Enable use of pthread's recursive mutexes

Signed-off-by: Bobby Bingham <koorogi@koorogi.info>
(cherry picked from commit 0b3c8dfbc927e2843c2c62842d53a723d1f1e727)

1 files changed, 6 insertions, 190 deletions

diff --git a/src/tools/qmutex_unix.cpp b/src/tools/qmutex_unix.cpp
index 5cb037a18..597d3e628 100644
--- a/src/tools/qmutex_unix.cpp
+++ b/src/tools/qmutex_unix.cpp
@@ -44,29 +44,12 @@
 
 typedef pthread_mutex_t     Q_MUTEX_T;
 
-// POSIX threads mutex types
-#if (defined(PTHREAD_MUTEX_RECURSIVE) && defined(PTHREAD_MUTEX_DEFAULT)) && \
-    !defined(Q_OS_UNIXWARE) && !defined(Q_OS_SOLARIS) && \
-    !defined(Q_OS_MAC)
-// POSIX 1003.1c-1995 - We love this OS
-#  define Q_MUTEX_SET_TYPE(a, b) pthread_mutexattr_settype((a), (b))
-#  if defined(QT_CHECK_RANGE)
-#    define Q_NORMAL_MUTEX_TYPE PTHREAD_MUTEX_ERRORCHECK
-#  else
-#    define Q_NORMAL_MUTEX_TYPE PTHREAD_MUTEX_DEFAULT
-#  endif
-#  define Q_RECURSIVE_MUTEX_TYPE PTHREAD_MUTEX_RECURSIVE
-#elif defined(MUTEX_NONRECURSIVE_NP) && defined(MUTEX_RECURSIVE_NP)
-// POSIX 1003.4a pthreads draft extensions
-#  define Q_MUTEX_SET_TYPE(a, b) pthread_mutexattr_setkind_np((a), (b));
-#  define Q_NORMAL_MUTEX_TYPE MUTEX_NONRECURSIVE_NP
-#  define Q_RECURSIVE_MUTEX_TYPE MUTEX_RECURSIVE_NP
+#if defined(QT_CHECK_RANGE)
+#  define Q_NORMAL_MUTEX_TYPE PTHREAD_MUTEX_ERRORCHECK
 #else
-// Unknown mutex types - skip them
-#  define Q_MUTEX_SET_TYPE(a, b)
-#  undef  Q_NORMAL_MUTEX_TYPE
-#  undef  Q_RECURSIVE_MUTEX_TYPE
+#  define Q_NORMAL_MUTEX_TYPE PTHREAD_MUTEX_DEFAULT
 #endif
+#define Q_RECURSIVE_MUTEX_TYPE PTHREAD_MUTEX_RECURSIVE
 
 #include "ntqmutex.h"
 #include "qmutex_p.h"
@@ -91,27 +74,6 @@ public:
     int count;
 };
 
-#ifndef    Q_RECURSIVE_MUTEX_TYPE
-class TQRecursiveMutexPrivate : public TQMutexPrivate
-{
-public:
-    TQRecursiveMutexPrivate();
-    ~TQRecursiveMutexPrivate();
-
-    void lock();
-    void unlock();
-    bool locked();
-    bool trylock();
-    int type() const;
-    int level();
-
-    int count;
-    pthread_t owner;
-    bool is_owned;
-    pthread_mutex_t handle2;
-};
-#endif // !Q_RECURSIVE_MUTEX_TYPE
-
 
 // Private class implementation
 
@@ -128,12 +90,11 @@ TQMutexPrivate::~TQMutexPrivate()
 
 // real mutex class
 TQRealMutexPrivate::TQRealMutexPrivate(bool recurs)
-    : count(0), recursive(recurs)
+    : recursive(recurs), count(0)
 {
     pthread_mutexattr_t attr;
     pthread_mutexattr_init(&attr);
-    Q_MUTEX_SET_TYPE(&attr, recursive ? Q_RECURSIVE_MUTEX_TYPE : Q_NORMAL_MUTEX_TYPE);
-    Q_UNUSED(recursive);
+    pthread_mutexattr_settype(&attr, recursive ? Q_RECURSIVE_MUTEX_TYPE : Q_NORMAL_MUTEX_TYPE);
     int ret = pthread_mutex_init(&handle, &attr);
     pthread_mutexattr_destroy(&attr);
 
@@ -201,146 +162,6 @@ int TQRealMutexPrivate::level()
 }
 
 
-#ifndef    Q_RECURSIVE_MUTEX_TYPE
-TQRecursiveMutexPrivate::TQRecursiveMutexPrivate()
-    : count(0), is_owned(false)
-{
-    pthread_mutexattr_t attr;
-    pthread_mutexattr_init(&attr);
-    Q_MUTEX_SET_TYPE(&attr, Q_NORMAL_MUTEX_TYPE);
-    int ret = pthread_mutex_init(&handle, &attr);
-    pthread_mutexattr_destroy(&attr);
-
-#  ifdef QT_CHECK_RANGE
-    if (ret)
-	tqWarning( "Mutex init failure: %s", strerror(ret) );
-#  endif
-
-    pthread_mutexattr_init(&attr);
-    ret = pthread_mutex_init( &handle2, &attr );
-    pthread_mutexattr_destroy(&attr);
-
-#  ifdef QT_CHECK_RANGE
-    if (ret)
-	tqWarning( "Mutex init failure: %s", strerror(ret) );
-#  endif
-}
-
-TQRecursiveMutexPrivate::~TQRecursiveMutexPrivate()
-{
-    int ret = pthread_mutex_destroy(&handle2);
-
-#  ifdef QT_CHECK_RANGE
-    if (ret)
-	tqWarning( "Mutex destroy failure: %s", strerror(ret) );
-#  endif
-}
-
-void TQRecursiveMutexPrivate::lock()
-{
-    pthread_mutex_lock(&handle2);
-
-    if (count > 0 && pthread_equal(owner, pthread_self()) ) {
-	count++;
-    } else {
-	pthread_mutex_unlock(&handle2);
-	pthread_mutex_lock(&handle);
-	pthread_mutex_lock(&handle2);
-	count = 1;
-	owner = pthread_self();
-	is_owned = true;
-    }
-
-    pthread_mutex_unlock(&handle2);
-}
-
-void TQRecursiveMutexPrivate::unlock()
-{
-    pthread_mutex_lock(&handle2);
-
-    if ( is_owned && pthread_equal(owner, pthread_self()) ) {
-	// do nothing if the count is already 0... to reflect the behaviour described
-	// in the docs
-	if (count && (--count) < 1) {
-	    count = 0;
-	    pthread_mutex_unlock(&handle);
-	}
-    } else {
-#ifdef QT_CHECK_RANGE
-	tqWarning("TQMutex::unlock: unlock from different thread than locker");
-#endif
-    }
-
-    pthread_mutex_unlock(&handle2);
-}
-
-bool TQRecursiveMutexPrivate::locked()
-{
-    pthread_mutex_lock(&handle2);
-
-    bool ret;
-    int code = pthread_mutex_trylock(&handle);
-
-    if (code == EBUSY) {
-	ret = TRUE;
-    } else {
-#ifdef QT_CHECK_RANGE
-	if (code)
-	    tqWarning("Mutex trylock failure: %s", strerror(code));
-#endif
-
-	pthread_mutex_unlock(&handle);
-	ret = FALSE;
-    }
-
-    pthread_mutex_unlock(&handle2);
-
-    return ret;
-}
-
-bool TQRecursiveMutexPrivate::trylock()
-{
-    bool ret = TRUE;
-
-    pthread_mutex_lock(&handle2);
-
-    if ( count > 0 && pthread_equal(owner, pthread_self()) ) {
-	count++;
-    } else {
-        int code = pthread_mutex_trylock(&handle);
-
-	if (code == EBUSY) {
-	    ret = FALSE;
-	} else if (code) {
-#ifdef QT_CHECK_RANGE
-	    tqWarning("Mutex trylock failure: %s", strerror(code));
-#endif
-	    ret = FALSE;
-	} else {
-	    count = 1;
-	    owner = pthread_self();
-	    is_owned = true;
-	}
-    }
-
-    pthread_mutex_unlock(&handle2);
-
-    return ret;
-}
-
-int TQRecursiveMutexPrivate::type() const
-{
-    return Q_MUTEX_RECURSIVE;
-}
-
-int TQRecursiveMutexPrivate::level()
-{
-    return count;
-}
-
-#endif // !Q_RECURSIVE_MUTEX_TYPE
-
-
 /*!
     \class TQMutex ntqmutex.h
     \threadsafe
@@ -445,11 +266,6 @@ int TQRecursiveMutexPrivate::level()
 */
 TQMutex::TQMutex(bool recursive)
 {
-#ifndef    Q_RECURSIVE_MUTEX_TYPE
-    if ( recursive )
-	d = new TQRecursiveMutexPrivate();
-    else
-#endif // !Q_RECURSIVE_MUTEX_TYPE
 	d = new TQRealMutexPrivate(recursive);
 }