cmMem: Added cmThPtrCAS() to allow mutlithread alloc.

cmMem.c

@@ -5,6 +5,7 @@
 #include "cmMem.h"
 #include "cmFloatTypes.h"
 #include "cmMath.h"
+#include "cmThread.h"
 
 // Block layout
 //
@@ -449,8 +450,14 @@ void* cmMmAllocate(
    {
      cmErrMsg(&p->err,kOkMmRC,"Breakpoint for memory allocation id:%i.",p->nextId);
    }
+
+   if( (long long)_cmMmDataToBasePtr(ndp,p->guardByteCnt) == 0x7fffed8d0b40 )
+   {
+     cmErrMsg(&p->err,kOkMmRC,"Breakpoint for memory allocation id:%i.",p->nextId);
+   }
    */
 
+
    // if we are tracking changes
    if( cmIsFlag(p->flags,kTrackMmFl) )
    {
@@ -470,23 +477,27 @@ void* cmMmAllocate(
          return ndp;
        }
 
+       cmThUIntIncr(&p->nextId,1);
+
        // initialize the new tracking recd
-       rp->uniqueId     = p->nextId;
        rp->dataPtr      = ndp;
        rp->dataByteCnt  = newByteCnt;
        rp->fileLine     = fileLine;
        rp->fileNameStr  = fileName;
        rp->funcNameStr  = funcName;
        rp->flags        = 0;
+       rp->uniqueId     = p->nextId;
+
+       cmMmRecd_t *oldp, *newp;
+       do
+       {
+         oldp         = p->listPtr;
+         newp         = rp;
          rp->linkPtr  = p->listPtr;
-
-       //printf("%i %i %s %i %s\n",rp->uniqueId,newByteCnt,funcName,fileLine,fileName);
-
-       p->listPtr = rp;
+       }while(!cmThPtrCAS(&p->listPtr,oldp,newp));
 
        assert( _cmMmCheckGuards(p,rp) == kOkMmRC );
 
-       ++p->nextId;
      }
      else // a reallocation occurred.
        if( orgDataPtr == ndp )