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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/unix/timerunx.cpp | |
3 | // Purpose: wxTimer implementation for non-GUI applications under Unix | |
4 | // Author: Lukasz Michalski | |
5 | // Created: 15/01/2005 | |
6 | // RCS-ID: $Id$ | |
7 | // Copyright: (c) 2007 Lukasz Michalski | |
8 | // Licence: wxWindows licence | |
9 | ///////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | // ============================================================================ | |
12 | // declarations | |
13 | // ============================================================================ | |
14 | ||
15 | // ---------------------------------------------------------------------------- | |
16 | // headers | |
17 | // ---------------------------------------------------------------------------- | |
18 | ||
19 | #include "wx/wxprec.h" | |
20 | ||
21 | #if wxUSE_TIMER | |
22 | ||
23 | #ifndef WX_PRECOMP | |
24 | #include "wx/log.h" | |
25 | #include "wx/module.h" | |
26 | #include "wx/app.h" | |
27 | #include "wx/list.h" | |
28 | #include "wx/hashmap.h" | |
29 | #include "wx/event.h" | |
30 | #endif | |
31 | ||
32 | #include "wx/longlong.h" | |
33 | ||
34 | #include <sys/time.h> | |
35 | #include <signal.h> | |
36 | ||
37 | #include "wx/unix/private/timer.h" | |
38 | ||
39 | #include "wx/listimpl.cpp" | |
40 | WX_DEFINE_LIST(wxTimerList); | |
41 | ||
42 | // trace mask for the debugging messages used here | |
43 | #define wxTrace_Timer wxT("timer") | |
44 | ||
45 | // ---------------------------------------------------------------------------- | |
46 | // local functions | |
47 | // ---------------------------------------------------------------------------- | |
48 | ||
49 | // helper function to format wxUsecClock_t | |
50 | static inline wxString wxUsecClockAsString(wxUsecClock_t usec) | |
51 | { | |
52 | #if wxUSE_LONGLONG | |
53 | return usec.ToString(); | |
54 | #else // wxUsecClock_t == double | |
55 | return wxString::Format(_T("%.0f"), usec); | |
56 | #endif | |
57 | } | |
58 | ||
59 | // ============================================================================ | |
60 | // wxTimerScheduler implementation | |
61 | // ============================================================================ | |
62 | ||
63 | wxTimerScheduler *wxTimerScheduler::ms_instance = NULL; | |
64 | ||
65 | wxTimerScheduler::~wxTimerScheduler() | |
66 | { | |
67 | for ( wxTimerList::iterator node = m_timers.begin(); | |
68 | node != m_timers.end(); | |
69 | ++node ) | |
70 | { | |
71 | delete *node; | |
72 | } | |
73 | } | |
74 | ||
75 | void wxTimerScheduler::AddTimer(wxUnixTimerImpl *timer, wxUsecClock_t expiration) | |
76 | { | |
77 | DoAddTimer(new wxTimerSchedule(timer, expiration)); | |
78 | } | |
79 | ||
80 | void wxTimerScheduler::DoAddTimer(wxTimerSchedule *s) | |
81 | { | |
82 | // do an insertion sort to keep the list sorted in expiration order | |
83 | wxTimerList::iterator node; | |
84 | for ( node = m_timers.begin(); node != m_timers.end(); ++node ) | |
85 | { | |
86 | wxASSERT_MSG( (*node)->m_timer != s->m_timer, | |
87 | _T("adding the same timer twice?") ); | |
88 | ||
89 | if ( (*node)->m_expiration > s->m_expiration ) | |
90 | break; | |
91 | } | |
92 | ||
93 | m_timers.insert(node, s); | |
94 | ||
95 | wxLogTrace(wxTrace_Timer, wxT("Inserted timer %d expiring at %s"), | |
96 | s->m_timer->GetId(), | |
97 | wxUsecClockAsString(s->m_expiration).c_str()); | |
98 | } | |
99 | ||
100 | void wxTimerScheduler::RemoveTimer(wxUnixTimerImpl *timer) | |
101 | { | |
102 | wxLogTrace(wxTrace_Timer, wxT("Removing timer %d"), timer->GetId()); | |
103 | ||
104 | for ( wxTimerList::iterator node = m_timers.begin(); | |
105 | node != m_timers.end(); | |
106 | ++node ) | |
107 | { | |
108 | if ( (*node)->m_timer == timer ) | |
109 | { | |
110 | delete *node; | |
111 | m_timers.erase(node); | |
112 | return; | |
113 | } | |
114 | } | |
115 | ||
116 | wxFAIL_MSG( _T("removing inexistent timer?") ); | |
117 | } | |
118 | ||
119 | bool wxTimerScheduler::GetNext(wxUsecClock_t *remaining) const | |
120 | { | |
121 | if ( m_timers.empty() ) | |
122 | return false; | |
123 | ||
124 | wxCHECK_MSG( remaining, false, _T("NULL pointer") ); | |
125 | ||
126 | *remaining = (*m_timers.begin())->m_expiration - wxGetLocalTimeUsec(); | |
127 | if ( *remaining < 0 ) | |
128 | { | |
129 | // timer already expired, don't wait at all before notifying it | |
130 | *remaining = 0; | |
131 | } | |
132 | ||
133 | return true; | |
134 | } | |
135 | ||
136 | void wxTimerScheduler::NotifyExpired() | |
137 | { | |
138 | if ( m_timers.empty() ) | |
139 | return; | |
140 | ||
141 | const wxUsecClock_t now = wxGetLocalTimeUsec(); | |
142 | ||
143 | wxTimerList::iterator cur, | |
144 | next; | |
145 | for ( cur = m_timers.begin(); cur != m_timers.end(); cur = next ) | |
146 | { | |
147 | wxTimerSchedule * const s = *cur; | |
148 | if ( s->m_expiration > now ) | |
149 | { | |
150 | // as the list is sorted by expiration time, we can skip the rest | |
151 | break; | |
152 | } | |
153 | ||
154 | // remember next as we will delete the node pointed to by cur | |
155 | next = cur; | |
156 | ++next; | |
157 | ||
158 | m_timers.erase(cur); | |
159 | ||
160 | // check whether we need to keep this timer | |
161 | wxUnixTimerImpl * const timer = s->m_timer; | |
162 | if ( timer->IsOneShot() ) | |
163 | { | |
164 | // the timer needs to be stopped but don't call its Stop() from | |
165 | // here as it would attempt to remove the timer from our list and | |
166 | // we had already done it, so we just need to reset its state | |
167 | timer->MarkStopped(); | |
168 | ||
169 | // don't need it any more | |
170 | delete s; | |
171 | } | |
172 | else // reschedule the next timer expiration | |
173 | { | |
174 | s->m_expiration += timer->GetInterval()*1000; | |
175 | DoAddTimer(s); | |
176 | } | |
177 | ||
178 | // and finally notify the timer | |
179 | timer->Notify(); | |
180 | } | |
181 | } | |
182 | ||
183 | // ============================================================================ | |
184 | // wxUnixTimerImpl implementation | |
185 | // ============================================================================ | |
186 | ||
187 | wxUnixTimerImpl::wxUnixTimerImpl(wxTimer* timer) | |
188 | : wxTimerImpl(timer) | |
189 | { | |
190 | m_isRunning = false; | |
191 | } | |
192 | ||
193 | bool wxUnixTimerImpl::Start(int milliseconds, bool oneShot) | |
194 | { | |
195 | // notice that this will stop an already running timer | |
196 | wxTimerImpl::Start(milliseconds, oneShot); | |
197 | ||
198 | wxTimerScheduler::Get().AddTimer(this, wxGetLocalTimeUsec() + m_milli*1000); | |
199 | m_isRunning = true; | |
200 | ||
201 | return true; | |
202 | } | |
203 | ||
204 | void wxUnixTimerImpl::Stop() | |
205 | { | |
206 | if ( m_isRunning ) | |
207 | { | |
208 | wxTimerScheduler::Get().RemoveTimer(this); | |
209 | ||
210 | m_isRunning = false; | |
211 | } | |
212 | } | |
213 | ||
214 | bool wxUnixTimerImpl::IsRunning() const | |
215 | { | |
216 | return m_isRunning; | |
217 | } | |
218 | ||
219 | wxUnixTimerImpl::~wxUnixTimerImpl() | |
220 | { | |
221 | wxASSERT_MSG( !m_isRunning, _T("must have been stopped before") ); | |
222 | } | |
223 | ||
224 | // ============================================================================ | |
225 | // wxTimerUnixModule: responsible for freeing the global timer scheduler | |
226 | // ============================================================================ | |
227 | ||
228 | class wxTimerUnixModule : public wxModule | |
229 | { | |
230 | public: | |
231 | wxTimerUnixModule() {} | |
232 | virtual bool OnInit() { return true; } | |
233 | virtual void OnExit() { wxTimerScheduler::Shutdown(); } | |
234 | ||
235 | DECLARE_DYNAMIC_CLASS(wxTimerUnixModule) | |
236 | }; | |
237 | ||
238 | IMPLEMENT_DYNAMIC_CLASS(wxTimerUnixModule, wxModule) | |
239 | ||
240 | // ============================================================================ | |
241 | // global functions | |
242 | // ============================================================================ | |
243 | ||
244 | wxUsecClock_t wxGetLocalTimeUsec() | |
245 | { | |
246 | #ifdef HAVE_GETTIMEOFDAY | |
247 | struct timeval tv; | |
248 | if ( wxGetTimeOfDay(&tv) != -1 ) | |
249 | { | |
250 | wxUsecClock_t val = 1000000L; // usec/sec | |
251 | val *= tv.tv_sec; | |
252 | return val + tv.tv_usec; | |
253 | } | |
254 | #endif // HAVE_GETTIMEOFDAY | |
255 | ||
256 | return wxGetLocalTimeMillis() * 1000L; | |
257 | } | |
258 | ||
259 | #endif // wxUSE_TIMER | |
260 |