Module Name:    src
Committed By:   kamil
Date:           Sat Aug 10 15:02:03 UTC 2019

Modified Files:
        src/sys/sys: event.h

Log Message:
Handle more corner cases in sys/event.h for C++ EV_SET()

Handle the udata argument as Plain-Old-Data types separately.

 - int, long int, long long int
 - unsigned int, unsigned long int, unsigned long long int
 - void *

This approach handles each of the POD types separately on purpose as
intermediate types such as intptr_t can be either int or long (even long
long) and handling them is not portable.

This approach is compatibile with C++98 and newer.

Fixes i386 usage.


To generate a diff of this commit:
cvs rdiff -u -r1.34 -r1.35 src/sys/sys/event.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Modified files:

Index: src/sys/sys/event.h
diff -u src/sys/sys/event.h:1.34 src/sys/sys/event.h:1.35
--- src/sys/sys/event.h:1.34	Sat Aug 10 11:20:50 2019
+++ src/sys/sys/event.h	Sat Aug 10 15:02:03 2019
@@ -1,4 +1,4 @@
-/*	$NetBSD: event.h,v 1.34 2019/08/10 11:20:50 kamil Exp $	*/
+/*	$NetBSD: event.h,v 1.35 2019/08/10 15:02:03 kamil Exp $	*/
 
 /*-
  * Copyright (c) 1999,2000,2001 Jonathan Lemon <jle...@freebsd.org>
@@ -55,39 +55,89 @@ struct kevent {
 	intptr_t	udata;		/* opaque user data identifier */
 };
 
+#ifdef __cplusplus
+#define EV_SET(kevp, ident, filter, flags, fflags, data, udata)	\
+    _EV_SET((kevp), __CAST(uintptr_t, (ident)), (filter), (flags), \
+    (fflags), (data), (udata))
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion-null"
+
 static __inline void
 _EV_SET(struct kevent *_kevp, uintptr_t _ident, uint32_t _filter,
-    uint32_t _flags, uint32_t _fflags, int64_t _data, intptr_t _udata)
+    uint32_t _flags, uint32_t _fflags, int64_t _data, void *_udata)
 {
 	_kevp->ident = _ident;
 	_kevp->filter = _filter;
 	_kevp->flags = _flags;
 	_kevp->fflags = _fflags;
 	_kevp->data = _data;
-	_kevp->udata = _udata;
+	_kevp->udata = reinterpret_cast<intptr_t>(_udata);
 }
 
-#ifdef __cplusplus
-#define EV_SET(kevp, ident, filter, flags, fflags, data, udata)	\
-    _EV_SET((kevp), __CAST(uintptr_t, (ident)), (filter), (flags), \
-    (fflags), (data), (udata))
+static __inline void
+_EV_SET(struct kevent *_kevp, uintptr_t _ident, uint32_t _filter,
+    uint32_t _flags, uint32_t _fflags, int64_t _data, int _udata)
+{
+	_EV_SET(_kevp, _ident, _filter, _flags, _fflags, _data,
+	    reinterpret_cast<void *>(static_cast<intptr_t>(_udata)));
+}
 
 static __inline void
 _EV_SET(struct kevent *_kevp, uintptr_t _ident, uint32_t _filter,
-    uint32_t _flags, uint32_t _fflags, int64_t _data, void *_udata)
+    uint32_t _flags, uint32_t _fflags, int64_t _data, long int _udata)
 {
 	_EV_SET(_kevp, _ident, _filter, _flags, _fflags, _data,
-	    reinterpret_cast<intptr_t>(_udata));
+	    reinterpret_cast<void *>(static_cast<intptr_t>(_udata)));
 }
 
 static __inline void
 _EV_SET(struct kevent *_kevp, uintptr_t _ident, uint32_t _filter,
-    uint32_t _flags, uint32_t _fflags, int64_t _data, int _udata)
+    uint32_t _flags, uint32_t _fflags, int64_t _data, long long int _udata)
+{
+	_EV_SET(_kevp, _ident, _filter, _flags, _fflags, _data,
+	    reinterpret_cast<void *>(static_cast<intptr_t>(_udata)));
+}
+
+static __inline void
+_EV_SET(struct kevent *_kevp, uintptr_t _ident, uint32_t _filter,
+    uint32_t _flags, uint32_t _fflags, int64_t _data, unsigned int _udata)
+{
+	_EV_SET(_kevp, _ident, _filter, _flags, _fflags, _data,
+	    reinterpret_cast<void *>(static_cast<intptr_t>(_udata)));
+}
+
+static __inline void
+_EV_SET(struct kevent *_kevp, uintptr_t _ident, uint32_t _filter,
+    uint32_t _flags, uint32_t _fflags, int64_t _data, unsigned long int _udata)
+{
+	_EV_SET(_kevp, _ident, _filter, _flags, _fflags, _data,
+	    reinterpret_cast<void *>(static_cast<intptr_t>(_udata)));
+}
+
+static __inline void
+_EV_SET(struct kevent *_kevp, uintptr_t _ident, uint32_t _filter,
+    uint32_t _flags, uint32_t _fflags, int64_t _data,
+    unsigned long long int _udata)
 {
 	_EV_SET(_kevp, _ident, _filter, _flags, _fflags, _data,
-	    static_cast<intptr_t>(_udata));
+	    reinterpret_cast<void *>(static_cast<intptr_t>(_udata)));
 }
+
+#pragma GCC diagnistic pop
 #else
+static __inline void
+_EV_SET(struct kevent *_kevp, uintptr_t _ident, uint32_t _filter,
+    uint32_t _flags, uint32_t _fflags, int64_t _data, intptr_t _udata)
+{
+	_kevp->ident = _ident;
+	_kevp->filter = _filter;
+	_kevp->flags = _flags;
+	_kevp->fflags = _fflags;
+	_kevp->data = _data;
+	_kevp->udata = _udata;
+}
+
 #define EV_SET(kevp, ident, filter, flags, fflags, data, udata)	\
     _EV_SET((kevp), __CAST(uintptr_t, (ident)), (filter), (flags), \
     (fflags), (data), __CAST(intptr_t, (udata)))

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