* Added SIGNAL_FLAG_DONT_RESTART_SYSCALL for send_signal_etc() which

utilizes the THREAD_FLAG_DONT_RESTART_SYSCALL (but only in SIGCONT
  for now).
* resume_thread() is now using that flag to be compatible with BeOS.
* This fixes the Terminal hanging on close.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24045 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/ksignal.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2003-2007, Axel Dörfler, [email protected]. All rights reserved.
+ * Copyright 2003-2008, Axel Dörfler, [email protected]. All rights reserved.
  * Distributed under the terms of the MIT License.
  */
 #ifndef _KERNEL_SIGNAL_H
@@ -15,8 +15,9 @@
 #define SIGNAL_TO_MASK(signal)	(1LL << (signal - 1))
 
 // additional send_signal_etc() flag
-#define SIGNAL_FLAG_TEAMS_LOCKED	(0x10000)
+#define SIGNAL_FLAG_TEAMS_LOCKED			(0x10000)
 	// interrupts are disabled and team lock is held
+#define SIGNAL_FLAG_DONT_RESTART_SYSCALL	(0x20000)
 
 
 #ifdef __cplusplus

src/system/kernel/signal.cpp

@@ -499,6 +499,9 @@ deliver_signal(struct thread *thread, uint signal, uint32 flags)
 			if (thread->state == B_THREAD_SUSPENDED)
 				scheduler_enqueue_in_run_queue(thread);
 
+			if ((flags & SIGNAL_FLAG_DONT_RESTART_SYSCALL) != 0)
+				atomic_or(&thread->flags, THREAD_FLAGS_DONT_RESTART_SYSCALL);
+
 			atomic_and(&thread->sig_pending, ~STOP_SIGNALS);
 				// remove any pending stop signals
 			break;

src/system/kernel/thread.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2007, Axel Dörfler, [email protected].
+ * Copyright 2002-2008, Axel Dörfler, [email protected].
  * Distributed under the terms of the MIT License.
  *
  * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
@@ -2345,7 +2345,10 @@ resume_thread(thread_id id)
 	if (id <= 0)
 		return B_BAD_VALUE;
 
-	return send_signal(id, SIGCONT);
+	return send_signal_etc(id, SIGCONT, SIGNAL_FLAG_DONT_RESTART_SYSCALL);
+		// This retains compatibility to BeOS which documents the
+		// combination of suspend_thread() and resume_thread() to
+		// interrupt threads waiting on semaphores.
 }