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Cygwin: FIFO: update select

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Add static functions peek_fifo, thread_fifo, start_thread_fifo, and
fifo_cleanup to select.cc.  These are based on the corresponding pipe
functions, the main difference being that peek_fifo loops through the
connected clients to see if any of them have data available for
reading.

Add the fhandler_fifo methods select_read, select_write, and
select_except.

Add accessor methods get_nclients, get_handle, and is_connected that
are needed by peek_fifo.
This commit is contained in:
Ken Brown
2019-03-22 19:30:41 +00:00
committed by Corinna Vinschen
parent 1aa438a94c
commit ee394c311e
3 changed files with 157 additions and 15 deletions
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4
winsup/cygwin/fhandler.h
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@ -1278,6 +1278,10 @@ class fhandler_fifo: public fhandler_base
public:
fhandler_fifo ();
bool hit_eof ();
int get_nclients () const { return nclients; }
HANDLE& get_handle () { return fhandler_base::get_handle (); }
HANDLE get_handle (int i) const { return client[i].fh->get_handle (); }
bool is_connected (int i) const { return client[i].state == fc_connected; }
PUNICODE_STRING get_pipe_name ();
DWORD listen_client_thread ();
void fifo_client_lock () { _fifo_client_lock.lock (); }