[ECOS] programming technic about the macro?

[Qiang Huang]

Hi all:
    I have looked into the IO support function and found the following:

for example(ARM):

#define HAL_READ_UINT16_STRING( _register_, _buf_, _count_)             \
    CYG_MACRO_START                                                     \
    cyg_count32 _i_;                                                    \
    for( _i_ = 0; _i_ < (_count_); _i_++)                               \
        (_buf_)[_i_] = ((volatile CYG_WORD16 *)(_register_))[_i_];      \
    CYG_MACRO_END


in the macro the tempory variable **_i_** has been declared, so if this
macro has been called twice inside one function will it cause any variable
redefinition (_i_)  problem?e.g.

main()
{
   HAL_READ_UINT16_STRING();
   HAL_READ_UINT16_STRING();
}


Thank you.



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