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annotate agent/src/os/win32/Reaper.hpp @ 1631:56cc7e01da2f
Added tag hs19-b03 for changeset ad1977f08c4d
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date | Fri, 09 Jul 2010 00:31:01 -0700 |
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2 * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #ifndef _REAPER_ | |
26 #define _REAPER_ | |
27 | |
28 #include <vector> | |
29 #include <windows.h> | |
30 | |
31 typedef void ReaperCB(void* userData); | |
32 | |
33 /** A Reaper maintains a thread which waits for child processes to | |
34 terminate; upon termination it calls a user-specified ReaperCB to | |
35 clean up resources associated with those child processes. */ | |
36 | |
37 class Reaper { | |
38 private: | |
39 Reaper& operator=(const Reaper&); | |
40 Reaper(const Reaper&); | |
41 | |
42 public: | |
43 Reaper(ReaperCB*); | |
44 ~Reaper(); | |
45 | |
46 // Start the reaper thread. | |
47 bool start(); | |
48 | |
49 // Stop the reaper thread. This is called automatically in the | |
50 // reaper's destructor. It is not thread safe and should be called | |
51 // by at most one thread at a time. | |
52 bool stop(); | |
53 | |
54 // Register a given child process with the reaper. This should be | |
55 // called by the application's main thread. When that process | |
56 // terminates, the cleanup callback will be called with the | |
57 // specified userData in the context of the reaper thread. Callbacks | |
58 // are guaranteed to be called serially, so they can safely refer to | |
59 // static data as well as the given user data. | |
60 void registerProcess(HANDLE processHandle, void* userData); | |
61 | |
62 private: | |
63 // For thread safety of register() | |
64 CRITICAL_SECTION crit; | |
65 | |
66 ReaperCB* cb; | |
67 | |
68 // State variables | |
69 volatile bool active; | |
70 volatile bool shouldShutDown; | |
71 | |
72 struct ProcessInfo { | |
73 HANDLE handle; | |
74 void* userData; | |
75 }; | |
76 | |
77 // Bookkeeping | |
78 std::vector<ProcessInfo> procInfo; | |
79 | |
80 // Synchronization between application thread and reaper thread | |
81 HANDLE event; | |
82 | |
83 // Entry point for reaper thread | |
84 void reaperThread(); | |
85 | |
86 // Static function which is actual thread entry point | |
87 static DWORD WINAPI reaperThreadEntry(LPVOID data); | |
88 }; | |
89 | |
90 #endif // #defined _REAPER_ |