CN103995736B - A kind of method and apparatus for transmitting shared drive - Google Patents
A kind of method and apparatus for transmitting shared drive Download PDFInfo
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- CN103995736B CN103995736B CN201310446221.7A CN201310446221A CN103995736B CN 103995736 B CN103995736 B CN 103995736B CN 201310446221 A CN201310446221 A CN 201310446221A CN 103995736 B CN103995736 B CN 103995736B
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Abstract
The embodiment of the invention discloses a kind of method and apparatus for transmitting shared drive.Wherein, the method for the transmission shared drive includes：Call function creates shared drive using the local memory address of caller process as keyword and using described shared drive keyword as parameter constructor call statement；Described function call sentence is sent to callee process, so that callee process analytical function call statement obtains shared drive, data exchange is realized.Using method and apparatus provided in an embodiment of the present invention, it is possible to achieve the unification of local memory both data exchange ways in the shared drive and process between process, the synchronism of data exchange is improved.
Description
This case is Application No. 201110164503.9（A kind of method and apparatus for transmitting shared drive）, the applying date is
2011.6.17 Chinese patent application divisional application.
Technical field
The present invention relates to Data Interchange Technology, more particularly to a kind of method and apparatus for transmitting shared drive.
Background technology
Traditional local memory transfer mode is generally limited only to the inside of a process, is because operating system
To run on the virtual memory space that process therein provides be identical by each, and between virtual memory and physical memory
Mapping completely by operating system control, program process can only access actual storage in physics by virtual memory address
Data in depositing.As can be seen here, even identical virtual memory address, the corresponding physical memory in different processes
Can also be entirely different, therefore data can not be transmitted by local memory between different processes.
In order to improve the efficiency of Data Exchange, simplify the flow of interprocess communication, most of operating systems all can
The inter-process communication mechanisms of shared drive are provided.Described shared drive is not to mark off what is come from the internal memory of a certain process,
But one piece of region of memory that can be shared for multiple processes is opened up in the physical memory of system, because the internal memory of each process
Always privately owned, the purpose for setting up shared drive is desirable to each process for accessing it and connects it, and this connection procedure is referred to as
Mapping.System distributes the local memory address of each process when setting up shared drive to shared drive, each process it is local
Memory address may be connected to corresponding shared drive.Shared drive is respectively mapped to each process respective local
Memory headroom, so as to realize the data exchange based on shared drive between multiple processes.
Fig. 1 is transmits the schematic diagram of shared drive in the prior art, as shown in Figure 1：There are two processes in same system
（Process A and process B）It is currently running, wherein process A is expected that by access shared drive and process B information is called to realize,
In this case, process A can be referred to as caller process, and process B can be referred to as callee process.Specifically, process A
Calling process B method is as follows：
Step 1：Process A applies for a shared drive；
Step 2：System specifies a shared drive keyword according to process A application（0X00）Set up shared drive
(0X00), and process A and process B are informed by certain mode；
In this step, shared drive keyword can be informed process A and process B by system in the following way：
When A, system use special file with anonymous way establishment shared drive, operating system will be shared by special file
Internal memory keyword（0X00）Process A and process B are informed, still, this mode is typically only applicable to have akin process
Between.For example, first calling mmap functions in parent process, fork functions are recalled, then after parent process calls fork functions,
Subprocess inherits the local memory address after parent process anonymity mapping；
B, system can also specify same public head file, the public head file in the command line parameter of compiler
Include shared drive keyword（0X00）, and process A and process B are informed simultaneously, it is still, shared interior with one in keyword
Deposit in the case of being combined, any operation for attempting to create shared drive of the same name can all fail, and now, system must handle this
Failure, deletes existing shared drive, then again attempts to create so that flow is more complicated, and may need repeatedly to taste
Examination；
In order to solve the problems, such as shared drive of the same name, process A and process B arrange a pathname and item id（One between 0
Character value between to 255）, process A calls fork functions, and the two values are transformed into a keyword, and system is closed according to this
Key word creates shared drive；But, this mode is typically only capable to be applied to class UNIX operating system, and is only limitted to the road of system
Footpath and item id are known；
Step 3：Process A is shared drive（0X00）Connection（Map）To the local memory address of oneself（That is process A's
Local memory address 0X003D2C8）；Process B is shared drive（0X00）Mapping（Connect）To the local memory address of oneself
（That is process B local memory address 0X0024C28）, shared drive is based between process A and process B so as to realize（0X00）'s
Data exchange.
From technical scheme disclosed in above-mentioned prior art, it can be seen that system not only needs when creating shared drive
Rely on special file system, it is possible to there is the situation that shared drive creates failure, meanwhile, process A and process B must lead to
Cross shared drive keyword to merge with shared drive, then shared drive is mapped to respective local memory address, process CIMS
Complexity, is easily caused the asynchronism of shared drive data exchange between process.And the asynchronism of this Data Exchange
It is because the disunity of local memory data exchanged form is caused in shared drive data exchange and process between process.
The content of the invention
In view of this, the embodiments of the invention provide a kind of method and apparatus for transmitting shared drive, process can be realized
Between in shared drive and process both data exchange ways of local memory unification, shared drive data exchange between raising process
Synchronism.
To achieve the above object, the embodiment of the present invention is adopted the following technical scheme that.
A kind of method for transmitting shared drive, including：
Call function is created shared drive using the local memory address of caller process as keyword and is total to described
Internal memory keyword is enjoyed for parameter constructor call statement；
Described function call sentence is sent to callee process, so that callee process analytical function calls language
Sentence obtains shared drive.
The embodiment of the present invention additionally provides a kind of device for realizing transmission shared drive method, applied to caller process
Side, including：
First module, shared drive is created using the local memory address of caller process as keyword for call function
And using described shared drive keyword as parameter constructor call statement；
Second module, for described function call sentence to be sent into callee process, for callee process
Analytical function call statement obtains shared drive.
The embodiment of the present invention additionally provides a kind of device for realizing transmission shared drive method, applied to callee process
Side, including：
First module, for receiving the function call sentence from caller process, wherein the function call sentence
Building mode is：Call function creates shared drive using the local memory address of caller process as keyword and with described
Shared drive keyword builds for parameter；
Second module, shared drive is obtained for analytical function call statement.
The embodiment of the present invention is created in shared by call function directly by shared drive keyword of local memory address
Deposit, the uniformity of shared drive keyword and local memory address is kept in this way, makes created shared drive can
It is connected with the local memory directly with caller process, caller process need not be according to shared drive keyword and shared drive
It can merge and shared drive is mapped to local memory, so that it is transparent between caller process local memory and shared drive, this
Ground internal storage data content can be copied directly to shared drive；
Meanwhile, the embodiment of the present invention calls language further through call function using shared drive keyword as parameter constructor
Sentence, and function call sentence is sent to callee process for its acquisition shared drive so that callee process is locally interior
Deposit access and be subject to unification in function interface aspect with shared internal storage access；
Therefore, technical scheme provided in an embodiment of the present invention can ensure between process the transmission data mode of shared drive and
The unification of the transmission data mode of local memory, simplifies the flow of data exchange in process, improves the synchronization of data exchange
Property.
Brief description of the drawings
Fig. 1 is the schematic diagram for transmitting shared drive in the prior art；
Fig. 2 is the method flow diagram of transmission shared drive in the embodiment of the present invention；
Fig. 3 is the schematic diagram of transmission shared drive in the embodiment of the present invention；
Fig. 4 is the method flow diagram of transmission shared drive in the embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is done further below in conjunction with the accompanying drawings
Detailed description.
In order to realize the unification of the data mode of local memory in shared drive and process between process, the embodiment of the present invention is carried
A kind of method of the transmission shared drive supplied, is specifically included：The local memory address of call function using caller process is used as pass
Keyword creates shared drive and using described shared drive keyword as parameter constructor call statement；Described function is adjusted
Callee process is sent to sentence, so that callee process analytical function call statement obtains shared drive, so that real
Data exchange between existing process.
Fig. 2 is a kind of method flow diagram for transmitting shared drive provided in an embodiment of the present invention；As shown in Fig. 2 this method
Including：
Step 201：Caller process call function creates shared drive using local memory address as keyword；
Described function includes shmat, and shmdt, shmget, shmctl etc. can create the function of shared drive；It is described
Local memory address can be caller process textual form local memory address；Described shared drive is to be
An application heap that can be shared for multiple processes is set up in system physical memory；
In this step, caller process creates shared drive by keyword of local memory address using function, is created
The shared drive built can be directly with caller process local memory be connected, caller process need not be closed according to shared drive
Keyword can merge with shared drive is mapped to local memory by shared drive, so that caller process local memory is interior with sharing
It is transparent between depositing.
Step 202：Caller process call function calls language using described shared drive keyword as parameter constructor
Sentence, and it is sent to callee process by inter-process communication mechanisms；
Here, it is pointed out that：Goal of the invention just because of the present invention is to ensure that shared drive and local memory
The uniformity of address, so that the data directly invoked by function in shared drive are realized, and local memory data is handed in process
Change is directly to be realized by the data of function call local memory, then only by call function with caller process
Local memory address creates shared drive as keyword, just can guarantee that local memory data is exchanged between process altogether in process
Enjoy the unification of internal storage data exchanged form.If caller process sets up shared drive using non-functional mode, although Ke Yishi
The establishment of existing shared drive, but be due to that follow-up shared drive keyword can not be transmitted directly to be called by functional form
Person's process, but caller process must inform callee process by other pipelines, so cause caller process in wound
Build that shared drive is asynchronous with transmission shared drive keyword, so cause that callee process and shared drive merge it is stagnant
Afterwards.
Step 203：The shared drive keyword that callee process is provided according to function call statement parameter with it is shared in
Congregation is deposited, the information of shared drive is obtained（Described information includes shared drive name and/or address）, pass through shared drive information
Obtain shared drive.
Step 204：Shared drive is mapped to the local memory address of callee process by callee process.
Step 205：Callee process performs the letter that callee process is locally called according to function call sentence
Number, and implementing result is write into shared drive and function return statement, function return statement is returned by inter-process communication mechanisms
Return to caller process.
Step 206：Caller process will be returned in shared drive by the data content direct copying that callee process updates
Local memory.
Above-mentioned steps constitute once shared drive data exchange process between complete process, and citing below further illustrates this
The embodiment of invention, Fig. 3 is the schematic diagram of transmission shared drive in the embodiment of the present invention, as shown in figure 3, caller enters
Journey is in order that the part of functions provided with callee process, first calls a local function, the function is with local memory
Address 01AA0314 is that keyword sets up shared drive 01AA0314, and local memory data content is copied into shared drive,
Meanwhile, the function passes through interprocess communication machine again using shared drive keyword 01AA0314 as parameter constructor call statement
System passes to callee process, and callee process analytical function call statement therefrom obtains shared drive name, and will altogether
Enjoy internal memory and be mapped to callee process local memory address, hereafter will access to enter with caller as accessing local memory
The shared memory headroom of journey.
Specifically, the implementation process of this method is as shown in Figure 4：
Step 401：Caller process calls local shmat functions；
Step 402：The character string 01AA0314 of described shmat functions using caller process local memory address is used as pass
Key word creates shared drive 01AA0314, and caller process directly can copy to the data content in local memory in shared
In depositing；
Step 403：Described shmat functions are adjusted by parameter constructor of described shared drive keyword 01AA0314
With sentence, described function call sentence is sent to callee process by inter-process communication mechanisms；
Step 404：Callee process receives the function call sentence from caller process, is adjusted according to described function
The keyword 01AA0314 of shared drive is parsed with statement parameter 01AA0314；
Step 405：Callee process is merged by described shared drive keyword 01AA0314 and shared drive, is obtained
To shared drive name 01AA0314；
Step 406：Shared drive 01AA0314 with being mapped to the local memory of callee process by callee process
Location 0001E98；
Step 407：The locally called function of callee process is performed, the called function enters with caller
The function that journey is called is corresponding, can include shmat functions or other corresponding functions；
Step 408：Implementing result is write shared drive 01AA0314 by the called function, and constructor is returned
Sentence, caller process is passed to by inter-process communication mechanisms；
Step 409：Caller process will be returned in shared drive by the data content direct copying that callee process updates
Local memory.
The technical scheme that the present invention is provided is compared to the method tool that data are transmitted between other processes by Sharing Memory Realization
There is significant advantage：
Caller process establishment shared drive directly by shared drive keyword of local memory address using function, can be with
The uniformity of shared drive keyword and local memory address is kept, created shared drive is directly entered with caller
The local memory connection of journey, caller process need not can merge shared drive according to shared drive keyword with shared drive
Local memory is mapped to, so that transparent between caller process local memory and shared drive, local memory data content can
To be copied directly to shared drive；
Meanwhile, caller process uses function that shared drive keyword is concurrent as parameter constructor call statement again
Callee process is given, the keyword of shared drive is transmitted by function call sentence so that local memory is accessed with sharing
Internal storage access is subject to unification in function interface aspect.
As can be seen here, the technical scheme that provides of the present invention can ensure between process the transmission data mode of shared drive and enter
The unification of the transmission data mode of local memory, simplifies the flow of data exchange in journey, improves the synchronism of data exchange.
The embodiment of the present invention additionally provides a kind of device for transmitting shared drive, applied to caller process side, including：
First module, shared drive is created using the local memory address of caller process as keyword for call function
And using described shared drive keyword as parameter constructor call statement；
Second module, for described function call sentence to be sent into callee process, for callee process
Analytical function call statement obtains shared drive.
The device further comprises：
3rd module, for user will to be adjusted back by the data content direct copying that callee process updates in shared drive
The local memory address of process.
The embodiment of the present invention additionally provides a kind of device for transmitting shared drive, applied to callee process side, including：
First module, for receiving the function call sentence from caller process, wherein the function call sentence
Building mode is：Call function creates shared drive using the local memory address of caller process as keyword and with described
Shared drive keyword builds for parameter；
Second module, shared drive is obtained for analytical function call statement.
Second module includes：
First module：Parameter for analytical function call statement therefrom obtains shared drive keyword；
Second unit：For shared drive keyword and shared drive to be merged, and shared drive is mapped to called
The local memory address of person's process.
The device further comprises：
3rd module：Called for function implementing result to be write into shared drive, and returned to by function return statement
Person's process.
Presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.It is all the present invention
Within spirit and principle, any modification, equivalent substitution and improvements done etc. should be included in the scope of the protection.
Claims (6)
1. a kind of method for transmitting shared drive, it is characterised in that：
Call function is created shared drive using the local memory address of caller process as keyword and shares interior with described
Keyword is deposited for parameter constructor call statement, the local memory address of the caller process is the internal memory of textual form
Address；
Described function call sentence is sent to callee process, so that callee process analytical function call statement is obtained
Take shared drive；
Callee process performs the function that callee process is locally called, and will perform knot according to function call sentence
Fruit write-in shared drive, caller process is returned to by function return statement；
Caller process will adjust back user's process in shared drive by the data content direct copying that callee process updates
Local memory address.
2. according to the method described in claim 1, it is characterised in that the callee process analytical function call statement is obtained
Shared drive includes：
The parameter of callee process analytical function call statement therefrom obtains shared drive keyword；
Shared drive keyword and shared drive are merged, and shared drive is mapped to the local memory of callee process
Location.
3. a kind of device for transmitting shared drive, it is characterised in that applied to caller process side, including：
First module, created for call function using the local memory address of caller process as keyword shared drive and with
Described shared drive keyword is parameter constructor call statement, and the local memory address of the caller process is text
The memory address of change form；
Second module, for described function call sentence to be sent into callee process, so that callee process is parsed
Function call sentence obtains shared drive；
3rd module, for user's process will to be adjusted back by the data content direct copying that callee process updates in shared drive
Local memory address.
4. a kind of device for transmitting shared drive, it is characterised in that applied to callee process side, including：
First module, for receiving the function call sentence from caller process, wherein the structure of the function call sentence
Mode is：Call function is created shared drive using the local memory address of caller process as keyword and shared with described
Internal memory keyword builds for parameter, and the local memory address of the caller process is the memory address of textual form；
Second module, shared drive is obtained for analytical function call statement.
5. device according to claim 4, it is characterised in that second module includes：
First module：Parameter for analytical function call statement therefrom obtains shared drive keyword；
Second unit：For shared drive keyword and shared drive to be merged, and shared drive is mapped into callee to enter
The local memory address of journey.
6. the device according to claim 4 or 5, it is characterised in that further comprise：
3rd module：For function implementing result to be write into shared drive, and caller is returned to by function return statement to enter
Journey.
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| CN201310446221.7A CN103995736B (en) | 2011-06-17 | 2011-06-17 | A kind of method and apparatus for transmitting shared drive |
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| CN201310446221.7A CN103995736B (en) | 2011-06-17 | 2011-06-17 | A kind of method and apparatus for transmitting shared drive |
| CN201110164503.9A CN102253855B (en) | 2011-06-17 | 2011-06-17 | A kind of method and apparatus transmitting shared drive |
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| CN104318476B (en) * | 2014-11-06 | 2019-04-26 | 中国建设银行股份有限公司 | A kind of information processing method and device |
| CN109426571B (en) * | 2017-08-28 | 2022-05-13 | 阿里巴巴集团控股有限公司 | Method, system, storage medium, processor and apparatus for function call and data access |
| CN115119048B (en) * | 2019-08-10 | 2024-02-23 | 荣耀终端有限公司 | Video stream processing method and electronic equipment |
| CN111125070A (en) * | 2019-11-19 | 2020-05-08 | 华迪计算机集团有限公司 | Data exchange method and platform |
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| US7376860B2 (en) * | 2004-12-16 | 2008-05-20 | International Business Machines Corporation | Checkpoint/resume/restart safe methods in a data processing system to establish, to restore and to release shared memory regions |
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| CN1811717A (en) * | 2006-01-10 | 2006-08-02 | 杭州东信灵通电子实业公司 | Universal interprocess communication achieving method |
| JP2009065713A (en) * | 2008-12-08 | 2009-03-26 | Ricoh Co Ltd | Image forming apparatus, shared memory arbitrating method, program and recording medium |
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