6 * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; only
11 * version 2.1 of the License.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <linux/module.h>
24 #include <linux/slab.h>
25 #include <linux/sched.h>
26 #include "lttng-events.h"
27 #include "wrapper/ringbuffer/frontend_types.h"
28 #include "wrapper/vmalloc.h"
29 #include "lttng-tracer.h"
32 size_t nice_get_size(size_t offset)
36 size += lib_ring_buffer_align(offset, lttng_alignof(int));
42 void nice_record(struct lttng_ctx_field *field,
43 struct lib_ring_buffer_ctx *ctx,
44 struct lttng_channel *chan)
48 nice = task_nice(current);
49 lib_ring_buffer_align_ctx(ctx, lttng_alignof(nice));
50 chan->ops->event_write(ctx, &nice, sizeof(nice));
53 int lttng_add_nice_to_ctx(struct lttng_ctx **ctx)
55 struct lttng_ctx_field *field;
57 field = lttng_append_context(ctx);
60 if (lttng_find_context(*ctx, "nice")) {
61 lttng_remove_context_field(ctx, field);
64 field->event_field.name = "nice";
65 field->event_field.type.atype = atype_integer;
66 field->event_field.type.u.basic.integer.size = sizeof(int) * CHAR_BIT;
67 field->event_field.type.u.basic.integer.alignment = lttng_alignof(int) * CHAR_BIT;
68 field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(int);
69 field->event_field.type.u.basic.integer.reverse_byte_order = 0;
70 field->event_field.type.u.basic.integer.base = 10;
71 field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
72 field->get_size = nice_get_size;
73 field->record = nice_record;
74 wrapper_vmalloc_sync_all();
77 EXPORT_SYMBOL_GPL(lttng_add_nice_to_ctx);
79 MODULE_LICENSE("GPL and additional rights");
80 MODULE_AUTHOR("Mathieu Desnoyers");
81 MODULE_DESCRIPTION("Linux Trace Toolkit Nice Context");