JPH0424747A - Timer device for multi-task - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is applicable to a timer device in an information processing device such as a computer or a personal computer capable of multitasking processing, and particularly to a timer processing for waiting for input from a keyboard, mouse, etc. of a personal computer. Relating to an applicable timer device.

(Prior Art) Conventionally, when timer processing is required in computers, personal computers, etc. capable of multitasking, it is processed by software as shown in FIG. N count values corresponding to the set time to be searched and desired are registered for each timer process.

The N count values set in the timer table 3 are counted by starting a timer interrupt task that is executed every time the set time elapses, and the corresponding timer process is started when the set count value is counted. It is configured to Further, the timer interrupt task always reads the next count value from the timer table 3 and resets it in the timer.

(Plot B to be Solved by the Invention) However, in the conventional processing method described above, the timer table 3 is searched during the execution of the timer interrupt task, the set values are sequentially read out, and the settings for restarting the timer are made. Therefore, if the set number N is large, the required time may become too long to ignore.

Furthermore, since the maximum count value that can be set in the timer table is limited, it is generally difficult to set a long time, such as one year.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its purpose is to simplify processing during timer interrupt tasks and to increase the range of timer settings that can be set. The purpose of the present invention is to provide a timer device for

(Means for Solving the Problems) In order to achieve the above object, a first invention provides information on processing items at time-up, priority order of time-up comparison processing, and current setting of a timer with the first priority. A timer table that stores, for each timer setting, the set time from time to time-up, and the time difference from the most recent higher set time for timer settings whose priority is second or higher, and a timer interrupt task that is performed at regular intervals. A current time counter that counts up and measures the current time each time the timer is started, and a current time counter that counts up and measures the current time at the start of execution of the timer request task for timer settings. A means for subtracting and changing the time value of the hour counter and clearing the time value of the current time counter, and a new setting time inputted together with the processing item at time up when executing the timer request task.
The priority order is determined by comparing the timer setting values already stored in the timer table with the time-up order, and based on the obtained priority order, the difference between the set value and the immediately higher setting value is calculated and stored in the timer table. In addition, the present invention is characterized by comprising means for correcting and rewriting the setting value stored as the immediately lower-order value based on the new setting value.

The second invention is the processing items at time-up, the priority order of time-up comparison processing, the set time from the current time to time-up for the timer setting with the first priority, and the priority order of the timer setting with the second or higher priority. A timer table that stores the time difference between a certain timer setting and the most recent upper setting time for each timer setting, and a current time counter that counts up and measures the current time every time a timer interrupt task starts at regular intervals. Then, the counted up current time counter value is compared with the setting value of the first priority in the timer table, and if they match, both values are cleared and the above value is attached to the setting value of the timer table. The present invention is characterized by comprising means for outputting processing item data at time-up that has been stored.

(Function) In the first invention, the timer table stores the processing items at the time of time-up and the priority of the time-up comparison process, and also the settings for the timer setting that has the first priority from the current time to the time-up. The time difference between the time and the immediately higher setting time for timer settings that are second or higher in priority are stored for each timer setting in multiple types of time units, one large and one small. Each time a timer interrupt task starts at regular intervals, it is counted and the elapsed time is measured in the current time counter. At the start of the timer request task, the time value of the current time counter is subtracted and changed from the first priority set time stored in the timer table, and the time value of the current time counter is cleared.

In the timer request task, when a new setting time is input together with a processing item at time-up, the setting time value already stored in the timer table and the context of time-up are compared to determine the priority order. Based on the obtained priority order, the difference between the input setting value and the immediately higher setting value is calculated and stored in the timer table, and the setting value that was already stored as the immediately lower setting value is changed based on the new setting value. corrected and rewritten.

In the second invention, the timer table stores the processing items at time-up and the priority order of time-up comparison processing, and also the setting time and priority order from the current time to time-up regarding the timer setting having the first priority. The time difference between the second and subsequent timer settings and the immediately higher setting time is stored for each timer setting in multiple types of time units, large and small. A timer interrupt task that is performed at regular intervals is counted each time it is started, and the elapsed time is measured in the current time counter. At the start of the timer request task, the time value of the current time counter is subtracted and changed from the first priority set time stored in the timer table, and the time value of the current time counter is cleared.

Current time counter time value and timer table priority number 1
If they match, both values are cleared and the processing item data at the time of time-up, which is stored along with the set value of the timer table, is output.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 1 is an explanatory diagram outlining the operation of the present invention.
In the timer request task, which is one of the multitasking,
A timer table 1 provided in a memory (not shown) is searched, and timer setting values are registered in an empty area in units of milliseconds, seconds, and thousand seconds. At this time, the contents of processing at time-up are registered together with the set values, and if there are two or more set values, they are registered with priority added in descending order of time from the current time to the set activation time.

Similarly, in the memory or in the register, a current time counter 2 is provided which counts elapsed time in units of milliseconds, seconds, and thousands of seconds, and counts 1 millisecond of the execution interval every time a timer interrupt task is executed.

At the same time, this timer interrupt task compares the counted elapsed time with the highest priority setting value of the timer table 1, and if they match, the corresponding processing content is read out from the timer table 1 and output.

Then, based on the output processing content, a corresponding process is started in the next idle task, and one timer process ends.

FIG. 2 shows the structure of the timer table 1, in which input setting values and processing contents are stored in address order. For each address, the priority, set count value (milliseconds), set count value (seconds), set count + [(thousand seconds), and processing type at time-up are written in order from the upper bit side.

The priority is a number that is assigned in order from the setting value that times up first in the process described later, that is, the smallest setting value.

Each count value is set with the minimum unit being 1 millisecond, which is the execution interval of the timer interrupt task, and the timer can be set for a long period of about 65 million seconds at the maximum, that is, about 2 years.

FIG. 3 is a flowchart showing the operation of the multitask timer device of the present invention when setting a new timer in a timer request task. The operation will be systematically explained below with reference to flowcharts.

When the timer request task is started, n=
1 is set (step 301).

Next, the current time counter value Y at that point is subtracted from the set value T111 stored in the 5th column in the timer table l with the priority level "1" specified in the register (
Step 302), and at the same time, the count value Y of the current counter is cleared (Step 303).

Here, it is determined whether T(1), which is obtained by subtracting the value Y of the current time counter, is zero, and if it is zero, (step 304
(Yes), a timer process set as T(1) is started (step 305).

If it is determined that T(1) is not zero (step 30
4 negation), and the new time K desired to be set in the timer is T(
Step 306)
, if time K is not greater than T(1) (step 30
6 (No), and the value of T(1) is registered as WK (step 307).

Next, after priority (n+1), that is, 2゜3, .
. . and the priority values written in the timer table are each incremented by 1 to become 3.4° (step 30B).

Here, the blank T, 1. In order to register K as the timer setting time of step 309), T is blank.
As (1), register the value obtained by subtracting the set time K from the WK in which T(1) before the change was previously registered (Step 3
10).

Further, in step 306, if the time K that is newly desired to be set in the timer is greater than T (step 306, affirmative), 1 is added to the priority value n stored in the register. 321), the sum of the timer setting values stored in each column of timer table 1 up to priority n specified in the register is calculated as WK (step 322), then the obtained WK is the desired setting time Step 3 to determine whether it is smaller than
23), if WK is still smaller than the desired setting time (
step 323 (affirmative), WK exceeds the desired set time K,
Moreover, the priority order n of the register is sequentially added to WK by +IL until the last timer setting value is reached (step 324 is negative, steps 321 and 322).

If the WK obtained by sequentially adding up the timer setting values up to the priority level n becomes larger than the desired setting time (No in step 323), the values are written in each column of the timer table 1 starting from the priority level (n+1). +1 is added to each priority value (step 325).

As a result of rewriting the priority order, the priority order (n+
1) Write a new value obtained by subtracting the desired setting time K from WK to the timer setting value T (e*+1) (step 326
), similarly, the timer table setting value T of priority n,
R, is rewritten to the value obtained by subtracting WK obtained by adding the timer setting values whose priorities are from 1 to (n-1) from the desired setting time K (step 327), and the timer setting process ends. do.

Note that in the above process, only the timer setting value is registered in timer table 1, but when a new timer is set, the process type that specifies the process content is also registered in the 5 columns of timer table 1. will be written to.

FIG. 4 is an explanatory diagram showing a specific example of input processing of setting values in the timer table 1.

First, in FIG. a, a setting value related to one timer process is input into a timer table 1. The setting contents are that the time-up setting time is "10" seconds, the processing type is "3", and since there is only one setting value, the priority is automatically set to "1".

Also, immediately after setting, the count value of current counter 2 is “
000''.

The figure shows 3 seconds have passed and the current time counter value is 030.
” becomes.

Here, setting of 20" seconds is started as a new timer process. As shown in Figure C, the current time counter's count value 3 The seconds are decremented and rewritten to "7" seconds. At the same time, the current time counter is cleared and becomes "000".

Note that the above processing corresponds to steps 301 to 303 in FIG.

Next, in order to register "20" seconds for processing type "3", add the cumulative total of the current timer table 1 settings (in this case, there is only one setting value, so "7" seconds) and 20".
Compare with seconds. Here, the new setting value "20" seconds is larger than 7°° seconds, so the difference between the two is "13".
Seconds are registered as priority "2" as shown in Figure C'.

The above processing is affirmative in steps 306 and 321 to 3 in FIG.
Corresponds to 27.

FIG. d shows the state after another 2 seconds have elapsed, and the value of the current time counter becomes "020".

At this point, setting of a new timer process is started in order to further register "3" seconds for the process type "3". The count value of the current time counter, 2" seconds, is subtracted from "7" seconds, the first priority setting value in timer table 1, and is rewritten to "5" seconds, as shown in Figure e. At the same time, the current The hour counter is cleared to "000".

The processing up to this point is the same as described above at step 301 in FIG.
- Corresponds to 303.

Next, as shown in the top row of Figure e', a new setting value "3" is set.
"Seconds" are written together with the processing type "3". The written setting value '3'' seconds is smaller than '5'' seconds which had been ranked first in the priority order, so it is written as is with the priority order being set to '1'.

As a result, the ranking of each setting value inputted up to that point is relatively lowered. In addition, the newly input setting value ° "3" seconds is subtracted from the previously entered first place setting value of "5" seconds, which has fallen to second place, and the remaining 2" seconds are used as the new settings. The value is rewritten to the second priority column.

The processing up to this point includes steps 306 negation and 30 in FIG.
7 to 310.

Thereafter, when a new timer process is input, the current counter value is reduced and the set values are compared in size for the set value that has newly become the first priority.

In this way, in the present invention, the set values are registered in order of priority according to the chronological order of operation timing, and the current value counter is updated and the set value with the first priority is registered as a process related to the actual passage of time. Comparison processing with the current value counter is performed, and time-up output processing is performed only when the comparison results match. As a result, the process of rewriting multiple setting values set in timer table 1 for each processing cycle, which was previously performed, is no longer necessary, and even when setting a large number of timer processes, there is no need to increase the processing burden regarding timer settings. First, it is possible to avoid adverse effects on the execution of other tasks.

(Effects of the Invention) As described above, according to the present invention, even when multiple timer setting values are set in the timer pull 4, only the setting value that operates first is counted. , processing during timer interrupt tasks becomes easier. In addition, since the setting time can be set in units of various sizes, the setting range is widened, making it possible to set the timer for a long time, improving usability.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a processing overview of an embodiment of the present invention, FIG. 2 is a configuration diagram of a timer table, FIG. 3 is a flowchart showing the operation, and FIG. 4 is a timer table and current counter at the time of setting. Explanatory diagram showing an example of change in the stored value of
The figure shows a conventional example. 1... Timer table 2... Current time counter 1 Figure Timer ↑A and 7 prongs 7 Figure Timer table 1 - Timer Itt 29 Sftai 2 entry 22: A

Claims (2)

[Claims] (1) Processing items when time is up, priorities for time-up comparison processing, and set time from the current time to time-up for the timer setting with the first priority;
For timer settings whose priority is second or higher, the time difference between the time and the most recent higher setting is stored in a timer table for each timer setting, and is counted up each time a timer interrupt task is started at regular intervals. When starting execution of the current time counter that measures the current time and the timer request task for setting the timer,
A means for subtracting and changing the time value of the current time counter from the first priority set time stored in the timer table and clearing the time value of the current time counter; The new setting time input together with the processing item when the time is up is compared with the timer setting value already stored in the timer table and the context of the time up to determine the priority order, and the priority order is determined based on the obtained priority order. It is characterized by comprising means for calculating the difference between the set value and the immediately higher set value and storing it in the timer table, and correcting and rewriting the set value stored as the immediately lower set value based on the new set value. Multitasking timer device. (2) Processing items when time is up, priorities for time-up comparison processing, and set time from the current time to time-up for the timer setting with the first priority;
For timer settings whose priority is second or higher, the time difference between the time and the most recent higher setting is stored in a timer table for each timer setting, and is counted up each time a timer interrupt task is started at regular intervals. The current time counter that measures the current time is compared with the counted-up current time counter value and the first priority setting value in the timer table, and if they match, both values are cleared and the timer A multitasking timer device comprising: means for outputting processing item data at time-up that was stored incidentally to table setting values;