+ wxMutexInternal( wxMutexType mutexType );
+ ~wxMutexInternal();
+
+ wxMutexError Lock();
+ wxMutexError TryLock();
+ wxMutexError Unlock();
+
+ bool IsOk() const
+ { return m_isOk; }
+
+private:
+ pthread_mutex_t m_mutex;
+ bool m_isOk;
+
+ // wxConditionInternal uses our m_mutex
+ friend class wxConditionInternal;
+};
+
+#ifdef HAVE_PTHREAD_MUTEXATTR_T
+// on some systems pthread_mutexattr_settype() is not in the headers (but it is
+// in the library, otherwise we wouldn't compile this code at all)
+extern "C" int pthread_mutexattr_settype( pthread_mutexattr_t *, int );
+#endif
+
+wxMutexInternal::wxMutexInternal( wxMutexType mutexType )
+{
+ int err;
+ switch ( mutexType )
+ {
+ case wxMUTEX_RECURSIVE:
+ // support recursive locks like Win32, i.e. a thread can lock a
+ // mutex which it had itself already locked
+ //
+ // unfortunately initialization of recursive mutexes is non
+ // portable, so try several methods
+#ifdef HAVE_PTHREAD_MUTEXATTR_T
+ {
+ pthread_mutexattr_t attr;
+ pthread_mutexattr_init( &attr );
+ pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE );
+
+ err = pthread_mutex_init( &m_mutex, &attr );
+ }
+#elif defined(HAVE_PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
+ // we can use this only as initializer so we have to assign it
+ // first to a temp var - assigning directly to m_mutex wouldn't
+ // even compile
+ {
+ pthread_mutex_t mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+ m_mutex = mutex;
+ }
+#else // no recursive mutexes
+ err = EINVAL;
+#endif // HAVE_PTHREAD_MUTEXATTR_T/...
+ break;
+
+ default:
+ wxFAIL_MSG( wxT("unknown mutex type") );
+ // fall through
+
+ case wxMUTEX_DEFAULT:
+ err = pthread_mutex_init( &m_mutex, NULL );
+ break;
+ }
+
+ m_isOk = err == 0;
+ if ( !m_isOk )
+ {
+ wxLogApiError( wxT("pthread_mutex_init()"), err );
+ }
+}
+
+wxMutexInternal::~wxMutexInternal()
+{
+ if ( m_isOk )
+ {
+ int err = pthread_mutex_destroy( &m_mutex );
+ if ( err != 0 )
+ {
+ wxLogApiError( wxT("pthread_mutex_destroy()"), err );
+ }
+ }
+}
+
+wxMutexError wxMutexInternal::Lock()
+{
+ int err = pthread_mutex_lock( &m_mutex );
+ switch ( err )
+ {
+ case EDEADLK:
+ // only error checking mutexes return this value and so it's an
+ // unexpected situation -- hence use assert, not wxLogDebug
+ wxFAIL_MSG( wxT("mutex deadlock prevented") );
+ return wxMUTEX_DEAD_LOCK;
+
+ case EINVAL:
+ wxLogDebug( wxT("pthread_mutex_lock(): mutex not initialized.") );
+ break;
+
+ case 0:
+ return wxMUTEX_NO_ERROR;
+
+ default:
+ wxLogApiError( wxT("pthread_mutex_lock()"), err );
+ }
+
+ return wxMUTEX_MISC_ERROR;
+}
+
+wxMutexError wxMutexInternal::TryLock()
+{
+ int err = pthread_mutex_trylock( &m_mutex );
+ switch ( err )
projects / wxWidgets.git / blobdiff