jdk8-mips64-public/hotspot: src/share/vm/jfr/recorder/storage/jfrStorageUtils.inline.hpp@d2c2cd90513e

     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

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    25 #ifndef SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_INLINE_HPP

    26 #define SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_INLINE_HPP

    28 #include "jfr/recorder/storage/jfrStorageUtils.hpp"

    29 #include "runtime/thread.inline.hpp"

    31 template <typename T>

    32 inline bool UnBufferedWriteToChunk<T>::write(T* t, const u1* data, size_t size) {

    33   _writer.write_unbuffered(data, size);

    34   _processed += size;

    35   return true;

    36 }

    38 template <typename T>

    39 inline bool DefaultDiscarder<T>::discard(T* t, const u1* data, size_t size) {

    40   _processed += size;

    41   return true;

    42 }

    44 template <typename Operation>

    45 inline bool ConcurrentWriteOp<Operation>::process(typename Operation::Type* t) {

    46   const u1* const current_top = t->concurrent_top();

    47   const size_t unflushed_size = t->pos() - current_top;

    48   if (unflushed_size == 0) {

    49     t->set_concurrent_top(current_top);

    50     return true;

    51   }

    52   const bool result = _operation.write(t, current_top, unflushed_size);

    53   t->set_concurrent_top(current_top + unflushed_size);

    54   return result;

    55 }

    57 template <typename Operation>

    58 inline bool ConcurrentWriteOpExcludeRetired<Operation>::process(typename Operation::Type* t) {

    59   if (t->retired()) {

    60     assert(t->empty(), "invariant");

    61     return true;

    62   }

    63   return ConcurrentWriteOp<Operation>::process(t);

    64 }

    66 template <typename Operation>

    67 inline bool MutexedWriteOp<Operation>::process(typename Operation::Type* t) {

    68   assert(t != NULL, "invariant");

    69   const u1* const current_top = t->top();

    70   const size_t unflushed_size = t->pos() - current_top;

    71   if (unflushed_size == 0) {

    72     return true;

    73   }

    74   const bool result = _operation.write(t, current_top, unflushed_size);

    75   t->set_top(current_top + unflushed_size);

    76   return result;

    77 }

    79 template <typename Type>

    80 static void retired_sensitive_acquire(Type* t) {

    81   assert(t != NULL, "invariant");

    82   if (t->retired()) {

    83     return;

    84   }

    85   Thread* const thread = Thread::current();

    86   while (!t->try_acquire(thread)) {

    87     if (t->retired()) {

    88       return;

    89     }

    90   }

    91 }

    93 template <typename Operation>

    94 inline bool ExclusiveOp<Operation>::process(typename Operation::Type* t) {

    95   retired_sensitive_acquire(t);

    96   assert(t->acquired_by_self() || t->retired(), "invariant");

    97   // User is required to ensure proper release of the acquisition

    98   return MutexedWriteOp<Operation>::process(t);

    99 }

   101 template <typename Operation>

   102 inline bool DiscardOp<Operation>::process(typename Operation::Type* t) {

   103   assert(t != NULL, "invariant");

   104   const u1* const current_top = _mode == concurrent ? t->concurrent_top() : t->top();

   105   const size_t unflushed_size = t->pos() - current_top;

   106   if (unflushed_size == 0) {

   107     if (_mode == concurrent) {

   108       t->set_concurrent_top(current_top);

   109     }

   110     return true;

   111   }

   112   const bool result = _operation.discard(t, current_top, unflushed_size);

   113   if (_mode == concurrent) {

   114     t->set_concurrent_top(current_top + unflushed_size);

   115   } else {

   116     t->set_top(current_top + unflushed_size);

   117   }

   118   return result;

   119 }

   121 #endif // SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_INLINE_HPP

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