/*
* clock_gettime_stub.c
* gcc -Wall -c clock_gettime_stub.c
* posix realtime functions; MacOS user space glue
*/
/* @comment
* other possible implementation using intel builtin rdtsc
* rdtsc-workaround: http://www.mcs.anl.gov/~kazutomo/rdtsc.html
*
* we could get the ticks by doing this
*
* __asm __volatile("mov %%ebx, %%esi\n\t"
* "cpuid\n\t"
* "xchg %%esi, %%ebx\n\t"
* "rdtsc"
* : "=a" (a),
* "=d" (d)
* );
* we could even replace our tricky sched_yield call by assembly code to get a better accurency,
* anyway the following C stub will satisfy 99% of apps using posix clock_gettime call,
* moreover, the setter version (clock_settime) could be easly written using mach primitives:
* http://www.opensource.apple.com/source/xnu/xnu-${VERSION}/osfmk/man/ (clock_[set|get]_time)
*
* hackers don't be crackers, don't you use a flush toilet?
*
*
* @see draft: ./posix-realtime-stub/posix-realtime-stub.c
*
*/
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