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Structure Array PCD

Liming Gao edited this page Mar 21, 2019 · 1 revision

PCD can be declared as C Array in DEC file

  • When PCD is declared in DEC file, VOID* will be replaced by C Array.
  • C Array can be basic data type array, such as UINT8[10]
  • C Array can be structure array, such as TEST[20]
  • C Array can be flexible array, such as TEST[]
    gTestPkgTokenSpaceGuid.PcdName|{0x00}|TEST[]|0x10000000
  • C Array PCD value is VOID * type. C source code uses PcdGetPtr(PcdName) API
    to get PCD value pointer, then convert it to C array, and access the element value.
  • If PCD is configured as Dynamic/DynamicEx PCD, C source code can use
    PcdSetPtrS(PcdName, SizeOfBuffer, Buffer) API to update PCD value.

Structure or Array PCD value as C style initialization in DEC/DSC

  • Globle C structure or array can be initialized with the value.
  • If PCD is declared as C Structure or Array, its value can be specified with C style value. For example:
    gTestPkgTokenSpaceGuid.PcdName|{CODE({
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    {0, {0, 0, 0, 0, 0, 0, 0}},
    })}
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