Hi,
Am 17.12.2010 um 10:47 schrieb Stefano Bonifazi:
I've got an explanation from a C guru :)
((long REGPARM (*)(void *))code_gen_prologue)(tb_ptr)
---------
(long REGPARM (*)(void *)) is a type: a pointer pointing to a
function, which takes one (void*) parameter. code_gen_prologue is
an>array, array's name when used is considered to be a pointer to
its first element, thus you are casting here pointer to the first
byte of>array to pointer to function (...).
Ellipsis with tb_ptr mean 'call function under this address and
pass there whatever tb_ptr is'
Now everything is very clear for me :)
I do know pointer to functions, and if I had got:
long REGPARM (*myfunc)(void *)
I would have recognized it.. but removing the function pointer name,
leaving only the * was enough for me to be lost :[
Feel free to take the next step then and read CODING_GUIDELINES to
create and submit your first Git patch to make the code more readable
for others. Introducing a typedef for the cast might not be a bad idea.
also the definition of code_gen_prologue was tricky:
uint8_t code_gen_prologue[1024] code_gen_section;
that code_gen_section at first confused my idea of a normal variable
definition as "type identifier" .. until I found out it was a define
for a compiler directive (alignment) :[
Would capitalizing code_gen_section have helped to recognize it as a
preprocessor define? Another patch idea. :)
Regards,
Andreas
