root/trunk/dep/src/zthread/macos/TSS.h @ 245

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[svn] * Proper SVN structure

Original author: Neo2003
Date: 2008-10-02 16:23:55-05:00
Line 
1/*
2 * Copyright (c) 2005, Eric Crahen
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is furnished
9 * to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in all
12 * copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
18 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 */
22
23#ifndef __ZTTSS_H__
24#define __ZTTSS_H__
25
26#include "zthread/NonCopyable.h"
27#include "zthread/Exceptions.h"
28
29#include <assert.h>
30#include <CoreServices/CoreServices.h>
31//#include <Multiprocessing.h>
32
33namespace ZThread {
34
35  /**
36   * @class TSS
37   * @author Eric Crahen <http://www.code-foo.com>
38   * @date <2003-07-27T14:19:10-0400>
39   * @version 2.1.6
40   *
41   * An abstraction for dealing with POSIX thread specific storage (tss).
42   * Provides get/set and creation/destruction.
43   */
44  template <typename T>
45    class TSS : private NonCopyable {
46
47    TaskStorageIndex _key;
48
49    public:
50
51    /**
52     * Create a new object for accessing tss.
53     */
54    TSS() {
55
56      // Apple TN1071
57      static bool init = MPLibraryIsLoaded();
58   
59      if(!init || MPAllocateTaskStorageIndex(&_key) != noErr) {
60        assert(0);
61        throw Initialization_Exception();
62      }
63
64    }
65
66    /**
67     * Destroy the underlying supoprt for accessing tss with this
68     * object.
69     */
70    ~TSS() {
71 
72      OSStatus status = MPDeallocateTaskStorageIndex(_key);
73      if(status != noErr) 
74        assert(0);
75
76    }
77 
78    /**
79     * Get the value stored in tss.
80     *
81     * @return T
82     *
83     * @exception InvalidOp_exception thrown when the tss is not properly initialized
84     */
85    T get() const {
86      return reinterpret_cast<T>(MPGetTaskStorageValue(_key));
87    }
88 
89 
90    /**
91     * Store a value in tss.
92     *
93     * @param value T
94     * @return T old value
95     *
96     * @exception InvalidOp_exception thrown when the tss is not properly initialized
97     */
98    T set(T value) const {
99
100      T oldValue = get();
101
102      OSStatus status = 
103        MPSetTaskStorageValue(_key, reinterpret_cast<TaskStorageValue>(value));
104   
105      if(status != noErr) {
106        assert(0);
107        throw Synchronization_Exception();
108      }
109
110      return oldValue;
111   
112    }
113   
114  };
115
116}
117
118#endif
119
120
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