Get the number of cores from HAL on Symbian.

Task-number: QTBUG-2199
Reviewed-by: Shane Kearns

1 files changed, 25 insertions, 2 deletions

diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp
index 5177339..9bfd85a 100644
--- a/src/corelib/thread/qthread_unix.cpp
+++ b/src/corelib/thread/qthread_unix.cpp
@@ -54,6 +54,11 @@
 #include <private/qeventdispatcher_unix_p.h>
 #endif
 
+#ifdef Q_OS_SYMBIAN
+#include <hal.h>
+#include <hal_data.h>
+#endif
+
 #include "qthreadstorage.h"
 
 #include "qthread_p.h"
@@ -63,6 +68,12 @@
 #include <sched.h>
 #include <errno.h>
 
+// You only find these enumerations on Symbian^3 onwards, so we need to provide our own
+// to remain compatible with older releases. They won't be called by pre-Sym^3 SDKs.
+
+// HALData::ENumCpus
+#define QT_HALData_ENumCpus 119
+
 #ifdef Q_OS_BSD4
 #include <sys/sysctl.h>
 #endif
@@ -422,8 +433,20 @@ int QThread::idealThreadCount()
     // as of aug 2008 Integrity only supports one single core CPU
     cores = 1;
 #elif defined(Q_OS_SYMBIAN)
-	 // ### TODO - Get the number of cores from HAL? when multicore architectures (SMP) are supported
-    cores = 1;
+    if (QSysInfo::symbianVersion() >= QSysInfo::SV_SF_3) {
+        TInt inumcpus;
+        TInt err;
+        err = HAL::Get(QT_HALData_ENumCpus, inumcpus);
+        if (err != KErrNone) {
+            cores = 1;
+        } else if ( inumcpus <= 0 ) {
+            cores = 1;
+        } else {
+            cores = inumcpus;
+        }
+    } else {
+        cores = 1;
+    }
 #elif defined(Q_OS_VXWORKS)
     // VxWorks
 #  if defined(QT_VXWORKS_HAS_CPUSET)