call cysignals hook

cypari2/__init__.py

@@ -1,3 +1,6 @@
 from .pari_instance import Pari
 from .handle_error import PariError
 from .gen import Gen
+from .custom_block import init_custom_block
+
+init_custom_block()

cypari2/custom_block.pyx

@@ -0,0 +1,27 @@
+# distutils: libraries = gmp pari
+
+#*****************************************************************************
+#  Distributed under the terms of the GNU General Public License (GPL)
+#  as published by the Free Software Foundation; either version 2 of
+#  the License, or (at your option) any later version.
+#                  http://www.gnu.org/licenses/
+#*****************************************************************************
+
+from cysignals.signals cimport add_custom_signals
+
+cdef extern from "pari/pari.h":
+    int     PARI_SIGINT_block, PARI_SIGINT_pending
+
+cdef int custom_signal_is_blocked():
+    return PARI_SIGINT_block
+
+cdef void custom_signal_unblock():
+    PARI_SIGINT_block = 0
+
+cdef void custom_set_pending_signal(int sig):
+    PARI_SIGINT_pending = sig
+
+def init_custom_block():
+    add_custom_signals(&custom_signal_is_blocked,
+                       &custom_signal_unblock,
+                       &custom_set_pending_signal)