JPH0319061A - Input/output controller - Google Patents

Abstract

PURPOSE:To effectively use an output control work area and to attain the output of a large quantity of data in proportion to the size of the output control work area by using an input/output control means which gives an instruction to a data output program for output of the next data in response to a data output request. CONSTITUTION:An output control work area 3 is prepared to temporarily store the data to be outputted to an input/output device 9 together with an output buffer creation/deletion means 4 which creates and deletes the output buffers 31 and 32 within the area 3, an output data division/transfer means 5 which divides all data to be outputted via a data output program and transfers these divided data to both buffers 31 and 32, an output data transmission means 6 which transmits the data to the device 9, a next data output instruction informing means 7 which informs the next data output request to a data output program 8 from the device 9, and an input/output control means 2. As a result, the quantity of plural data that the output requests can be executed at one time can be increased by storing previously only the data to be outputted then.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is suitable for dividing and outputting data exceeding the limit for an input/output device where the amount of data that can be output at one time is limited. related to input/output control devices.

[Conventional technology]

Generally, when trying to output more data than the limit to an input/output device that has a limit on the amount of data that can be output at a time, the data is divided into the amount of data that can be output at one time to the input/output device. It is necessary to send out the amount of data that can be sent to the input/output device and sequentially output in response to the next data sending request from the input/output device. When performing such control,
Conventionally, all data that a data output program attempts to output to an input/output device is taken into an output control work area in the input/output control device, and the input/output control means transfers the data to the input/output device. The amount of data that can be output at one time is broken down and sent out sequentially in response to the next data sending request from the input/output device.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, when all data has been output to the input/output device, or when a request for output of new data to the same person's output device (a request from a program that previously outputted data to the input/output device) The remaining data to be output had to be saved in the output control work area until the output of the old data was stopped midway due to a request from another program (or a request from another program). Furthermore, if the input/output control means is equipped with a function that allows a request to retransmit data that has already been output as the next data transmission request from the input/output device, the data that has already been transmitted will also be sent. It had to be included and saved in the output control work area.

Therefore, if you try to process data output requests from multiple data output programs with one input/output control device, or if you try to control multiple input/output devices with one input/output control device, the output control There is a drawback that the limitation on the size of the area increases the degree of limitation on the number of data output programs that can make output requests at the same time and on the amount of data that can be output with one output request.

[Means to solve the problem]

The input/output control device described in the present invention has an output control work area where data to be output to the input/output device can be temporarily stored, and an output control work area that can output data to the input/output device at once. An output buffer creation/deletion means that creates and deletes an output buffer that can store up to 10 minutes of data, and outputs all the data that the data output program attempts to output at once to the input/output device. transport means for dividing and transporting the data into the output buffer; sending means for sending the data in the output buffer to the input/output device; and means for notifying the data output program of the next data output request from the input/output device. and an input/output control means that controls these means and makes it possible for the data output program to finally output all the data that it attempts to output to the input/output device.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

Referring to FIG. 1, an input/output control device 1 according to an embodiment of the present invention includes an output control work area 3 in which data to be output to an input/output device 9 can be temporarily stored;
Output buffer creation/deletion means 4 for creating and deleting output buffers 31 and 32 capable of storing data that can be output at one time to the input/output device 9 in the output control work area 3; Of all the data that the program attempts to output, the data that can be output at once to the input/output device 9 is divided and output.

output data division transfer means 5 for transferring data to buffers 31 and 32; output data sending means 6 for sending data in output buffers 31 and 32 to input/output device 9; Data output program 8
next data output instruction notification means 7 for notifying the next data output instruction, and input/output control that controls these means to enable the data output program to finally output all the data to be outputted to the input/output device 9. means 2.

The data output program 8 has data 81 to be output to the input/output device 9. On the other hand, the input/output device 9 has an output screen 91 having a capacity to output a certain amount of data at once.

The operation of outputting larger output data 81 due to the capacity of output screen 91 will now be described in detail.

The capacity of the output screen 91 is managed by the input/output control means 2. First, the data output program 8 outputs a request 5811 to the input/output control means 2 to the effect that it wants to output data to the input/output device 9. Upon receiving the request 5811, the input/output control means 2 requests the output buffer creation/deletion means 4 to create an output buffer 31 for storing data corresponding to the capacity of the output screen 91 in the output control work area 3. An instruction 5411 to create is output. Further, the input/output control means 2 returns a response 5812 for notifying the data output program 8 of the amount of data that can be stored in the output buffer 31. Upon receiving this, the data output program 8 divides the output data 81 according to the notified capacity and sends a transfer request 581 to the input/output control means 2 in order to transfer the output data 811 corresponding to the first output to the output buffer 31.
Outputs 3. In response to the transfer request 5813, the input/output control means 2 issues a transfer instruction 55 to the output data division transfer means 5.
11 is output and output data 81 is transferred to the output buffer 31. A transfer completion notification 551 indicates that the transfer has been completed.
The input/output control means 2 which learned in step 2 next issues a data transmission instruction 5611 to the output data transmission means 6 and outputs the data.
The data in NOA 31 is sent to the input/output device. The input/output control means 2, which has learned from the sending completion notification 5612 that the sending has been completed, issues an instruction 5412 to the output buffer creation/deletion means 4 to delete the output buffer 31. Up to this point, the output processing of the output data 811 has been completed.

Next, in response to the next data output request S91 from the input/output device 9, the input/output control means 2 outputs an instruction 5711 to the next data output instruction notification means 7.

In response to this instruction, the notification means 7 outputs a notification 5820 to the effect that an output request for the second output data has been input to the program 8.0 The data output program 8 that received the notification 5820 controls input/output. It outputs a request 5821 to the means 2 to perform the second output to the input/output device 9. Upon receiving the request 5821, the input/output control means 2 creates an output buffer in order to re-create the output cover and file 32 for storing data corresponding to the capacity of the output screen 91 in the output control work area 3. It outputs an instruction 5421 to that effect to the deletion means 4, and also outputs a response 5822 for notifying the data output program 8 of the amount of data that can be stored in the output buffer 32. The data output program 8 that received this divides the remaining output data again according to the notified capacity, and sends the output data 812 corresponding to the second output to the input/output control means 2 in order to transfer it to the output buffer 32. The transfer request 5823 is output. Upon receiving the transfer request 5823, the input/output control means 2 outputs a transfer instruction 5521 to the output data transfer means 5 to transfer the output data 812 to the output buffer 32.

When the transfer is completed, the output data transfer means 5 notifies the input/output control means 2 by a transfer completion notification 5522. Upon receiving the transfer completion notification 5522, the input/output control means 2 issues a data sending instruction 56 to the output data sending means 6.
21 to cause the data in the output buffer 32 to be sent to the input/output device 9. Since the output data sending means 6 notifies the input/output control means 2 of the completion of sending by sending completion notification 5622, the input/output control means 2 receiving the notification sends the output buffer 32 to the output buffer creation/deletion means 4. An instruction 5422 indicating deletion is output. This causes the output buffer 32 to be deleted. Output data 81 so far
This means that the second output process has been completed.

Thereafter, all of the output data 81 can be output to the input/output device 9 by following the same procedure.

〔Effect of the invention〕

The present invention enables efficient use of the output control work area by storing only data to be output at that time in the output control work area in the input/output control device. This allows a large amount of data to be output compared to the size of the output control work area. Further, even when data output processing from a plurality of programs to a plurality of input/output devices is performed by the personal output control device, the restrictions on the number of programs and input/output devices can be relaxed compared to the conventional one.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, 1... input/output control device, 2.
...Input/output control means, 3...Output control work area, 4...Output buffer creation/deletion means, 5...Output data transfer means, 6・・・・・・
Output data sending means, 7... Next data output instruction notification means, 8... Data output program, 9.
...Input/output device, 31, 32...Output buffer, 81...Output data, 91...
・Output screen.

Claims (1)

[Claims] Output data storage means for temporarily storing data to be output to an input/output device; and data to be output to the input/output device at one time stored in the output data storage means. an output buffer creation/deletion means for creating a plurality of output buffers for the purpose and deleting the output buffers when they are no longer needed; and outputting all data that the data output program attempts to output to the input/output device at once to the input/output device. output data dividing and transferring means for dividing the output data into a size that can be transferred to the output buffer, output data sending means for sending the output data from the output buffer to the input/output device, and the input/output device. a next data output instruction notifying means for notifying the data output program of the next output data output request from the data output program; the output buffer creation and deletion means, the output data division and transfer means, and the output Instructs the data sending means to control the series of steps up to outputting data from the data output program to the input/output device, and instructs the next data output in response to a data output request from the input/output device. 1. An input/output control device comprising: input/output control means for instructing a data output program to output the next data via a notification means.