| 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 | #include "wx/log.h" |
| 25 | |
| 26 | #include "gdk/gdk.h" |
| 27 | #include "gtk/gtk.h" |
| 28 | |
| 29 | enum thread_state |
| 30 | { |
| 31 | STATE_IDLE = 0, |
| 32 | STATE_RUNNING, |
| 33 | STATE_CANCELED, |
| 34 | STATE_EXITED |
| 35 | }; |
| 36 | |
| 37 | ///////////////////////////////////////////////////////////////////////////// |
| 38 | // Static variables |
| 39 | ///////////////////////////////////////////////////////////////////////////// |
| 40 | |
| 41 | static int p_mainid; |
| 42 | wxMutex *wxMainMutex; |
| 43 | |
| 44 | #include "threadgui.inc" |
| 45 | |
| 46 | ///////////////////////////////////////////////////////////////////////////// |
| 47 | // Unix implementations (SGI threads) |
| 48 | ///////////////////////////////////////////////////////////////////////////// |
| 49 | |
| 50 | class wxMutexInternal { |
| 51 | public: |
| 52 | abilock_t p_mutex; |
| 53 | }; |
| 54 | |
| 55 | wxMutex::wxMutex() |
| 56 | { |
| 57 | m_locked = 0; |
| 58 | p_internal = new wxMutexInternal; |
| 59 | init_lock(&(p_internal->p_mutex)); |
| 60 | } |
| 61 | |
| 62 | wxMutex::~wxMutex() |
| 63 | { |
| 64 | if (m_locked > 0) |
| 65 | wxLogDebug( "wxMutex warning: freeing a locked mutex (%d locks)\n", m_locked ); |
| 66 | delete p_internal; |
| 67 | } |
| 68 | |
| 69 | wxMutexError wxMutex::Lock() |
| 70 | { |
| 71 | spin_lock(&(p_internal->p_mutex)); |
| 72 | m_locked++; |
| 73 | return wxMUTEX_NO_ERROR; |
| 74 | } |
| 75 | |
| 76 | wxMutexError wxMutex::TryLock() |
| 77 | { |
| 78 | if (acquire_lock(&(p_internal->p_mutex)) != 0) |
| 79 | return wxMUTEX_BUSY; |
| 80 | m_locked++; |
| 81 | return wxMUTEX_NO_ERROR; |
| 82 | } |
| 83 | |
| 84 | wxMutexError wxMutex::Unlock() |
| 85 | { |
| 86 | if (m_locked == 0) |
| 87 | return wxMUTEX_UNLOCKED; |
| 88 | release_lock(&(p_internal->p_mutex)); |
| 89 | m_locked--; |
| 90 | return wxMUTEX_NO_ERROR; |
| 91 | } |
| 92 | |
| 93 | // GL: Don't know how it works on SGI. Wolfram ? |
| 94 | |
| 95 | wxCondition::wxCondition() {} |
| 96 | wxCondition::~wxCondition() {} |
| 97 | int wxCondition::Wait(wxMutex& WXUNUSED(mutex)) { return 0;} |
| 98 | int wxCondition::Wait(wxMutex& WXUNUSED(mutex), unsigned long WXUNUSED(sec), |
| 99 | unsigned long WXUNUSED(nsec)) { return 0; } |
| 100 | int wxCondition::Signal() { return 0; } |
| 101 | int wxCondition::Broadcast() { return 0; } |
| 102 | |
| 103 | class |
| 104 | wxThreadPrivate { |
| 105 | public: |
| 106 | wxThreadPrivate() { thread_id = 0; state = STATE_IDLE; } |
| 107 | ~wxThreadPrivate() {} |
| 108 | static void SprocStart(void *ptr); |
| 109 | static void SignalHandler(int sig); |
| 110 | public: |
| 111 | int state, thread_id; |
| 112 | void* exit_status; |
| 113 | }; |
| 114 | |
| 115 | void wxThreadPrivate::SprocStart(void *ptr) |
| 116 | { |
| 117 | void* status; |
| 118 | |
| 119 | wxThread *thr = (wxThread *)ptr; |
| 120 | |
| 121 | thr->p_internal->thread_id = getpid(); |
| 122 | thr->p_internal->exit_status = 0; |
| 123 | status = thr->Entry(); |
| 124 | thr->Exit(status); |
| 125 | } |
| 126 | |
| 127 | void wxThread::Exit(void* status) |
| 128 | { |
| 129 | wxThread* ptr = this; |
| 130 | THREAD_SEND_EXIT_MSG(ptr); |
| 131 | p_internal->state = STATE_EXITED; |
| 132 | p_internal->exit_status = status; |
| 133 | _exit(0); |
| 134 | } |
| 135 | |
| 136 | wxThreadError wxThread::Create() |
| 137 | { |
| 138 | if (p_internal->state != STATE_IDLE) |
| 139 | return wxTHREAD_RUNNING; |
| 140 | p_internal->state = STATE_RUNNING; |
| 141 | if (sproc(p_internal->SprocStart, PR_SALL, this) < 0) { |
| 142 | p_internal->state = STATE_IDLE; |
| 143 | return wxTHREAD_NO_RESOURCE; |
| 144 | } |
| 145 | return wxTHREAD_NO_ERROR; |
| 146 | } |
| 147 | |
| 148 | wxThreadError wxThread::Destroy() |
| 149 | { |
| 150 | if (p_internal->state == STATE_RUNNING) |
| 151 | p_internal->state = STATE_CANCELED; |
| 152 | |
| 153 | return wxTHREAD_NO_ERROR; |
| 154 | } |
| 155 | |
| 156 | wxThreadError wxThread::Pause() |
| 157 | { |
| 158 | return wxTHREAD_NO_ERROR; |
| 159 | } |
| 160 | |
| 161 | wxThreadError wxThread::Resume() |
| 162 | { |
| 163 | return wxTHREAD_NO_ERROR; |
| 164 | } |
| 165 | |
| 166 | void *wxThread::Join() |
| 167 | { |
| 168 | if (p_internal->state != STATE_IDLE) { |
| 169 | bool do_unlock = wxThread::IsMain(); |
| 170 | int stat; |
| 171 | |
| 172 | if (do_unlock) |
| 173 | wxMainMutex->Unlock(); |
| 174 | waitpid(p_internal->thread_id, &stat, 0); |
| 175 | if (do_unlock) |
| 176 | wxMainMutex->Lock(); |
| 177 | if (!WIFEXITED(stat) && !WIFSIGNALED(stat)) |
| 178 | return 0; |
| 179 | p_internal->state = STATE_IDLE; |
| 180 | return p_internal->exit_status; |
| 181 | } |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | unsigned long wxThread::GetID() const |
| 186 | { |
| 187 | return (unsigned long)p_internal->thread_id; |
| 188 | } |
| 189 | |
| 190 | void wxThread::TestDestroy() |
| 191 | { |
| 192 | if (p_internal->state == STATE_CANCELED) { |
| 193 | p_internal->exit_status = 0; |
| 194 | _exit(0); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | void wxThread::SetPriority(int prio) |
| 199 | { |
| 200 | } |
| 201 | |
| 202 | int wxThread::GetPriority() const |
| 203 | { |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | bool wxThread::IsMain() |
| 208 | { |
| 209 | return (int)getpid() == main_id; |
| 210 | } |
| 211 | |
| 212 | bool wxThread::IsAlive() const |
| 213 | { |
| 214 | return (p_internal->state == STATE_RUNNING); |
| 215 | } |
| 216 | |
| 217 | bool wxThread::IsRunning() const |
| 218 | { |
| 219 | return (p_internal->state == STATE_RUNNING); |
| 220 | } |
| 221 | |
| 222 | wxThread::wxThread() |
| 223 | { |
| 224 | p_internal = new wxThreadPrivate(); |
| 225 | } |
| 226 | |
| 227 | wxThread::~wxThread() |
| 228 | { |
| 229 | Cancel(); |
| 230 | Join(); |
| 231 | delete p_internal; |
| 232 | } |
| 233 | |
| 234 | // The default callback just joins the thread and throws away the result. |
| 235 | void wxThread::OnExit() |
| 236 | { |
| 237 | Join(); |
| 238 | } |
| 239 | |
| 240 | // Global initialization |
| 241 | |
| 242 | class wxThreadModule : public wxModule |
| 243 | { |
| 244 | public: |
| 245 | virtual bool OnInit(); |
| 246 | virtual void OnExit(); |
| 247 | |
| 248 | private: |
| 249 | DECLARE_DYNAMIC_CLASS(wxThreadModule) |
| 250 | }; |
| 251 | |
| 252 | IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule) |
| 253 | |
| 254 | bool wxThreadModule::OnInit() |
| 255 | { |
| 256 | wxMainMutex = new wxMutex(); |
| 257 | wxThreadGuiInit(); |
| 258 | p_mainid = (int)getpid(); |
| 259 | wxMainMutex->Lock(); |
| 260 | return TRUE; |
| 261 | } |
| 262 | |
| 263 | void wxThreadModule::OnExit() |
| 264 | { |
| 265 | wxMainMutex->Unlock(); |
| 266 | wxThreadGuiExit(); |
| 267 | delete wxMainMutex; |
| 268 | } |
| 269 | |