93 lines
2.2 KiB
Rust
93 lines
2.2 KiB
Rust
/**
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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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import std::io;
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import option = std::option::t;
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import std::option::some;
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import std::option::none;
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import std::str;
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import std::vec;
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import std::map;
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fn map(filename: str, emit: map_reduce::putter) { emit(filename, "1"); }
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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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type putter = fn(str, str) ;
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type mapper = fn(str, putter) ;
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tag ctrl_proto { find_reducer(str, chan[int]); mapper_done; }
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fn start_mappers(ctrl: chan[ctrl_proto], inputs: vec[str]) {
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for i: str in inputs { spawn map_task(ctrl, i); }
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}
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fn map_task(ctrl: chan[ctrl_proto], input: str) {
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let intermediates = map::new_str_hash();
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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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let c;
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alt im.find(key) {
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some(_c) { c = _c }
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none. {
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let p = port();
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log_err "sending find_reducer";
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ctrl <| find_reducer(key, chan(p));
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log_err "receiving";
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p |> c;
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log_err c;
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im.insert(key, c);
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}
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}
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}
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map(input, bind emit(intermediates, ctrl, _, _));
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ctrl <| mapper_done;
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}
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fn map_reduce(inputs: vec[str]) {
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let ctrl = port[ctrl_proto]();
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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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let reducers: map::hashmap[str, int];
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reducers = map::new_str_hash();
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start_mappers(chan(ctrl), inputs);
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let num_mappers = vec::len(inputs) as int;
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while num_mappers > 0 {
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let m;
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ctrl |> m;
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alt m {
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mapper_done. { num_mappers -= 1; }
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find_reducer(k, cc) {
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let c;
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alt reducers.find(k) { some(_c) { c = _c; } none. { c = 0; } }
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cc <| c;
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}
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}
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}
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}
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}
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fn main() {
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map_reduce::map_reduce(["../src/test/run-pass/hashmap-memory.rs"]);
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} |