CN105930219B

CN105930219B - A kind of communication means of customized multithreading control

Info

Publication number: CN105930219B
Application number: CN201610261157.9A
Authority: CN
Inventors: 陆成刚; 徐利光; 王定江
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Hangzhou Markov Technology Co ltd
Priority date: 2016-04-22
Filing date: 2016-04-22
Publication date: 2019-02-05
Anticipated expiration: 2036-04-22
Also published as: CN105930219A

Abstract

A kind of communication means of customized multithreading control, includes the following steps: 1) to design an argument structure object for the entrance function of sub thread, embeds service parameter and two command pointer individual events；Embedded service parameter is required for normal service design function, and command pointer individual event is designed by the control management between father and son's thread；2) it defined in father's thread, initialize 2 local variables, address starts sub thread as uplink, down order parameter pointer；3) change local variable value in father's thread, the local variable includes down order parameter, which changes the variation for causing sub thread to execute logic；4) incoming pointer is obtained in sub thread, changes the value of uplink command parameter, which changes the variation for causing code execution logic in father's thread.The consumption of present invention reduction kernel resources, code wrap is more brief, real-time is good.

Description

A kind of communication means of customized multithreading control

Technical field

The invention belongs to the communication means that program communication method more particularly to a kind of multithreading are managed.

Background technique

Multi-thread programming is a kind of software design that the several operation systems such as Windows/Linux/vxWorks are generally supported The design method that a variety of development language platforms such as method and C/C++, Java, C# are supported.In each generic operation system of C/C++ level Management control, data communication between enterprising line journey of uniting, there is similar a concept and mode, for example, mutual exclusion, locking, synchronization and Wait etc..In JAVA since the multithreading API of language level supports that multi-thread design becomes more simple, JAVA Multi-thread control The granularity of management is thicker compared with C/C++, thus flexibility is unlike the latter.

On each type operating system, using C/C++ carry out multithread programming thread management-control method, especially two The synchronization of father and son's cross-thread progress different code sections.It is realized usually using lock mechanism, signal lamp, it can be on the windows The switching and control of code execution flow are carried out using message.But these mechanism generally use kernel objects, external variable, in resource It is not brief enough in consumption, code wrap；The message mechanism of windows be it is non real-time, sometimes will lead to the excessively long time Delay.

Summary of the invention

In order to overcome, the kernel resources consumption of the communication means of existing multithreading control is larger, code wrap is not brief, real The poor deficiency of when property, the present invention provides a kind of consumption of reduction kernel resources, code wrap is more brief, real-time is good certainly The communication means of the multithreading control of definition.

The technical solution adopted by the present invention to solve the technical problems is:

A kind of communication means of customized multithreading control, the communication means include the following steps:

1) an argument structure object is designed for the entrance function of sub thread, embedded service parameter and two orders refer to Needle individual event；Embedded service parameter is required for normal service design function, and command pointer individual event is between father and son's thread Control management designed by；

2) it defined in father's thread, initialize 2 local variables, address is opened as uplink, down order parameter pointer Mover thread；

3) change local variable value in father's thread, the local variable includes down order parameter, which changes Sub thread is caused to execute the variation of logic；

4) incoming pointer is obtained in sub thread, changes the value of uplink command parameter, and value variation causes father's thread Middle code executes the variation of logic.

Further, the step 3), 4) view actual code design needs repeatedly, alternately irregularly carry out.

Further, step 3), 4) in, caused by switching respectively in the order for executing other side's thread before code segment, in advance First initial value is changeed back parameter command.

Further, before carrying out the control to another thread by change bid value in thread, the current command is checked Whether parameter is initial value, is the revaluate that initial value just carries out order, otherwise it is assumed that preceding once to the revaluate of order, there are no draw Play the variation that thread executes flow direction.

Technical concept of the invention are as follows: devise a kind of thread code switching control technology based on command parameter, the party Method is suitable for the several operation systems such as Windows/Linux/vxWorks and realizes in C/C++ level.

Using the command parameter of built-in pointer form in the input parameter of thread function, father's thread can after starting sub thread With setting command value, sub thread executes different code segments according to order；Different command parameters also can be set in sub thread Value executes flow direction to the code segment of father's thread and controls.Its pointer ginseng that function in C/C++ language is substantially really utilized The property that carrying input and output are had both possessed by number.

Stick to ready-made Mutli-thread Programming Technology relative to existing general procedure person, and this method is different from ready-made more Thread synchronization programming mechanism；From system resources consumption, it is light weight method that the technology occupancy resource that this method uses is low；With WINDOWS message mechanism is compared, and this method real-time is good, is delayed low；This method is based on the parameter pointer realization between function, no It is related to definition outside or global variable, code wrap is relatively good.

Beneficial effects of the present invention are mainly manifested in: the consumption of reduction kernel resources, code wrap is more brief, real-time is good It is good.

Detailed description of the invention

Fig. 1 is the schematic diagram of the communication means of customized multithreading control.

Specific embodiment

The invention will be further described below in conjunction with the accompanying drawings.

Referring to Fig.1, a kind of communication means of customized multithreading control, includes the following steps:

1) an argument structure object is designed for the entrance function of sub thread, embedded service parameter and two orders refer to Needle individual event；The former is required for normal service design function, and the latter is designed by the control management between father and son's thread；

Typedef struct

{

Char*downcmd；// downlink control parameter controls sub thread for father's thread

Char*upcmd；// upload control parameter is used for sub-line process control father's thread

Struct*SunWorkPara；

}SUN_THREAD_PARA；

For example, SunWorkPara is that sub thread needed for former business is passed to parameter,

Downcmd/upcmd is the command parameter of character type, they synthesize new sub thread function

Parameter.

3) change (down order parameter) local variable value in father's thread, value variation causes sub thread execution to be patrolled The variation collected；

The step 3), 4) design of view actual code needs, and repeatedly, alternately can irregularly carry out.

The step 3), 4) in, caused by switching respectively in the order for executing other side's thread before code segment, in advance ginseng Initial value is changeed back in number order.

By changing before bid value carries out the control to another thread in thread, check the current command parameter whether be Initial value is the revaluate that initial value just carries out order, otherwise it is assumed that preceding once to the revaluate of order, there are no cause thread to execute The variation of flow direction.

Example: a method prototype with C Implementation of pseudocode, sub thread is the thread of long-term terminate-and-stay-resident here, wherein Father's thread code

Claims

1. a kind of communication means of customized multithreading control, it is characterised in that: the communication means includes the following steps:

1) an argument structure object is designed for the entrance function of sub thread, embeds service parameter and two command pointer lists ?；Embedded service parameter is required for normal service design function, and command pointer individual event is the control between father and son's thread Designed by tubulation reason；

2) it defined in father's thread, initialize 2 local variables, address is as uplink, down order parameter pointer, promoter Thread；

3) change local variable value in father's thread, the local variable includes down order parameter, and value variation causes The variation of sub thread execution logic；

4) incoming pointer is obtained in sub thread, changes the value of uplink command parameter, and value variation causes generation in father's thread Code executes the variation of logic.

2. a kind of communication means of customized multithreading control as described in claim 1, it is characterised in that: the step 3), 4) view actual code design need, and repeatedly, alternately irregularly carries out.

3. a kind of communication means of customized multithreading control as claimed in claim 1 or 2, it is characterised in that: step 3), 4) in, before code segment caused by switching respectively in the order for executing other side's thread, in advance down order parameter in father's thread Value change back that initial value, the value of uplink command parameter changes back initial value in sub thread.

4. a kind of communication means of customized multithreading control as claimed in claim 1 or 2, it is characterised in that: in thread It is interior carry out the control to father, sub thread by changing uplink, down order parameter value before, check that uplink and downlink command parameter value is No is initial value, is the revaluate that initial value just carries out uplink and downlink command parameter, otherwise it is assumed that preceding once to uplink and downlink command parameter Revaluate, there are no cause operating system execution thread dispatch execution flow direction variation.