JPH024931B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Technical Field of the Invention The present invention relates to an asynchronous event synchronization processing method, particularly for application processing in, for example, a data processing device.
In an asynchronous event synchronization processing method in which the monitor intermittently checks the completion report regarding the n-byte transmission request made by the program, the above-mentioned event occurs at least twice during a series of multiple response processes intermittently performed by the monitor. This invention relates to an asynchronous event synchronization processing method that is configured to check for a completion report and receive the completion report at an early stage.

(B) Technical Background and Problems Although the present invention is not limited thereto, it is an asynchronous event synchronization processing method in which a monitor intermittently checks a completion report regarding a request to send n bytes requested by an application program. In this case, the following problems are inherent. In other words, when the monitor checks the completion report due to intermittent operation, it may not have finished, but it may end immediately after that. In such a case, the monitor may Confirmation waits until the corresponding check is performed in response to the operation.

(C) Object and Structure of the Invention The present invention aims to improve the above-mentioned points. an asynchronous processing unit that asynchronously reports the completion of the processed processing to the synchronous processing unit,
The synchronous processing unit intermittently executes a plurality of corresponding processes, including a process of checking whether the process requested to the asynchronous process unit has finished, and a process corresponding to whether the process has ended, and In the asynchronous event synchronization processing method, in which the termination of the requested processing is received in synchronization with the clock, the synchronization processing section receives a notification regarding the termination of the requested processing in response to the intermittent execution. After executing the first process to check whether or not the process has been completed, and in response to the non-completion, executing the process corresponding to the non-completion of the above-mentioned process, the second check process regarding the completion of the requested process is executed.
The present invention is characterized in that it is configured to check whether or not the second processing has been completed, and that the check for whether or not the processing has been completed is executed at least twice between the plurality of corresponding processings. This will be explained below with reference to the drawings.

(D) Embodiment of the Invention FIG. 1 shows the configuration of an embodiment to which the present invention is applied, and FIG. 2 shows an embodiment of the synchronization process of the present invention performed by the monitor shown in FIG.

In FIG. 1, 1 is a microprocessor control device such as a Japanese input device, 2 is a display, 3 is a keyboard, 4 is a line, 5 is a modem,
6 is a monitor, 7 is an application program, 8 is a line control section, 9 is a display control section,
10 is a keyboard control unit, 11 is a line termination information area in which the line control unit 8 sets a termination flag asynchronously when the requested transmission of n bytes is completed, and 12 is an interrupt key on the keyboard. This indicates a request to interrupt a previously requested transmission request for n bytes.

The asynchronous event synchronization processing method of the present invention corresponds to the following situation, which will be explained with reference to FIG. That is, in response to a transmission instruction from the keyboard 3, the application program 7 issues a request to transmit n bytes, and when the line control unit 8 has finished transmitting the n bytes of data, the line termination information area 1 is
Monitor 6 sets the end flag asynchronously to 1.
checks intermittently, and the above situation corresponds to the situation in which the existence of this end flag is confirmed. The corresponding processing by the monitor is as follows: (i) Line termination information area 11
(ii) checking whether the interrupt key 12 has been pressed; (iii) checking the modem status to see if the modem is in a transmittable state; the monitor 6 intermittently performs the above checking process. Conventionally, at least the checks (i) and (ii) above have been carried out in conjunction with this. In this specification, the check in (i) above is referred to as "processing to check whether processing is completed".
, and the checks in (ii) and (iii) above are called ``processing corresponding to no termination of processing.'' Of course, if the completion of transmission is confirmed based on the contents of the line termination information area 11, the process jumps to the process related to the confirmation.

FIG. 2 shows an embodiment of the synchronization process of the present invention performed by the monitor shown in FIG. Note that in the conventional case, it may be considered that the illustrated route A was taken without the illustrated determination.

In the case of the present invention, the content check (determination shown in the figure) of the line termination information area 11 corresponding to (i) above is performed at least twice (i.e., determination and determination). The "processing for waiting for completion" shown in the figure is described in (ii) above.
Check whether the interrupt key 12 corresponding to the button is pressed or not.
(iii) This process can be considered to correspond to checking the modem status to determine whether the modem is in a transmittable state. In the case shown in Fig. 2, if the end flag is not set at the time of determination, but if the flag is set before the determination, the end flag can be set without undesired elapse of the predetermined waiting time. It becomes possible for the monitor 6 to confirm the existence.

The reason why checks have traditionally been performed intermittently is that repeated checks at high frequencies are not as effective, but (ii)
The check corresponding to (iii) above is performed, and it may be necessary to secure the time required for these checks. A system in which the time required for checking corresponding to the latter reason in the period of intermittent checking is relatively large,
In a system in which the time required for the checks corresponding to (ii) and (iii) above is longer than the time required for the checks corresponding to (i) above, efficient operation is achieved.

(E) Effects of the Invention As described above, according to the present invention, the synchronization processing unit intermittently checks the process completion report multiple times during a series of a plurality of corresponding processes. Therefore, wasted time is reduced in the synchronization confirmation process. be done. That is, for example, if the time interval of the periodic "processing to check whether or not the processing is completed" is W, and the time required for the "processing corresponding to the non-completion" according to the present invention is α, (i) α/W≒0(%) (ii) In the case of α/W≒100(%), even if the “second processing completion check processing” according to the present invention is executed, It doesn't have much effect. However, in the case of (iii) α/W = 50 (%), "check for completion of processing" is
If the process is not completed in the "first process to check whether or not the process has been completed", the process is substantially performed once during the above-mentioned time interval W/2. In addition,
If the process is determined to have ended in the "first process termination check process", it will be performed only once during the time interval W.

In addition, even if the "predetermined waiting time" shown in FIG. 2 in the above explanation becomes an intermittent operation such that it becomes substantially zero, the effect of the present invention will be lost if the determination is repeated multiple times. isn't it.

[Brief explanation of drawings]

FIG. 1 shows the configuration of an embodiment to which the present invention is applied, and FIG. 2 shows an embodiment of the synchronization process of the present invention performed by the monitor shown in FIG. In the figure, 1 is a microprocessor, 2 is a display, 3 is a keyboard, 4 is a line, 5 is a modem,
Reference numeral 6 represents a monitor, 7 an application program, 8 a line control unit, and 11 a line termination information area.

Claims (1)

[Claims] 1. A synchronous processing unit that advances processing in synchronization with a predetermined clock, and an asynchronous processing unit that asynchronously reports completion of the requested processing to the synchronous processing unit, and the synchronous processing unit carries out the asynchronous processing. A plurality of corresponding processes are executed intermittently, consisting of a process to check whether the process requested to the department has finished, and a process corresponding to whether the process has ended, and the completion of the requested process is synchronized with the clock. In the asynchronous event synchronization processing method, the synchronization processing unit checks whether or not the first processing has finished regarding the completion of the requested processing, in response to the intermittent execution. After executing the process and executing the process corresponding to the non-termination of the above-mentioned process in response to the non-termination of the above-mentioned process, it is configured to perform a process of checking whether or not the second process has been completed regarding the completion of the requested process. An asynchronous event synchronization processing method, characterized in that, between the plurality of corresponding processings, a check for completion of the processing is executed at least twice.