h>
		#include <pthread.h>
		#include <string.h>

		@@ -29,6 +33,7 @@
		#include <sys/prctl.h>
		#include <sys/stat.h>

		using base::StringPrintf;
		using bluetooth::Uuid;

		namespace android {
		@@ -582,6 +587,58 @@ static bt_os_callouts_t sBluetoothOsCallouts = {
		acquire_wake_lock_callout, release_wake_lock_callout,
		};

		#if defined(__LP64__)
		#define BLUETOOTH_LIBRARY_NAME "/system/lib64/hw/bluetooth.default.so"
		#else
		#define BLUETOOTH_LIBRARY_NAME "/system/lib/hw/bluetooth.default.so"
		#endif

		int hal_util_load_bt_library(const struct hw_module_t** module) {
		const char* id = BT_STACK_MODULE_ID;
		const char* sym = HAL_MODULE_INFO_SYM_AS_STR;
		struct hw_module_t* hmi = nullptr;

		// Always try to load the default Bluetooth stack on GN builds.
		const char* path = BLUETOOTH_LIBRARY_NAME;
		void* handle = dlopen(path, RTLD_NOW);
		if (!handle) {
		const char* err_str = dlerror();
		LOG(ERROR) << __func__ << ": failed to load Bluetooth library " << path
		<< ", error=" << (err_str ? err_str : "error unknown");
		goto error;
		}

		// Get the address of the struct hal_module_info.
		hmi = (struct hw_module_t*)dlsym(handle, sym);
		if (!hmi) {
		LOG(ERROR) << __func__ << ": failed to load symbol from Bluetooth library "
		<< sym;
		goto error;
		}

		// Check that the id matches.
		if (strcmp(id, hmi->id) != 0) {
		LOG(ERROR) << StringPrintf("%s: id=%s does not match HAL module ID: %s",
		__func__, id, hmi->id);
		goto error;
		}

		hmi->dso = handle;

		// Success.
		LOG(INFO) << StringPrintf("%s: loaded HAL id=%s path=%s hmi=%p handle=%p",
		__func__, id, path, hmi, handle);

		*module = hmi;
		return 0;

		error:
		*module = NULL;
		if (handle) dlclose(handle);

		return -EINVAL;
		}

		static void classInitNative(JNIEnv* env, jclass clazz) {
		jclass jniUidTrafficClass = env->FindClass("android/bluetooth/UidTraffic");
		android_bluetooth_UidTraffic.constructor =
		@@ -623,14 +680,12 @@ static void classInitNative(JNIEnv* env, jclass clazz) {
		method_energyInfo = env->GetMethodID(
		clazz, "energyInfoCallback", "(IIJJJJ[Landroid/bluetooth/UidTraffic;)V");

		const char* id = BT_STACK_MODULE_ID;

		hw_module_t* module;
		int err = hw_get_module(id, (hw_module_t const**)&module);
		int err = hal_util_load_bt_library((hw_module_t const**)&module);

		if (err == 0) {
		hw_device_t* abstraction;
		err = module->methods->open(module, id, &abstraction);
		err = module->methods->open(module, BT_STACK_MODULE_ID, &abstraction);
		if (err == 0) {
		bluetooth_module_t* btStack = (bluetooth_module_t*)abstraction;
		sBluetoothInterface = btStack->get_bluetooth_interface();