Sean Daley wrote:
Read the description to lpBaseAddress again and then read the following comment from cygwin's mmap code: /* If a non-zero address is given, try mapping using the given address first. If it fails and flags is not MAP_FIXED, try again with NULL address. */
I did. Now may I ask you in exchange to re-read my previous posts?
Again, it's a mistery to me why e.g. mmap(0x641000,...), although not forced to, does return the _suggested_ 0x641000 _exactly_, whereas mmap(0x641000,..., MAP_FIXED) fails?!
Also, the Linux man page for mmap pretty much sums it up as follows:
mmap on Linux works flawlessly with MAP_FIXED, according to the POSIX requirements - i.e., as far as the address is on the page boundary. In cygwin, it's not the case; instead, alignment to the "granularity" of the mem allocations is needed. BTW, can I get this value from the Cygwin API or need to query Win32 directly?
Regards,
Evgeny
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