Memory layout of a data structure: Difference between revisions
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It is often useful to control the memory layout of fields in a data structure to match an interface control definition, or to interface with hardware. |
It is often useful to control the memory layout of fields in a data structure to match an interface control definition, or to interface with hardware. Define a data structure matching the RS-232 Plug Definition. Use the 9-pin definition for brevity. |
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Define a data structure matching the RS-232 Plug Definition. Use the 9-pin definition for brevity. |
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Pin Settings for Plug |
Pin Settings for Plug |
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(Reverse order for socket.) |
(Reverse order for socket.) |
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=={{header|Ada}}== |
=={{header|Ada}}== |
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[[Category:Ada]] |
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type Bit is mod 2; |
type Bit is mod 2; |
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type Rs_232_Layout is record |
type Rs_232_Layout is record |
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=={{header|C}}/{{header|C++}}== |
=={{header|C}}/{{header|C++}}== |
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[[Category:C]] |
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[[Category:C++]] |
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Note: The order of the fields is implementation-defined (i.e. the first bit might be the least-significant one or the most-significant one). On GCC and MSVC++, the first bit is the least-significant one. |
Note: The order of the fields is implementation-defined (i.e. the first bit might be the least-significant one or the most-significant one). On GCC and MSVC++, the first bit is the least-significant one. |
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struct RS232_data |
struct RS232_data |
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