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30 lines
1.3 KiB
Plaintext
30 lines
1.3 KiB
Plaintext
{{QBDLDATE:05-20-2022}}
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{{QBDLTIME:23:06:53}}
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The [[$CHECKING]] metacommand turns C++ event checking ON or OFF.
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{{PageSyntax}}
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: [[$CHECKING]]:{ON|OFF}
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{{PageDescription}}
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* The Metacommand does '''not''' require a comment or REM before it. There is no space after the colon.
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* The OFF action turns event checking off and should '''only be used when running stable, errorless code.'''
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* The default [[$CHECKING]]:ON action is only required when checking has been turned OFF previously.
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* When [[$CHECKING]]:OFF is used, all error code and the reporting code is removed from the EXE program.
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* '''Warning: Turning OFF error checking could create a General Protection Fault (or segfault). Use only with 100% stable sections of code.'''
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===Details===
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* After every QB64 command is translated to C++, the compiler adds special code sections to check for [[ON TIMER (n)]] events and errors that may have occured in the last function call. Disabling error checking with the [[$CHECKING]]:OFF directive prevents the compiler from adding the extra code sections.
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* Setting [[$CHECKING]]:OFF is only designed for 100% stable, errorless sections of code, where every CPU cycle saved counts, such as in a software 3D texture mapper, for example.
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{{PageSeeAlso}}
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* [[ON TIMER(n)]]
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* [[ON ERROR]]
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* [[Metacommand]]
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* [[ERROR Codes]]
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{{PageNavigation}}
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