38results about How to "Avoid memory leaks" patented technology

The invention relates to a memory management method of an embedded system, which comprises the steps of: (1), opening up a physical memory, managing the physical memory by using a turnover thread heap management system, and allocating a memory space for data requirement from the tail end and the head end of a thread heap free memory by the thread heap management system, wherein the thread heap free memory has a normal state N and a turnover state F; (2), dividing all data requirements into a temporary space requirement and an output space requirement, and allocating one end of the thread heap free memory to be a temporary end or an output end by a type thread heap management system according to the data requirements; (3), allocating a head end memory to data required in a temporary space by the thread heap management system; and (4), when a superior function calls a subordinate function, controlling the thread heap free memory to turn over by the thread heap management system, when exiting the subordinate function, releasing a temporary space at the current temporary end, preserving the output space of the output end and merging with the temporary space of the temporary end of the superior function. The invention can realize timely release of the memory, has high operating efficiency, does not generate memory fragments, and can operate stably and efficiently for a long time.

The invention discloses a method for zero copy of an embedded system memory. The method comprises the following steps that S10, a unified data block format which comprises a standard head, an extension head and a reserved space is adopted; S20, a module A allocates a memory to the data Z according to a unified data block format, and configures a mem_msg field; and writing data Z in the corresponding header position of the unified data block format; S30, the module A expands the data structure of the pbuf, and adds a pointer pointing to the head of the Ethernet and the memory allocation and release field; S40, the module A processes the data Z based on the expanded pbuf data structure, and adds a release function pointer in a mem_msg field pointed by the pkt_msg pointer in a pbuf release function; S50, the module B reads the memory allocation and release field, and calls the memory release function pointed by the release function pointer to release the memory occupied by the data Z. According to the method, memory allocation and release and data zero-copy transmission are optimized.

The system comprises: setting a call control module array, a call control node array, a Harsh queue array and an idle node array; getting the call reference in relevant message, and making Harsh operation for the call reference to generate a H1 value; according to the array element in the Harsh queue array whose subscript value is H1, getting the opposite linked table; sequentially looking up, and comparing the reference value, until finding the call control module opposite to t he call reference value.

Embodiments of the invention disclose a cache data processing method and device, and the method and device are applied in a preset cache. The method comprises the following steps of: obtaining service configuration templates, wherein the service configuration templates are configuration templates corresponding to a second type of services which are generated through assembling a first type of services through a preset graphic operation interface; configuring a service identifier for each service configuration template; generating a corresponding query identifier according to each service identifier; and storing the service configuration templates and the corresponding query identifiers in a system memory. According to the cache data processing method and device, the query efficiency can be improved to improve the bus operation speed, a special cache server does not need to be used, and no network broadband requirements exist so that the hardware cost is saved.

The invention relates to an embedded software memory management system, and relates to the technical field of embedded software memory management. The present invention adopts the method of static allocation, presets the number of partitions in the system memory area and the number and size of memory blocks in each partition, and then adopts a dynamic memory allocation method for the user memory area based on the pool memory management mechanism. The memory allocator handles memory application and release requests, and improves the traditional dynamic memory allocation and release algorithms. This method uses a combination of static allocation of system memory area and dynamic allocation of user memory area, which increases the flexibility of the system, and at the same time limits the generation of a large number of fragments, avoiding the occurrence of memory leaks, and this method can effectively reduce the application and It takes time to release memory and improve the efficiency of dynamic memory management.

The present application discloses a zero-copy method for embedded system memory, which includes the following steps. Step S10: adopting a unified data block format, including a standard header, an extended header and a reserved space. Step S20: Module A allocates memory for data Z according to the unified data block format, and configures the mem_msg field; at the same time, writes data Z in the corresponding head position of the unified data block format. Step S30: module A expands the data structure of pbuf, and adds pointers to the Ethernet header and memory allocation and release fields. Step S40: Module A processes data Z based on the expanded pbuf data structure, and adds a release function pointer in the mem_msg field pointed to by the pkt_msg pointer in the pbuf release function. Step S50: Module B reads the memory allocation and release field, and calls the memory release function pointed to by the release function pointer therein to release the memory occupied by data Z. This application optimizes memory allocation and release, and data zero-copy transfer.

A tag data processing method is disclosed. The method includes: receiving tag information sent by an adapter, updating the stored tag data according to the tag information, determining a tag state after the tag information has been received, and sending the tag of which the tag state is active to an upper layer for processing. A tag data processing device is also disclosed. By using the method and the device, the burden of data processing is reduced for a system, and the generation of redundant data is avoided.

The embodiment of the invention provides a method and a device for using Handler to carry out message processing by a function class. The method for using the Handler to carry out the message processing by the function class comprises the following steps that: a function class receives a business processing request message; and the function class processes the business processing request message through a first Handler class and a second Handler class, wherein the second Handler class weakly cites the first Handler class, and the second Handler class is a native Handler subclass. By use of the embodiment of the invention, in a simple way, a reachable path from the native Handler to the function class is weak reachability, the problem of function class OOM (Out Of Memory) since the native Handler is directly used is effectively avoided, and the collapse rate and the OOM problem of APP can be lowered.

The invention discloses a database cursor control method and database system. The database cursor control method comprises: when a database activated cursor is detected, recording the activated cursor and its cursor level to obtain a sorted list of all activated cursors; When an activated and idle low-level cursor is detected in the sorted list, the memory resources occupied by the low-level cursor are released. When the memory resource is insufficient, the invention closes the cursor according to the cursor level to release the resource, and effectively solves the memory leakage caused by the database cursor.

The invention relates to an embedded software memory management method, and relates to the technical field of embedded software memory management. The present invention adopts the method of static allocation, presets the number of partitions in the system memory area and the number and size of memory blocks in each partition, and then adopts a dynamic memory allocation method for the user memory area based on the pool memory management mechanism. The memory allocator handles memory application and release requests, and improves the traditional dynamic memory allocation and release algorithms. This method uses a combination of static allocation of system memory area and dynamic allocation of user memory area, which increases the flexibility of the system, and at the same time limits the generation of a large number of fragments, avoiding the occurrence of memory leaks, and this method can effectively reduce the application and It takes time to release memory and improve the efficiency of dynamic memory management.

The embodiment of the invention provides an event registration method, an application program compiling method and device, electronic equipment and a storage medium, and relates to the technical field of application program compiling. The event registration method comprises the following steps: acquiring a source code file, and searching the type of the source code file; according to the type, confirming a registration method and an anti-registration method; and calling a running state SDK (Software Development Kit) to inject corresponding event registration codes and anti-registration codes into the registration and anti-registration methods, and packaging into an executable file. According to the technical scheme, the setting efficiency of event registration in compiling can be improved.

The embodiment of the present invention discloses an object release method, device, device and storage medium. The method includes: using the component identifier of the component and the class object of the class class type in the component as function input parameters, and calling the data in the data management object. The navigation function determines the instance object corresponding to the class object, and stores the instance object and the object identifier of the instance object to the target location corresponding to the component identifier in the data cache object; when the component destruction operation of the component is detected, the component identifier is used as a function Input parameters, call the data release function in the data management object, and release the component identifier stored in the data cache object, the instance object corresponding to the component identifier, and the object identifier of the instance object. Through the technical solutions of the embodiments of the present invention, the instant release of the instance object can be realized, the problem of memory leakage can be effectively avoided, and the normal operation of the application program can be ensured.

The embodiment of the invention discloses a barrage message distribution method, device, terminal and storage medium. The method includes: after the first live broadcast room is destroyed, if the activation instruction is received again, calling the life cycle creation function of the first live broadcast room, and sending the first identification information and the corresponding current first reference to the barrage distribution object relationship; the barrage distribution object replaces the historical reference relationship of the first live broadcast room stored in the preset key-value pair set object with the current first reference relationship according to the first identification information; wherein, the current first reference relationship inherits from the preset Set up the listener interface protocol, and the preset listener interface protocol includes the receiving method of the bullet chat message; the bullet chat distribution object distributes the bullet chat message to the first live broadcast by calling the receiving method of the bullet chat message based on the current first reference relationship between. By adopting the above technical solution, the problem of memory leak is solved on the basis of distributing the barrage messages to the running live broadcast room.

The invention provides a method for realizing a fly wire effect based on a web front-end technology. The method comprises the steps of setting a data filtering condition a1; according to the filteringconditions a1, receiving the request data, establishing a data processing queue A, sending the obtained request data to the data processing queue A, drawing a flying wire from the advanced data of the request data in the data processing queue A, positioning a source address and a destination address on a map according to the addresses contained in the advanced data, drawing the flying wire between the source address and the destination address on the map, and counting 1; storing the drawn data, the fly wires and the counts as the fly wire data in a reserved fly wire library. According to themethod, by acquiring the data in the recent preset time in real time, drawing the data in a queue form, and displaying the data on the map, the source address and the destination address of the real-time data meeting the conditions is emphatically displayed, and the method has the advantages of high efficiency, good performance, good interaction effect, prevention of memory leakage and improvementof data processing efficiency.