Example using boost co-routines for a simple job dispatcher

Using boost 1.56

g++ -g -O2 -I ./boost_1_56_0 -o ./jobdispatcher -Wall ./JobDispatcher.cpp -L ./boost_1_56_0/stage/lib -lboost_coroutine -lboost_thread -lboost_context -lboost_chrono -lboost_system -lboost_timer

LD_LIBRARY_PATH=./boost_1_56_0/stage/lib ./jobdispatcher

A "job" is a simple class that increments a count to a total.

First loop runs the jobs using co-routines. They are completed in order of size:

Finished 9 4537129 Finished 35 7578698 Finished 47 11103480 Finished 3 15348233 Finished 27 15960828 Finished 42 19148236 Finished 7 20329774 Finished 19 22421176 Finished 48 23134235 Finished 28 25673220 Finished 10 26405856 Finished 39 29557663 Finished 32 33428080 Finished 15 36339384 Finished 24 36747332 Finished 11 37074222 Finished 1 37336352 Finished 49 37858795 Finished 13 38363985 ...

Second loop uses standard sub-routines. The jobs are completed in order of submitting to queue:

Finished 0 45181148 Finished 1 37336352 Finished 2 78108765 Finished 3 15348233 Finished 4 74150618 Finished 5 64104518 Finished 6 50789037 Finished 7 20329774 Finished 8 68705229 Finished 9 4537129 Finished 10 26405856 Finished 11 37074222 Finished 12 53106040 Finished 13 38363985 Finished 14 41142711 Finished 15 36339384 Finished 16 60876115 Finished 17 62843289 Finished 18 96819201