98 lines
2.4 KiB
Rust
98 lines
2.4 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 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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import std::task;
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import std::comm::chan;
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import std::comm::port;
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import std::comm::send;
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import std::comm::recv;
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import std::comm;
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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([u8], chan<int>); mapper_done; }
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fn start_mappers(ctrl: chan<ctrl_proto>, inputs: [str]) {
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for i: str in inputs { task::spawn2((ctrl, i), map_task); }
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}
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fn# map_task(&&args: (chan<ctrl_proto>, str)) {
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let (ctrl, input) = args;
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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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send(ctrl, find_reducer(str::bytes(key), chan(p)));
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log_err "receiving";
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c = recv(p);
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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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send(ctrl, mapper_done);
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}
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fn map_reduce(inputs: [str]) {
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let ctrl = port();
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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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alt recv(ctrl) {
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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(str::unsafe_from_bytes(k)) {
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some(_c) { c = _c; }
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none. { c = 0; }
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}
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send(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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}
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