Parallel loop execution?

[Mauricio Caceres]

I have the following loop in Mata

mata:
result = 0

for (i = 1; i <= 100; i++) {
   result_i = // Operations using the i-th observation
   result = result + result_i
}
end

This should be executable in parallel. Each thread takes, say, 50 observations and returns the sum, and at the end I collect each result. Something like

mata:
result_thread1 = result_thread2 = 0

// Thread 1
waitfor_thread1 = 1
for (i = 1; i <= 50; i++) {
    result_i = // Operations using the i-th observation
    result_thread1 = result + result_i
}
waitfor_thread1 = 0

// Thread 2
waitfor_thread2 = 1
for (i = 51; i <= 100; i++) {
   result_i = // Operations using the i-th observation
   result_thread2 = result + result_i
}
waitfor_thread2 = 0

// Collect
while (waitfor_thread1 & waitfor_thread2) {}
result = result_thread1 + result_thread2
end

But have the three code cunks execute in parallel. Is such a thing possible? Workarounds and hacks welcome.

Thanks!