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