Dag Sverre Seljebotn skrev:
> cdef extern from *:
> ctypedef int vint "volatile int"
>
> What you said is: typedef "int" as "vint" Cython-side and "volatile int"
> C-side.
>
>
Right... I see that it works :-)
Hm... that remids me: should we add a "volatile" keyword to the buffer
constructor as well? It would work like "readonly", except that the
content of the buffer is declared volatile.
Volatile is useful if the buffer is filled with data from some hardware
interrupt. Volatile is also be useful when multiple threads are reading
and writing to the same buffer.
I have use for this when reading 16 bit data from an array of 32 ADCs,
sampling at 48 kHz:
cdef np.ndarray[np.int16_t, ndim=2, mode="c", volatile=True] adc_buffer
adc_buffer = np.zeros((48000,32), dtype=np.int16) # filled from
hardware interrupt
# once every second
Sturla Molden
_______________________________________________
Cython-dev mailing list
[email protected]
http://codespeak.net/mailman/listinfo/cython-dev
