rust/src/libnative/io/timer_helper.rs, branch perf-tmp

io: Implement process wait timeouts

2014-05-14T00:27:42+00:00

This implements set_timeout() for std::io::Process which will affect wait() operations on the process. This follows the same pattern as the rest of the timeouts emerging in std::io::net. The implementation was super easy for everything except libnative on unix (backwards from usual!), which required a good bit of signal handling. There's a doc comment explaining the strategy in libnative. Internally, this also required refactoring the "helper thread" implementation used by libnative to allow for an extra helper thread (not just the timer). This is a breaking change in terms of the io::Process API. It is now possible for wait() to fail, and subsequently wait_with_output(). These two functions now return IoResult due to the fact that they can time out. Additionally, the wait_with_output() function has moved from taking `&mut self` to taking `self`. If a timeout occurs while waiting with output, the semantics are undesirable in almost all cases if attempting to re-wait on the process. Equivalent functionality can still be achieved by dealing with the output handles manually. [breaking-change] cc #13523

core: Remove the cast module

2014-05-11T08:13:02+00:00

This commit revisits the `cast` module in libcore and libstd, and scrutinizes all functions inside of it. The result was to remove the `cast` module entirely, folding all functionality into the `mem` module. Specifically, this is the fate of each function in the `cast` module. * transmute - This function was moved to `mem`, but it is now marked as #[unstable]. This is due to planned changes to the `transmute` function and how it can be invoked (see the #[unstable] comment). For more information, see RFC 5 and #12898 * transmute_copy - This function was moved to `mem`, with clarification that is is not an error to invoke it with T/U that are different sizes, but rather that it is strongly discouraged. This function is now #[stable] * forget - This function was moved to `mem` and marked #[stable] * bump_box_refcount - This function was removed due to the deprecation of managed boxes as well as its questionable utility. * transmute_mut - This function was previously deprecated, and removed as part of this commit. * transmute_mut_unsafe - This function doesn't serve much of a purpose when it can be achieved with an `as` in safe code, so it was removed. * transmute_lifetime - This function was removed because it is likely a strong indication that code is incorrect in the first place. * transmute_mut_lifetime - This function was removed for the same reasons as `transmute_lifetime` * copy_lifetime - This function was moved to `mem`, but it is marked `#[unstable]` now due to the likelihood of being removed in the future if it is found to not be very useful. * copy_mut_lifetime - This function was also moved to `mem`, but had the same treatment as `copy_lifetime`. * copy_lifetime_vec - This function was removed because it is not used today, and its existence is not necessary with DST (copy_lifetime will suffice). In summary, the cast module was stripped down to these functions, and then the functions were moved to the `mem` module. transmute - #[unstable] transmute_copy - #[stable] forget - #[stable] copy_lifetime - #[unstable] copy_mut_lifetime - #[unstable] [breaking-change]

librustc: Remove `~EXPR`, `~TYPE`, and `~PAT` from the language, except

2014-05-07T06:12:54+00:00

for `~str`/`~[]`. Note that `~self` still remains, since I forgot to add support for `Box` before the snapshot. How to update your code: * Instead of `~EXPR`, you should write `box EXPR`. * Instead of `~TYPE`, you should write `Box`. * Instead of `~PATTERN`, you should write `box PATTERN`. [breaking-change]

Replace most ~exprs with 'box'. #11779

2014-05-03T06:00:58+00:00

Fix fallout from std::libc separation

2014-04-04T16:31:44+00:00

std: Move NativeMutex from &mut self to &self

2014-03-23T16:45:19+00:00

The proper usage of shared types is now sharing through `&self` rather than `&mut self` because the mutable version will provide stronger guarantees (no aliasing on *any* thread).

std: Rename Chan/Port types and constructor

2014-03-13T20:23:29+00:00

* Chan => Sender * Port => Receiver * Chan::new() => channel() * constructor returns (Sender, Receiver) instead of (Receiver, Sender) * local variables named `port` renamed to `rx` * local variables named `chan` renamed to `tx` Closes #11765

std: Move libnative task count bookkeeping to std

2014-03-06T05:48:08+00:00

When using tasks in Rust, the expectation is that the runtime does not exit before all tasks have exited. This is enforced in libgreen through the `SchedPool` type, and it is enforced in libnative through a `bookkeeping` module and a global count/mutex pair. Unfortunately, this means that a process which originates with libgreen will not wait for spawned native tasks. In order to fix this problem, the bookkeeping module was moved from libnative to libstd so the runtime itself can wait for native tasks to exit. Green tasks do not manage themselves through this bookkeeping module, but native tasks will continue to manage themselves through this module. Closes #12684

native: Fix usage of a deallocated mutex

2014-03-05T17:11:11+00:00

When the timer_helper thread exited, it would attempt to re-acquire the global task count mutex, but the mutex had previously been deallocated, leading to undefined behavior of the mutex, and in some cases deadlock. Another mutex is used to coordinate shutting down the timer helper thread. Closes #12699

native: Improve windows file handling

2014-02-27T20:03:57+00:00

This commit splits the file implementation into file_unix and file_win32. The two implementations have diverged to the point that they share almost 0 code at this point, so it's easier to maintain as separate files. The other major change accompanied with this commit is that file::open is no longer based on libc's open function on windows, but rather windows's CreateFile function. This fixes dealing with binary files on windows (test added in previous commit). This also changes the read/write functions to use ReadFile and WriteFile instead of libc's read/write. Closes #12406