Mercurial > hg > truffle
annotate src/share/vm/runtime/threadCritical.hpp @ 1604:b918d354830a
6960865: ldc of unloaded class throws an assert in ciTypeFlow
Summary: Support java_mirror for unloaded klasses, arrays as well as instances. Simplify ciTypeFlow by removing unused path.
Reviewed-by: kvn
author | jrose |
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date | Sat, 12 Jun 2010 22:53:43 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
605
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
605
diff
changeset
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
605
diff
changeset
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // ThreadCritical is used to protect short non-blocking critical sections. | |
26 // This class must use no vm facilities that require initialization. | |
27 // It is used very early in the vm's initialization, in allocation | |
28 // code and other areas. ThreadCritical regions are reentrant. | |
29 // | |
30 // Due to race conditions during vm exit, some of the os level | |
31 // synchronization primitives may not be deallocated at exit. It | |
605 | 32 // is a good plan to implement the platform dependent sections of |
0 | 33 // code with resources that are recoverable during process |
34 // cleanup by the os. Calling the initialize method before use | |
35 // is also problematic, it is best to use preinitialized primitives | |
36 // if possible. As an example: | |
37 // | |
38 // mutex_t mp = DEFAULTMUTEX; | |
39 // | |
40 // Also note that this class is declared as a StackObj to enforce | |
41 // block structured short locks. It cannot be declared a ResourceObj | |
42 // or CHeapObj, due to initialization issues. | |
43 | |
44 class ThreadCritical : public StackObj { | |
45 friend class os; | |
46 private: | |
47 static void initialize(); | |
48 static void release(); | |
49 | |
50 public: | |
51 ThreadCritical(); | |
52 ~ThreadCritical(); | |
53 }; |