Method allocate

include/daScript/misc/memory_model.h:82–101

            return ((b & (1u<<j))!=0);
        }
        __forceinline char * allocate ( ) {
            if ( allocated == total ) return nullptr;
            uint64_t maxt = total / 32;
            for ( uint64_t t=0; t!=maxt; ++t ) {
                uint32_t b = bits[look];
                uint32_t nb = ~b;
                if ( nb ) {
                    uint32_t j = 31 - das_clz(nb);
                    bits[look] = b | (1u<<j);
                    allocated ++;
                    uint64_t ofs = (look * 32 + j);
                    DAS_ASSERT(ofs < total);
                    return data + ofs * size;
                }
                look = look + 1;
                if ( look == maxt ) look = 0;
            }
            DAS_ASSERT(0 && "allocated reports room, but no bits are available");
            return nullptr;
        }
        __forceinline void free ( char * ptr ) {
            ptrdiff_t idx = (ptr - data) / size;
            DAS_ASSERT ( idx>=0 && idx<ptrdiff_t(total) );