1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: wxThread (SGI) Implementation
4 // Author: Original from Wolfram Gloger/Guilhem Lavaux
8 // Copyright: (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998)
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
12 #pragma implementation "thread.h"
20 #include <sys/prctl.h>
21 #include "wx/thread.h"
22 #include "wx/module.h"
32 /////////////////////////////////////////////////////////////////////////////
34 /////////////////////////////////////////////////////////////////////////////
39 #include "threadgui.inc"
41 /////////////////////////////////////////////////////////////////////////////
42 // Unix implementations (SGI threads)
43 /////////////////////////////////////////////////////////////////////////////
45 class wxMutexInternal {
53 p_internal = new wxMutexInternal;
54 init_lock(&(p_internal->p_mutex));
60 wxDebugMsg("wxMutex warning: freeing a locked mutex (%d locks)\n",
65 wxMutexError wxMutex::Lock()
67 spin_lock(&(p_internal->p_mutex));
69 return MUTEX_NO_ERROR;
72 wxMutexError wxMutex::TryLock()
74 if (acquire_lock(&(p_internal->p_mutex)) != 0)
77 return MUTEX_NO_ERROR;
80 wxMutexError wxMutex::Unlock()
83 return MUTEX_UNLOCKED;
84 release_lock(&(p_internal->p_mutex));
86 return MUTEX_NO_ERROR;
89 // GL: Don't know how it works on SGI. Wolfram ?
91 wxCondition::wxCondition() {}
92 wxCondition::~wxCondition() {}
93 int wxCondition::Wait(wxMutex& WXUNUSED(mutex)) { return 0;}
94 int wxCondition::Wait(wxMutex& WXUNUSED(mutex), unsigned long WXUNUSED(sec),
95 unsigned long WXUNUSED(nsec)) { return 0; }
96 int wxCondition::Signal() { return 0; }
97 int wxCondition::Broadcast() { return 0; }
102 wxThreadPrivate() { thread_id = 0; state = STATE_IDLE; }
103 ~wxThreadPrivate() {}
104 static void SprocStart(void *ptr);
105 static void SignalHandler(int sig);
107 int state, thread_id;
111 void wxThreadPrivate::SprocStart(void *ptr)
115 wxThread *thr = (wxThread *)ptr;
117 thr->p_internal->thread_id = getpid();
118 thr->p_internal->exit_status = 0;
119 status = thr->Entry();
123 void wxThread::Exit(void* status)
125 wxThread* ptr = this;
126 THREAD_SEND_EXIT_MSG(ptr);
127 p_internal->state = STATE_EXITED;
128 p_internal->exit_status = status;
132 wxThreadError wxThread::Create()
134 if (p_internal->state != STATE_IDLE)
135 return THREAD_RUNNING;
136 p_internal->state = STATE_RUNNING;
137 if (sproc(p_internal->SprocStart, PR_SALL, this) < 0) {
138 p_internal->state = STATE_IDLE;
139 return THREAD_NO_RESOURCE;
141 return THREAD_NO_ERROR;
144 wxThreadError wxThread::Destroy()
146 if (p_internal->state == STATE_RUNNING)
147 p_internal->state = STATE_CANCELED;
149 return THREAD_NO_ERROR;
152 wxThreadError wxThread::Pause()
154 return THREAD_NO_ERROR;
157 wxThreadError wxThread::Resume()
159 return THREAD_NO_ERROR;
162 void *wxThread::Join()
164 if (p_internal->state != STATE_IDLE) {
165 bool do_unlock = wxThread::IsMain();
169 wxMainMutex->Unlock();
170 waitpid(p_internal->thread_id, &stat, 0);
173 if (!WIFEXITED(stat) && !WIFSIGNALED(stat))
175 p_internal->state = STATE_IDLE;
176 return p_internal->exit_status;
181 unsigned long wxThread::GetID() const
183 return (unsigned long)p_internal->thread_id;
186 void wxThread::TestDestroy()
188 if (p_internal->state == STATE_CANCELED) {
189 p_internal->exit_status = 0;
194 void wxThread::SetPriority(int prio)
198 int wxThread::GetPriority() const
203 bool wxThread::IsMain()
205 return (int)getpid() == main_id;
208 bool wxThread::IsAlive() const
210 return (p_internal->state == STATE_RUNNING);
213 bool wxThread::IsRunning() const
215 return (p_internal->state == STATE_RUNNING);
220 p_internal = new wxThreadPrivate();
223 wxThread::~wxThread()
230 // The default callback just joins the thread and throws away the result.
231 void wxThread::OnExit()
236 // Global initialization
237 class wxThreadModule : public wxModule {
238 DECLARE_DYNAMIC_CLASS(wxThreadModule)
240 virtual bool OnInit() {
241 wxMainMutex = new wxMutex();
243 p_mainid = (int)getpid();
247 virtual void OnExit() {
248 wxMainMutex->Unlock();
254 IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule)