Changeset 19058 for trunk/psLib/src/fft/psFFT.h

Timestamp:

Aug 13, 2008, 5:23:13 PM (18 years ago)

Author:

Paul Price

Message:

Learned that of all the fftw_ calls, only fftw_execute is thread-safe: all other calls have to be wrapped in a mutex for thread safety.

File:

• trunk/psLib/src/fft/psFFT.h (modified) (1 diff)

trunk/psLib/src/fft/psFFT.h

@@ -2 +2 @@
 #define PS_FFT_H
 
-/// Set number of threads to use with all FFTs
+// Only fftw_execute is thread-safe: all other calls have to be wrapped in a mutex
+
+/// Lock FFT mutex
+void psFFTLock(void);
+
+/// Unlock FFT mutex
+void psFFTUnlock(void);
+
+/// Set number of threads for FFTW to use
 ///
-/// Pass zero to turn off threading
+/// Pass zero to turn off threading.  Note that the FFTW threads are *independent* of any other threads set up
+/// throuhg, e.g., psThread.
 bool psFFTThreads(int threads           // Number of threads
     );