DosIdle for Clipper 1.4

• Introduction
• As it works
• As it to use
• Download
• Last changes

The basic purpose of this module is release of virtual machine time-slice in idle loop of the Clipper-program under Windows or OS/2 control. Due to this, the program, being in a condition of idle loop, does not occupy processor and allows maximum effectively to work to other processes.

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As it works

Established hook on unknown :) procedure, periodically called Clipper at check of the keyboard. Periodically, by a call of this procedure, function of release current virtual machine time-slice (INT 2F, AX = 1680) is called. As have shown experiments, frequencies of a call of this functions is quite sufficient to sleep the unactive program under OS/2 or Windows. At the same time productivity of an active task falls rather unsignificantly: no more, than on 1-2%.

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As it to use

Include DOSIDLE.OBJ in the list of linked modules and in initialization part of your program add a call of function DosIdle(). Basically, the frequency of release time-slice is picked up by me experimentally, can appear, that the given function will work inefficiently by some machines (if it so, write to me about it). Therefore I offer to provide in the program any mechanism managing turn on or off of this module :)

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Download

Package	Size	Download
DosIdle (with source codes)	7 KB	[Download]

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Last changes

Version 1.4

• upd: You can turn off releasing of time-slices by call DosIdle(.F.). The work of the module was checked under Windows XP SP2 and OS/2 Warp MCP2.

• upd: Support of Clipper Summer 87 is added. The work of the module was checked under Windows 2000 SP3 and OS/2 Warp 4.5 CP2.

• fix: The time-slice release did not work under management Windows NT in the case if the program was assembled for work in a protected mode. The work of a new module was checked under Windows 98, Windows NT, OS/2 Warp 4.0 and PC-DOS 2000.
• upd: Show of the information about module on a key //info at start of the program.

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DosIdle for Clipper
The basic purpose of this module is release of virtual machine time-slice in idle loop of the Clipper-program under Windows or OS/2 control. Due to this, the program, being in a condition of idle loop, does not occupy processor and allows maximum effectively to work to other processes.