Expose the LARGEST_MEMBLOCK property in python.

Author: abergeron

pygpu/gpuarray.pxd

@@ -103,6 +103,7 @@ cdef extern from "gpuarray/buffer.h":
     int GA_CTX_PROP_MAXGSIZE0
     int GA_CTX_PROP_MAXGSIZE1
     int GA_CTX_PROP_MAXGSIZE2
+    int GA_CTX_PROP_LARGEST_MEMBLOCK
 
     int GA_BUFFER_PROP_SIZE
 

pygpu/gpuarray.pyx

@@ -1146,6 +1146,13 @@ cdef class GpuContext:
             ctx_property(self, GA_CTX_PROP_MAXGSIZE2, &res)
             return res
 
+    property largest_memblock:
+        "Size of the largest memory block you can allocate"
+        def __get__(self):
+            cdef size_t res
+            ctx_property(self, GA_CTX_PROP_LARGEST_MEMBLOCK, &res)
+            return res
+
 
 cdef class flags(object):
     cdef int fl