From dae40103a5e4430cb836c731c8b5aee0ca115d3b Mon Sep 17 00:00:00 2001
From: Christopher Faylor <me@cgf.cx>
Date: Thu, 16 May 2013 05:36:15 +0000
Subject: * sigproc.cc (sig_hold): Delete. (sigheld): Delete. (sig_send):
 Eliminate special-case __SIGHOLD handling. (wait_sig): Just flag when signals
 are on hold and add them to the queue rather than stalling the wait_sig loop.
  Clear the flag when __SIGNOHOLD is specified.

---
 winsup/cygwin/sigproc.cc | 81 ++++++++++++++++++------------------------------
 1 file changed, 30 insertions(+), 51 deletions(-)

(limited to 'winsup/cygwin/sigproc.cc')

diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc
index 9deb926de..cf9053804 100644
--- a/winsup/cygwin/sigproc.cc
+++ b/winsup/cygwin/sigproc.cc
@@ -44,8 +44,6 @@ char NO_COPY myself_nowait_dummy[1] = {'0'};// Flag to sig_send that signal goes
 
 #define Static static NO_COPY
 
-Static HANDLE sig_hold;			// Used to stop signal processing
-Static bool sigheld;			// True if holding signals
 
 Static int nprocs;			// Number of deceased children
 Static char cprocs[(NPROCS + 1) * sizeof (pinfo)];// All my children info
@@ -478,24 +476,6 @@ exit_thread (DWORD res)
 int __reg3
 sig_send (_pinfo *p, int sig, _cygtls *tid)
 {
-  if (sig == __SIGHOLD)
-    sigheld = true;
-  else if (!sigheld)
-    /* nothing */;
-  else if (sig == __SIGFLUSH || sig == __SIGFLUSHFAST)
-    return 0;
-  else if (sig == __SIGNOHOLD)
-    {
-      SetEvent (sig_hold);
-      sigheld = false;
-    }
-  else if (&_my_tls == _main_tls)
-    {
-#ifdef DEBUGGING
-      system_printf ("signal %d sent to %p while signals are on hold", sig, p);
-#endif
-      return -1;
-    }
   siginfo_t si = {};
   si.si_signo = sig;
   si.si_code = SI_KERNEL;
@@ -1226,7 +1206,7 @@ static void WINAPI
 wait_sig (VOID *)
 {
   _sig_tls = &_my_tls;
-  sig_hold = CreateEvent (&sec_none_nih, FALSE, FALSE, NULL);
+  bool sig_held = false;
 
   sigproc_printf ("entering ReadFile loop, my_readsig %p, my_sendsig %p",
 		  my_readsig, my_sendsig);
@@ -1275,33 +1255,7 @@ wait_sig (VOID *)
 	      *pack.mask |= bit;
 	  break;
 	case __SIGHOLD:
-	  goto loop;
-	  break;
-	default:
-	  if (pack.si.si_signo < 0)
-	    sig_clear (-pack.si.si_signo);
-	  else
-	    sigq.add (pack);
-	case __SIGNOHOLD:
-	case __SIGFLUSH:
-	case __SIGFLUSHFAST:
-	  {
-	    sigpacket *qnext;
-	    /* Check the queue for signals.  There will always be at least one
-	       thing on the queue if this was a valid signal.  */
-	    while ((qnext = q->next))
-	      {
-		if (qnext->si.si_signo && qnext->process () <= 0)
-		  q = q->next;
-		else
-		  {
-		    q->next = qnext->next;
-		    qnext->si.si_signo = 0;
-		  }
-	      }
-	    if (pack.si.si_signo == SIGCHLD)
-	      clearwait = true;
-	  }
+	  sig_held = true;
 	  break;
 	case __SIGSETPGRP:
 	  init_console_handler (true);
@@ -1328,16 +1282,41 @@ wait_sig (VOID *)
 	      }
 	  }
 	  break;
+	default:
+	  if (pack.si.si_signo < 0)
+	    sig_clear (-pack.si.si_signo);
+	  else
+	    sigq.add (pack);
+	case __SIGNOHOLD:
+	  sig_held = false;
+	case __SIGFLUSH:
+	case __SIGFLUSHFAST:
+	  if (!sig_held)
+	    {
+	      sigpacket *qnext;
+	      /* Check the queue for signals.  There will always be at least one
+		 thing on the queue if this was a valid signal.  */
+	      while ((qnext = q->next))
+		{
+		  if (qnext->si.si_signo && qnext->process () <= 0)
+		    q = q->next;
+		  else
+		    {
+		      q->next = qnext->next;
+		      qnext->si.si_signo = 0;
+		    }
+		}
+	      if (pack.si.si_signo == SIGCHLD)
+		clearwait = true;
+	    }
+	  break;
 	}
       if (clearwait && !have_execed)
 	proc_subproc (PROC_CLEARWAIT, 0);
-    loop:
       if (pack.wakeup)
 	{
 	  sigproc_printf ("signalling pack.wakeup %p", pack.wakeup);
 	  SetEvent (pack.wakeup);
 	}
-      if (pack.si.si_signo == __SIGHOLD)
-	WaitForSingleObject (sig_hold, INFINITE);
     }
 }
-- 
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