[Lldb-commits] [PATCH] Enable PipeWindows to support reading with timeout, and fix broken build of llgs.

[Oleksiy Vyalov]

I'm thinking about having Pipe class as a base class with derived AnonymousPipe and NamedPipe.

AnonymousPipe will be almost replica of existing Pipe class with custom Open(OpenOptions opts) method.
NamedPipe will have following own methods:

    enum OpenOptions
    {
        eOpenOptionNonBlocking      = (1u << 0),  // Non-blocking reads
        eOpenChildProcessesInherit  = (1u << 1)   // Child processes inherit
    };


```
explicit NamedPipe(const char* name);

bool Create(); //mkfifo
bool Delete(); //Close() & unlink

bool OpenReader(OpenOptions opts);
bool OpenWriter(OpenOptions opts);
```

For named pipes we don't need to have both reader & writer opened in the same processes - so, that's why I think we may need separate open methods.
In order to read with timeout pipe should be opened in non-blocking mode - on Windows you may use PIPE_NOWAIT if such option is set.

http://reviews.llvm.org/D6538