On 30 Jun 2008, at 12:33, David Chisnall wrote:
My man page for vmalloc states:
The obsolete function valloc() allocates size bytes and
returns a pointer to the allocated memory. The memory address
will be a
multiple of the page
size. It is equivalent to memalign(sysconf(_SC_PAGESIZE),size).
I'm not sure whether you are aware of the fact that this function is
considered obsolete.
Not according to POSIX, however it is recommended that applications
use mmap or malloc if possible. In our case, the ideal solution
would be a dedicated, mmap-backed, NSZone for allocating invocation
trampolines.
Sounds good.
At the moment I'm just concentrating on getting libffi working
reliably, but I'd love to add better performing code if you can
provide it.
The idea of per-thread allocation sounds good, but even better if it
cold somehow be integrated with the autorelease mechanism so that we
can minimise the number of times we look up the current thread, while
ensuring that we never leak memory.
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