QgsMalloc, QgsCalloc, QgsFree

src/core/qgis.cpp

@@ -21,6 +21,7 @@
 #endif
 #include <QCoreApplication>
 #include "qgsconfig.h"
+#include "qgslogger.h"
 
 #include <ogr_api.h>
 
@@ -104,3 +105,38 @@ QString QGis::tr( QGis::UnitType unit )
 {
   return QCoreApplication::translate( "QGis::UnitType", qPrintable( toLiteral( unit ) ) );
 }
+
+void *QgsMalloc( size_t size )
+{
+  if ( size == 0 || long( size ) < 0 )
+  {
+    QgsDebugMsg( QString( "Negative or zero size %1." ).arg( size ) );
+    return NULL;
+  }
+  void *p = malloc( size );
+  if ( p == NULL )
+  {
+    QgsDebugMsg( QString( "Allocation of %1 bytes failed." ).arg( size ) );
+  }
+  return p;
+}
+
+void *QgsCalloc( size_t nmemb, size_t size )
+{
+  if ( nmemb == 0 || long( nmemb ) < 0 || size == 0 || long( size ) < 0 )
+  {
+    QgsDebugMsg( QString( "Negative or zero nmemb %1 or size %2." ).arg( nmemb ).arg( size ) );
+    return NULL;
+  }
+  void *p = QgsMalloc( nmemb * size );
+  if ( p != NULL )
+  {
+    memset( p, 0, nmemb * size );
+  }
+  return p;
+}
+
+void QgsFree( void *ptr )
+{
+  free( ptr );
+}

src/core/qgis.h

@@ -21,6 +21,7 @@
 #include <QEvent>
 #include <QString>
 #include <QMetaType>
+#include <stdlib.h>
 #include <cfloat>
 #include <cmath>
 #include <qnumeric.h>
@@ -172,6 +173,25 @@ inline bool doubleNearSig( double a, double b, int significantDigits = 10 )
          qRound( ar * pow( 10.0, significantDigits ) ) == qRound( br * pow( 10.0, significantDigits ) ) ;
 }
 
+/** Allocates size bytes and returns a pointer to the allocated  memory.
+    Works like C malloc() but prints debug message by QgsLogger if allocation fails.
+    @param size size in bytes
+ */
+void *QgsMalloc( size_t size );
+
+/** Allocates  memory for an array of nmemb elements of size bytes each and returns
+    a pointer to the allocated memory. Works like C calloc() but prints debug message
+    by QgsLogger if allocation fails.
+    @param nmemb number of elements
+    @param size size of element in bytes
+ */
+void *QgsCalloc( size_t nmemb, size_t size );
+
+/** Frees the memory space  pointed  to  by  ptr. Works like C free().
+    @param ptr pointer to memory space
+ */
+void QgsFree( void *ptr );
+
 /** Wkt string that represents a geographic coord sys
  * @note added in 1.8 to replace GEOWkt
  */