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exporting priv::weaken_task and adding some debug logging

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This commit is contained in:
Jeff Olson 2012-04-11 22:14:45 -07:00 • committed by Brian Anderson
parent c6667c06c3
commit f06362d5bb
1 changed files with 8 additions and 1 deletions
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9
src/libcore/priv.rs
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@ -1,6 +1,6 @@
#[doc(hidden)];
export chan_from_global_ptr;
export chan_from_global_ptr, weaken_task;
import compare_and_swap = rustrt::rust_compare_and_swap_ptr;
@ -32,8 +32,11 @@ unsafe fn chan_from_global_ptr<T: send>(
abort
}
log(debug,"ENTERING chan_from_global_ptr, before is_prob_zero check");
let is_probably_zero = *global == 0u;
log(debug,"after is_prob_zero check");
if is_probably_zero {
log(debug,"is probably zero...");
// There's no global channel. We must make it
let setup_po = comm::port();
@ -51,14 +54,17 @@ unsafe fn chan_from_global_ptr<T: send>(
}
};
log(debug,"before setup recv..");
// This is the proposed global channel
let ch = comm::recv(setup_po);
// 0 is our sentinal value. It is not a valid channel
assert unsafe::reinterpret_cast(ch) != 0u;
// Install the channel
log(debug,"BEFORE COMPARE AND SWAP");
let swapped = compare_and_swap(
global, 0u, unsafe::reinterpret_cast(ch));
log(debug,#fmt("AFTER .. swapped? %?", swapped));
if swapped {
// Success!
@ -70,6 +76,7 @@ unsafe fn chan_from_global_ptr<T: send>(
unsafe::reinterpret_cast(*global)
}
} else {
log(debug, "global != 0");
unsafe::reinterpret_cast(*global)
}
}