Posted by Felix on Jan 07, 2012; 1:02pm
URL: https://forum.jogamp.org/CLBuffer-getBuffer-rewind-tp3640166.html

Hi,

I experienced several JVM crashes on OSX 10.6 with varying crash reports (Crashed compile thread2, modified freed object, System.getEnv() - method not found, to name a few). Basically the only thing my program did was:

(1) creating an uninitialized buffer using "context.createFloatBuffer(warpGlobalWorkSize, CLMemory.Mem.READ_WRITE)"
(2) reading a CLBuffer<FloatBuffer> back to main memory using "putReadBuffer"
(3) Getting the FloatBuffer using "getBuffer"
(4) reading some floats from the buffer which changes the buffer's position
(5) goto 2
For now things seam to be much better after I added "buffer.rewind()" after reading the floats in (4).

Is that the expected behavior? Is rewind() necessary by design? Couldn't rewind be called internally?

Felix