JehanneOS/newlib
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Cygwin: signal: implement signalfd

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

62
winsup/cygwin/signal.cc
View File

@@ -12,6 +12,7 @@ details. */
#include "winsup.h"
#include <stdlib.h>
#include <sys/cygwin.h>
#include <sys/signalfd.h>
#include "pinfo.h"
#include "sigproc.h"
#include "cygtls.h"
@@ -592,7 +593,7 @@ siginterrupt (int sig, int flag)
return res;
}
static inline int
int
sigwait_common (const sigset_t *set, siginfo_t *info, PLARGE_INTEGER waittime)
{
int res = -1;
@@ -781,3 +782,62 @@ sigaltstack (const stack_t *ss, stack_t *oss)
__endtry
return 0;
}
extern "C" int
signalfd (int fd_in, const sigset_t *mask, int flags)
{
int ret = -1;
fhandler_signalfd *fh;
debug_printf ("signalfd (%d, %p, %y)", fd_in, mask, flags);
if ((flags & ~(SFD_NONBLOCK | SFD_CLOEXEC)) != 0)
{
set_errno (EINVAL);
goto done;
}
if (fd_in != -1)
{
/* Change signal mask. */
cygheap_fdget fd (fd_in);
if (fd < 0)
goto done;
fh = fd->is_signalfd ();
if (!fh)
{
set_errno (EINVAL);
goto done;
}
__try
{
if (fh->signalfd (mask, flags) == 0)
ret = fd_in;
}
__except (EINVAL) {}
__endtry
}
else
{
/* Create new signalfd descriptor. */
cygheap_fdnew fd;
if (fd < 0)
goto done;
fh = (fhandler_signalfd *) build_fh_dev (*signalfd_dev);
if (fh && fh->signalfd (mask, flags) == 0)
{
fd = fh;
if (fd <= 2)
set_std_handle (fd);
ret = fd;
}
else
delete fh;
}
done:
syscall_printf ("%R = signalfd (%d, %p, %y)", ret, fd_in, mask, flags);
return ret;
}