1 /*
2 * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_JFR_WRITERS_JFREVENTWRITERHOST_INLINE_HPP
26 #define SHARE_JFR_WRITERS_JFREVENTWRITERHOST_INLINE_HPP
27
28 #include "jfr/writers/jfrEventWriterHost.hpp"
29
30 template <typename BE, typename IE, typename WriterPolicyImpl>
31 template <typename StorageType>
32 inline EventWriterHost<BE, IE, WriterPolicyImpl>::
EventWriterHost(StorageType * storage,Thread * thread)33 EventWriterHost(StorageType* storage, Thread* thread) : WriterHost<BE, IE, WriterPolicyImpl>(storage, thread) {}
34
35 template <typename BE, typename IE, typename WriterPolicyImpl>
EventWriterHost(Thread * thread)36 inline EventWriterHost<BE, IE, WriterPolicyImpl>::EventWriterHost(Thread* thread) : WriterHost<BE, IE, WriterPolicyImpl>(thread) {
37 }
38
39 template <typename BE, typename IE, typename WriterPolicyImpl>
begin_write()40 inline void EventWriterHost<BE, IE, WriterPolicyImpl>::begin_write() {
41 assert(this->is_valid(), "invariant");
42 assert(!this->is_acquired(), "calling begin with writer already in acquired state!");
43 this->acquire();
44 assert(this->used_offset() == 0, "invariant");
45 assert(this->is_acquired(), "invariant");
46 }
47
48 template <typename BE, typename IE, typename WriterPolicyImpl>
end_write(void)49 inline intptr_t EventWriterHost<BE, IE, WriterPolicyImpl>::end_write(void) {
50 assert(this->is_acquired(),
51 "state corruption, calling end with writer with non-acquired state!");
52 return this->is_valid() ? (intptr_t)this->used_offset() : 0;
53 }
54
55 template <typename BE, typename IE, typename WriterPolicyImpl>
begin_event_write(bool large)56 inline void EventWriterHost<BE, IE, WriterPolicyImpl>::begin_event_write(bool large) {
57 assert(this->is_valid(), "invariant");
58 assert(!this->is_acquired(), "calling begin with writer already in acquired state!");
59 this->begin_write();
60 // reserve the event size slot
61 if (large) {
62 this->reserve(sizeof(u4));
63 } else {
64 this->reserve(sizeof(u1));
65 }
66 }
67
68 template <typename BE, typename IE, typename WriterPolicyImpl>
end_event_write(bool large)69 inline intptr_t EventWriterHost<BE, IE, WriterPolicyImpl>::end_event_write(bool large) {
70 assert(this->is_acquired(), "invariant");
71 if (!this->is_valid()) {
72 this->release();
73 return 0;
74 }
75 u4 written = (u4)end_write();
76 if (large) {
77 // size written is larger than header reserve, so commit
78 if (written > sizeof(u4)) {
79 this->write_padded_at_offset(written, 0);
80 this->commit();
81 }
82 } else {
83 // abort if event size will not fit in one byte (compressed)
84 if (written > 127) {
85 this->reset();
86 written = 0;
87 } else {
88 // size written is larger than header reserve, so commit
89 if (written > sizeof(u1)) {
90 this->write_at_offset(written, 0);
91 this->commit();
92 }
93 }
94 }
95 this->release();
96 assert(!this->is_acquired(), "invariant");
97 return written;
98 }
99 #endif // SHARE_JFR_WRITERS_JFREVENTWRITERHOST_INLINE_HPP
100