Cleanup: Move lib/ringbuffer/ headers to include/ringbuffer/

[lttng-modules.git] / lttng-context-tid.c

diff --git a/lttng-context-tid.c b/lttng-context-tid.c
index f207d986af5bbf15f979d27c254701d35b5c7e8b..144b081bc2bc7b1a6817b429a936cd79256aace5 100644 (file)
--- a/lttng-context-tid.c
+++ b/lttng-context-tid.c
@@ -1,26 +1,26 @@
-/*
- * (C) Copyright       2009-2011 -
- *             Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
+ *
+ * lttng-context-tid.c
  *
  * LTTng TID context.
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  */
 
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
-#include "ltt-events.h"
-#include "wrapper/ringbuffer/frontend_types.h"
-#include "wrapper/vmalloc.h"
-#include "ltt-tracer.h"
+#include <lttng-events.h>
+#include <ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <lttng-tracer.h>
 
 static
 size_t tid_get_size(size_t offset)
 {
        size_t size = 0;
 
-       size += lib_ring_buffer_align(offset, ltt_alignof(pid_t));
+       size += lib_ring_buffer_align(offset, lttng_alignof(pid_t));
        size += sizeof(pid_t);
        return size;
 }
@@ -28,15 +28,26 @@ size_t tid_get_size(size_t offset)
 static
 void tid_record(struct lttng_ctx_field *field,
                 struct lib_ring_buffer_ctx *ctx,
-                struct ltt_channel *chan)
+                struct lttng_channel *chan)
 {
        pid_t tid;
 
        tid = task_pid_nr(current);
-       lib_ring_buffer_align_ctx(ctx, ltt_alignof(tid));
+       lib_ring_buffer_align_ctx(ctx, lttng_alignof(tid));
        chan->ops->event_write(ctx, &tid, sizeof(tid));
 }
 
+static
+void tid_get_value(struct lttng_ctx_field *field,
+               struct lttng_probe_ctx *lttng_probe_ctx,
+               union lttng_ctx_value *value)
+{
+       pid_t tid;
+
+       tid = task_pid_nr(current);
+       value->s64 = tid;
+}
+
 int lttng_add_tid_to_ctx(struct lttng_ctx **ctx)
 {
        struct lttng_ctx_field *field;
@@ -44,21 +55,23 @@ int lttng_add_tid_to_ctx(struct lttng_ctx **ctx)
        field = lttng_append_context(ctx);
        if (!field)
                return -ENOMEM;
+       if (lttng_find_context(*ctx, "tid")) {
+               lttng_remove_context_field(ctx, field);
+               return -EEXIST;
+       }
        field->event_field.name = "tid";
        field->event_field.type.atype = atype_integer;
-       field->event_field.type.u.basic.integer.size = sizeof(pid_t) * CHAR_BIT;
-       field->event_field.type.u.basic.integer.alignment = ltt_alignof(pid_t) * CHAR_BIT;
-       field->event_field.type.u.basic.integer.signedness = is_signed_type(pid_t);
-       field->event_field.type.u.basic.integer.reverse_byte_order = 0;
-       field->event_field.type.u.basic.integer.base = 10;
-       field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
+       field->event_field.type.u.integer.size = sizeof(pid_t) * CHAR_BIT;
+       field->event_field.type.u.integer.alignment = lttng_alignof(pid_t) * CHAR_BIT;
+       field->event_field.type.u.integer.signedness = lttng_is_signed_type(pid_t);
+       field->event_field.type.u.integer.reverse_byte_order = 0;
+       field->event_field.type.u.integer.base = 10;
+       field->event_field.type.u.integer.encoding = lttng_encode_none;
        field->get_size = tid_get_size;
        field->record = tid_record;
-       wrapper_vmalloc_sync_all();
+       field->get_value = tid_get_value;
+       lttng_context_update(*ctx);
+       wrapper_vmalloc_sync_mappings();
        return 0;
 }
 EXPORT_SYMBOL_GPL(lttng_add_tid_to_ctx);
-
-MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit TID Context");