> For Alpha: sizeof(int) == 4, sizeof(long) == 8, sizeof(void *) == 8
> For intel: sizeof(int) == 4, sizeof(long) == 4, sizeof(void *) == 8
That second line is _only_ correct for Win64.
The Linux way:
char is 8 bits
char may be signed or unsigned by default
short is 16 bits
int is 32 bits
long is the name number of bits as a pointer
long is either 32 bits or 64 bits
long long is 64 bits
don't cast from "foo *" to "bar *" if sizeof(foo)<sizeof(bar)
in a struct, put big items first to avoid padding
don't use "long" in a struct that goes to disk or over the network
with few exceptions, floating-point math in the kernel is prohibited
don't assume that all physical memory is continuously mapped
don't assume that you can DMA to any address you like
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