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Root/branches/xZenu/src/util/doxygen/qtools/qwaitcondition_win32.cpp

Source at commit 1406 created 12 years 10 months ago.
By meklort, Revert drivers.c so that kexts are only loaded when OSBundleRequired is set and that value is not safe mode. Added some comments about it too.
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41␊
42#include <windows.h>␊
43#include "qwaitcondition.h"␊
44#include "qmutex.h"␊
45#include "qlist.h"␊
46␊
47//***********************************************************************␊
48// QWaitConditionPrivate␊
49// **********************************************************************␊
50␊
51class QWaitConditionEvent␊
52{␊
53public:␊
54 QWaitConditionEvent() : priority(0), wokenUp(false)␊
55 {␊
56 event = CreateEvent(NULL, TRUE, FALSE, NULL);␊
57 }␊
58 ~QWaitConditionEvent() { CloseHandle(event); }␊
59 int priority;␊
60 bool wokenUp;␊
61 HANDLE event;␊
62};␊
63␊
64class EventQueue : public QList<QWaitConditionEvent>␊
65{␊
66 public:␊
67 EventQueue() { setAutoDelete(TRUE); }␊
68 ~EventQueue() {}␊
69};␊
70␊
71class QWaitConditionPrivate␊
72{␊
73public:␊
74 QMutex mtx;␊
75 EventQueue queue;␊
76 EventQueue freeQueue;␊
77␊
78 QWaitConditionEvent *pre();␊
79 void wait(QWaitConditionEvent *wce);␊
80 void post(QWaitConditionEvent *wce);␊
81};␊
82␊
83QWaitConditionEvent *QWaitConditionPrivate::pre()␊
84{␊
85 mtx.lock();␊
86 QWaitConditionEvent *wce =␊
87 freeQueue.isEmpty() ? new QWaitConditionEvent : freeQueue.take(0);␊
88 wce->priority = GetThreadPriority(GetCurrentThread());␊
89 wce->wokenUp = FALSE;␊
90␊
91 // insert 'wce' into the queue (sorted by priority)␊
92 uint index = 0;␊
93 for (; index < queue.count(); ++index)␊
94 {␊
95 QWaitConditionEvent *current = queue.at(index);␊
96 if (current->priority < wce->priority)␊
97 break;␊
98 }␊
99 queue.insert(index, wce);␊
100 mtx.unlock();␊
101␊
102 return wce;␊
103}␊
104␊
105void QWaitConditionPrivate::wait(QWaitConditionEvent *wce)␊
106{␊
107 WaitForSingleObject(wce->event, INFINITE);␊
108}␊
109␊
110void QWaitConditionPrivate::post(QWaitConditionEvent *wce)␊
111{␊
112 mtx.lock();␊
113␊
114 // remove 'wce' from the queue␊
115 int idx = queue.find(wce);␊
116 ASSERT(idx!=-1);␊
117 queue.take(idx);␊
118 ResetEvent(wce->event);␊
119 freeQueue.append(wce);␊
120␊
121 // wakeups delivered after the timeout should be forwarded to the next waiter␊
122 if (wce->wokenUp && !queue.isEmpty())␊
123 {␊
124 QWaitConditionEvent *other = queue.getFirst();␊
125 SetEvent(other->event);␊
126 other->wokenUp = TRUE;␊
127 }␊
128␊
129 mtx.unlock();␊
130}␊
131␊
132//***********************************************************************␊
133// QWaitCondition implementation␊
134//***********************************************************************␊
135␊
136QWaitCondition::QWaitCondition()␊
137{␊
138 d = new QWaitConditionPrivate;␊
139}␊
140␊
141QWaitCondition::~QWaitCondition()␊
142{␊
143 if (!d->queue.isEmpty())␊
144 {␊
145 qWarning("QWaitCondition: Destroyed while threads are still waiting");␊
146 }␊
147 delete d;␊
148}␊
149␊
150void QWaitCondition::wait(QMutex *mutex)␊
151{␊
152 if (!mutex) return;␊
153␊
154 QWaitConditionEvent *wce = d->pre();␊
155 mutex->unlock();␊
156 d->wait(wce);␊
157 mutex->lock();␊
158 d->post(wce);␊
159}␊
160␊
161void QWaitCondition::wakeOne()␊
162{␊
163 // wake up the first waiting thread in the queue␊
164 QMutexLocker locker(&d->mtx);␊
165 for (uint i = 0; i < d->queue.count(); ++i)␊
166 {␊
167 QWaitConditionEvent *current = d->queue.at(i);␊
168 if (current->wokenUp) continue;␊
169 SetEvent(current->event);␊
170 current->wokenUp = TRUE;␊
171 break;␊
172 }␊
173}␊
174␊
175void QWaitCondition::wakeAll()␊
176{␊
177 // wake up the all threads in the queue␊
178 QMutexLocker locker(&d->mtx);␊
179 for (uint i = 0; i < d->queue.count(); ++i) ␊
180 {␊
181 QWaitConditionEvent *current = d->queue.at(i);␊
182 SetEvent(current->event);␊
183 current->wokenUp = TRUE;␊
184 }␊
185}␊
186␊
187

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