| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: threadsgi.cpp |
| 3 | // Purpose: wxThread (SGI) Implementation |
| 4 | // Author: Original from Wolfram Gloger/Guilhem Lavaux |
| 5 | // Modified by: |
| 6 | // Created: 04/22/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998) |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | #ifdef __GNUG__ |
| 12 | #pragma implementation "thread.h" |
| 13 | #endif |
| 14 | |
| 15 | #include <stdio.h> |
| 16 | #include <unistd.h> |
| 17 | |
| 18 | #include <signal.h> |
| 19 | #include <sys/wait.h> |
| 20 | #include <sys/prctl.h> |
| 21 | #include "wx/thread.h" |
| 22 | #include "wx/module.h" |
| 23 | #include "wx/utils.h" |
| 24 | |
| 25 | enum thread_state { |
| 26 | STATE_IDLE = 0, |
| 27 | STATE_RUNNING, |
| 28 | STATE_CANCELED, |
| 29 | STATE_EXITED |
| 30 | }; |
| 31 | |
| 32 | ///////////////////////////////////////////////////////////////////////////// |
| 33 | // Static variables |
| 34 | ///////////////////////////////////////////////////////////////////////////// |
| 35 | |
| 36 | static int p_mainid; |
| 37 | wxMutex *wxMainMutex; |
| 38 | |
| 39 | #include "threadgui.inc" |
| 40 | |
| 41 | ///////////////////////////////////////////////////////////////////////////// |
| 42 | // Unix implementations (SGI threads) |
| 43 | ///////////////////////////////////////////////////////////////////////////// |
| 44 | |
| 45 | class wxMutexInternal { |
| 46 | public: |
| 47 | abilock_t p_mutex; |
| 48 | }; |
| 49 | |
| 50 | wxMutex::wxMutex() |
| 51 | { |
| 52 | m_locked = 0; |
| 53 | p_internal = new wxMutexInternal; |
| 54 | init_lock(&(p_internal->p_mutex)); |
| 55 | } |
| 56 | |
| 57 | wxMutex::~wxMutex() |
| 58 | { |
| 59 | if (m_locked > 0) |
| 60 | wxDebugMsg("wxMutex warning: freeing a locked mutex (%d locks)\n", |
| 61 | m_locked); |
| 62 | delete p_internal; |
| 63 | } |
| 64 | |
| 65 | wxMutexError wxMutex::Lock() |
| 66 | { |
| 67 | spin_lock(&(p_internal->p_mutex)); |
| 68 | m_locked++; |
| 69 | return MUTEX_NO_ERROR; |
| 70 | } |
| 71 | |
| 72 | wxMutexError wxMutex::TryLock() |
| 73 | { |
| 74 | if (acquire_lock(&(p_internal->p_mutex)) != 0) |
| 75 | return MUTEX_BUSY; |
| 76 | m_locked++; |
| 77 | return MUTEX_NO_ERROR; |
| 78 | } |
| 79 | |
| 80 | wxMutexError wxMutex::Unlock() |
| 81 | { |
| 82 | if (m_locked == 0) |
| 83 | return MUTEX_UNLOCKED; |
| 84 | release_lock(&(p_internal->p_mutex)); |
| 85 | m_locked--; |
| 86 | return MUTEX_NO_ERROR; |
| 87 | } |
| 88 | |
| 89 | // GL: Don't know how it works on SGI. Wolfram ? |
| 90 | |
| 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; } |
| 98 | |
| 99 | class |
| 100 | wxThreadPrivate { |
| 101 | public: |
| 102 | wxThreadPrivate() { thread_id = 0; state = STATE_IDLE; } |
| 103 | ~wxThreadPrivate() {} |
| 104 | static void SprocStart(void *ptr); |
| 105 | static void SignalHandler(int sig); |
| 106 | public: |
| 107 | int state, thread_id; |
| 108 | void* exit_status; |
| 109 | }; |
| 110 | |
| 111 | void wxThreadPrivate::SprocStart(void *ptr) |
| 112 | { |
| 113 | void* status; |
| 114 | |
| 115 | wxThread *thr = (wxThread *)ptr; |
| 116 | |
| 117 | thr->p_internal->thread_id = getpid(); |
| 118 | thr->p_internal->exit_status = 0; |
| 119 | status = thr->Entry(); |
| 120 | thr->Exit(status); |
| 121 | } |
| 122 | |
| 123 | void wxThread::Exit(void* status) |
| 124 | { |
| 125 | wxThread* ptr = this; |
| 126 | THREAD_SEND_EXIT_MSG(ptr); |
| 127 | p_internal->state = STATE_EXITED; |
| 128 | p_internal->exit_status = status; |
| 129 | _exit(0); |
| 130 | } |
| 131 | |
| 132 | wxThreadError wxThread::Create() |
| 133 | { |
| 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; |
| 140 | } |
| 141 | return THREAD_NO_ERROR; |
| 142 | } |
| 143 | |
| 144 | wxThreadError wxThread::Destroy() |
| 145 | { |
| 146 | if (p_internal->state == STATE_RUNNING) |
| 147 | p_internal->state = STATE_CANCELED; |
| 148 | |
| 149 | return THREAD_NO_ERROR; |
| 150 | } |
| 151 | |
| 152 | wxThreadError wxThread::Pause() |
| 153 | { |
| 154 | return THREAD_NO_ERROR; |
| 155 | } |
| 156 | |
| 157 | wxThreadError wxThread::Resume() |
| 158 | { |
| 159 | return THREAD_NO_ERROR; |
| 160 | } |
| 161 | |
| 162 | void *wxThread::Join() |
| 163 | { |
| 164 | if (p_internal->state != STATE_IDLE) { |
| 165 | bool do_unlock = wxThread::IsMain(); |
| 166 | int stat; |
| 167 | |
| 168 | if (do_unlock) |
| 169 | wxMainMutex->Unlock(); |
| 170 | waitpid(p_internal->thread_id, &stat, 0); |
| 171 | if (do_unlock) |
| 172 | wxMainMutex->Lock(); |
| 173 | if (!WIFEXITED(stat) && !WIFSIGNALED(stat)) |
| 174 | return 0; |
| 175 | p_internal->state = STATE_IDLE; |
| 176 | return p_internal->exit_status; |
| 177 | } |
| 178 | return 0; |
| 179 | } |
| 180 | |
| 181 | unsigned long wxThread::GetID() const |
| 182 | { |
| 183 | return (unsigned long)p_internal->thread_id; |
| 184 | } |
| 185 | |
| 186 | void wxThread::TestDestroy() |
| 187 | { |
| 188 | if (p_internal->state == STATE_CANCELED) { |
| 189 | p_internal->exit_status = 0; |
| 190 | _exit(0); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | void wxThread::SetPriority(int prio) |
| 195 | { |
| 196 | } |
| 197 | |
| 198 | int wxThread::GetPriority() const |
| 199 | { |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | bool wxThread::IsMain() |
| 204 | { |
| 205 | return (int)getpid() == main_id; |
| 206 | } |
| 207 | |
| 208 | bool wxThread::IsAlive() const |
| 209 | { |
| 210 | return (p_internal->state == STATE_RUNNING); |
| 211 | } |
| 212 | |
| 213 | bool wxThread::IsRunning() const |
| 214 | { |
| 215 | return (p_internal->state == STATE_RUNNING); |
| 216 | } |
| 217 | |
| 218 | wxThread::wxThread() |
| 219 | { |
| 220 | p_internal = new wxThreadPrivate(); |
| 221 | } |
| 222 | |
| 223 | wxThread::~wxThread() |
| 224 | { |
| 225 | Cancel(); |
| 226 | Join(); |
| 227 | delete p_internal; |
| 228 | } |
| 229 | |
| 230 | // The default callback just joins the thread and throws away the result. |
| 231 | void wxThread::OnExit() |
| 232 | { |
| 233 | Join(); |
| 234 | } |
| 235 | |
| 236 | // Global initialization |
| 237 | class wxThreadModule : public wxModule { |
| 238 | DECLARE_DYNAMIC_CLASS(wxThreadModule) |
| 239 | public: |
| 240 | virtual bool OnInit() { |
| 241 | wxMainMutex = new wxMutex(); |
| 242 | wxThreadGuiInit(); |
| 243 | p_mainid = (int)getpid(); |
| 244 | wxMainMutex->Lock(); |
| 245 | } |
| 246 | |
| 247 | virtual void OnExit() { |
| 248 | wxMainMutex->Unlock(); |
| 249 | wxThreadGuiExit(); |
| 250 | delete wxMainMutex; |
| 251 | } |
| 252 | }; |
| 253 | |
| 254 | IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule) |