79839a4325
1.modifications:
modified: testsuites/unittest/IO/It_test_IO.h
modified: testsuites/unittest/IO/full/IO_test_duplocale_001.cpp
modified: testsuites/unittest/IO/io_test.cpp
2.add 19 testcases:
IO_test_dcgettext_001.cpp
IO_test_dcgettext_002.cpp
IO_test_dcngettext_001.cpp
IO_test_dcngettext_002.cpp
IO_test_dngettext_001.cpp
IO_test_dngettext_002.cpp
IO_test_duplocale_001.cpp
IO_test_locale_001.cpp
IO_test_ngettext_001.cpp
IO_test_nl_langinfo_001.cpp
IO_test_nl_langinfo_l_001.cpp
IO_test_strcasecmp_l_001.cpp
IO_test_strfmon_l_001.cpp
IO_test_strncasecmp_l_001.cpp
It_stdio_hasmntopt_001.cpp
IO_test_gettext_001.cpp
IO_test_locale_002.cpp
IO_test_strcasecmp_l_002.cpp
IO_test_strfmon_l_002.cpp
IO_test_strncasecmp_l_002.cpp
3.influence:
none
Signed-off-by: liuzhiwan <liuzhiwan2020@163.com>
Change-Id: Ib5883ddb14cfd545f2c5b1685a082f098def0965
LiteOS Cortex-A
Introduction
The OpenHarmony LiteOS Cortex-A is a new-generation kernel developed based on the Huawei LiteOS kernel. Huawei LiteOS is a lightweight operating system (OS) built for the Internet of Things (IoT) field. With the rapid development of the IoT industry, OpenHarmony LiteOS Cortex-A brings small-sized, low-power, and high-performance experience and builds a unified and open ecosystem for developers. In addition, it provides rich kernel mechanisms, more comprehensive Portable Operating System Interface (POSIX), and a unified driver framework, Hardware Driver Foundation (HDF), which offers unified access for device developers and friendly development experience for application developers. Figure 1 shows the architecture of the OpenHarmony LiteOS Cortex-A kernel.
Figure 1 Architecture of the OpenHarmony LiteOS Cortex-A kernel
Directory Structure
/kernel/liteos_a
├── apps # User-space init and shell application programs
├── arch # System architecture, such as ARM
│ └── arm # Code for ARM architecture
├── bsd # Code of the driver and adaptation layer module related to the FreeBSD, such as the USB module
├── compat # Kernel API compatibility
│ └── posix # POSIX APIs
├── drivers # Kernel drivers
│ └── char # Character device
│ ├── mem # Driver for accessing physical input/output (I/O) devices
│ ├── quickstart # APIs for quick start of the system
│ ├── random # Driver for random number generators
│ └── video # Framework of the framebuffer driver
├── fs # File system module, which mainly derives from the NuttX open-source project
│ ├── fat # FAT file system
│ ├── jffs2 # JFFS2 file system
│ ├── include # Header files exposed externally
│ ├── nfs # NFS file system
│ ├── proc # proc file system
│ ├── ramfs # RAMFS file system
│ └── vfs # VFS layer
├── kernel # Kernel modules including the process, memory, and IPC modules
│ ├── base # Basic kernel modules including the scheduling and memory modules
│ ├── common # Common components used by the kernel
│ ├── extended # Extended kernel modules including the dynamic loading, vDSO, and LiteIPC modules
│ ├── include # Header files exposed externally
│ └── user # Init process loading
├── lib # Kernel library
├── net # Network module, which mainly derives from the lwIP open-source project
├── platform # Code for supporting different systems on a chip (SOCs), such as Hi3516D V300
│ ├── hw # Logic code related to clocks and interrupts
│ ├── include # Header files exposed externally
│ └── uart # Logic code related to the serial port
├── platform # Code for supporting different systems on a chip (SOCs), such as Hi3516D V300
├── security # Code related to security features, including process permission management and virtual ID mapping management
├── syscall # System calling
└── tools # Building tools as well as related configuration and code
Constraints
- Programming languages: C and C++
- Applicable development boards: Hi3518E V300 and Hi3516D V300
- Hi3518E V300 uses the JFFS2 file system by default, and Hi3516D V300 uses the FAT file system by default.
Usage
OpenHarmony LiteOS Cortex-A supports the Hi3518E V300 and Hi3516D V300. You can develop and run your applications based on both development boards.
Preparations
You need to set up the compilation environment on Linux.
- Compilation environment on Linux
- For Hi3518E V300, see Setting Up the Hi3518 Development Environment.
- For Hi3516D V300, see Setting Up the Hi3516 Development Environment.
Source Code Acquisition
Download and decompress a set of source code on a Linux server to acquire the source code.
Compilation and Building
For details about how to develop the first application, see:
Repositories Involved
kernel_liteos_a