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* fhandler.cc (fhandler_base::read): Return just read ahead characters if slow

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device.
* fhandler.h (fhandler_base::set_eof): New virtual method.
(fhandler_pipe::set_eof): New method.
* pipe.cc (fhandler_pipe::fhandler_pipe): Clear saweof flag.
(fhandler_pipe::read): Return immediately if hit eof.
(fhandler_pipe::hit_eof): Return true if saweof flag is set.
* select.cc (peek_pipe): Don't call PeekNamedPipe if we couldn't grab the guard
mutex.
This commit is contained in:
Christopher Faylor
2001-11-03 05:42:21 +00:00
parent 243a041bd0
commit c41570695a
5 changed files with 36 additions and 46 deletions
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38
winsup/cygwin/fhandler.h
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@ -13,41 +13,6 @@ details. */
#include <sys/ioctl.h>
/* Classes
Code is located in fhandler.cc unless another file name is given.
fhandler_base normal I/O
fhandler_disk_file
fhandler_serial Adds vmin and vtime.
fhandler_dev_null Not really I/O
fhandler_dev_zero Faked
fhandler_dev_raw (fhandler_raw.cc)
fhandler_dev_floppy (fhandler_floppy.cc)
fhandler_dev_tape (fhandler_tape.cc)
fhandler_pipe
fhandler_socket (fhandler_socket.cc)
fhandler_tty_slave (tty.cc)
fhandler_pty_master (tty.cc)
fhandler_tty_master (tty.cc)
fhandler_console Out with ansi control. (console.cc)
fhandler_windows Windows messages I/O (fhandler_windows.cc)
fhandler_dev_random /dev/[u]random implementation (fhandler_random.cc)
fhandler_dev_mem /dev/mem implementation (fhandler_mem.cc)
fhandler_dev_clipboard /dev/clipboard implementation (fhandler_clipboard.cc)
fhandler_proc Interesting possibility, not implemented yet
*/
enum
{
FH_RBINARY = 0x00001000, /* binary read mode */
@ -372,6 +337,7 @@ class fhandler_base
}
void operator delete (void *);
virtual HANDLE get_guard () const {return NULL;}
virtual void set_eof () {}
};
class fhandler_socket: public fhandler_base
@ -425,6 +391,7 @@ class fhandler_socket: public fhandler_base
class fhandler_pipe: public fhandler_base
{
HANDLE guard;
bool saweof;
HANDLE writepipe_exists;
DWORD orig_pid;
unsigned id;
@ -441,6 +408,7 @@ class fhandler_pipe: public fhandler_base
int dup (fhandler_base *child);
void fixup_after_fork (HANDLE);
bool hit_eof ();
void set_eof () {saweof = true;}
friend int make_pipe (int fildes[2], unsigned int psize, int mode);
HANDLE get_guard () const {return guard;}
};