| Copyright | (c) The University of Glasgow 2017 |
|---|---|
| License | see libraries/base/LICENSE |
| Maintainer | libraries@haskell.org |
| Stability | internal |
| Portability | non-portable |
| Safe Haskell | Safe |
| Language | Haskell2010 |
GHC.IO.SubSystem
Description
The IoSubSystem control interface. These methods can be used to disambiguate
between the two operations.
The API of this module is unstable and not meant to be consumed by the general public.
If you absolutely must depend on it, make sure to use a tight upper
bound, e.g., base < 4.X rather than base < 5, because the interface can
change rapidly without much warning.
Synopsis
- withIoSubSystem :: (IoSubSystem -> IO a) -> IO a
- withIoSubSystem' :: (IoSubSystem -> a) -> a
- whenIoSubSystem :: IoSubSystem -> IO () -> IO ()
- ioSubSystem :: IoSubSystem
- data IoSubSystem
- conditional :: a -> a -> a
- (<!>) :: a -> a -> a
- isWindowsNativeIO :: Bool
Documentation
withIoSubSystem :: (IoSubSystem -> IO a) -> IO a Source #
withIoSubSystem' :: (IoSubSystem -> a) -> a Source #
whenIoSubSystem :: IoSubSystem -> IO () -> IO () Source #
data IoSubSystem Source #
The I/O SubSystem to use in the program.
@since base-4.9.0.0
Constructors
| IoPOSIX | Use a POSIX I/O Sub-System |
| IoNative | Use platform native Sub-System. For unix OSes this is the same as IoPOSIX, but on Windows this means use the Windows native APIs for I/O, including IOCP and RIO. |
Instances
conditional :: a -> a -> a Source #
Conditionally execute an action depending on the configured I/O subsystem. On POSIX systems always execute the first action. On Windows execute the second action if WINIO as active, otherwise fall back to the first action.
(<!>) :: a -> a -> a infixl 7 Source #
Infix version of conditional.
posix ! windows == conditional posix windows