JP4295072B2 - Communication port assignment device, communication port assignment method, and communication port assignment program - Google Patents

Description

  The present invention relates to a technology for registering a communication device to a Windows CE (US, Microsoft trademark) -based platform, and more particularly to a communication port allocation device and communication port for flexibly allocating / releasing communication ports specified by a prefix and an index. The present invention relates to an allocation method and a communication port allocation program.

  WindowsCE is an OS developed by Microsoft Corporation that is designed to be incorporated into devices that are supposed to be carried. First, prefix and index terms in Windows CE will be described.

  In Windows CE, a device file name (hereinafter referred to as a communication port) is defined in order to present and relate a device driver interface function to a device. The communication port is composed of three English letters, one number, and one colon. Three English characters constituting a communication port are a prefix (Prefix), and one number is an index (Index), and the communication port is specified by the prefix and the index. For example, in the case of a communication port “COM1:”, the prefix is COM and the index is 1.

  In Windows CE, there are a plurality of prefixes such as COM, FJF, and FJH. Further, in the specification of Windows CE, a total of ten indexes 1, 2, 3,..., 9, 0 can be assigned to one prefix.

  FIG. 8 is a diagram showing a Windows CE driver stack chart. In FIG. 8, 3 is a registry in which system information is registered, 20 is a device such as a PC card or USB, 21 is a PC card socket driver installed in an OS (Windows CE), a lower level driver such as a USB host controller driver, 22 Is a client driver, 23 is a TAPI (telephony API) implemented in an OS (Windows CE), 24 is a dial-up application, and 25 is a general application. TAPI is an application interface for using a telephone function on a computer.

  In Windows CE, information such as a prefix name, an index name, and a device driver name is managed in the registry 3 for each ID (vendor ID / product ID) of the device 20. By referring to this registry information, the device driver name, prefix name, and index name corresponding to the selected device 20 can be known.

  The following processing is performed during communication. For example, when the modem name is specified by the dial-up application 24 and COM OPEN (communication operation is started), the prefix and index corresponding to the selected modem name are acquired from the registry 3 and COM is opened.

  On the other hand, when a general application 25 (for example, a terminal application) directly designates COM and performs an OPEN, since the prefix and index are already determined, the COM is OPENed using them. Then, the stream interface function implemented in the device driver is called to start communication.

  It should be noted that there is no particular document described regarding the prior art focusing on the problems to be solved by the present invention described later.

  However, in the past, when all prefix indexes were assigned when the device was used (plug-in), there was no function for selectively assigning a single prefix or multiple prefixes and indexes.

  For example, when an index with an index number of 1 to 9 is assigned to a certain prefix and only an index with index number = 0 is available, a plurality of devices 20 are connected to an apparatus (for example, a PDA) equipped with Windows CE. When inserted, prefixes and indexes could not be assigned to the plurality of devices 20. For this reason, the plug-in of the device 20 is rejected.

  Conventionally, there is no function for releasing an index assigned to a prefix when the device 20 is not used (plug-out). As a result, the index might run out.

  The present invention solves the above-mentioned problems of the prior art. When all prefix indexes are assigned at the time of plug-in, a single or plural prefixes and indexes are selectively assigned, and at the time of plug-out, the prefix is assigned. The purpose is to avoid plug-in rejection and index exhaustion by providing a means to release the index.

In order to solve the above problems, the present invention executes the following processing.
(1) When all prefix indexes are assigned when a device is used (plug-in), a function of selectively assigning a single prefix and index is installed to avoid rejection of the plug-in of the device 20.
(2) When all prefix indexes are assigned when the device is used (plug-in), a function of selectively assigning a plurality of prefixes and indexes is installed to avoid rejection of the plug-in of the device 20.
(3) By using a function to release the index assigned to the prefix when the device is not used (plug-out), index depletion is avoided.

  That is, the present invention relates to a communication port assigning device for assigning a communication port specified by a prefix and an index in a device driver for a computer having a predetermined operating system to access the device, and the device is inserted into the computer. When receiving a plug-in notification from the operating system, searching for an index for each specific prefix registered in the registry and extracting a free index, and when there are a plurality of preset indexes The number of extracted free indexes and the number of indexes assigned to the inserted device are compared under the condition indicating whether or not to permit multiple prefix assignment, and one or more prefixes are assigned. Assign indices from the free index, wherein the value of the assigned prefix and index and means for writing to the registry.

  Further, the present invention provides the communication port assignment apparatus, wherein when the device is removed from the computer, a plug-out notification is received from the operating system, and the prefix / index pair assigned at the time of the plug-in is stored in the registry. It is characterized by comprising means for deleting from.

  The processing functions of the communication port assignment device described above can be realized by a computer and a software program, and the program can be provided by being recorded on a computer-readable recording medium or provided via a network. .

  According to the present invention, even if all prefix indexes are assigned when a device is used (plug-in), it is possible to selectively assign a single prefix or multiple prefixes and indexes, thereby avoiding rejection of a device plug-in. It becomes possible to do.

  Furthermore, according to the present invention, since the index assigned to the prefix can be released when the device is not used (plug out), it is possible to avoid exhaustion of the index.

  FIG. 1 is a diagram showing a configuration of a communication port assignment apparatus according to the present invention. In FIG. 1, 1 is a communication port assignment device, and 2 is an OS such as Windows CE. The communication port assignment device 1 is provided in the client driver 22 shown in FIG. The registry 3 includes, for example, registry information including elements such as a device name, a device driver name corresponding to the device name, a prefix name, and an index name.

  In the communication port allocation device 1, 11 is a plug-in processing unit, 12 is a prefix / index allocation processing unit, 121 is an empty index search processing unit, 13 is an index number comparison processing unit, 14 is a storage unit by a storage device, and 15 is A plug-out processing unit 16 is a prefix / index release processing unit. In the storage unit 14, 141 is an empty index storage table, 142 is an assigned index storage table, and 143 is a comparison result storage table.

  The plug-in processing unit 11 receives a plug-in notification from the OS 2 when the device 20 is inserted into a device (for example, a PDA) equipped with the OS 2 such as Windows CE, and then sends a plug-in event to the free index search processing unit 121. To be notified.

  The free index search processing unit 121 searches a specific prefix index registered in the registry 3 and extracts a free index. The result is stored in the free index storage table 141. Further, the prefix / index allocation processing unit 12 writes the prefix and index values into the registry 3 based on the information in the comparison result storage table 143.

  The index number comparison processing unit 13 compares the contents of the assigned index storage table 142 and the free index storage table 141 and stores the result in the comparison result storage table 143. The storage of the comparison result in the comparison result storage table 143 will be described later.

  As shown in FIG. 2, the allocation index storage table 142 includes, for each prefix, the number of indexes (Index_Num) and a flag (Across: 0 (non-permitted) / 1 (permitted)) and the priority order (Priority: the smaller the value, the higher the priority order) of the prefix to be assigned is stored.

  For example, in the case of the allocation index storage table 142 shown in FIG. 2A, since the number of indexes of the prefix “COM” is 2 and the Across value is “0”, multiple prefixes are allocated when there are multiple indexes. Since the priority value is “1”, it can be seen that the highest priority is given.

  In addition, since the number of indexes of the prefix “FJF” is 2 and the Across value is “1”, a plurality of prefixes can be assigned when there are a plurality of indexes, and the second value because the Priority value is “2”. It can be seen that the priority is high.

  Further, since the number of indexes of the prefix “FJH” is 2 and the Across value is “1”, multiple prefixes can be assigned when there are a plurality of indexes, and the priority value is “3”. It can be seen that the priority is low.

  As shown in FIG. 3, the free index storage table 141 is a table showing which free index (assignable index) is out of a total of 10 indexes from 1 to 0 for each prefix. In the free index storage table 141 shown in FIG. 3, “0” indicates an occupied index, and “1” indicates a free index.

  The comparison result storage table 143 is a table in which a comparison result between the allocation index storage table 142 and the contents of the free index storage table 141 is stored. In the comparison result storage table, as shown in FIG. 4, the occupied state (0: occupied / 1: free) of a total of 10 indexes from 1 to 0 for each prefix is shown.

  The plug-out processing unit 15 receives a plug-out notification from the OS 2 when the device 20 (USB / PC card or the like) is removed from a device (PDA or the like) storing the OS 2 such as Windows CE, and then releases the prefix / index. The plug-in event is notified to the processing unit 16.

  The prefix / index release processing unit 16 acquires one assigned prefix / index pair from the information in the comparison result storage table 143, and deletes the acquired prefix / index from the registry 3.

  FIG. 5 is a diagram showing an outline of the processing flow of the present invention. First, plug-in processing of the device 20 is performed (step S1). For example, when a device 20 such as a PC card or USB is inserted into a device (for example, a PDA) equipped with OS2 such as Windows CE, the OS2 detects the device 20 with the lower driver 21, and the necessary information (from the device 20) For example, the device ID) is acquired.

  The lower-level driver 21 of the OS 2 refers to the registry information using the ID of the device 20 as a search condition, and calls the driver name (client driver 22) corresponding to the inserted device 20. Specifically, the communication port assignment device 1 of the present invention included in the client driver 22 is called. Next, communication ports are allocated flexibly. That is, the communication port assignment apparatus 1 selectively assigns a single or plural prefixes and indexes (step S2), and puts the device into a use state (step S3).

  When the lower driver 21 of the OS 2 detects the plug-out of the device 20 (step S4), the communication port assignment device 1 releases the assigned communication port (step S5). That is, the assigned prefix / index pair is deleted from the registry 3.

  FIG. 6 is a diagram showing an example of the communication port assignment processing flow of the present invention. First, the plug-in processing unit 11 receives a notification indicating that the device 20 has been plugged in from the OS 2 (step S11). The plug-in processing unit 11 activates the empty index search processing unit 121 (step S12). The free index search processing unit 121 determines whether all prefixes have been extracted (step S13). If all prefixes have been extracted, the process proceeds to step S19.

  When there is a prefix that has not been extracted, the free index search processing unit 121 extracts a prefix from the prefix column of the assigned index storage table 142 (step S14), and searches for the corresponding prefix from the registry 3 (step S15). . Next, it is determined whether a prefix has been found (step S16). If a prefix is found, the index value is extracted, and the free index search processing unit 121 writes the result in the free index storage table 141 (step S17). ).

  In the free index storage table 141, for example, as shown in FIG. 3, which of 10 indexes from 1 to 0 for each prefix is a free index (index that can be allocated) is written.

  In the case of the example of FIG. 3, for example, a free index with a prefix “COM” is an index with index number = 0, and a free index with a prefix “FJF” is 7 indexes with index numbers 4 to 0. For the prefix “FJH”, it can be seen that ten indexes with index numbers 1 to 0 are empty.

  Next, it is determined whether all the registries 3 have been searched (step S18). If all the registries 3 have been searched, the process returns to step S13, and if any registries 3 have not been searched, the process returns to step S15.

  When all the prefixes have been extracted in step S13, the index number comparison processing unit 13 is activated and acquires the assigned index storage table 142 (step S19). Then, a prefix that has not been acquired and that has a small Priority value is acquired, and the Across value and Index_Num value of the prefix are acquired (step S20).

  For example, if the allocation index storage table 142 is in the state as shown in FIG. 2A, the prefix “COM” having the smallest Priority value is acquired, and the Across value “0” and the index_Num value “2” are acquired. Is acquired.

  Next, the number of free indexes of the corresponding prefix is acquired from the free index storage table 141, and the Index_Num value is compared with the number of free indexes (step S21). It is determined whether the number of free indexes is larger than the Index_Num value (step S22). If the number of free indexes is not larger than the Index_Num value, it is determined whether the Across value is “1” (permitted) (step S23).

  For example, the Index_Num value “2” of “COM” acquired from the assigned index storage table 142 shown in FIG. 2A is larger than the number of free indexes “1” of “COM” shown in FIG. It is determined whether it is “1” (permitted).

  If the Across value is not “1” (permitted), it is determined whether all prefixes have been acquired (step S24). If there is a prefix that has not been acquired, the process returns to step S20, and all prefixes have been acquired. In this case, a result that cannot be assigned (0: occupied) is written in the comparison result storage table 143 (step S25).

  For example, in the assignment index storage table 142 shown in FIG. 2A, since the “Across” value of “COM” is “0”, the process proceeds to step S24, and unsearched prefixes (“FJF” and “FJH”) are found. Therefore, the process returns to step S20, and the prefix “FJF” having the smallest Priority value after “COM” is acquired.

  In step S22, if the number of empty indexes is larger than the Index_Num value, “1” is substituted for the Index_Num value in ascending order of the free index number of the corresponding prefix in the comparison result storage table 143, and “0” is substituted otherwise ( Step S26).

  For example, as shown in the free index storage table 141 in FIG. 3, the number of free indexes with the prefix “FJF” is “7” with index numbers 4 to 0, and the assigned index storage shown in FIG. In Table 142, since the Index_Num value of the prefix “FJF” is “2”, it is determined that the number of empty indexes is larger than the Index_Num value, and the process proceeds to Step S26.

  For example, among the free indexes for the prefix “FJF”, “1” is assigned to the index number 4 and the index number 5 in the comparison result storage table 143 in ascending order of the index number, “0” is assigned to other indexes. As a result of the above processing, the comparison result storage table 143 is written as shown in FIG.

  Next, the prefix / index allocation processing unit 12 writes the prefix and index corresponding to “1” in the comparison result storage table 143 to the registry 3 corresponding to the device 20 (step S27).

  If the Across value is “1” (permitted) in step S23, “1” is substituted for the number of (Index_Num value−number of free indexes) in ascending order of the free index number of the corresponding prefix in the comparison result storage table 143. (Step S28), the process proceeds to Step S29.

  For example, if the allocation index storage table 142 shown in FIG. 2B is acquired in step S19, the Across value of the prefix “COM” acquired in step S20 is “1” (permitted). Accordingly, in step S 28, “1” is assigned to (Index_Num value−number of empty indexes) = 2-1 = 1 for the index with index number = 0 of “COM” in the comparison result storage table 143. The

  Then, the value of (Index_Num value−number of empty indexes) is substituted into the Index_Num value (step S29), and the process returns to step S20. In the above example, (Index_Num value−number of empty indexes) = 2-1 = 1 is substituted into the Index_Num value.

  The number of free indexes of the prefix “FJF” acquired after returning to step S20 is “7”, for example, as shown in the free index storage table 141 of FIG. In addition, since Index_Num value = 1 assigned in step S29, the number of empty indexes is larger than the Index_Num value. Accordingly, the process proceeds to step S26, and “1” is assigned to the index of index number = 4 having the smallest index number among the free indexes for the prefix “FJF” in the comparison result storage table 143. As a result of the above processing, the comparison result storage table 143 is written as shown in FIG. 4B, for example.

  FIG. 7 is a diagram showing an example of the communication port release processing flow of the present invention. First, the plug-out processing unit 15 receives a notification indicating that the device 20 has been plugged out from the OS 2 (step S31).

  The plug-out processing unit 15 activates the prefix / index release processing unit 16 (step S32). The prefix / index release processing unit 16 acquires a pair of prefix and index assigned from the comparison result storage table 143 (step S33).

  It is determined whether one prefix / index pair has been acquired (step S34). If one prefix / index pair cannot be acquired, the process ends. If one prefix / index pair has been acquired, the prefix The index release processing unit 16 searches for a corresponding prefix and index from the registry 3 (step S35).

  It is determined whether or not the corresponding prefix and index are found (step S36). If no corresponding prefix and index are found, the process returns to step S33. If the corresponding prefix and index are found, prefix / index release processing is performed. The unit 16 deletes the prefix and index values from the registry 3 (step S37), and returns to step S33.

  In the above embodiment, an example of a device equipped with Windows CE as an operating system has been described. However, the present invention is not limited to Windows CE, and is similar to any OS that handles device drivers that perform similar prefix and index assignment. Can be implemented. As can be understood from the above, the features of the embodiment of the present invention are described as follows.

(Supplementary Note 1) A communication port assignment apparatus for assigning a communication port specified by a prefix and an index in a device driver for a computer having a predetermined operating system to access a device,
Means for receiving a plug-in notification from the operating system when a device is inserted into the computer, searching an index for each specific prefix registered in the registry, and extracting a free index;
The number of extracted free indexes is compared with the number of indexes allocated to the inserted device under a condition indicating whether or not to permit multiple prefix assignment when there are a plurality of preset indexes. Or a means for allocating an index from free indexes in a plurality of prefixes, and writing the allocated prefix and index values in the registry.

(Supplementary Note 2) In the communication port assignment device described in Supplementary Note 1,
A communication port allocation device comprising: means for receiving a plug-out notification from the operating system when a device is removed from the computer, and deleting a prefix and index pair allocated at the time of plug-in from the registry. .

(Supplementary Note 3) A communication port assigning device for assigning a communication port specified by a prefix and an index in a device driver for a computer having a predetermined operating system to access a device,
Plug-in processing means for receiving a plug-in notification from the operating system when a device is inserted into the computer;
A free index search processing means for receiving a plug-in event from the plug-in processing means, searching for an index for each specific prefix registered in the registry, extracting a free index, and storing the extraction result in a free index storage table; ,
For each prefix, compare the contents of the assigned index storage table in which the number of indexes and the flag indicating whether or not to assign multiple prefixes when there are a plurality of indexes are stored with the contents of the empty index storage table, Index number comparison processing means for storing index information to which comparison results can be assigned in a comparison result storage table;
A communication port allocation apparatus comprising: prefix / index allocation processing means for writing prefix and index values to the registry based on information in the comparison result storage table.

(Supplementary Note 4) In the communication port assignment device described in Supplementary Note 3,
Plug-out processing means for receiving a plug-out notification from the operating system when a device is disconnected from the computer;
Prefix / index release processing that receives a plug-out event from the plug-out processing means, acquires a prefix / index pair assigned from the information in the comparison result storage table, and deletes the acquired prefix / index from the registry A communication port assignment device.

(Supplementary Note 5) A communication port assignment method for assigning a communication port specified by a prefix and an index in a device driver for a computer having a predetermined operating system to access a device,
Receiving a plug-in notification from the operating system when a device is inserted into the computer, searching an index for each specific prefix registered in the registry, and extracting a free index;
The number of extracted free indexes is compared with the number of indexes allocated to the inserted device under a condition indicating whether or not to permit multiple prefix assignment when there are a plurality of preset indexes. Or assigning an index from free indexes in a plurality of prefixes, and writing the assigned prefix and index values to the registry.

(Appendix 6) In the communication port assignment method described in Appendix 5,
Receiving a plug-out notification from the operating system when a device is removed from the computer, and deleting a prefix and index pair assigned at the time of plug-in from the registry. Method.

(Supplementary note 7) Communication port assignment program for causing a computer to execute a communication port assignment method for assigning a communication port specified by a prefix and an index in a device driver for a computer having a predetermined operating system to access the device Because
A plug-in processing step of receiving a plug-in notification from the operating system when a device is inserted into the computer;
A free index search processing step of searching for an index for each specific prefix registered in the registry by receiving the plug-in notification, extracting a free index, and storing the extraction result in a free index storage table;
For each prefix, compare the contents of the assigned index storage table in which the number of indexes and the flag indicating whether or not to assign multiple prefixes when there are a plurality of indexes are stored with the contents of the empty index storage table, An index number comparison processing step for storing index information to which comparison results can be assigned in a comparison result storage table;
A prefix / index allocation processing step of writing prefix and index values to the registry based on the information of the comparison result storage table;
A communication port assignment program to be executed by a computer.

(Appendix 8) In the communication port assignment program described in Appendix 7,
A plug-out processing step of receiving a plug-out notification from the operating system when a device is disconnected from the computer;
A prefix / index release processing step of acquiring a prefix / index pair assigned from the information of the comparison result storage table by receiving the plug-out notification and deleting the acquired prefix / index from the registry;
A communication port assignment program including a program for causing a computer to execute.

It is a figure which shows the structure of the communication port allocation apparatus of this invention. It is a figure which shows an example of an allocation index storage table. It is a figure which shows an example of an empty index storage table. It is a figure which shows an example of a comparison result storage table. It is a figure which shows the outline | summary of the processing flow of this invention. It is a figure which shows an example of the communication port allocation processing flow of this invention. It is a figure which shows an example of the communication port release process flow of this invention. It is a figure which shows the driver stack chart of WindowsCE.

Explanation of symbols

1 Communication port assignment device 2 Operating system (OS)
3 Registry 11 Plug-in Processing Unit 12 Prefix / Index Assignment Processing Unit 13 Index Number Comparison Processing Unit 14 Storage Unit 15 Plug-Out Processing Unit 16 Prefix / Index Release Processing Unit 20 Device 21 Lower Level Driver 22 Client Driver 23 TAPI
24 dial-up application 25 general application 121 free index search processing unit 141 free index storage table 142 allocation index storage table 143 comparison result storage table

Claims (5)

A communication port assignment device for assigning a communication port specified by a prefix and an index in a device driver for a computer having a predetermined operating system to access a device,
Means for receiving a plug-in notification from the operating system when a device is inserted into the computer, searching an index for each specific prefix registered in the registry, and extracting a free index;
The number of extracted free indexes is compared with the number of indexes allocated to the inserted device under a condition indicating whether or not to permit multiple prefix assignment when there are a plurality of preset indexes. Or a means for allocating an index from free indexes in a plurality of prefixes, and writing the allocated prefix and index values in the registry. The communication port assignment device according to claim 1, further comprising:
A communication port allocation device comprising: means for receiving a plug-out notification from the operating system when a device is removed from the computer, and deleting a prefix and index pair allocated at the time of plug-in from the registry. . A communication port assigning method for assigning a communication port specified by a prefix and an index in a device driver for a computer having a predetermined operating system to access a device,
Receiving a plug-in notification from the operating system when a device is inserted into the computer, searching an index for each specific prefix registered in the registry, and extracting a free index;
The number of extracted free indexes is compared with the number of indexes assigned to the inserted device under a condition indicating whether or not to permit multiple prefix assignment when there are a plurality of preset indexes. Or assigning an index from free indexes in a plurality of prefixes, and writing the assigned prefix and index values to the registry. A communication port assignment program for causing a computer to execute a communication port assignment method for assigning a communication port specified by a prefix and an index in a device driver for a computer having a predetermined operating system to access the device,
A plug-in processing step of receiving a plug-in notification from the operating system when a device is inserted into the computer;
A free index search processing step of searching for an index for each specific prefix registered in the registry by receiving the plug-in notification, extracting a free index, and storing the extraction result in a free index storage table;
For each prefix, compare the contents of the assigned index storage table in which the number of indexes and the flag indicating whether or not to assign multiple prefixes when there are a plurality of indexes are stored with the contents of the empty index storage table, An index number comparison processing step for storing index information to which comparison results can be assigned in a comparison result storage table;
A prefix / index allocation processing step of writing prefix and index values to the registry based on the information of the comparison result storage table;
A communication port assignment program to be executed by a computer. The communication port assignment program according to claim 4, further comprising:
A plug-out processing step of receiving a plug-out notification from the operating system when a device is disconnected from the computer;
A prefix / index release processing step of acquiring a prefix / index pair assigned from the information in the comparison result storage table by receiving the plug-out notification and deleting the acquired prefix / index from the registry;
A communication port assignment program to be executed by a computer.

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