Steel Bank Common Lisp

Update of /cvsroot/sbcl/sbcl/tools-for-build
In directory sc8-pr-cvs1:/tmp/cvs-serv31939/tools-for-build

Modified Files:
      Tag: atropos-branch
	grovel_headers.c 
Log Message:
0.8.3.95.atropos.1 ; cutting threads
	
	There is getting to be rather a lot of sensible but
	not-now-while-we're-releasing code in my thread/gc fix.
	So here it is on a branch, hopefully minus the slightly
	more evil debugging crud

	doc/ - fix up some of the sgml errors that sourceforge keeps 
	mailing me about

	New function release-spinlock that only changes the lock value
	if we owned the spinlock, so good for unwind-protect cleanups
	when lock acquisition failed
	
	get-spinlock release-spinlock current-thread-id could all win
	from being inlinable

	Use a RT signal (SIG_DEQUEUE) for resuming threads that were
	on queues, instead of having SIGCONT do both this and the
	resume-after-gc task.

	Scattered commentary describing the state of the signal mask 
	in various interesting places

	In gencgc alloc, only install a deferred handler for GC if
	there was no previous handler for anything else.  This fixes
	a longstanding bug where the GC thread would eat all cpu while
	waiting indefinitely for othr threads to stop.

	Add SIG_STOP_FOR_GC to the blockable list

	interrupt_maybe_gc_int: enable signals before calling SUB-GC,
	or the locking that sub-gc does is going to interact badly.

	Minor rearrangement to parent thread to stop it having to wake
	up on every GC

	Inline arch_os_get_current_thread (note, thread.h is not a
	sensible place for an x86linuxonly operation, rearrange this 
	before committing to HEAD)

	Add grovel_headers lines for our RT signals.  OAOOM alert...
	(Actually, of these three we only need SIG-DEQUEUE)



Index: grovel_headers.c
===================================================================
RCS file: /cvsroot/sbcl/sbcl/tools-for-build/grovel_headers.c,v
retrieving revision 1.11
retrieving revision 1.11.6.1
diff -u -d -r1.11 -r1.11.6.1
--- grovel_headers.c	3 Sep 2003 08:41:54 -0000	1.11
+++ grovel_headers.c	30 Sep 2003 11:23:04 -0000	1.11.6.1
@@ -188,6 +188,11 @@
     DEFSIGNAL(SIGXCPU);
     DEFSIGNAL(SIGXFSZ);
 #endif
-
+#ifdef LISP_FEATURE_SB_THREAD
+    /* FIXME OAOOM alert: this information is duplicated in linux-os.h */
+    defconstant("sig-interrupt-thread",SIGRTMIN);
+    defconstant("sig-stop-for-gc",SIGRTMIN+1);
+    defconstant("sig-dequeue",SIGRTMIN+2);
+#endif
     return 0;
 }