[newlib-cygwin] tsleep: Add a PNOLOCK flag

[Sebastian Huber <sh@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=4bf5c259d3be0216a4b0e322fa5a60bb46ea7279

commit 4bf5c259d3be0216a4b0e322fa5a60bb46ea7279
Author: Andrew Gallatin <gallatin@FreeBSD.org>
Date:   Thu Aug 5 17:16:30 2021 -0400

    tsleep: Add a PNOLOCK flag
    
    Add a PNOLOCK flag so that, in the race circumstance where
    wakeup races are externally mitigated, tsleep() can be
    called with a sleep time of 0 without triggering an
    an assertion.
    
    Reviewed by: jhb
    Sponsored by: Netflix

Diff:
---
 newlib/libc/sys/rtems/include/sys/param.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/newlib/libc/sys/rtems/include/sys/param.h b/newlib/libc/sys/rtems/include/sys/param.h
index 2e44057dd..c346453bf 100644
--- a/newlib/libc/sys/rtems/include/sys/param.h
+++ b/newlib/libc/sys/rtems/include/sys/param.h
@@ -153,9 +153,11 @@
 	((off_t)(db) << DEV_BSHIFT)
 #endif
 
-#define	PRIMASK	0x0ff
-#define	PCATCH	0x100		/* OR'd with pri for tsleep to check signals */
-#define	PDROP	0x200	/* OR'd with pri to stop re-entry of interlock mutex */
+#define	PRIMASK		0x0ff
+#define	PCATCH		0x100	/* OR'd with pri for tsleep to check signals */
+#define	PDROP		0x200	/* OR'd with pri to stop re-entry of interlock mutex */
+#define	PNOLOCK		0x400	/* OR'd with pri to allow sleeping w/o a lock */
+#define	PRILASTFLAG	0x400	/* Last flag defined above */
 
 #define	NZERO	0		/* default "nice" */