CN111008046A - Cross-platform dynamic loading and dynamic management system for software radar components - Google Patents
Cross-platform dynamic loading and dynamic management system for software radar components Download PDFInfo
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Abstract
The invention provides a cross-platform dynamic loading and dynamic management system for a software-based radar component, wherein a cross-platform dynamic loading module realizes cross-platform dynamic loading of the software-based radar component by arranging a dynamic loading interface which encapsulates dynamic loading operations of different operating systems; the memory management optimization mechanism of the component is realized through the life cycle management module, so that the memory resources of the system can be reasonably distributed and used; by setting a starting and running mechanism for running the component database and the cross-platform dynamic loading module, the state is quickly recovered when the system is stopped and restarted. The radar application components loaded into the core framework can be stored in the operation component database, when the system is stopped and restarted, the cross-platform dynamic loading module can search the radar application components loaded when the system is stopped last time through the operation component database, and automatically load the radar application components, so that the state of the cross-platform dynamic loading module is restored to the state before the system is stopped.
Description
Technical Field
The invention belongs to a software radar technology, in particular to a dynamic loading and dynamic management technology of software radar application components.
Background
Along with the continuous change of war forms, operation environments and operation styles, the requirements on radar multifunction, dynamic multi-task capability and environmental adaptability are higher and higher, and the traditional radar system can not meet the operation requirements. Under the combined action of the required traction and the technical promotion, the software radar is generated. The software radar is a new-generation radar based on a standardized and modularized digital platform, has an open architecture, adopts an application-oriented development mode, and has system functions defined, expanded and reconstructed through software.
The radar hardware platform and the embedded real-time operating system have the characteristic of diversity, and in order to enable a framework of a software radar to run on various radar hardware platforms, a cross-platform software radar application component dynamic loading and dynamic management method is a problem which needs to be solved.
A method and a device for realizing dynamic loading in an embedded real-time operating system with the publication number of CN101458629A divide an application module into a basic platform component and a plurality of application components; when the system is started, a basic platform is operated, wherein the basic platform comprises a basic platform component, a database mode definition language (DDL) component and a real-time operating system (RTOS); wherein the DDL component provides a first interface for the base platform component to register service functions and a second interface for the application component to use the registered service functions; the basic platform components are registered after the RTOS is started, and the application components can use the service functions of the basic platform components; the application component is loaded when needed, and is unloaded after use.
The application component loaded into the system by the scheme is unloaded after the operation is finished, so that the memory occupation of the system can be reduced, but if the application component needs to be used for multiple times, the application component can be loaded for multiple times, and the efficiency of the system is reduced.
The method and the system for dynamically loading the components with the publication number of CN102541598A store the components of different function modules under an application program in different folders and store the storage paths of the corresponding components in a configuration file; when the application program is started, reading the configuration file, loading necessary components of the application program system framework, and when a request of a user for calling the functional module under the program is received, loading the components of the functional module according to the component storage path of the functional module in the configuration file and caching the components in the memory.
According to the scheme, the components are divided according to the functional modules, so that the components required by the user are loaded at the minimum when the application program is started, the starting speed of the initial system is improved, and when the system is shut down and restarted, the dynamic loading of the components is required to be carried out again, and the state of the system cannot be recovered quickly.
And the dynamic loading of the components of the two schemes can not realize the cross-platform dynamic loading operation of the components.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a software-based radar application component loading and management system which can operate in a cross-platform manner and can improve the running efficiency of components through dynamic management of the components.
The invention aims to solve the technical problem that a software-based radar component cross-platform dynamic loading and dynamic management system comprises a cross-platform dynamic loading module, a life cycle management module, a component warehouse, a dynamic loading interface and a database;
the component warehouse is used for storing the radar application components, and when the radar application components need to be added to the software-based radar system, the radar application components are added to the component warehouse; the cross-platform dynamic loading module searches, loads and uses the radar application component through a component warehouse; when the cross-platform dynamic loading module searches the radar application components in the component warehouse, the component warehouse transmits the absolute path of the radar application to the cross-platform dynamic loading module;
the running component database is used for storing the information of all radar application components loaded by the cross-platform dynamic loading module in the running process of the software radar system; when the radar application component is deleted from the cross-platform dynamic loading module, the running component database synchronously deletes the stored information of the radar application component;
the dynamic loading interface is used for calling by the cross-platform dynamic loading module when the radar application component is loaded, firstly judges an operating system platform used by the cross-platform dynamic loading module and calls a corresponding dynamic loading mode according to the identified operating system;
the life cycle management module runs when the system is started and is used for carrying out state management on the radar application components loaded to the cross-platform dynamic loading module and carrying out installation, analysis, activation and logout treatment on the radar application components; there are four lifecycle states for radar application components: uninstlaled, mounted INSTALLED, RESOLVED, activated; after the radar application component is loaded to the cross-platform dynamic loading module, the life cycle management module sets the state of the radar application component to INSTALLED; when the cross-platform dynamic loading module needs to use the function of the radar application component with the state of INSTALLED, the life cycle module firstly analyzes the radar application component, the analysis is successful, the state of the radar application component is set to be RESOLVED, then the function of the radar application component is registered in the cross-platform dynamic loading module to complete activation, and after the activation is completed, the state of the radar application component is set to be ACTIVE and memory resources are applied for the radar application component; setting the state of the radar application component to INSTALLED if the parsing is unsuccessful; after the cross-platform dynamic loading module finishes using the radar application component, the life cycle management module logs out the functions of the radar application component from the cross-platform dynamic loading module, recovers the applied memory resource and sets the state of the radar application component to be RESOLVED; when the radar application component is unloaded, the life cycle management module deletes the radar application component from the cross-platform dynamic loading module and sets the state of the radar application component to be UNINSTALLED;
the cross-platform dynamic loading module runs when the software radar system is started; the system is used for completing the loading and functional use of the radar application component; the cross-platform dynamic loading module searches the radar application component from the component warehouse, and calls a dynamic loading interface to load the radar application component according to the transmitted absolute path of the component when receiving the absolute path of the radar application component transmitted by the component warehouse; the cross-platform dynamic loading module accesses the running component database after being started, reads the stored information of the radar application component and completes the automatic loading of the radar application component running when the radar application component is shut down last time; when a user needs to use a radar application component which is not in a UNINSTALLED state, a cross-platform dynamic loading module finishes loading the radar application component; the cross-platform dynamic loading module can only use the registered radar application component functions.
The invention has the beneficial effects that:
1) the cross-platform dynamic loading of the software radar component is realized by arranging a dynamic loading interface which encapsulates the dynamic loading operation of different operating systems;
2) the memory management optimization mechanism of the component is realized through the life cycle management module, when a certain application component needs to be used, the life cycle management module can analyze and activate the application component to apply for the memory, and after the application component is used up, the life cycle management module can stop the application component to release the memory applied during activation. The memory management mechanism of the component enables the memory resources of the system to be reasonably distributed and used;
3) by setting a starting and running mechanism for running the component database and the cross-platform dynamic loading module, the state is quickly recovered when the system is stopped and restarted. The loaded radar application components can be stored in the operation component database, when the system is stopped and restarted, the cross-platform dynamic loading module can search the radar application components loaded when the system is stopped last time through the operation component database, and automatically load the radar application components, so that the state of the cross-platform dynamic loading module is restored to the state before the system is stopped.
Drawings
FIG. 1 acquires a path of a component warehouse;
FIG. 2 is a schematic diagram of a state recovery at system restart;
FIG. 3 is a diagram of a cross-platform loading process for radar application components;
FIG. 4 is a radar application component lifecycle management flow;
FIG. 5 is a flow chart of an embodiment of the present invention;
fig. 6 is an overall frame diagram of the present invention.
Detailed Description
The embodiment of the invention is carried out in a Qt environment, the Qt has a good cross-platform mechanism, and the cross-platform dynamic loading of the component can be realized by means of the cross-platform characteristic of the Qt; qt is the extension of C + +, C + + has great advantages in the aspect of embedding, which is beneficial to the embedded design of radar application components, and C + + has excellent real-time performance and can meet the requirements of radar application components on real-time performance.
The software radar system comprises a cross-platform dynamic loading and dynamic management system and a radar application component, wherein the cross-platform dynamic loading and dynamic management system comprises a core framework, and the core framework comprises a cross-platform dynamic loading module and a life cycle management module of the radar application component;
when the software-based radar system is started, a core framework is operated firstly, when a user needs to use a radar application component with a certain function, the component is loaded through a cross-platform dynamic loading module of the core framework, and after the radar application component is loaded to the framework, the component is managed through a life cycle management module of the core framework.
The steps required to run the core framework include:
1. obtaining a path of a component repository: as shown in fig. 1, in order to facilitate the management of radar application components, a component repository is used to store the radar application components, and after the core framework is started, components with specific functions are loaded from the component repository as required. If a radar application component with certain functions is added to the component warehouse, the core framework can quickly search, load and use the radar application component.
2. And (3) establishing an SQLite database, wherein the SQLite database is used for storing information of all radar application components loaded by the running process of the core framework, and comprises paths of the components, versions of the components, unique identifiers of the components and the like, as shown in figure 2. The radar application components loaded into the core framework can be stored in the SQLite database, when the system is stopped and restarted, the core framework can search the radar application components loaded in the core framework when the system is stopped last time through the database, and the core framework can automatically load the radar application components, so that the state of the core framework is restored to the state before the system is stopped. By using the database, the system shutdown restart speed is improved.
The process that the core framework loads the specific radar application component by using the cross-platform dynamic loading module of the component according to the user requirement specifically comprises the following steps:
1. acquiring the absolute path of the component: when a user needs to use a radar application component with a specific function, the core framework searches the component from the component warehouse and transmits the absolute path of the component as a parameter to a cross-platform dynamic loading module.
2. Dynamically loading radar application components: and the cross-platform dynamic loading module of the core framework dynamically loads the radar application component according to the incoming component absolute path. As shown in fig. 3, in the Windows platform, the radar application component exists in the form of a dynamic link library DLL file, in the Linux platform, the radar application component exists in the form of a shared library SO file, and different methods for dynamically loading the dynamic link library or the shared library by different operating systems are different. The cross-platform dynamic loading module of the core framework encapsulates dynamic loading operations of different operating systems into a uniform interface, when the core framework needs to dynamically load a radar application component with a certain specific function, the interface is called, the operating system platform used by the framework is judged in the interface, different methods are called according to different operating systems to dynamically load the component, and therefore the effect of cross-platform dynamic loading is achieved.
3. Storing radar application components: when the core framework is started, an SQLite database is created, and the radar application components loaded to the core framework are stored in the database. When the system is restarted, the radar application components in the database are inquired and loaded, and the system is quickly recovered.
The process of radar application component management using the lifecycle management module of the core framework is illustrated in fig. 4: by utilizing a memory management mechanism of the assembly, the core framework can manage the memory occupied by the radar application assembly through the life cycle management module, when the core framework needs to use a certain application assembly, the life cycle management module can analyze and activate the application assembly to apply for the memory, and after the application assembly is used up, the life cycle management module can stop the application assembly to release the memory applied during activation. The memory management mechanism of the component enables the memory resources of the system to be reasonably distributed and used:
1. the radar application component has four life cycle states, which are respectively: UNINSTALLED (not mounted), INSTALLED (mounted), RESOLVED (RESOLVED), ACTIVE (activated).
2. After the radar application component is loaded to the framework, the state of the component is INSTALLED, at this time, the function of the radar application component cannot be used, and when the function of a certain radar application component needs to be used, the life cycle module of the core framework needs to be used for analyzing and activating the radar application component;
3. analyzing the radar application component, wherein the analysis is to check whether the component meets the dependency relationship specified in the component description information, if the dependency relationship is met, the analysis is successful, the state of the component is changed into RESOLVED, and if the dependency relationship is not met, the state of the component is INSTALLED;
4. activating the radar application component, wherein the activation is to register the function of the component in the framework, the function of the component can be used by other application components in the framework only after the function of the component is registered, after the activation is finished, the state of the component is ACTIVE, and when the radar application component is activated, a certain memory resource can be applied for the component;
5. after the components are used, the life cycle management module stops the components;
6. stopping the radar application component, wherein stopping is to cancel the function of the component from the framework, after cancellation, the function of the component cannot be used, after the stopping operation is completed, the state of the component is RESOLVED, and the memory resource applied when the component is activated can be recovered in the stopping process, so that the memory management of the component is realized;
7. when the radar application component needs to be used again, the component does not need to repeatedly carry out loading analysis operation of the component, and only needs to be activated again.
8. And unloading the radar application assembly, wherein the unloading is to delete the assembly from the frame, after the unloading is finished, the information of the assembly can be deleted from the database, the state of the assembly is UNINSTALLED, and when the radar application assembly needs to be used again, the dynamic loading operation of the assembly needs to be carried out again.
Examples
The cross-platform dynamic loading and dynamic management system for the software radar components is used for dynamically loading and managing components such as a pedestrian detection component, a human behavior recognition component, a human gesture recognition component and a human breath monitoring component, the processing flow is shown in fig. 5, and the system block diagram is shown in fig. 6.
A core framework with cross-platform component dynamic loading and dynamic management capabilities is realized by using C + +, and the core framework is used for dynamically loading and managing radar application components. In the embodiment of the invention, the radar application components used comprise a pedestrian detection module, a human motion recognition component, a human gesture recognition component and a human breath detection component. The pedestrian detection module, the human body motion recognition component and the human body gesture recognition component are radar application components designed in advance, and are managed in a unified mode through a component warehouse. The human breath detection component is a component newly added in the system operation process, and firstly needs to be written into a data warehouse, and then the core framework can find and use the component by searching the component warehouse. When the system is started, the core framework can be operated firstly, in the process, the core framework can acquire a path of the component warehouse, when a user needs to use the human motion recognition component, the core framework can search the component from the component warehouse, if the component is searched, an absolute address of the component can be transmitted into a cross-platform dynamic loading module of the core framework in a parameter transmission mode, after the cross-platform dynamic loading module receives the parameter, a uniform interface of the dynamic loading module can be called to load the component, the uniform interface can judge the operation system operated by the core framework firstly, and then the component is dynamically loaded by using the component loading operation corresponding to the operation system. If the component frame cannot be searched in the component warehouse, a NULL value is transmitted to a cross-platform dynamic loading module of the core frame, and after receiving the NULL, the module outputs a piece of prompt information to a user, so that the user can conveniently find the error reason. In the operation process of the core framework, an SQLite database is also created, and after the human motion recognition component is loaded into the core framework, the SQLite database is stored in the SQLite database, wherein the SQLite database comprises an absolute path of the component, a name of the component, a version of the component, a unique identifier of the component and the like. And after the system is restarted, the core framework reads the radar application component information stored in the data and automatically loads the radar application component information, so that the effect of recovering the running state of the system is achieved.
The cross-platform dynamic loading module of the core framework is realized by packaging dynamic loading technologies of different platform components. Under a Windows platform, radar application components exist in a dynamic link library DLL (dynamic link library), under the Windows platform, dynamic link library access is realized through functions such as LoadLibrary (loading dynamic library), GetProcAddress (acquiring function address), FreeLibrary (releasing dynamic library), and the like, under a Linux platform, radar application components exist in a shared library SO manner, under the Linux platform, shared library access is realized through functions such as dlopen dynamic library, dlsym (acquiring function address), dlclose dynamic library, dlerror (dynamic library error), and the like, and real-time operating systems such as VxWorks also have corresponding functions to carry out dynamic library access. And a cross-platform dynamic loading module in the core framework encapsulates functions of various platforms accessing the dynamic library into a uniform interface, and a user can realize cross-platform dynamic loading of the radar application component through the uniform interface. In the embodiment of the invention, the Windows platform is used for verification. After the core framework is started, a user needs to detect pedestrians on the road by using the pedestrian detection assembly, after the core framework searches the radar assembly from the assembly warehouse, the unified interface for dynamic loading of the assembly is called to dynamically load the radar pedestrian detection assembly, the platform is detected through a judgment function in the interface, the core framework is detected to run under the Windows platform in the embodiment, and then the assembly is loaded by a dynamic library loading method of the Windows platform under the condition of calling the unified interface. The cross-platform dynamic loading of the radar application component is realized through the encapsulated uniform interface.
And the life cycle management module of the core framework is used for dynamically managing the radar application components loaded into the core framework. After radar application components (pedestrian detection components, human behavior recognition components and the like) are loaded into a core framework, functions of the components cannot be used immediately, and if the functions of the components are used, analysis and activation operation of the components are required, wherein the analysis is to check whether the components meet the dependency relationship specified in the component description information, if the dependency relationship is met, the analysis is successful, and if the dependency relationship is not met, the analysis is failed. After the component is successfully analyzed, an activation operation is required, the component activation operation is to register the function of the component in the core framework, and when the component is activated, a certain memory is applied for the component in the core framework. Upon activation of a component, the core framework or other radar application component may use the functionality provided by the component to perform a particular operation. After the components are used, the life cycle management module can stop the components, and in the stopping process, the core framework can release the memory applied when the components are activated, so that the dynamic management of the component memory is realized. After the component is stopped, the function of the component cannot be used, and when the component needs to be used again, the component needs to be analyzed and activated again. In the process of this embodiment, firstly, a human body detection component and a human body behavior recognition component are needed to perform pedestrian detection and behavior recognition on radar echo signals, and in this process, the life cycle management module needs to analyze and activate the components. When the user demand changes, namely the human behavior recognition is not needed, but the human gesture recognition is needed, the life cycle management module is needed to be used, the operation and the analysis of the human behavior recognition component are stopped, the human gesture recognition component is activated, the operation of the stop component is beneficial to recovering the memory occupied by the component, and the occupation of the memory is reduced.
Claims (6)
1. A cross-platform dynamic loading and dynamic management system for a software-based radar component is characterized by comprising a cross-platform dynamic loading module, a life cycle management module, a component warehouse, a dynamic loading interface and a database;
the component warehouse is used for storing the radar application components, and when the radar application components need to be added to the software-based radar system, the radar application components are added to the component warehouse; the cross-platform dynamic loading module searches, loads and uses the radar application component through a component warehouse; when the cross-platform dynamic loading module searches the radar application component in the component warehouse, the component warehouse transmits an absolute path of the radar application component as a parameter to the cross-platform dynamic loading module;
the running component database is used for storing the information of all radar application components loaded by the cross-platform dynamic loading module in the running process of the software radar system; when the radar application component is deleted from the cross-platform dynamic loading module, the running component database synchronously deletes the stored information of the radar application component;
the dynamic loading interface is used for calling by the cross-platform dynamic loading module when the radar application component is loaded, firstly judges an operating system platform used by the cross-platform dynamic loading module and calls a corresponding dynamic loading mode according to the identified operating system;
the life cycle management module runs when the system is started and is used for carrying out state management on the radar application components loaded to the cross-platform dynamic loading module and carrying out installation, analysis, activation and logout treatment on the radar application components; there are four lifecycle states for radar application components: uninstlaled, mounted INSTALLED, RESOLVED, activated; after the radar application component is loaded to the cross-platform dynamic loading module, the life cycle management module sets the state of the radar application component to INSTALLED; when the cross-platform dynamic loading module needs to use the function of the radar application component with the state of INSTALLED, the life cycle module firstly analyzes the radar application component, the analysis is successful, the state of the radar application component is set to be RESOLVED, then the function of the radar application component is registered in the cross-platform dynamic loading module to complete activation, and after the activation is completed, the state of the radar application component is set to be ACTIVE and memory resources are applied for the radar application component; setting the state of the radar application component to INSTALLED if the parsing is unsuccessful; after the cross-platform dynamic loading module finishes using the radar application component, the life cycle management module logs out the functions of the radar application component from the cross-platform dynamic loading module, recovers the applied memory resource and sets the state of the radar application component to be RESOLVED; when the radar application component is unloaded, the life cycle management module deletes the radar application component from the cross-platform dynamic loading module and sets the state of the radar application component to be UNINSTALLED;
the cross-platform dynamic loading module runs when the software radar system is started; the system is used for completing dynamic loading and functional use of the radar application component; the cross-platform dynamic loading module searches the radar application component from the component warehouse, and calls a dynamic loading interface to load the radar application component according to the transmitted absolute path of the component when receiving the absolute path of the radar application component transmitted by the component warehouse; the cross-platform dynamic loading module accesses the running component database after being started, reads the stored information of the radar application component and completes the automatic loading of the radar application component running when the radar application component is shut down last time; when a user needs to use a radar application component which is not in a UNINSTALLED state, a cross-platform dynamic loading module finishes loading the radar application component; the cross-platform dynamic loading module can only use the registered radar application component functions.
2. The system of claim 1, wherein the compilation environment of the system is a Qt environment.
3. The system of claim 1, wherein the runtime component database is a SQLite database.
4. The system of claim 1, wherein the lifecycle module determines whether the parsing is successful by checking whether the radar application component satisfies a specified dependency, wherein if the dependency is satisfied, the parsing is successful, and otherwise, the parsing is not successful.
5. The system of claim 1, wherein the information of the radar application component includes a path of the component, a version of the component, a unique identifier of the component, and the like.
6. The system of claim 1, wherein the dynamic loading interface first determines an operating system platform used by the cross-platform dynamic loading module, and invokes a corresponding dynamic loading mode according to the identified operating system specifically as follows:
when the operating platform of the cross-platform dynamic loading module is Windows, the dynamic loading interface loads the radar application component in a mode of aiming at the DLL file of the dynamic link library;
and when the operating platform of the cross-platform dynamic loading module is Linux, the dynamic loading interface loads the radar application component in a mode of aiming at the SO file of the shared library.
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| CN111562951B (en) * | 2020-05-11 | 2022-05-03 | 电子科技大学 | Radar application component service implementation method |
| CN111698217A (en) * | 2020-05-19 | 2020-09-22 | 电子科技大学 | Software radar universal communication middleware |
| CN111698217B (en) * | 2020-05-19 | 2022-01-28 | 电子科技大学 | Software radar universal communication middleware |
| CN111651380A (en) * | 2020-06-17 | 2020-09-11 | 中国电子科技集团公司第十四研究所 | Parameter loading method based on descriptor table |
| CN111651380B (en) * | 2020-06-17 | 2023-08-18 | 中国电子科技集团公司第十四研究所 | Parameter loading method based on descriptor table |
| CN112506504A (en) * | 2020-11-13 | 2021-03-16 | 北京理工雷科电子信息技术有限公司 | Rapid reconstruction method based on software radar |
| CN112506504B (en) * | 2020-11-13 | 2024-04-09 | 北京理工雷科电子信息技术有限公司 | Rapid reconstruction method based on software radar |
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