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Cygwin: signal: implement signalfd

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First cut of a signalfd implementation.

Still TODO: Non-polling select.

This should mostly work as on Linux except for missing support
for some members of struct signalfd_siginfo, namely ssi_fd,
ssi_band (both SIGIO/SIGPOLL, not fully implemented) and ssi_trapno
(HW exception, required HW support).

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
2019-01-13 23:13:33 +01:00
parent 8ae26f96ae
commit 9d13a2995c
17 changed files with 397 additions and 4 deletions
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40
winsup/cygwin/fhandler.h
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@@ -420,6 +420,7 @@ public:
virtual class fhandler_socket *is_socket () { return NULL; }
virtual class fhandler_socket_wsock *is_wsock_socket () { return NULL; }
virtual class fhandler_console *is_console () { return 0; }
virtual class fhandler_signalfd *is_signalfd () { return NULL; }
virtual int is_windows () {return 0; }
virtual void __reg3 raw_read (void *ptr, size_t& ulen);
@@ -2633,6 +2634,44 @@ class fhandler_procnet: public fhandler_proc
}
};
class fhandler_signalfd : public fhandler_base
{
sigset_t sigset;
public:
fhandler_signalfd ();
fhandler_signalfd (void *) {}
fhandler_signalfd *is_signalfd () { return this; }
char *get_proc_fd_name (char *buf);
int signalfd (const sigset_t *mask, int flags);
int __reg2 fstat (struct stat *buf);
void __reg3 read (void *ptr, size_t& len);
int poll ();
select_record *select_read (select_stuff *);
select_record *select_write (select_stuff *);
select_record *select_except (select_stuff *);
void copyto (fhandler_base *x)
{
x->pc.free_strings ();
*reinterpret_cast<fhandler_signalfd *> (x) = *this;
x->reset (this);
}
fhandler_signalfd *clone (cygheap_types malloc_type = HEAP_FHANDLER)
{
void *ptr = (void *) ccalloc (malloc_type, 1, sizeof (fhandler_signalfd));
fhandler_signalfd *fh = new (ptr) fhandler_signalfd (ptr);
copyto (fh);
return fh;
}
};
struct fhandler_nodevice: public fhandler_base
{
fhandler_nodevice ();
@@ -2672,6 +2711,7 @@ typedef union
char __pty_master[sizeof (fhandler_pty_master)];
char __registry[sizeof (fhandler_registry)];
char __serial[sizeof (fhandler_serial)];
char __signalfd[sizeof (fhandler_signalfd)];
char __socket_inet[sizeof (fhandler_socket_inet)];
char __socket_local[sizeof (fhandler_socket_local)];
#ifdef __WITH_AF_UNIX