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Re: [Minios-devel] [UNIKRAFT PATCH v2 3/8] lib/uksched: Introduce thread attributes





On 1/23/19 11:59 PM, Costin Lupu wrote:
On 1/23/19 3:56 PM, Florian Schmidt wrote:
Hi Costin,

On 1/23/19 7:31 PM, Costin Lupu wrote:
Hi Florian,

On 1/23/19 10:49 AM, Florian Schmidt wrote:
Hi Costin,

I checked Felipe's comments, and I agree with your changes in v2. he
patch looks good to me, except for one minor thing:

On 1/11/19 12:22 AM, Costin Lupu wrote:
diff --git a/lib/uksched/include/uk/thread_attr.h
b/lib/uksched/include/uk/thread_attr.h
new file mode 100644
index 0000000..93dcd5c
--- /dev/null
+++ b/lib/uksched/include/uk/thread_attr.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Costin Lupu <costin.lupu@xxxxxxxxx>
+ *
+ * Copyright (c) 2019, NEC Europe Ltd., NEC Corporation. All rights
reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
copyright
+ *    notice, this list of conditions and the following disclaimer in
the
+ *    documentation and/or other materials provided with the
distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+
+#ifndef __UK_SCHED_THREAD_ATTR_H__
+#define __UK_SCHED_THREAD_ATTR_H__
+
+#include <uk/arch/time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define UK_THREAD_ATTR_WAITABLE         0
+#define UK_THREAD_ATTR_DETACHED         1
+
+#define UK_THREAD_ATTR_PRIO_INVALID     (-1)
+#define UK_THREAD_ATTR_PRIO_MIN         0
+#define UK_THREAD_ATTR_PRIO_MAX         255
+#define UK_THREAD_ATTR_PRIO_DEFAULT     127
+
+#define UK_THREAD_ATTR_TIMESLICE_NIL    0
+
+typedef int prio_t;
+
+typedef struct uk_thread_attr {
+    /**< Is non-zero if thread should detach */
+    int is_detached;
+    /**< Priority */
+    prio_t prio;
+    /**< Time slice in nanoseconds */

Is there some reason for this comment style? (double-asterisk and
less-than)

Yeah, this was initially copied from 'common/include/pci/pci_bus.h' and
'common/pci_bus.c' and it was also propagated to Xenbus source code.

I see. But I guess since it's now in unikraft, we can use our own
comment style, right?


The files where that was copied from *are in Unikraft*. Where can I find
the documentation of our comment style?

Oh, I see, sorry, I misread that.
Hm. I find this pretty ugly (it almost looks like some weird comment style to be machine parsed), but if you really prefer to keep it like that, I won't argue with it over my dead body. just pointed it out because I figured, if we're going to a v3 anyway, this might be a quick thing to change on the drive-by.

Florian

--
Dr. Florian Schmidt
フローリアン・シュミット
Research Scientist,
Systems and Machine Learning Group
NEC Laboratories Europe
Kurfürsten-Anlage 36, D-69115 Heidelberg
Tel.     +49 (0)6221 4342-265
Fax:     +49 (0)6221 4342-155
e-mail:  florian.schmidt@xxxxxxxxx
============================================================
Registered at Amtsgericht Mannheim, Germany, HRB728558

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