Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/runtime/threadCritical.hpp@98cb887364d3 (annotated)
src/share/vm/runtime/threadCritical.hpp
Fri, 27 Feb 2009 13:27:09 -0800
- author
- twisti
- date
- Fri, 27 Feb 2009 13:27:09 -0800
- changeset 1040
- 98cb887364d3
- parent 435
- a61af66fc99e
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6810672: Comment typos
Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never
| duke@435 | 1 | /* |
| duke@435 | 2 | * Copyright 2001-2002 Sun Microsystems, Inc. All Rights Reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| duke@435 | 21 | * have any questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| duke@435 | 25 | // ThreadCritical is used to protect short non-blocking critical sections. |
| duke@435 | 26 | // This class must use no vm facilities that require initialization. |
| duke@435 | 27 | // It is used very early in the vm's initialization, in allocation |
| duke@435 | 28 | // code and other areas. ThreadCritical regions are reentrant. |
| duke@435 | 29 | // |
| duke@435 | 30 | // Due to race conditions during vm exit, some of the os level |
| duke@435 | 31 | // synchronization primitives may not be deallocated at exit. It |
| twisti@1040 | 32 | // is a good plan to implement the platform dependent sections of |
| duke@435 | 33 | // code with resources that are recoverable during process |
| duke@435 | 34 | // cleanup by the os. Calling the initialize method before use |
| duke@435 | 35 | // is also problematic, it is best to use preinitialized primitives |
| duke@435 | 36 | // if possible. As an example: |
| duke@435 | 37 | // |
| duke@435 | 38 | // mutex_t mp = DEFAULTMUTEX; |
| duke@435 | 39 | // |
| duke@435 | 40 | // Also note that this class is declared as a StackObj to enforce |
| duke@435 | 41 | // block structured short locks. It cannot be declared a ResourceObj |
| duke@435 | 42 | // or CHeapObj, due to initialization issues. |
| duke@435 | 43 | |
| duke@435 | 44 | class ThreadCritical : public StackObj { |
| duke@435 | 45 | friend class os; |
| duke@435 | 46 | private: |
| duke@435 | 47 | static void initialize(); |
| duke@435 | 48 | static void release(); |
| duke@435 | 49 | |
| duke@435 | 50 | public: |
| duke@435 | 51 | ThreadCritical(); |
| duke@435 | 52 | ~ThreadCritical(); |
| duke@435 | 53 | }; |
