AidConnect C++ API

💡Note When developing with Aidconnect-SDK C++, the following points need to be noted:

• The header file must be included during compilation, stored at: /usr/local/include/aidlux/aidconnect/aidconnect.hpp
• The library file must be specified during linking, stored at: /usr/local/lib/aidlux/aidconnect/libaidconnect.so

enum struct LogLevel

Member Variable Name	Type	Default Value	Description
DEBUG	uint8_t	0	Debug log level
INFO	uint8_t	1	Info log level
WARNING	uint8_t	2	Warning log level
ERROR	uint8_t	3	Error log level

Class Aidkv

A shared memory communication class implemented based on C++.

get_library_version()

API	get_library_version
Description	Used to obtain version-related information of the current Aidconnect.
Parameters	void
Return	Returns a string containing the version information of the current Aidconnect

set_log_level()

API	set_log_level
Description	Sets the current minimum log level, and outputs log data with levels greater than or equal to this level. By default, logs of WARNING level and above are printed.
Parameters	log_level: Value of the enumeration type LogLevel
Return	Returns 0 by default

init()

As the name implies, this function implements relevant initialization work.

API	init
Description	Completes relevant initialization work
Parameters	void
Return	0 indicates the initialization operation is successful; a non-0 value indicates failure

int status = aidconnect.init();
if(EXIT_SUCCESS != status){
    printf("aidconnect.init failed !\n");
    return EXIT_FAILURE;
}

aidconnect_with_name()

This function is used to specify which shared memory block we need to use. It should be noted that this interface only checks whether a shared memory block exists and does not create new shared memory (the creation of shared memory is implemented by the Android-side interface).

API	aidconnect_with_name
Description	Specifies the use of a specific shared memory block
Parameters	block_id: ID string of a specific shared memory block
Return	0 indicates the operation is successful; a non-0 value indicates failure

status = aidconnect.aidconnect_with_name("we");
if(EXIT_SUCCESS != status){
    printf("aidconnect.aidkv_with_id failed !\n");
    return EXIT_FAILURE;
}

set_bytes()

This function writes byte data to the corresponding shared memory.

API	set_bytes
Description	Writes byte data to the corresponding shared memory
Parameters	buffer: Memory address storing the data
	len: Byte length of the data to be written
Return	0 indicates the write operation is successful; a non-0 value indicates failure

status = aidconnect.set_bytes(buffer, sizeof(buffer));
if(EXIT_SUCCESS != status){
    printf("aidconnect.set_bytes failed !\n");
    return EXIT_FAILURE;
}

get_bytes()

This function reads the required byte data from the corresponding shared memory.

API	get_bytes
Description	Reads the required byte data from the corresponding shared memory
Parameters	buffer: Address of a pointer variable; the function copies data to this pointer variable address
	len: Byte length of the data to be obtained
Return	0 indicates the read operation is successful; a non-0 value indicates failure
Note	Before using this interface, developers need to allocate the required memory by themselves to store the data obtained from the shared memory

status = aidconnect.get_bytes(&result, &length);
if(EXIT_SUCCESS != status){
    printf("aidconnect.get_bytes failed !\n");
    return EXIT_FAILURE;
}

AidConnect C++ Sample Program

💡Note

The AidConnect-SDK sample program is installed with the software package:

• C++ sample program path: /usr/local/share/aidconnect/examples/cpp/

The C++ sample program here roughly includes the following parts:

Initialization

Initialization is a mandatory step, which will complete prerequisites such as configuration parsing.

Aidlux::AidConnect aidconnect;
int status = aidconnect.init();
if(EXIT_SUCCESS != status){
    printf("aidconnect.init failed !\n");
    return EXIT_FAILURE;
}

Associate a Specific Shared Memory Block

To achieve data interaction, the entities that need to exchange data must focus on the same shared memory block and perform read/write operations on it.

status = aidconnect.aidconnect_with_name("your_shm_name");
if(EXIT_SUCCESS != status){
    printf("aidconnect.aidconnect_with_name failed !\n");
    return EXIT_FAILURE;
}

Read and Write Data

The essence of data interaction is the read/write operation of the same data. Here is an example of a write operation:

char buffer[] = "Hello Cpp";
status = aidconnect.set_bytes(buffer, sizeof(buffer));
if(EXIT_SUCCESS != status){
    printf("aidconnect.set_bytes failed !\n");
    return EXIT_FAILURE;
}

Similarly, the read operation follows the same steps: initialize first, then associate the shared memory block, and finally call the data reading interface to obtain data.