1 /* 2 * Copyright (c) 2016, 2018, 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_VM_JFR_WRITERS_JFREVENTWRITERHOST_INLINE_HPP 26 #define SHARE_VM_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>:: 33 EventWriterHost(StorageType* storage, Thread* thread) : WriterHost<BE, IE, WriterPolicyImpl>(storage, thread) {} 34 35 template <typename BE, typename IE, typename WriterPolicyImpl> 36 inline EventWriterHost<BE, IE, WriterPolicyImpl>::EventWriterHost(Thread* thread) : WriterHost<BE, IE, WriterPolicyImpl>(thread) { 37 } 38 39 template <typename BE, typename IE, typename WriterPolicyImpl> 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> 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() ? this->used_offset() : 0; 53 } 54 55 template <typename BE, typename IE, typename WriterPolicyImpl> 56 inline void EventWriterHost<BE, IE, WriterPolicyImpl>::begin_event_write() { 57 assert(this->is_valid(), "invariant"); 58 assert(!this->is_acquired(), "calling begin with writer already in acquired state!"); 59 this->begin_write(); 60 this->reserve(sizeof(u4)); // reserve the event size slot 61 } 62 63 template <typename BE, typename IE, typename WriterPolicyImpl> 64 inline intptr_t EventWriterHost<BE, IE, WriterPolicyImpl>::end_event_write() { 65 assert(this->is_acquired(), "invariant"); 66 if (!this->is_valid()) { 67 this->release(); 68 return 0; 69 } 70 const u4 written = (u4)end_write(); 71 if (written > sizeof(u4)) { // larger than header reserve 72 this->write_padded_at_offset(written, 0); 73 this->commit(); 74 } 75 this->release(); 76 assert(!this->is_acquired(), "invariant"); 77 return written; 78 } 79 80 template <typename BE, typename IE, typename WriterPolicyImpl> 81 template <typename StorageType> 82 inline StackEventWriterHost<BE, IE, WriterPolicyImpl>:: 83 StackEventWriterHost(StorageType* storage, Thread* thread) : EventWriterHost<BE, IE, WriterPolicyImpl>(storage, thread) { 84 this->begin_event_write(); 85 } 86 87 template <typename BE, typename IE, typename WriterPolicyImpl> 88 inline StackEventWriterHost<BE, IE, WriterPolicyImpl>::StackEventWriterHost(Thread* thread) : EventWriterHost<BE, IE, WriterPolicyImpl>(thread) { 89 this->begin_event_write(); 90 } 91 92 template <typename BE, typename IE, typename WriterPolicyImpl> 93 inline StackEventWriterHost<BE, IE, WriterPolicyImpl>::~StackEventWriterHost() { 94 this->end_event_write(); 95 } 96 97 #endif // SHARE_VM_JFR_WRITERS_JFREVENTWRITERHOST_INLINE_HPP