[h5py] 283/455: Add H5Pset_sieve_buf_size

[Ghislain Vaillant]

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ghisvail-guest pushed a commit to annotated tag 1.3.0
in repository h5py.

commit 2172cc51f3a2c97ef1d8e1d41ecd39cfcf081019
Author: andrewcollette <andrew.collette at gmail.com>
Date:   Wed Jun 17 20:16:17 2009 +0000

    Add H5Pset_sieve_buf_size
---
 h5py/defs.pxd          |  3 ++-
 h5py/h5p_faid.pxi      | 23 +++++++++++++++++++++++
 h5py/tests/test_h5p.py |  4 ++++
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/h5py/defs.pxd b/h5py/defs.pxd
index 03d11da..b45a8b4 100644
--- a/h5py/defs.pxd
+++ b/h5py/defs.pxd
@@ -758,7 +758,8 @@ cdef extern from "hdf5.h":
   H5Z_EDC_t H5Pget_edc_check(hid_t plist) except *
 
   # Other properties
-  herr_t H5Pset_sieve_buf_size(hid_t fapl_id, hsize_t size) except *
+  herr_t H5Pset_sieve_buf_size(hid_t fapl_id, size_t size) except *
+  herr_t H5Pget_sieve_buf_size(hid_t fapl_id, size_t *size) except *
   herr_t H5Pset_fapl_log(hid_t fapl_id, char *logfile,
                          unsigned int flags, size_t buf_size) except *
 
diff --git a/h5py/h5p_faid.pxi b/h5py/h5p_faid.pxi
index 9eb8862..4bfa84a 100644
--- a/h5py/h5p_faid.pxi
+++ b/h5py/h5p_faid.pxi
@@ -187,4 +187,27 @@ cdef class PropFAID(PropInstanceID):
         H5Pget_cache(self.id, &mdc, &rdcc, &rdcc_nbytes, &w0)
         return (mdc, rdcc, rdcc_nbytes, w0)
 
+    @sync
+    def set_sieve_buf_size(self, size_t size):
+        """ (UINT size)
+
+        Set the maximum size of the data sieve buffer (in bytes).  This
+        buffer can improve I/O performance for hyperslab I/O, by combining
+        reads and writes into blocks of the given size.  The default is 64k.
+        """
+        H5Pset_sieve_buf_size(self.id, size)
+
+    @sync
+    def get_sieve_buf_size(self):
+        """ () => UINT size
+
+        Get the current maximum size of the data sieve buffer (in bytes).
+        """
+        cdef size_t size
+        H5Pget_sieve_buf_size(self.id, &size)
+        return size
+
+
+
+
 
diff --git a/h5py/tests/test_h5p.py b/h5py/tests/test_h5p.py
index 0676033..8de5d41 100644
--- a/h5py/tests/test_h5p.py
+++ b/h5py/tests/test_h5p.py
@@ -72,6 +72,10 @@ class TestFAID(unittest.TestCase):
         self.p.set_fapl_core(*settings)
         self.assertEqual(self.p.get_fapl_core(), settings)
 
+    def test_sieve(self):
+        self.p.get_sieve_buf_size()
+        self.p.set_sieve_buf_size(128*1024)
+        self.assertEqual(self.p.get_sieve_buf_size(), 128*1024)
 
 class TestDCID(unittest.TestCase):
 

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