2011-07-12 16:19:38 -05:00
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/**
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A somewhat reduced test case to expose some Valgrind issues.
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This originally came from the word-count benchmark.
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*/
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use std;
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2012-01-31 19:05:20 -06:00
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import option = option;
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2011-12-13 18:25:51 -06:00
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import option::some;
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import option::none;
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import str;
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import vec;
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2011-07-12 16:19:38 -05:00
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import std::map;
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2012-03-07 18:48:57 -06:00
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import std::map::hashmap;
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2011-12-13 18:25:51 -06:00
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import task;
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import comm::chan;
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import comm::port;
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import comm::send;
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import comm::recv;
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import comm;
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2011-07-12 16:19:38 -05:00
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2011-09-12 04:27:30 -05:00
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fn map(filename: str, emit: map_reduce::putter) { emit(filename, "1"); }
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2011-07-12 16:19:38 -05:00
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mod map_reduce {
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export putter;
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export mapper;
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export map_reduce;
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2011-10-18 17:07:40 -05:00
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type putter = fn@(str, str);
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2011-07-12 16:19:38 -05:00
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2012-07-03 18:11:00 -05:00
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type mapper = extern fn(str, putter);
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2011-07-12 16:19:38 -05:00
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2012-06-29 18:26:56 -05:00
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enum ctrl_proto { find_reducer(~[u8], chan<int>), mapper_done, }
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2011-07-12 16:19:38 -05:00
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2012-06-29 18:26:56 -05:00
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fn start_mappers(ctrl: chan<ctrl_proto>, inputs: ~[str]) {
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2012-06-30 18:19:07 -05:00
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for inputs.each |i| {
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task::spawn(|| map_task(ctrl, i) );
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2012-01-04 23:14:53 -06:00
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}
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2011-07-12 16:19:38 -05:00
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}
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2012-01-04 23:14:53 -06:00
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fn map_task(ctrl: chan<ctrl_proto>, input: str) {
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2012-03-14 14:07:23 -05:00
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let intermediates = map::str_hash();
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2011-07-27 07:19:39 -05:00
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2011-09-12 04:27:30 -05:00
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fn emit(im: map::hashmap<str, int>, ctrl: chan<ctrl_proto>, key: str,
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val: str) {
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2012-03-22 10:39:41 -05:00
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let mut c;
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2011-08-31 17:23:34 -05:00
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alt im.find(key) {
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2011-07-27 07:19:39 -05:00
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some(_c) { c = _c }
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2012-01-19 00:37:22 -06:00
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none {
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2011-08-25 13:20:43 -05:00
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let p = port();
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2011-12-22 16:42:52 -06:00
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#error("sending find_reducer");
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2011-09-01 19:27:58 -05:00
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send(ctrl, find_reducer(str::bytes(key), chan(p)));
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2011-12-22 16:42:52 -06:00
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#error("receiving");
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2011-08-25 13:20:43 -05:00
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c = recv(p);
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2011-12-22 19:53:53 -06:00
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log(error, c);
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2011-08-31 17:23:34 -05:00
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im.insert(key, c);
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2011-07-27 07:19:39 -05:00
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}
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2011-07-12 16:19:38 -05:00
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}
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}
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2012-06-30 18:19:07 -05:00
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map(input, |a,b| emit(intermediates, ctrl, a, b) );
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2011-08-13 17:20:11 -05:00
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send(ctrl, mapper_done);
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2011-07-12 16:19:38 -05:00
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}
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2012-06-29 18:26:56 -05:00
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fn map_reduce(inputs: ~[str]) {
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2011-08-25 13:20:43 -05:00
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let ctrl = port();
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2011-07-12 16:19:38 -05:00
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// This task becomes the master control task. It spawns others
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// to do the rest.
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2012-03-22 10:39:41 -05:00
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let mut reducers: map::hashmap<str, int>;
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2011-07-12 16:19:38 -05:00
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2012-03-14 14:07:23 -05:00
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reducers = map::str_hash();
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2011-07-12 16:19:38 -05:00
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2011-08-25 13:20:43 -05:00
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start_mappers(chan(ctrl), inputs);
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2011-07-12 16:19:38 -05:00
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2012-03-22 10:39:41 -05:00
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let mut num_mappers = vec::len(inputs) as int;
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2011-07-12 16:19:38 -05:00
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2011-07-27 07:19:39 -05:00
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while num_mappers > 0 {
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2011-08-25 13:20:43 -05:00
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alt recv(ctrl) {
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2012-01-19 00:37:22 -06:00
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mapper_done { num_mappers -= 1; }
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2011-07-27 07:19:39 -05:00
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find_reducer(k, cc) {
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2012-03-22 10:39:41 -05:00
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let mut c;
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2012-01-25 02:53:17 -06:00
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alt reducers.find(str::from_bytes(k)) {
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2011-08-13 17:20:11 -05:00
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some(_c) { c = _c; }
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2012-01-19 00:37:22 -06:00
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none { c = 0; }
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2011-08-13 17:20:11 -05:00
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}
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send(cc, c);
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2011-07-27 07:19:39 -05:00
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}
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2011-07-12 16:19:38 -05:00
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}
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}
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}
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}
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2011-07-23 15:01:05 -05:00
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fn main() {
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2012-06-29 18:26:56 -05:00
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map_reduce::map_reduce(~["../src/test/run-pass/hashmap-memory.rs"]);
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2011-08-15 23:54:52 -05:00
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}
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