Thank you for the reply, but I am not as technically knowledgeable as you, so I really do not know what the words "previously cross-process, unallocated swap-backed heap" mean. I was under the impression that the MAP_ANON feature of mmap is just like opening an mmap with an fd that points to /dev/zero. So, in other words, any memory that you reference using the pointer that mmap returns to you will be initialized to zeros. Is that true of the pointer returned by apr_mmap_create under Windows? From what I could see, APR uses the Windows APIs CreateFileMapping and MapViewOfFile to emulate the mmap function and I don't believe those APIs support the zeroing of the memory they obtain, but I'm not really sure of that, which is why I am asking the question.
William A. Rowe Jr. wrote: > > On 8/12/2011 9:23 AM, sidinsd wrote: >> >> Since APR does not support /dev/zero, but it does support Memory Mapping >> of >> files (see apr_mmap_create, etc.) how does it support the MAP_ANONYMOUS >> feature of the mmap function? > > It returns previously cross-process, unallocated swap-backed heap. > > -- View this message in context: http://old.nabble.com/Emulation-of--dev-zero-on-Windows-tp32250236p32251583.html Sent from the APR Dev (Apache Portable Runtime) mailing list archive at Nabble.com.
