#if defined __OPENCL_VERSION__

    #define CCL_UINT   __attribute__((aligned(4)))  uint
    #define CCL_FLOAT  __attribute__((aligned(4)))  float
    #define CCL_FLOAT4 __attribute__((aligned(16))) float4

#elif defined __GNUC__

    #define CCL_UINT   __attribute__((aligned(4)))  cl_uint
    #define CCL_FLOAT  __attribute__((aligned(4)))  cl_float
    #define CCL_FLOAT4 __attribute__((aligned(16))) cl_float4

#endif

struct __attribute__((packed))
_Particle {
    CCL_FLOAT4 position;
    CCL_FLOAT4 velocity;
    CCL_FLOAT4 acceleration;
    CCL_FLOAT  mass;
    CCL_FLOAT  density;
    CCL_FLOAT  pressure;
    CCL_UINT   assigned;
};

typedef struct _Particle Particle;